Gotowe bibliografie tematyczne / Liquid desiccants-Regeneration

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Gotowa bibliografia na temat „Liquid desiccants-Regeneration”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Liquid desiccants-Regeneration"

Al-Farayedhi, A. A., P. Gandhidasan i S. Younus Ahmed. "Regeneration of liquid desiccants using membrane technology". Energy Conversion and Management 40, nr 13 (wrzesień 1999): 1405–11. http://dx.doi.org/10.1016/s0196-8904(99)00036-9.

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Gandhidasan, P., i A. A. Al-Farayedhi. "Solar regeneration of liquid desiccants suitable for humid climates". Energy 19, nr 8 (sierpień 1994): 831–36. http://dx.doi.org/10.1016/0360-5442(94)90035-3.

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Hermanto, R. Hengki. "Analisis Kenyamanan Manusia (Human Comfort) pada Sistem Pendingin Desiccant Cair Tenaga Matahari Menggunakan Konfigurasi Aliran Berlawanan (Counter Flow)". Jurnal Konversi Energi dan Manufaktur 2, nr 1 (30.04.2015): 23–28. http://dx.doi.org/10.21009/jkem.2.1.5.

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High water vapour content in air can cause a number of problems as for human or surrounding materials. For human a highwater vapour can create physiological stress, discomfort, and also can encourage ill health. While, the cause for the environment iscan accelerate the corrosion of metals, accelerate the growth of spores and mould, can reduce the electrical resistance of insulatorsand etc.Desiccant systems have been proposed as energy saving alternatives to vapor compression air conditioning for handlingespecially the latent load and also sensible load. Use of liquid desiccants offers several design and performance advantages oversolid desiccants, especially when solar energy is used for regeneration. The liquid desiccants contact the gas inside the packed towerof liquid desiccant solar cooling system and the heat transfer and mass transfer will occur. This paper is trying to study the humancomfort analysis inside the packed tower of dehumidifier systems. This human comfort analysis consist of human comfort and energythat consume by the system. The results of this paper later on can be used to determine the best performance of the systems.

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Si, Laisheng, i Xiuwei Li. "Solar interfacial regeneration performance of different solutions for liquid desiccant cooling system". Journal of Physics: Conference Series 2520, nr 1 (1.06.2023): 012002. http://dx.doi.org/10.1088/1742-6596/2520/1/012002.

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Abstract A liquid desiccant cooling system (LDCS) is a promising energy-saving air-conditioning system with the advantages of being driven by low-grade heat and excellent humidity control ability. However, the problems of high energy consumption and low energy utilization efficiency of its regenerator limit its further development. To improve, a novel solar interfacial regeneration (SIR) method is proposed. The method can convert solar energy into heat and locate the heat at the evaporation interface so that the regenerator has high energy utilization efficiency. Experimental studies were carried out on different liquid desiccants. The results show that the thermal regeneration efficiency of this method is 2.6 to 2.9 times that of the conventional thermal regeneration method. LiBr solution has the best regeneration performance, but MgCl2 and CaCl2 are cheaper. Considering energy utilization efficiency and economic cost, the mixed desiccant may be a better choice. These advances could make SIR-based LDCS a potential contender for future air-conditioning systems.

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Priya, S. Shanmuga, Sneha Reddy, Priyadarshini Balachandar i Sanober Wadhwania. "Solar assisted liquid desiccant cooling using clay based membranes". MATEC Web of Conferences 144 (2018): 04011. http://dx.doi.org/10.1051/matecconf/201814404011.

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The environmental concerns have led to the urge of the usage of non-conventional energy resources like solar, wind, thermal, geothermal etc. which provide enormous source of energy without causing any further diminution of the environment. Instead of the conventional HVAC systems that cause colossal environmental perils, usage of liquid desiccants in coming in vogue whereby reducing ecological threats. Moreover, solar assisted systems provide further impulse to such systems. This paper discusses about the various comparisons between liquid desiccants: Lithium chloride, Potassium formate and Calcium chloride and concludes that potassium formate is the best desiccant to be used among the three. Potassium formate (HCOOK) is used which is cheaper and less corrosive as compared to the other aqueous salts, and has a negative crystallization temperature. Potassium formate is a new liquid desiccant and thus, not much research is available currently. The weather conditions of Manipal provide an appropriate condition for the experimentations of solar aided liquid desiccant evaporative cooling systems due to its humid climate and intense solar radiation obtained. The small scale experimentation also encounters the problem of liquid desiccant carryover by the air flow, with the help of clay based membranes which are again cheap, environmentally benign and obtained in a facile way. The projected system takes complete advantage of pure solar energy aimed at the regeneration of liquid desiccant.

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Longo, Giovanni A., i Andrea Gasparella. "Experimental Analysis on Chemical Dehumidification of Air by Liquid Desiccant and Desiccant Regeneration in a Packed Tower". Journal of Solar Energy Engineering 126, nr 1 (1.02.2004): 587–91. http://dx.doi.org/10.1115/1.1637642.

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This paper presents the experimental tests on the chemical dehumidification of air by a liquid desiccant and desiccant regeneration carried out in an absorption/desorption tower with random packing. The experimental set-up is fully described together with measurements, procedures, data reduction, and accuracy. The experimental tests include 46 dehumidification runs and 38 desiccant regeneration runs carried out with the traditional hygroscopic solution H2O/LiBr and the new solution H2O/KCOOH in the typical operative ranges of air conditioning applications. The experimental results are reported in terms of humidity reduction, desiccant concentration change, and tower efficiency. The experimental tests show that chemical dehumidification of air by liquid desiccants ensures consistent reduction in humidity ratio, which is suitable for the application to air conditioning or drying processes. The experimental results are also compared to a one-dimensional simulation code of a packed tower: a fair agreement was found between experimental and calculated performance.

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Salarian, Hesamoddin. "Study of the Heat and Mass Transfer in a Dehumidification of Liquid Desiccant". Applied Mechanics and Materials 110-116 (październik 2011): 120–26. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.120.

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Desiccant systems have been proposed as energy saving alternatives to vapor compression air conditioning for handling the latent load. Desiccants are classified as either liquid or solid. The main components for a liquid desiccant system are the dehumidification and regeneration towers. This paper presents the results from a study of the performance of a packed tower absorber for lithium chloride desiccant dehumidification system. A finite difference model was developed to determine the packing height of the dehumidification towers. The finite difference model was written in MATLAB language which is a suitable model to measure the optimum height of a tower. The paper also examines the effects of different design parameters on the height of a packed tower using a mathematical model. The effects of air and liquid flow rates, air humidity, desiccant temperature and concentration were reported on the packing height and humidity effectiveness of the column. In conclusion the results of the present study are compared with previous experimental studies.

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Cheng, Qing, i Wang Pei. "Performance comparison on different liquid desiccants in the liquid desiccant air-conditioning using electrodialysis regeneration: LiCl and LiBr aqueous solutions". International Journal of Refrigeration 107 (listopad 2019): 1–10. http://dx.doi.org/10.1016/j.ijrefrig.2019.08.003.

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Gandhidasan, P. "Closed-Type Solar Regenerator: Analysis and Simulation". Journal of Energy Resources Technology 117, nr 1 (1.03.1995): 58–61. http://dx.doi.org/10.1115/1.2835321.

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Due to many potential problems associated with an open regeneration system in application to reconcentration with liquid desiccants, a closed-type solar regenerator has been simulated and analyzed in this paper. It consists of a flat, blackened, tilted surface with a transparent glazing as a covering. The weak desiccant to be concentrated flows as a thin film over the absorber and the water evaporating from the desiccant due to absorption of solar energy is condensed on the underside of the glass cover. A theoretical model, which includes the variation of rate of evaporation of water along the flow length of the regenerator, has been used to examine the thermal performance of the regenerator. Changes in thermal performance are reported in terms of insolation and the mass of water evaporated from the desiccant for different operating parameters.

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Haque, Md Emdadul. "Ethylene Glycol Regeneration Plan: A Systematic Approach to Troubleshoot the Common Problems". Journal of Chemical Engineering 27 (27.07.2013): 21–26. http://dx.doi.org/10.3329/jce.v27i1.15853.

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Mono Ethylene Glycol (MEG) is used primarily at low-temperature processing plant for extracting natural gas liquids. Typically a physical process plant comprises with gas dehydration system which allows for physical separation of water saturated gas by simple dew point depression and water condensation brought about by chilling from cross exchange with propane refrigerant. The resultant wet gas is prevented from freezing by injection of liquid desiccants to inhibit hydrate formation. The resulting dehydrated gas stream will have a dew point preciously equal to the saturated water volume of the gas at its coolest temperature. Mono Ethylene Glycol has been chosen as hydrate inhibitor because of its low volatility, low toxicity, low flammability, good thermodynamic behavior, and simple proven technology requirement and availability. But it has two common characteristic problems in regeneration plant that is fouling of equipment by iron carbonate, Ca+2/Mg+2 salt deposits and cross contamination of MEG and condensate contamination. MEG in condensate causes condensate specification problems, fouling of condensate stabilization equipment and contamination of wastewater streams. Condensate in MEG causes stripping effect due to condensate vaporization, lower operating temperature, higher MEG purities, and contamination of wastewater streams from MEG Regeneration system and burping of column due to condensate buildup. Another common problem is glycol losses due to carryover with dehydrated gas and which finally accumulates in pipelines and causes corrosion. Other reasons of glycol losses are higher column temperature, foaming, leaks at pump or pipe fittings, operated with excessive gas flow rates and rapid changes in gas flow rates. Column Flooding occurred if feed glycol circulation rate exceeded design limit and it does not allow proper separation of glycol and water separator and much glycol losses through vent line. This paper presents an experimental study of glycol losses. Effort has been made to investigate the causes and the study suggests some mitigation plans. Current study suggests the efficiency of the dehydration process depends on a large extent on the cleanliness of the glycol and the regular monitoring of glycol parameters such as glycol concentration, hydrocarbon content, salt content, solids content, pH stabilization, iron content, foaming tendency etc. Losses due to vaporization from reboiler can be minimized by adjusting operating parameters. By developing monitoring procedure and periodic maintenance about 90% operating problems of Glycol Regeneration Plant can be reduced. DOI: http://dx.doi.org/10.3329/jce.v27i1.15853 Journal of Chemical Engineering, IEB Vol. ChE. 27, No. 1, June 2012: 21-26

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Rozprawy doktorskie na temat "Liquid desiccants-Regeneration"

Tafesse, Gezahegn Habtamu. "Investigations on regeneration of liquid desiccants using solar energy". Thesis, IIT Delhi, 2016. http://localhost:8080/iit/handle/2074/7116.

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Części książek na temat "Liquid desiccants-Regeneration"

"Ultrasound-Atomizing Regeneration for Liquid Desiccants". W Ultrasonic Technology for Desiccant Regeneration, 177–234. Singapore: John Wiley & Sons Singapore Pte. Ltd, 2014. http://dx.doi.org/10.1002/9781118921616.ch4.

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AL-ZUHAIR, M., i A. A. M. SAYIGH. "Liquid Desiccants for Low Energy Regeneration". W Energy Conservation in Buildings, 406–12. Elsevier, 1991. http://dx.doi.org/10.1016/b978-0-08-037215-0.50076-6.

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"Appendix A: Basic Equations for Properties of Common Liquid Desiccants". W Ultrasonic Technology for Desiccant Regeneration, 293–306. Singapore: John Wiley & Sons Singapore Pte. Ltd, 2014. http://dx.doi.org/10.1002/9781118921616.app1.

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Streszczenia konferencji na temat "Liquid desiccants-Regeneration"

Qadir, Abdul, i Peter R. Armstrong. "Hybrid Liquid-Air Transpired Solar Collector: Model Development and Sensitivity Analysis". W ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-40571.

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The paper develops an analytical model of a novel hybrid liquid-air transpired solar collector which could simultaneously heat air and water for applications such as regeneration of liquid desiccants. An energy balance is performed, leading to a system of ODEs which is solved to obtain the air and water outlet temperatures of the collector. Three sets of sensitivity analyses have been performed on the collector varying the total thermal capacitance rates of the air and water (m˙cp)total, ratio of air to total thermal capacitance rate (m˙cp ratio), and the usual boundary conditions of water inlet temperature Twi, ambient temperature Tamb, solar radiation G and wind speed Vw. General performance curves for the collector with increasing (Twi−Tamb)/G have been developed as a result of these analyses. It has been observed that a m˙cp ratio between 0.3 and 0.4 provides with an optimal collector performance. Moreover at low m˙cp ratios, the collector performance has been observed to be very sensitive to wind speed.

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Rondon, Marianna, Yoldes Khabzina, Alejandro Orsikowsky, Jean-Benoit Laudet, He Zhao, Olivier Perraud, Emil Gyllenhammar i Jostein Kolbu. "Proof-Of-Concept: Subsea Dehydration Using TSA Adsorption". W Offshore Technology Conference. OTC, 2022. http://dx.doi.org/10.4043/32063-ms.

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Abstract In the current energy transition scenario, gas represents one of the main pillars for a greener energy mix. In 2015, we presented two promising schemes to produce a challenging notional gas field located 2500 meters water depth and 300 km from shore using only subsea processing [1]. The first scheme consists of subsea gas/liquid separation, gas compression and liquid boosting for multiphase export to shore; the second, developing a subsea high-pressure dehydration system for up to 300 Bara, using adsorption, to avoid the use of a monothylene glycol (MEG) loop and export dry gas directly from subsea. Performance of desiccants at such high pressure has not been studied thoroughly and qualification was necessary. This paper presents the proof-of-concept of a subsea dehydration technology at high pressure. Several criteria were used to evaluate the potential technologies: treatment performance, power consumption, production at varying pressure, sensitivity to feed contaminants, CAPEX, OPEX, weight & size, among others. The preferred solution was concluded to be temperature swing adsorption (TSA). Once TSA was selected as the most promising dehydration technology, different laboratory tests were performed and several parameters were identified to screen the potential desiccants: adsorbent working capacity, water/CH4 selectivity, water adsorption energy and regeneration temperature. Finally, a pilot was built and a test matrix was run in order to prove the concept. The adsorption, and specifically a TSA Process, was the technology selected in the first part of the study. The choice was based mainly on the energy efficiency and the technology readiness level. In the second part of this project, the feasibility of the process at high pressure (up to 300 Bara) and its application subsea were proven through experimental tests performed at a laboratory pilot. Characterization tests and water and methane adsorption/desorption isotherms are briefly presented. Based on these results, zeolite, alumina and activated carbon adsorbents were identified. Finally, complete adsorption/desorption cycles at different pressures and temperatures were performed, proving the concept and its potential. This is the first study proving experimentally the concept, and presenting the potential, of the TSA Process for subsea dehydration at high pressure. This is one of the subsea processing building blocks identified in many gas field architectures and it is especially required to produce remote and deep reservoirs at competitive costs.

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