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Добірка наукової літератури з теми "Energy acce"

Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "Energy acce"

1

Peng, I.-Chen, Zhen Chen, Wei Sun, Ying-Shiuan Li, Traci LaNai Marin, Pang-Hung Hsu, Mei-I. Su та ін. "Glucagon regulates ACC activity in adipocytes through the CAMKKβ/AMPK pathway". American Journal of Physiology-Endocrinology and Metabolism 302, № 12 (15 червня 2012): E1560—E1568. http://dx.doi.org/10.1152/ajpendo.00504.2011.

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Анотація:
Glucagon is important for regulating lipid metabolism in part through its inhibition of fatty acid synthesis in adipocytes. Acetyl-CoA carboxylase 1 (ACC1) is the rate-limiting enzyme for fatty acid synthesis. Glucagon has been proposed to activate cAMP-dependent protein kinase A (PKA), which phosphorylates ACC1 to attenuate the lipogenic activity of ACC1. Because AMP-activated protein kinase (AMPK) also inhibits fatty acid synthesis by phosphorylation of ACC1, we examined the involvement of AMPK and its upstream kinase in the glucagon-elicited signaling in adipocytes in vitro and in vivo. LC-MS-MS analysis suggested that ACC1 was phosphorylated only at Ser79, an AMPK-specific site, in glucagon-treated adipocytes. Pharmacological inhibitors and siRNA knockdown of AMPK or PKA in adipocytes demonstrate that glucagon regulates ACC1 and ACC2 activity through AMPK but not PKA. By using Ca2+/calmodulin-dependent protein kinase kinase-β knockout (CaMKKβ−/−) mice and cultured adipocytes, we further show that glucagon activates the CaMKKβ/AMPK/ACC cascade. Additionally, fasting increases the phosphorylation of AMPK and ACC in CaMKKβ+/+ but not CaMKKβ−/− mice. These results indicate that CaMKKβ/AMPK signaling is an important molecular component in regulating lipid metabolism in adipocytes responding to glucagon and could be a therapeutic target for the dysregulation of energy storage.
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2

Sumarjo, Jojo, Sulistyo Sidik Purnomo, Insani Abdi Bangsa, and Dian Budhi Santoso. "IMPLEMENTASI TEKNOLOGI KINETIK TURBIN SEBAGAI PENUNJANG KEBUTUHAN ENERGI DI DESA TIRTASARI." SELAPARANG Jurnal Pengabdian Masyarakat Berkemajuan 4, no. 2 (April 21, 2021): 393. http://dx.doi.org/10.31764/jpmb.v4i2.4459.

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ABSTRAKTerbatasnya akses dan kebutuhan masyarakat dari penggunaan energi listrik sebagai penerangan jalan pada Desa Tirtasari, Karawang. Maka dirasa perlu ikut berkontribusi dalam pengabdian bidang ilmu dan teknologi. Hal ini untuk memanfaatkan energi baru terbarukan yang ekonomis dengan potensi energi alam sekitar. Oleh karena itu, tujuan dari kegiatan ini merancang alat teknologi berbasis energi turbin kinetik dan energi surya untuk menyelesaikan program ini. Pemanfaatan potensi energi yang dihasilkan dari aliran sungai dapat menghasilkan energi kinetik dari putaran turbin kinetik. Putaran yang dihasilkan dari turbin kinetik menghasilkan energi mekanik ke generator. Sehingga mampu membangkitkan energi listrik, sedangkan arus yang dihasilkan dari solar panel sebagai penggantinya. Maka metode pelaksanaan yang digunakan dalam kegiatan ini berupa pelatihan dan pendampingan pembuatan turbin. Hasil akhir dari kegiatan ini masyarakat dapat mengimplementasikannya secara langsung. Jika sewaktu-waktu aliran sungai mengecil, sehingga tidak mampu memutar turbin kinetik dan generator. Energi yang dihasilkan dari keduanya akan disimpan pada accu. Arus DC (direct current) yang disimpan pada accu akan di konverter menjadi arus AC (alternating current). Maka untuk mendapatkan listrik dengan kapasitas daya maksimum 150 Watt 220V. Adapun luaran dari pengabdian ini adalah terciptanya kemandirian energi dan pengabdian kepada masyarakat. Kata kunci: energi listrik; turbin kinetik; direct current; alternating current. ABSTRACTThe limited access and needs of the community from the use of electrical energy as a road lighting in Tirtasari Village, Karawang. So it is considered to have contributed to the dedication of science and technology. This is to utilize the renewable new energy that is economical with the potential of natural energy around. Therefore, the purpose of this activity designed energy-based technology tools kinetic turbine and solar energy to complete this program. The use of energy potential generated from the river flow can produce kinetic energy from the round of kinetic turbines. Rounds produced from kinetic turbines produce mechanical energy to generators. So that it can generate electrical energy, while the current generated from solar panel as a replacement. Then the method of implementation used in this activity is in the form of training and assistance for making turbines. The final result of this activity community can implement it directly. If at any time the river flow is reduced, so it is unable to play kinetic turbines and generators. The energy produced from both will be stored in Accu. The DC (Direct Current) stored on the batteries will be converter into AC (Alternating Current). So to get electricity with a maximum power capacity of 150 watts 220V. The output of this service is the creation of energy independence and community service. Keywords: electrical energy; kinetic turbine; direct current; alternating current.
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3

Liu, Zhenling. "ARTICLE CITATION CONTRIBUTION INDICATOR: APPLICATION IN ENERGY AND ENVIRONMENT." Ecofeminism and Climate Change 3, no. 2 (2022): 81–84. http://dx.doi.org/10.26480/efcc.02.2022.81.84.

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Анотація:
Journal Impact Factor (JIF) is a widely used and accepted indicator for measuring journal influence in academia, but it has certain limitations. Article Citation Contribution Indicator (ACCI) is defined and introduced in bibliometrics analysis. The ACCI, a new basic indicator, was adopted to analyze the papers published between 2019 and 2020 in Energy & Environment, papers with ACCI>0 and with ACCI<0 were classified into two groups. This paper employed the keyword co-occurrence technology to discover the commonalities of citation positive and citation negative papers. Citation positive papers made relatively a larger contribution to the JIF and might contain important scientific information, subsequent papers may learn from the research directions of these papers, while the citation negative papers failed to improve the performance of the journal in terms of JIF. The research showed that ACCI is an academic tool that can be used to guide scientific directions; the work flow can be used for other journal analysis. The academic journal editorial board can use it to identify potential high influence authors
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4

Brandon, Amanda E., Ella Stuart, Simon J. Leslie, Kyle L. Hoehn, David E. James, Edward W. Kraegen, Nigel Turner, and Gregory J. Cooney. "Minimal impact of age and housing temperature on the metabolic phenotype of Acc2−/− mice." Journal of Endocrinology 228, no. 3 (December 14, 2015): 127–34. http://dx.doi.org/10.1530/joe-15-0444.

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Анотація:
An important regulator of fatty acid oxidation (FAO) is the allosteric inhibition of CPT-1 by malonyl-CoA produced by the enzyme acetyl-CoA carboxylase 2 (ACC2). Initial studies suggested that deletion of Acc2 (Acacb) increased fat oxidation and reduced adipose tissue mass but in an independently generated strain of Acc2 knockout mice we observed increased whole-body and skeletal muscle FAO and a compensatory increase in muscle glycogen stores without changes in glucose tolerance, energy expenditure or fat mass in young mice (12–16 weeks). The aim of the present study was to determine whether there was any effect of age or housing at thermoneutrality (29 °C; which reduces total energy expenditure) on the phenotype of Acc2 knockout mice. At 42–54 weeks of age, male WT and Acc2−/− mice had similar body weight, fat mass, muscle triglyceride content and glucose tolerance. Consistent with younger Acc2−/− mice, aged Acc2−/− mice showed increased whole-body FAO (24 h average respiratory exchange ratio=0.95±0.02 and 0.92±0.02 for WT and Acc2−/− mice respectively, P<0.05) and skeletal muscle glycogen content (+60%, P<0.05) without any detectable change in whole-body energy expenditure. Hyperinsulinaemic–euglycaemic clamp studies revealed no difference in insulin action between groups with similar glucose infusion rates and tissue glucose uptake. Housing Acc2−/− mice at 29 °C did not alter body composition, glucose tolerance or the effects of fat feeding compared with WT mice. These results confirm that manipulation of Acc2 may alter FAO in mice, but this has little impact on body composition or insulin action.
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Ramadhan, Arief Dwi, Rahmat Hidayat, and Lela Nurpulaela. "IMPLEMENTASI SENSOR PHOTOCELL DAN PENANGKAL PETIR PADA PRODUK UMBRELLA ENERGY." Electro Luceat 6, no. 2 (November 4, 2020): 366–72. http://dx.doi.org/10.32531/jelekn.v6i2.281.

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Анотація:
Pada pemanfaatan payung multifungsi menggunakan Panel Surya dengan Sensor Photocell, atau dikenal dengan istilah Umbrella Energy merupakan salah satu energy terbarukan dengan memanfaatkan sinar matahari yang menghasilkan sebuah energy listrik, dimana panel surya dan baterai dapat menkonversikan sebuah energy listrik. Kekuatan daya pada baterai dapat menyimpan sebuah energy dengan merubah arus DC atau AC, sebuah payung multifungsi diberi panel surya untuk menyerap energy cahaya matahari sebagai pusat charger handphone sekaligus tempat untuk bersantai. Payung multifungsi ini sudah di desaign dan di modifikasi pada bagian atap payung duntuk menyerap cahaya matahri. Dalam penelitian ini, digunakan 3 Panel Surya dengan kapasitas 30 WP, yang mana energi yang dihasilkan Panel Surya tersebut kemudian disimpan dalam baterai (accu) dengan kapasitas 12 volt 20 Ah. Inverter yang digunakan dalam penelitian ini berkapasitas 300 watt sebagai pengubah tegangan DC 12 volt ke AC 220 volt, yang kemudian akan digunakan sebagai sumber energi listrik.
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Diantoro, M., I. Luthfiyah, Istiqomah, H. Wisodo, J. Utomo, and Worawat Meevasana. "Electrochemical Performance of Symmetric Supercapacitor Based on Activated Carbon Biomass TiO2 Nanocomposites." Journal of Physics: Conference Series 2243, no. 1 (June 1, 2022): 012077. http://dx.doi.org/10.1088/1742-6596/2243/1/012077.

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Abstract A supercapacitor (SC) is an energy storage device with high energy density, high power density, long life cycle and a bundant material in nature.. Activated carbon based on coconut shell waste (ACCS) is one of the most promising supercapacitor base materials due to its abundance in nature, environmentally friendly, and high surface area. Activated carbon based on coconut shell (ACCS) waste is a potential material as a supercapacitor base material. This is because ACCS has undergone chemical and physical activation, has a high surface area, is abundant in nature, and is environmentally friendly. However, ACCS has common ionic transport diffusion, resulting in inefficient utilization of activated carbon surface area. Therefore, ACCS composite with TiO2 material is needed. TiO2 material with a small particle size can be used to reduce the aggregation so it can increase the electrolyte to an active redox site. Therefore, this research was conducted to obtain information about the most optimum activation method for ACCS biomass and the supercapacitors enhancement with ACCS-TiO2 composite to obtain great ionic diffusion performance and an effective surface area utilization. In brief, the experiment was started by preparing the composite solutions with various compositions of TiO2 (0%, 10%, 15%, and 20%). The deposition was carried out using the doctor blade technique on the aluminum foil based substrate and the liquid electrolyte of 1 M Et4NBF4 was injected between the electrodes. The crystal structure, morphology, and elemental analysis of the composite were identified using X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM), and Energy Dispersive X-ray (EDX), respectively. Charge Discharge was applied to measure the electrical performance of the device. The highest performance of symmetric supercapacitor was performed by TiO2 15% that able to show its cyclic reversibility at the voltage range of 0-2 V, generated a specific capacitance of 53.10 F g-1 with the power density and maximum energy density of 367.05 W kg-1 and 26.15 Wh kg-1, respectively. Over 50 cycles, its maximum energy density was decreased to 24.83 Wh kg-1 with the capacity retention of 94.64 %.
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Saipanya, Surin, and Thapanee Sarakonsri. "Preparation and Applications of Precious Metals Adsorbed Activated Carbon Cloth." Advanced Materials Research 93-94 (January 2010): 296–99. http://dx.doi.org/10.4028/www.scientific.net/amr.93-94.296.

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Анотація:
Precious metal nanoparticles (e.g. Au, Pd and Pt) on activated carbon cloths (ACCs) were simply prepared by impregnation of metal salts dissolving in ethanol solution. Pretreatment of the ACCs was firstly performed in hydrochloric acid solution and nitric acid as oxidizing agent was employed in order to introduce oxygen complex on the ACCs fiber surfaces. Uniformly dispersed metal nanoparticles with diameter of 5-20 nm on the ACC surfaces were simply achieved without using reducing agents. Morphology and composition of the metal adsorbed ACCs were examined by Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS), respectively. Electrolytic activity of metal/ACCs was investigated by using cyclic voltammetry (CV) to demonstrate the electron-transfer properties. Results demonstrate that metals adsorbed ACCs were easily prepared with simple procedures which will be more convenient for preparations and applications.
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Huang, Wenhui, Lei Chen, Lijun Yang, and Xiaoze Du. "Energy-Saving Strategies of Axial Flow Fans for Direct Dry Cooling System." Energies 14, no. 11 (May 28, 2021): 3176. http://dx.doi.org/10.3390/en14113176.

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Анотація:
The operating conditions of axial flow fans are closely related to the thermo-flow characteristics of the mechanical draft direct dry cooling system. Moreover, the uneven distribution of cooling air driven by axial flow fans may lead to the deterioration of the heat transfer capacity of air-cooled condensers (ACCs). Therefore, developing energy-saving operating methods for axial flow fans is very meaningful. In this work, two kinds of adjustment strategies to make the flow field more uniform are proposed for a 2 × 300 MW direct dry cooling power-generating unit. The performance of ACCs in the prevailing wind direction is predicted with the help of the macro heat exchanger model. It is found that the inlet air temperatures of fans are significantly reduced by proposed strategies, especially at high wind speeds. Moreover, the minimum cooling air can meet the cooling demand of ACCs for the strategy which made the air flow rates of all fans consistent. Compared with the case without adjustment of fans, the total power consumption of the fan array was cut down effectively, up to 13.94% at the wind speed of 12 m/s. In conclusion, the energy efficiency of ACCs can be improved by the uniform flow field.
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Schultz, Kyle A., Benjamin A. Westcott, Kimberly R. Barber, and Todd A. Sandrock. "Elevated 1-Year Mortality Rate in Males Sustaining Low-Energy Proximal Femur Fractures and Subgroup Analysis Utilizing Age-Adjusted Charlson Comorbidity Index." Geriatric Orthopaedic Surgery & Rehabilitation 11 (January 1, 2020): 215145931989864. http://dx.doi.org/10.1177/2151459319898644.

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Анотація:
Introduction: Low-energy proximal femur fractures are common in the aging population and the ability to identify patients at increased mortality risk provides surgeons information to improve informed decision-making with patients and families. We evaluated for gender differences in 1-year mortality after sustaining low-energy proximal femur fractures with subgroup analysis to identify the impact of fracture location, age, and comorbidities on mortality. Materials and Methods: Patients ≥40 years of age sustaining a low-energy proximal femur fracture identified at our institution between January 1, 2014, and December 31, 2017. International Classification of Diseases, Ninth Revision and International Classification of Diseases, Tenth Revision codes were used to identify comorbidities for calculation of the age-adjusted Charlson comorbidity index (ACCI). The county clerk database was searched to identify mortality within 1 year of injury. One-year mortality rates were calculated and multiple comparisons were made between genders controlling for age, fracture location, and/or ACCI. Results: Women presented with low-energy proximal femur fractures at a rate of almost 3:1 to men at our institution ( P = .001). Men demonstrated a significantly increased ACCI at presentation (5.35 ± 2.55 vs 4.86 ± 1.77, P = .03). Men had an increased 1-year mortality rate for all (31.3% vs 21.5%, P = .004) and intertrochanteric (IT) fractures (36.2% vs 22.9%, P = .008). Controlling for ACCI, gender, and fracture location, men demonstrated increased mortality rate with IT fractures ( P = .002) and trended toward but did not reach significance with femoral neck fractures ( P = .07). Discussion: Men presenting with low-energy femur fractures are at an increased mortality risk compared to women. On average, men present with an overall worse health status as identified by ACCI, which could predispose these patients not only to fractures themselves but also impair their ability to recover from injury. Conclusion: Men are at an increased 1-year mortality risk after sustaining proximal femur fractures.
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Firdaus, Hendra, Endang Rustendi, and Ade Herdiana. "ANALISIS KONSUMSI ARUS LISTRIK PADA MOBIL MULTI PURPOSE VEHICLE." Jurnal Ilmiah Teknologi Infomasi Terapan 8, no. 1 (December 15, 2021): 150–58. http://dx.doi.org/10.33197/jitter.vol8.iss1.2021.736.

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Анотація:
Mobil tidak terbatas hanya pada mesin, namun juga berhubungan dengan sistem kelistrikan untuk menjalankan fungsinya. Listrik diperlukan untuk proses pembakaran yang terdapat pada mobil. Untuk menyimpan sumber energi listrik diperlukan Accu. Arus yang berasal dari Accu yaitu arus searah atau arus DC (Alternating Current) tegangan 12 Volt. Fungsi Accu antara lain; Pada saat mesin mati, Accu berfungsi sebagai sumber tenaga listrik yang berfungsi untuk menghidupkan sistem kelistrikan yang ada pada kendaraan, misalnya lampu sein (lampu tanda belok), klakson (horn), indikator yang ada pada dashboard, lampu kota, lampu kepala dan lain sebagainya. Pada saat mesin masih belum hidup, Accu merupakan sumber tenaga listrik satu-satunya yang digunakan, karena pada saat ini altenator pada kendaraan belum berfungsi. Pada saat melakukan starter menggunakan elektrik starter, baterai juga merupakan satu-satunya sumber listrik yang digunakan untuk menghidupkan atau menjalankan motor starter. Pada saat mesin sudah hidup, maka altenator pada kendaraan sudah berfungsi, sehingga baterai sudah tidak lagi menjadi sumber utama penyedia energi listrik. Namun pada saat mesin hidup baterai masih memiliki fungsi yaitu sebagai penstabil tegangan dari alternator. Mengingat kerja altenator kurang stabil dan bergantung dengan putaran altenator, walaupun pada alternator sudah dilengkapi dengan regulator namun masih memerlukan baterai sebagai penstabil tegangan, tegangan tersebut dialirkan ke sistem kelistrikan yang ada pada kendaraan. Di Indonesia mobil yang jumlah penumpang rata-rata mampu memuat 6 sampai 7 penumpang, adalah jenis MPV merupakan singkatan dari Multi Purpose Vehicle. Penelitian dilakukan pada salah satu jenis mobil MVP yaitu mobil merk Avanza. Sumber listrik utama yang dipakai pada mobil Toyota Avanza yaitu Accu 12 Volt 32 Ah. Dari hasil pengukuran dan perhitungan pada kelistrikan mobil dapat ditarik kesimpulan bahwa dengan sumber listrik utama Accu 12V/32Ah mampu memberi kebutuhan Arus Listrik ke semua beban dengan total arus 102,5 A selama 0,31h sebelum Accu kosong kembali
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Більше джерел

Дисертації з теми "Energy acce"

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Enobun, Ernest. "'Quota measures' and 'trade-related investment measures' in oil and gas regulation : reconciling normative conflicts between energy-focused regimes and WTO rules on energy." Thesis, University of Dundee, 2016. https://discovery.dundee.ac.uk/en/studentTheses/17ddd863-cc94-4e01-ac8e-a32880d8047a.

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Анотація:
Regulation of border and behind-the-border measures in the oil and gas sectors presents the ‘resource access’ challenge with immense economic ramifications for export markets, yet their status under the multilateral trading regime remains obscure. Recent developments that could reshape the trading regime and market dynamics for oil and gas have seen the call for a global energy governance gain momentum in recent years. But the complex relationships between national laws, institutional norms, and the multilateral trading regime regulating energy presents an ideological ‘conflict in applicable law’. They reveal a conflict between regulatory privileges enshrined in energy resource-focused institutions namely: OPEC as a producer-only treaty, the ECT as a sector-specific multilateral energy treaty, national energy laws on the heel of the PSNR principle as a customary international law; versus international obligations under the GATT rules relevant to energy. These regimes have the trappings of nationalism, regionalism, and institutionalism in energy regulation, thereby creating an ambiguous path to global energy governance. This research revisits the institutional and regulatory architecture of oil and gas regimes from the perspective of quota measures and trade-related investment measures (TRIMs) implemented through the instrumentality of national laws, acts of NOCs (in the oil sector) and acts of non-state undertakings (in the gas sector). It therefore charts an uncommon territory and brings a new dimension to the discipline of energy and trade, with a robust examination of how regulation of quota measures and trade-related investment in the oil sector (with export restriction issues) differs from their regulation in the gas sector (with underlying competition issues) and how their varying trade effects shape their future in international economic law. Given the inherent conflicts between the legal, policy, and regulatory design of these regimes governing energy, this research first explores and applies the principle of conflict of norms to energy governance. This paves way for a hands-on approach to examining the applications of these measures under the auspices of these regimes aimed at a ‘co-operative energy governance’ between the resource-focused regimes and the GATT rules relevant to energy on the basis of their trade effects. I argue that an understanding of ‘quota measures’ and ‘TRIMs’ in the oil sector compared to their implementations in the gas sector is compelling in making a case for a systemic energy cooperation that would serve economic interests of all affected states without diminishing the normative value of each regime in each sector.
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Silva, Junior Herculano Xavier da. "Aplicação das metodologias de analise estatistica e de Analise do Custo do Ciclo de Vida (ACCV) para o estabelecimento de padrões de eficiencia energetica : refrigeradores brasileiros." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264675.

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Анотація:
Orientadores: Gilberto de Martino Jannuzzi, Guilherme de Castilho Queiroz
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
Made available in DSpace on 2018-08-05T03:48:17Z (GMT). No. of bitstreams: 1 SilvaJunior_HerculanoXavierda_M.pdf: 14025317 bytes, checksum: 59bfdc3617f3d431b323aaa39f4fe0a5 (MD5) Previous issue date: 2005
Resumo: o objetivo desta dissertação é discutir a aplicação das metodologias de Análise do Custo do Ciclo de Vida (ACCV) e de Análise Estatística como ferramentas para propor padrões de eficiência energética, complementares às etiquetas (selos) voluntárias já existentes, nos refrigeradores brasileiros de uma porta. Um outro objetivo é estudar o papel desses instrumentos (Selos e Padrões de Eficiência Energética) como meios de fornecer subsídios técnicos para o estabelecimento de níveis máximos de consumo de energia elétrica para equipamentos consumidores de eletricidade comercializados no Brasil. As metodologias ACCV e Análise Estatística permitem avaliar os impactos do aumento de eficiência energética nesses equipamentos, resultando em economias (de energia, financeiras, redução na emissão de dióxido de carbono, etc.) importantes para os consumidores e para o País. Os resultados alcançados nesse estudo apresentam importantes dados para subsidiar discussões mais aprofundadas com os fabricantes e governo para estipular padrões mínimos de eficiência energética para os refrigeradores brasileiros. Uma das importantes conclusões é que, apesar de existirem outras metodologias como a Análise Estatística, a ACCV que leva em conta os custos tecnológicos permite que se conheça melhor o mercado (custos, capacidades tecnológicas, etc.) e sugere os melhores Padrões Mínimos de Eficiência Energética (MEPS - Minimum Energy Performance Standards) com o máximo retomo econômico para o consumidor. Contudo, quando não é possível coletar todos os dados exigidos para a aplicação da ACCV, recorre-se a uma análise mais simplificada, ou seja, à metodologia de Análise Estatística
Abstract: The objective ofthis thesis is to discuss the application of the methodologies of Life Cycle Cost Analysis(LCCA) and of Statistical Analysis as tools to propose energy efficiency standards, complementally to the voluntary labels already existent in the Brazilian one-door refrigerators. Another objective is to study the role of these instruments (energy efficiency labels and standards) in order to seek technical subsidies for the establishment of maximum level of electric energy consumption for electrical equipments in Brazil. The LCCA and Statistical Analysis methodologies permit to evaluate the impacts of the energy efficiency increase in electrical equipments commercialized in Brazil, resulting in important savings (energy, financial, carbon dioxide emissions avoided etc) for the country and its citizens. The results of this study offer important data to subsidize deeper discussions with manufacturers and the govemment to stipulate minimum energy efficiency standards for the Brazilian refrigerators. One of the important conclusions is that, even though there are other methodologies, such as the Statistical Analysis which does not take technological costs into account, the LCCA allows to better understand the market (costs, technological capacity etc) and suggests the best MEPS (Minimum Energy Performance Standards) with the maximum economic retum for the consumer. Nevertheless, when it is not possible to collect all the necessary data to apply the LCCA, it can be used a more simplified analysis, such as the Statistical Analysis methodology
Mestrado
Mestre em Planejamento de Sistemas Energéticos
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3

Hrachiar, Róbert. "Porovnání klasického AlFe vedení s technologiemi ACCC." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-377144.

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Анотація:
The diploma thesis deals with the comparison of the conduction with the classic "AlFe" ropes (ACSR technology - aluminium conductor steel reinforced) and the line with the ACCC technology (aluminum core composite core). The first part describes the development of the transmission and distribution network in the Czech Republic. Subsequently types of conductors are described, its construction and main characteristics. The theoretical part also consists of theoretical knowledge about compared types of conductors and knowledge from the field of external lines. During the creation of the theoretical part of the thesis, we gained experience in the advanced functions of Excel, which are later used in practical part. The practical part of the thesis consists of creation of the calculation program itself, instructions and calculation methodology. Included is also an example of use of the program that compars two types of conductors of the same diameter, the same transmitted current and the same weight per unit length.
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Santos, Francisco Eulalio Alves dos. "Desenvolvimento e instalação de um cogerador compacto no campus da Universidade Federal do Acre." [s.n.], 2001. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264769.

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Анотація:
Orientadores: Carlos Alberto Luengo, Jose Luz Silveira
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
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Resumo: O emprego de motores alternativos a Diesel para geração apenas de energia elétrica é bastante difundido em todas as regiões do Brasil, principalmente no atendimento de emergência em hospitais, indústrias, shopping centers, serviços de telefonia, campi universitários e supermercados. Além das situações de emergências, encontram-se no país um grande número de sistemas de geração de eletricidade que asseguram o abastecimento de comunidades isoladas, tendo como destaque a região Norte, onde a potência dos parques térmicos vinculados à ELETRONORTE e às Concessionárias Estaduais é da ordem de 980 MW. A ineficiência desses sistemas, em tomo de 2/3, representa o potencial termodinâmico para implementar a tecnologia da cogeração e, através desta, a possibilidade real para recuperar os desperdícios das plantas termelétricas da região. Nesse contexto, com o propósito de assimilar, difundir e elaborar estudos de viabilidade econômica relativos à tecnologia da cogeração é que estamos apresentando o trabalho de desenvolvimento e instalação de um cogerador compacto no campus da Universidade Federal do Acre - UFAC, em Rio Branco, Acre. O cogerador, com capacidade de 355 kV A, tem como finalidade principal atender parte do suprimento de energia elétrica do campus e, simultaneamente, nesta primeira fase, o aproveitamento do calor residual da descarga do motor será utilizado no suprimento de um sistema de absorção para climatização de ambiente
Abstract: The use of Diesel engines to generate electricity is an ordinary practice in Brazil, mainly for emergency services in hospitals, industries, shopping centers, telephone centrals, universities, and supermarkets. Besides the emergency uses, there are a large number of thermoelectric systems spread in the country to supply isolated communities. In the North and part of Mid-West Regions in Brazil, the installed thermoelectric capacity is about 980 MW. It is managed by ELETRONORTE and state electric power companies. This system inefficiency is an average of two thirds of the fuel heating value and it represents the thermodynamic potential of the producers. The real possibility to recover the energy waste in those thermoelectric plants throught cogeneration technology is the big motivation in this research. The cogenerated energy will supply the tertiary sector. Here, it is presented a cogeneration study and a pilot plant development. The compact cogeneration is installed at the UF AC (Acre Federal University) in Rio Branco, ACRE. Its capacity is 355 kV A and it aims to recover part of the residual heat from a Diesel engine exhaust. It produces cool air to be used in a air conditioning system. This first step is assessed in terms of its economic viability
Doutorado
Doutor em Planejamento de Sistemas Energéticos
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Pedroso, Gilson Marafiga. "Avaliação de Ciclo de Vida Energético (ACVE) de sistemas de vedação de habitações." reponame:Repositório Institucional da UnB, 2015. http://repositorio.unb.br/handle/10482/20953.

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Анотація:
Tese (doutorado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Civil e Ambiental, 2015.
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O estudo da Energia Incorporada (EI) no contexto das pesquisas sobre sustentabilidade na cadeia produtiva da construção tem contribuído ainda de forma incipiente no meio científico e tecnológico do país. A partir de estudos de Avaliação de Ciclo de Vida (ACV), tem-se desenvolvido estratégias de otimização das etapas complexas que essa requer, através da Avaliação de Ciclo de Vida Energético (ACVE). Este trabalho buscou discutir a ACVE nas etapas de pré-uso, uso e manutenção e desconstrução de um projeto típico de habitação térrea para o Distrito Federal no Brasil, de 45,64 m², abordando os sistemas de vedação vertical internos e externos. As vedações abordadas foram parede de concreto moldadas no local, alvenaria estrutural de blocos de concreto, steel frame e convencional. Buscou-se também realizar ensaios com a finalidade de obter a EI para a fase de desconstrução, abordando também a EI dos resíduos. Como resultados, verificou-se que as vedações em alvenaria estrutural apresentaram menor EI total. Em todas as situações, a etapa de desconstrução comportou-se como sendo a de menor EI, representando em média 1% da EI total. A etapa de uso e manutenção teve a maior EI para os sistemas abordados. Já a etapa de pré-uso teve maior EI para dois sistemas, sendo as vedações de painéis de concreto com apenas uma utilização das fôrmas e as vedações em steel frame, o qual apresentou no conjunto das três etapas a maior EI total. A partir da análise dos resíduos das vedações na etapa de desconstrução, encontraram-se resultados de que os resíduos podem representar de 6 (seis)% até 11 (onze)% da EI total. Os estudos mostraram que nas condições específicas da pesquisa, os valores para EI total para as vedações foram de 13,17 GJ/m² até 31,99 GJ/m². ________________________________________________________________________________________________ ABSTRACT
The study of embodied energy (EE) in the research context of sustainability on the construction supply chain has contributed for science and technology in Brazil, but the researches are still incipient. Based on studies on Energy Life Cycle Assessment (Energy LCA), some strategies to optimize the complex phases of Life Cycle Assessment (LCA) have been developed. This work discuss Energy LCA in the pre-use, use as well as demolition phases of a typical project of a social housing of one story of 45,64 m² in Distrito Federal, situated in Brazil. The thesis addresses internal and external walls. They addressed walls were concrete wall molded-in-place, structural masonry of concrete block, steel frame and traditional masonry. Tests were made to obtain the EE in the demolition phase, addressing EE of remnants. As a result, it was possible to verify that the structural masonry wasted less total EE than the others. In every analyzed situation, the demolition phase was the one that wasted less EE, representing 1% of the total EE. The use phase consumed the most part of the EE. The pre-use phase consumed the most part of the EE for concrete wall when it uses just one form and for steel frame which presents the higher spending of total EE throughout the three phases. Based on the analyze of the remnants of the internal and external walls in the demolition stage, the remnants can represent from 6% to 11% of total EE.The studies indicated that the amount of total EE for internal and external walls were from 13,17 GJ/m² to 31,99 GJ/m², at the specific conditions of this research.
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Baltruschat, Anne. "Adoption of high-technology products in emerging markets: The ACE-1 advanced biomass cookstove in rural Cambodia." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-376473.

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This study examines the adoption of clean cooking technologies in developing countries with a focus on the ACE-1 advanced biomass stove (ABS). Marginalized communities in rural environments are often exposed to high levels of Household Air Pollution (HAP) due to the common use of traditional cookstoves. The United Nations (UN) has recognized the adoption of clean cooking technology like the ABS as a key driver and high-impact opportunity in the context of the 2030 Agenda for Sustainable Development. Nonetheless, the context for adoption is complex. Adoption depends on numerous variables, that can enable or hinder the uptake of modern cookstoves. This study is based on the assumption, that adoption starts with the decision-making process and acquisition of the stove. Based on a field study in rural Cambodia, this research focuses on users at the initial stage of adoption. By means of questionnaire-based interviews, this study identifies how variables related to ‘fuel and technology’ and ‘household and setting’ affect the likeliness of adoption and what opportunities can be identified to facilitate the process of adoption. The study finds, that ABS-suitable biomass fuels are available and accessible in rural Cambodia. Besides, the production of renewable biomass fuels like pellets is growing, which provides opportunities for collaboration with stove distributors. The study confirms the common practice of stove stacking and points out the strong market presence of Liquefied Petroleum Gas (LPG) stoves. Market activities need to consider these factors and highlight the competitive advantages of AB, namely fuel efficiency and cost savings. Finally, the impact of social influence and peer relations should be further researched and taken into consideration for sales and marketing activities.
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Abdrakhmanov, Rustem. "Sub-optimal Energy Management Architecture for Intelligent Hybrid Electric Bus : Deterministic vs. Stochastic DP strategy in Urban Conditions." Thesis, Université Clermont Auvergne‎ (2017-2020), 2019. http://www.theses.fr/2019CLFAC020/document.

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Cette thèse propose des stratégies de gestion de l'énergie conçues pour un bus urbain électrique hybride. Le système de commande hybride devrait créer une stratégie efficace de coordination du flux d’énergie entre le moteur thermique, la batterie, les moteurs électriques et hydrauliques. Tout d'abord, une approche basée sur la programmation dynamique déterministe (DDP) a été proposée : algorithme d'optimisation simultanée de la vitesse et de la puissance pour un trajet donné (limité par la distance parcourue et le temps de parcours). Cet algorithme s’avère être gourmand en temps de calcul, il n’a pas été donc possible de l’utiliser en temps réel. Pour remédier à cet inconvénient, une base de données de profils optimaux basée sur DP (OPD-DP) a été construite pour une application en temps réel. Ensuite, une technique de programmation dynamique stochastique (SDP) a été utilisée pour générer simultanément et d’une manière optimale un profil approprié de la vitesse du Bus ainsi que sa stratégie de partage de puissance correspondante. Cette approche prend en compte à la fois la nature stochastique du comportement de conduite et les conditions de circulations urbaines (soumises à de multiples aléas). Le problème d’optimisation énergétique formulé, en tant que problème intrinsèquement multi-objectif, a été transformé en plusieurs problèmes à objectif unique avec contraintes utilisant une méthode ε-constraint afin de déterminer un ensemble de solutions optimales (le front de Pareto).En milieu urbain, en raison des conditions de circulation, des feux de circulation, un bus rencontre fréquemment des situations Stop&Go. Cela se traduit par une consommation d'énergie accrue lors notamment des démarrages. En ce sens, une stratégie de régulation de vitesse adaptative adaptée avec Stop&Go (eACCwSG) apporte un avantage indéniable. L'algorithme lisse le profil de vitesse pendant les phases d'accélération et de freinage du Bus. Une autre caractéristique importante de cet algorithme est l’aspect sécurité, étant donné que l’ACCwSG permet de maintenir une distance de sécurité afin d’éviter les collisions et d’appliquer un freinage en douceur. Comme il a été mentionné précédemment, un freinage en douceur assure le confort des passagers
This PhD thesis proposes Energy Management Strategies conceived for a hybrid electrical urban bus. The hybrid control system should create an efficient strategy of coordinating the flow of energy between the heat engine, battery, electrical and hydraulic motors. Firstly, a Deterministic Dynamic Programming (DDP) based approach has been proposed: simultaneous speed and powersplit optimization algorithm for a given trip (constrained by the traveled distance and time limit). This algorithm turned out to be highly time consuming so it cannot be used in real-time. To overcome this drawback, an Optimal Profiles Database based on DP (OPD-DP) has been constructed for real-time application. Afterwards, a Stochastic Dynamic Programming (SDP) technique is used to simultaneously generate an optimal speed profile and related powersplit strategy. This approach takes into account a stochastic nature of the driving behavior and urban conditions. The formulated energy optimization problem, being intrinsically multi-objective problem, has been transformed into several single-objective ones with constraints using an ε-constraint method to determine a set of optimal solutions (the Pareto Front).In urban environment, due to traffic conditions, traffic lights, a bus encounters frequent Stop&Go situations. This results in increased energy consumption during the starts. In this sense, a relevant Eco Adaptive Cruise Control with Stop&Go (eACCwSG) strategy brings the undeniable benefit. The algorithm smooths speed profile during acceleration and braking phases. One more important feature of this algorithm is the safety aspect, as eACCwSG permits to maintain a safety distance in order to avoid collision and apply a smooth braking. As it was mentioned before, smooth braking ensures passengers comfort
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Bochníček, Ondřej. "Vzduchem chlazený kondenzátor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318861.

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This master´s thesis deals with an air cooled condenser. The specific attention is focused on the condenser in the Brno´s waste-to-energy plant SAKO. The general process of calculation of the heat transfer coefficient is introduced, which is the base for the calculation of the condenser´s output. This process is later used for the calculation of a specific condenser. A considerable part of the thesis is concentrated on the analysis of behavior of the condenser of SAKO in various conditions from the theoretical point of view and then also in terms of real operation using provided operational data.
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Kelso, Ross. "Open access to next generation broadband." Thesis, Queensland University of Technology, 2008. https://eprints.qut.edu.au/12663/1/12663a.pdf.

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Wireline telecommunications infrastructure in the customer access network or CAN is undergoing a veritable technological and commercial revolution. The paired-copper CAN is being modernised with optical fibre deployed ever closer to customers, culminating soon with fibre-to-the-home networks or some variant thereof. Although bandwidth ceases to be a scarce commodity, the underlying natural monopoly will most likely be strengthened. National competition policy desires open access to multiple service providers yet commercial pressure calls for closure. This has been the recent experience with the hybrid fibre coaxial networks delivering pay television and Internet access. This research asks the question: What are the factors that prevent open access to the broadband services of next generation wireline infrastructure? How can these obstacles be overcome? A particular focus is given to non-price considerations which come to the fore due to the unique strategic and technological characteristics of optical fibre in the access network. The methodological approach involves data gathering via three case studies - that of the Telstra/Foxtel pay television network, the TransACT broadband network and fibre-to-the-home networks in general. Although the ultimate focus is on the research question above, these cases are discussed in a holistic way with consideration of a number of contextual factors. The research also examines the relationship between the concepts of ‘open access’ and ‘network neutrality’, visiting the concept of ‘common carriage’ in doing so. Several findings are reached that illuminate the field of telecommunications access regulation as applied to infrastructure capable of delivering truly next generation broadband services. Since 1993, our politicians have only paid lip service to the importance of competition and have deferred to the demands of the dominant builder of telecommunications infrastructure. From the viewpoints of end-users and access seekers, the access regime is found to be incapable of dealing with the technical and commercial bottlenecks arising from optical fibre in the CAN. It is concluded that communication between users should be recognised as the prime purpose of telecommunications and that the regulatory regime should not reward discriminatory practices detracting from the development of a networked information economy. It is also concluded that dominant players should never be rewarded with access holidays which could otherwise entrench market dominance through the creation of new bottlenecks. Access regulation is ill-equipped to cope with optical fibre in the CAN until it also recognizes the strategic potential of such infrastructure.
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Vlachou, Charikleia. "La coopération entre les autorités de régulation en Europe (communications électroniques, énergie)." Thesis, Paris 2, 2014. http://www.theses.fr/2014PA020055/document.

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La coopération entre les autorités de régulation en matière de communications électroniques et d’énergie s’inscrit dans le contexte de mutation de l’administration européenne qui est intervenue au fil des deux dernières décennies. Son architecture institutionnelle est marquée par la forte européanisation des autorités de régulation,laquelle est le résultat de l’harmonisation opérée par le droit de l’Union européenne et de la diffusion de meilleures pratiques. La coopération entre les autorités de régulation se fonde néanmoins sur des principes juridiques flous en droit primaire. Elle est de plus marquée par l’ambigüité de la délégation des pouvoirs à l’échelle de l’Union européenne. Dans les deux secteurs étudiés, elle traduit l’hybridation des modèles de gouvernance que sont les « agences de l’Union européenne » et les « réseaux d’autorités », car elle a donné naissance à une « agence en réseau » puissante dans le domaine de l’énergie - l’ACRE- et à un « réseau agenciarisé » faible en matière de communications électroniques– l’ORECE.Pour assurer l’effectivité de l’ « Union de droit », les actes de ces organismes de l’Unioneuropéenne sont contrôlés par le juge de l’Union européenne, dont la saisine par lesparticuliers reste malheureusement difficile. Dans ce contexte, le Médiateur européen présente un potentiel fort en tant qu’instance de contrôle complémentaire. Quant au prétendu déficit démocratique souligné par les détracteurs de l’Union européenne, il est ici démenti car le Parlement européen assure un contrôle démocratique efficace sur les organismes étudiés. Si ses moyens de contrôle politique sont largement informels et méritent d’être approfondis, le contrôle qu’il exerce dans le cadre de la procédure de décharge budgétaire peut, quant à lui, déboucher sur une transformation de l’architecture institutionnelle des organismes étudiés
The cooperation among regulatory authorities in the field of electronic communications and energy takes place against the background of the transformation of the european administration in the last two decades. Its institutional design bears the mark of the europeanisation of regulators through the harmonisation brought about by EU law and the diffusion of best practices. The cooperation among regulatory authorities is formalised on the basis of a primary law that is vague. It is also marked by ambiguity with regard to the delegation of pouvoirs on a European level. In the sectors of energy and electronic communications, it reflects the « hybrisation » of two models of governance, European agencies and networks, giving birth to a powerful « network agency » in the field of energy-the ACER- and a weak « agenciarised network » in the field of electronic communications- the BEREC. The control of the acts of these two organisms in a « Union of law » is ensured by the Cour of justice of the European Union which is, however, difficult to accessfor individuals. In this context, the European Ombudsman demonstrates a real potential as a complementary forum of control. Against a priori hypotheses with respect to the democratic deficit of the European Union, the European Parliament effectively ensures the democratic control of ACER and BEREC. Even if its means of political control are largelyinformal and should be better defined, the control it exercices in the context of the budgetary discharge procedure is capable of transforming the institutional design of the above mentioned organisms
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Книги з теми "Energy acce"

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United States. National Aeronautics and Space Administration., ed. Energy efficient engine: Combustor component performance progam. [Washington, DC: National Aeronautics and Space Administration, 1986.

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2

Office, General Accounting. Water subsidies: Basic changes needed to avoid abuse of the 960-acre limit : report to the chairman, Subcommittee on Water, Power and Offshore Energy Resources, Committee on Interior and Insular Affairs, House of Representatives. Washington, D.C: The Office, 1989.

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3

Office, General Accounting. Water subsidies: Basic changes needed to avoid abuse of the 960-acre limit : report to the chairman, Subcommittee on Water, Power and Offshore Energy Resources, Committee on Interior and Insular Affairs, House of Representatives / United States General Accounting Office. Washington, D.C: The Office, 1989.

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4

San Francisco (Calif.). Office of the Controller. City Services Auditor Division. Board of Supervisors: NRG Energy Center San Francisco LLC owes additional franchise fees for 2003 through 2005. San Francisco: Office of the Controller, 2006.

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5

Division, San Francisco (Calif ). Office of the Controller City Services Auditor. Board of Supervisors: Cody's Books complied with the requirement to not use City funds for political activities. San Francisco: Office of the Controller, 2007.

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6

Division, San Francisco (Calif ). Office of the Controller City Services Auditor. Board of Supervisors: Political activity audit : HomeBase, The Center for Common Concerns. San Francisco: Office of the Controller, 2006.

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Division, San Francisco (Calif ). Office of the Controller City Services Auditor. Board of Supervisors: Southeast Asian Community Center did not use City funds for political purposes. San Francisco: Office of the Controller, 2005.

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Division, San Francisco (Calif ). Office of the Controller City Services Auditor. Board of Supervisors: Florence Crittenton Services did not use City funds for political purposes. San Francisco: Office of the Controller, 2005.

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9

Division, San Francisco (Calif ). Office of the Controller City Services Auditor. Board of Supervisors: A review of Comcast Corporation's franchise fee payments, July 1, 2000, through December 31, 2002. San Francisco: Office of the Controller, 2004.

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10

Division, San Francisco (Calif ). Office of the Controller City Services Auditor. Board of Supervisors: Triage Consulting Group did not use City funds for political purposes. San Francisco: Office of the Controller, 2007.

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Частини книг з теми "Energy acce"

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Zhang, Jing, and Rangachar Kasturi. "Character Energy and Link Energy-Based Text Extraction in Scene Images." In Computer Vision – ACCV 2010, 308–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-19309-5_24.

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Vogel, Christoph, Patrick Knöbelreiter, and Thomas Pock. "Learning Energy Based Inpainting for Optical Flow." In Computer Vision – ACCV 2018, 340–56. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20876-9_22.

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Li, Xiang, Yasushi Makihara, Chi Xu, Daigo Muramatsu, Yasushi Yagi, and Mingwu Ren. "Gait Energy Response Function for Clothing-Invariant Gait Recognition." In Computer Vision – ACCV 2016, 257–72. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-54184-6_16.

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Wang, LingFeng, Zeyun Yu, and ChunHong Pan. "Medical Image Segmentation Based on Novel Local Order Energy." In Computer Vision – ACCV 2010, 148–59. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-19309-5_12.

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Doan, Khoa D., Sarkhan Badirli, and Chandan K. Reddy. "Unified Energy-Based Generative Network for Supervised Image Hashing." In Computer Vision – ACCV 2022, 527–43. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-26351-4_32.

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Park, Jaeyoon, and Sunggu Lee. "Energy-Efficient Image Processing Using Binary Neural Networks with Hadamard Transform." In Computer Vision – ACCV 2022, 512–26. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-26348-4_30.

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Samsidar, Anwar, and Shafiquzzaman Siddiquee. "Acetylcholinesterase (AChE) Biosensors for Determination of Carbamate Pesticides." In Nanotechnology: Applications in Energy, Drug and Food, 361–75. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-99602-8_18.

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Tan, Huachun, and Yu-Jin Zhang. "An Energy Minimization Process for Extracting Eye Feature Based on Deformable Template." In Computer Vision – ACCV 2006, 663–72. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11612704_66.

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Wang, Zijia, Wenbin Yang, Zhisong Liu, Qiang Chen, Jiacheng Ni, and Zhen Jia. "Gift from Nature: Potential Energy Minimization for Explainable Dataset Distillation." In Computer Vision – ACCV 2022 Workshops, 240–55. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-27066-6_17.

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Xu, Chi, Yasushi Makihara, Xiang Li, Yasushi Yagi, and Jianfeng Lu. "Speed Invariance vs. Stability: Cross-Speed Gait Recognition Using Single-Support Gait Energy Image." In Computer Vision – ACCV 2016, 52–67. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-54184-6_4.

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Тези доповідей конференцій з теми "Energy acce"

1

Maulbetsch, John S., Michael N. DiFilippo, and Joseph O’Hagan. "Effect of Wind on Air-Cooled Condenser Performance." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63157.

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This paper documents the results of a field tests to determine the effect of wind on the performance of air-cooled condensers (ACCs) at power plants. Continuous measurements of wind speed, wind direction, cell inlet temperature and air flow and plant operating variables were made for several days at the El Dorado Energy Center. ACC performance was shown to be affected both by hot air recirculation and by fan performance degradation. Average recirculation, defined as the difference between the average cell inlet temperature and the far-field inlet temperature, was usually less than 3 °F. Occasional excursions to 4 to 10 °F were noted. Fan performance degradation is more difficult to quantify or generalize. Under low wind conditions this was typically close to the design value. The reduction in air flow, estimated from inlet velocity measurements would sometimes exceed 60 to 70% of the average flow in cells near the edge of the ACC during high wind conditions. Fan performance degradation appears to be the more important mechanism. Comparisons with flow modeling results support design recommendations for suppressing unfavorable flow patterns under the ACC.
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2

Marynets, K. "Study of the Antarctic Circumpolar Current via the Shallow Water Large Scale Modelling." In Floating Offshore Energy Devices. Materials Research Forum LLC, 2022. http://dx.doi.org/10.21741/9781644901731-11.

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Abstract. This paper proposes a modelling of the Antarctic Circumpolar Current (ACC) by means of a two-point boundary value problem. As the major means of exchange of water between the great ocean basins (Atlantic, Pacific and Indian), the ACC plays a highly important role in the global climate. Despite its importance, it remains one of the most poorly understood components of global ocean circulation. We present some recent results on the existence and uniqueness of solutions of a two-point nonlinear boundary value problem that arises in the modeling of the flow of the (ACC) (see discussions in [4-9]).
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3

Caillard, Fred, and Francois Screve. "A New Non-Invasive Air-Cooled Condenser Monitoring Methodology to Increase Performance." In 13th Annual North American Waste-to-Energy Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/nawtec13-3166.

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Air-Cooled Condenser performance can significantly affect WTE plants bottom-line. Most of the possible ACC performance improvement solutions require some important capital costs (fin tubes replacement, fans blades or motor upgrade, additional ACC cells, addition of preventive air re-circulation panels, etc…). A new low cost tool and methodology is now allowing to gain a very detailed understanding of ACC behaviours and to optimize ACC operations and cleaning schedules. This article is illustrated by the case-study of a WTE located in the south of France (equipped with a 5.5 MW GE condensing turbine), where the facility performance was strongly limited by its ACC, and where additional turbine generator output of more than 1 MW were achieved.
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4

Etingov, P. V., N. Zhou, Y. V. Makarov, J. Ma, R. T. Guttromson, B. A. McManus, and C. Loutan. "Possible improvements of the ACE diversity interchange methodology." In Energy Society General Meeting. IEEE, 2010. http://dx.doi.org/10.1109/pes.2010.5590067.

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5

Xie, Chen, Daniele Jahier Pagliari, Andrea Calimera, Enrico Macii, and Massimo Poncino. "ACME: An Energy-Efficient Approximate Bus Encoding for I2C." In 2021 IEEE/ACM International Symposium on Low Power Electronics and Design (ISLPED). IEEE, 2021. http://dx.doi.org/10.1109/islped52811.2021.9502495.

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6

Bull, Diana, and Ann Dallman. "Wave Energy Prize Experimental Sea State Selection." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-62675.

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A detailed methodology was used to select the sea states tested in the final stage of the Wave Energy Prize (WEPrize), a public prize challenge sponsored by the U.S. Department of Energy [1]. The winner was selected based on two metrics: a threshold value expressing the benefit to effort ratio (ACE metric) and a second metric which included hydrodynamic performance-related quantities (HPQ). HPQ required additional sea states to query aspects of the techno-economic performance not addressed by ACE. Due to the nature of the WEPrize, limited time was allotted to each contestant for testing and thus a limitation on the total sea states was required. However, the applicability of these sea states was required to encompass seven deployment locations representative of the United States West Coast and Hawaii. A cluster analysis was applied to scatter diagrams in order to determine a subset of sea states that could be scaled to find the average annual power flux at each wave climate for the ACE metric. Four additional sea states were selected, including two highly energetic sea states and two bimodal sea states, to evaluate HPQ. These sea states offer a common experimental testing platform for performance in United States deployment climates.
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7

Mikhaylov, Konstantin. "Accelerated Connection Establishment (ACE) mechanism for Bluetooth Low Energy." In 2014 IEEE 25th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC). IEEE, 2014. http://dx.doi.org/10.1109/pimrc.2014.7136362.

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8

Hunziker, Kenneth J., Jenna Pang, Mike Pereira, Matthew Melis, and Mostafa Rassaian. "NASA ACC High Energy Dynamic Impact Methodology and Outcomes." In 2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2018. http://dx.doi.org/10.2514/6.2018-1700.

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9

Chen, Kai, Xin Xie, Yan Chu, Meng Leng, Jinyi Zhang, Zhenwei Xu, Feng Huang, and Heming Zhang. "Heat Transfer Coefficient Predictions of the Air-Cooled Condenser With Machine Learning Based on the Operation Big Data of the Power Plant." In ASME 2022 Heat Transfer Summer Conference collocated with the ASME 2022 16th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/ht2022-83767.

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Abstract The optimal operation of the air-cooled condenser (ACC) is crucial to the thermal efficiency of the power plant, where the heat transfer capacity of the ACC plays the fundamental role. However, the heat transfer coefficient (HTC) of the ACC is usually unknown due to its complexity under the real operation conditions, and therefore the operation of the ACC relies on the operator’s experience. Here prediction models of HTC of the ACC incorporating the heat transfer mechanisms and the machine learning algorithms are proposed. Approximately 1200 thousand of data records from a thermal power plant of China are reduced and used to train the models. Machine learning algorithms, such as Gaussian Process Regression (GPR), XGBoost (XGB), Multilayer Perceptron (MLP) and Support Vector Machines (SVM) are applied to build the models, which are all evaluated with the records in the test dataset. 17 parameters are treated as the features to train the HTC prediction models. Predictions with all the algorithms reach the level of engineering applications (MAPE &lt; 0.060, R2 &gt; 0.930, δ &gt; 0.930), where XGB performs the best (MAPE = 0.042, R2 = 0.962, δ = 0.972). The feature importance and the correlations among all the parameters are analyzed. The effects of the ACC heat exchanger locations on the heat transfer are also studied based on the variations of the feature importance. In addition, the prediction model of the ACC fan rotation speed ω is studied as well, which is not as good as the HTC prediction model as ω prediction is an inverse problem. This work will benefit the thermal efficiency improvement of the power plant with the historical operating data with low cost.
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10

Misawa, Takeharu, Hiroyuki Yoshida, Hidesada Tamai, and Kazuyuki Takase. "Numerical Analysis of Heat Transfer Test of Supercritical Water in a Tube Using the Three-Dimensional Two-Fluid Model Code." In 16th International Conference on Nuclear Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/icone16-48690.

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The three-dimensional two-fluid model analysis code ACE-3D is developed in Japan Atomic Energy Agency for the thermal design procedure on two-phase flow thermal-hydraulics of light water-cooled reactors. In order to perform thermal hydraulic analysis of SCWR, ACE-3D is enhanced to supercritical pressure region. As a result, it is confirmed that transient change in subcritical and supercritical pressure region can be simulated smoothly using ACE-3D, that ACE-3D can predict the results of the past heat transfer experiment in the supercritical pressure condition, and that introduction of thermal conductivity effect of the wall restrains fluctuation of wall.
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Звіти організацій з теми "Energy acce"

1

Chaudhary, Aashish. Accelerated Climate Modeling for Energy (ACME) Final Scientific/Technical Report. Office of Scientific and Technical Information (OSTI), October 2017. http://dx.doi.org/10.2172/1399702.

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2

McClean, Julie. Accelerated Climate Model for Energy (ACME): Ocean and Sea-Ice Processes. Office of Scientific and Technical Information (OSTI), April 2020. http://dx.doi.org/10.2172/1609023.

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3

Driscoll, Frederick R., Jochem W. Weber, Dale S. Jenne, Robert W. Thresher, Lee J. Fingersh, Dianna Bull, Ann Dallman, et al. Methodology to Calculate the ACE and HPQ Metrics Used in the Wave Energy Prize. Office of Scientific and Technical Information (OSTI), March 2018. http://dx.doi.org/10.2172/1426063.

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4

Felix, Meier, Wilfried Rickels, Christian Traeger, and Martin Quaas. Working paper published on NETs in strategically interacting regions based on simulation and analysis in an extended ACE model. OceanNets, 2022. http://dx.doi.org/10.3289/oceannets_d1.5.

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Net-zero climate policies foresee deployment of atmospheric carbon dioxide removal wit geological, terrestrial, or marine carbon storage. While terrestrial and geological storage would be governed under the framework of national property rights, marine storage implies that carbon is transferred from one global common, the atmosphere, to another global common, the ocean, in particular if storage exceeds beyond coastal applications. This paper investigates the option of carbon dioxide removal (CDR) and storage in different (marine) reservoir types in an analytic climate-economy model, and derives implications for optimal mitigation efforts and CDR deployment. We show that the introduction of CDR lowers net energy input and net emissions over the entire time path. Furthermore, CDR affects the Social Cost of Carbon (SCC) via changes in total economic output but leaves the analytic structure of the SCC unchanged. In the first years after CDR becomes available the SCC is lower and in later years it is higher compared to a standard climate-economy model. Carbon dioxide emissions are first higher and then lower relative to a world without CDR. The paper provides the basis for the analysis of decentralized and potentially non-cooperative CDR policies.
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5

Koch, Dorothy, Sally McFarlane, Shaima Nasiri, Ashley Williamson, Anthony Del Genio, William Gustafson, James Mather, Philip Rasch, and Shaocheng Xie. Accelerated Climate Modeling for Energy (ACME) – Atmospheric Radiation Measurement (ARM) Climate Research Facility – Atmospheric System Research (ASR) Coordination Workshop, October 21–22, 2015. Office of Scientific and Technical Information (OSTI), March 2016. http://dx.doi.org/10.2172/1471413.

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