Relevant bibliographies by topics / Heat Pump Controller Assessment

Academic literature on the topic 'Heat Pump Controller Assessment'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Heat Pump Controller Assessment"

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S. Raghuwanshi, Santosh, and Vikas Khare. "Sizing and implementation of Photovoltaic Water Pumping System for Irrigation." IAES International Journal of Artificial Intelligence (IJ-AI) 7, no. 1 (March 1, 2018): 54. http://dx.doi.org/10.11591/ijai.v7.i1.pp54-62.

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<p>Solar photovoltaic systems convert energy of light directly into electrical<br />energy. This work presents, a process to compute the required size of the<br />stand-alone solar photovoltaic generator based water pumping system<br />for an existing area. In addition solar photovoltaic generator is<br />connecting voltage source inverter fed vector controlled induction<br />motor-pump system. Perturb and observe are used for harvesting<br />maximum power of PV generator in between buck-boost DC converter<br />and inverter system. In this paper system result is validated by fuzzy<br />logic system and compare with variable frequency drives based PI<br />controllers, driving motor-pump system. The operational performance<br />at 60 m head, VFD based controllers in terms overshoot and setting time<br />and also analysis performance of motor-pump set under different<br />weather conditions. By assessment of system we find that speed and<br />torque variation, overshoot and settling time is more with PI controller,<br />Fuzzy logic controller (FLC) performance have dominance to VFD<br />based PI controller.</p>
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Deibert, Brendan, and Travis Wiens. "Performance Assessment of a Low-Cost Miniature Electrohydrostatic Actuator." Actuators 11, no. 11 (November 18, 2022): 334. http://dx.doi.org/10.3390/act11110334.

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Low-cost small-scale (<100 W) electrohydrostatic actuators (EHAs) are not available on the market, largely due to a lack of suitable components. Utilizing plastic 3D printing, a novel inverse shuttle valve has been produced which, when assembled with emerging small-scale hydraulic pumps and cylinders from the radio-controlled hobby industry, forms a low-cost and high-performance miniature EHA. This paper presents experimental test results that characterize such a system and highlight its steady, dynamic, and thermal performance capabilities. The results indicate that the constructed EHA has good hydraulic efficiency downstream of the pump and good dynamic response but is limited by the efficiency of the pump and the associated heat generated from the pump’s losses. The findings presented in this paper validate the use of a 3D printed plastic inverse shuttle valve in the construction of a low-cost miniature EHA system.
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Petrash, V. D., V. P. Baryshev, L. F. Shevchenko, E. A. Geraskina, and N. V. Danichenko. "Perspective Ways of Energy-Efficient Modernization of Heat Supply Systems Based on Heat Pump Technologies." Problems of the Regional Energetics, no. 4(56) (November 2022): 47–60. http://dx.doi.org/10.52254/1857-0070.2022.4-56.05.

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This work is devoted to determination a generalized indicator for a preliminary assessment of the conditions for increasing the efficiency of modernized systems of centralized and decentralized heat supply using heat pump technologies. This goal is achieved through a critical analysis of the results of the actual state of pipelines and equipment, known approaches to the reconstruction of heat supply systems and the establishment of a generalized indicator of the conditions for increasing the efficiency of using primary fuel energy. This made it possible to formulate a generalized approach to the modernization of heat supply systems with the introduction of heat pump technologies. The most important result of the study is the established generalized dependence of the assessment of the increase in the efficiency of heat supply systems on the initial conditions of regime parameters with the rationale for the feasibility of modernizing district heating systems based on the diverse phased introduction of heat pump technologies at all stages: generation, transportation, distribution, conversion and controlled consumption of heat by subscriber system. The significance of the obtained research results lies in the fact that the proposed approach to the modernization of centralized and decentralized heat supply systems based on heat pump installations with real conversion factors in the range (3--5) with an increase in the available heat potential is to increase the efficiency and expand the use of heat from primary fuel with its savings of 1-2.7 times.
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SUYAMA, Akihiro, and Kazuhiro SAISHIYO. "Economic Assessment of Optimal Controlled Heat Pump Water Heating and Supply System." Proceedings of the National Symposium on Power and Energy Systems 2017.22 (2017): C132. http://dx.doi.org/10.1299/jsmepes.2017.22.c132.

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Osintsev, Konstantin, Sergei Aliukov, and Yuri Prikhodko. "A Case study of Exergy Losses of a Ground Heat Pump and Photovoltaic Cells System and Their Optimization." Energies 14, no. 8 (April 8, 2021): 2077. http://dx.doi.org/10.3390/en14082077.

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The aim of this scientific research is to experimentally determine the exergy losses of a ground heat pump and further optimization for more efficient use of operating modes and improvement of individual structural elements. In addition, it is proposed to use photovoltaic panels as a backup power source for the experimental installation under study. The exergetic losses are calculated, not only for the ground heat pump itself, with R407C refrigerant. The research methodology consists in a comprehensive assessment of exergetic flows, their optimization using new methods of approximation of piecewise linear functions, and the development of prerequisites for the use of anergy as one of the components of a new type of analysis of the efficiency of low-potential energy sources. As a result of processing the experimental data, the values of Coefficient of performance (COP) 4.136, exergetic temperature for the lower heat source 0.0253 and for the upper heat source 0.155, exergetic efficiency of the installation 0.62, and total loss of specific exergy of the heat pump 24.029 kJ/kg were obtained. Controllers with the Modbus protocol were used for data collection. Matlab Simulink was used to process the experimental data. When carrying out the procedure for optimizing the operating modes and selecting several modes with minimal exergetic losses, an important role is given to mathematical methods of processing statistical data. The method of increasing the efficiency of the heat pump is shown, first of all, based on the use of photovoltaic panels as a backup power source and optimization of exergetic losses due to exergo-anergetic evaluation of operating modes. The authors present the measurement errors of the heat pump plant parameters in the form of a 3D Gaussian curve, which becomes possible only when applying new approximation methods in the processing of measurements.
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Abid, Muhammad, Neil Hewitt, Ming-Jun Huang, Christopher Wilson, and Donal Cotter. "Domestic Retrofit Assessment of the Heat Pump System Considering the Impact of Heat Supply Temperature and Operating Mode of Control—A Case Study." Sustainability 13, no. 19 (September 29, 2021): 10857. http://dx.doi.org/10.3390/su131910857.

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In this study, performance assessment of the variable speed compressor-based air source heat pump (ASHP) system as a domestic retrofit technology instead of fossil fuel-based heating technologies for the 1900s Mid terraced house is investigated. The assessment was conducted considering operating mode of control and heat supply temperature impact of the system. In the literature, ASHP system experimental development with variable speed mode (VSM) of control in comparison to fixed speed mode (FSM) of control at low to medium and high heat supply temperature in the context of UK was found with very limited number of studies, but without considering retrofit application. The focus of the earlier studies was on the individual components and performance improvement. The designed heat pump (HP), developed, and tested at constant heat load, simulating the real domestic heat demand under the controlled laboratory conditions and numerical modeling is utilized for the analysis purposes. The HP performance, energy demand, carbon emissions, and cost varies significantly due to changing heat supply temperature (35 °C, 45 °C, and 55 °C), control mode and accordingly the carbon emission and cost savings are achieved. The oil and gas boilers ranges from conventional to highly efficient type and evaluated in terms of annual running cost, energy consumptions, and carbon emissions in comparison with the HP system. Additionally, a comparative study with the existing retrofitted very high temperature ASHP inside the house is conducted. The developed HP at 55 °C could not defeat the very high heat supply temperature HP system (75 °C supply temperature) in performance and cost savings but become attractive at low supply temperature (35 °C). The HP system in VSM at low heat supply temperature instead of gas boiler (90% efficiency) could cut the annual carbon emissions by 59% but with additional 6% running cost for the Mid terraced test house in Belfast climatic conditions.
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Muravyova, E. A., and R. F. Imaev. "Synthesis of a fuzzy controller for identification and quantification of disturbances by trends." Journal of Physics: Conference Series 2094, no. 4 (November 1, 2021): 042084. http://dx.doi.org/10.1088/1742-6596/2094/4/042084.

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Abstract This article describes the main stages of constructing a fuzzy controller that identifies disturbances in the automatic control system by trends on the example of the brine cycle, namely, heating the purified one going to electrolysis. This method can be implemented in perturbation control systems for the formation of control actions, as well as for diagnostic purposes. The aim of the study is to synthesize a fuzzy controller for identifying and quantifying perturbations by trends. The article proposes a method for estimating perturbations by trends. A mathematical model of processes implemented in the Mathcad environment is constructed. A conceptual model of a fuzzy controller for determining the perturbation is implemented. As a result of the research conducted on the basis of the proposed method, two fuzzy controllers were synthesized that quantify disturbances in the water heating cycle, namely: the deviation of the temperature of the purified brine entering the heat exchanger, as well as the deviation of the water temperature in the tank from the norm. The developed project is of practical importance, since the information about disturbances obtained as an output value from the fuzzy controller can be used in the diagnosis and assessment of the system state at any time, which, in turn, can be used for smoother control when applying a correction signal to the controller that controls the dampers and pumps, as well as to prevent accidents.
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D’Ettorre, F., M. De Rosa, P. Conti, E. Schito, D. Testi, and D. P. Finn. "Economic assessment of flexibility offered by an optimally controlled hybrid heat pump generator: a case study for residential building." Energy Procedia 148 (August 2018): 1222–29. http://dx.doi.org/10.1016/j.egypro.2018.08.008.

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Gizzi, Martina, Glenda Taddia, Elena Cerino Abdin, and Stefano Lo Russo. "Thermally Affected Zone (TAZ) Assessment in Open-Loop Low-Enthalpy Groundwater Heat Pump Systems (GWHPs): Potential of Analytical Solutions." Geofluids 2020 (April 27, 2020): 1–13. http://dx.doi.org/10.1155/2020/2640917.

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Thermal perturbation produced in the subsurface by open-loop groundwater heat pump systems (GWHPs) must be predicted and constantly controlled, especially in the shallow aquifers of more densely urbanized areas, in order to guarantee plants’ long-term sustainable use and to avoid adverse effects on adjacent geothermal systems. Transient conditions in the flow dynamic can be successfully modelled by means of numerical modelling tools. However, for small plants in suitable hydrogeological systems, an alternative tool for predicting the thermally affected zone (TAZ) around the injection well can be found in analytical solutions for steady advective transport in a shallow aquifer. The validity of using steady analytical solutions to predict the TAZ development at the end of two different cooling seasons (2010 and 2016) was tested in the Politecnico di Torino GWHP system (NW Italy). When fixing the constant thermal difference (ΔT) between the injection and abstraction wells at 5°C, results revealed that a rather reliable assessment of the TAZ of Politecnico di Torino GWHPs, in Turin shallow aquifer, can be performed by plotting the cumulative distribution function of the injected discharge rate (Q) and setting 63% as a steady value.
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Bosisio, Alessandro, Matteo Moncecchi, Andrea Morotti, and Marco Merlo. "Machine Learning and GIS Approach for Electrical Load Assessment to Increase Distribution Networks Resilience." Energies 14, no. 14 (July 8, 2021): 4133. http://dx.doi.org/10.3390/en14144133.

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Currently, distribution system operators (DSOs) are asked to operate distribution grids, managing the rise of the distributed generators (DGs), the rise of the load correlated to heat pump and e-mobility, etc. Nevertheless, they are asked to minimize investments in new sensors and telecommunication links and, consequently, several nodes of the grid are still not monitored and tele-controlled. At the same time, DSOs are asked to improve the network’s resilience, looking for a reduction in the frequency and impact of power outages caused by extreme weather events. The paper presents a machine learning GIS-based approach to estimate a secondary substation’s load profiles, even in those cases where monitoring sensors are not deployed. For this purpose, a large amount of data from different sources has been collected and integrated to describe secondary substation load profiles adequately. Based on real measurements of some secondary substations (medium-voltage to low-voltage interface) given by Unareti, the DSO of Milan, and georeferenced data gathered from open-source databases, unknown secondary substations load profiles are estimated. Three types of machine learning algorithms, regression tree, boosting, and random forest, as well as geographic information system (GIS) information, such as secondary substation locations, building area, types of occupants, etc., are considered to find the most effective approach.
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Dissertations / Theses on the topic "Heat Pump Controller Assessment"

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Wolf, Tobias. "Model-based Assessment of Heat Pump Flexibility." Thesis, Uppsala universitet, Fasta tillståndets fysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-284083.

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Today's energy production is changing from scheduled to intermittent generation due to the increasing energy injection from renewable sources. This alteration requires flexibility in energy generation and demand. Electric heat pumps and thermal storages were found to have a large potential to provide demand flexibility which is analysed in this work. A three-fold method is set up to generate thermal load profiles, to simulate heat pump pools and to assess heat pump flexibility. The thermal profile generation based on a combination of physical and behavioural models is successfully validated against measurement data. A randomised system sizing procedure was implemented for the simulation of heat pump pools. The parameter randomisation yields correct seasonal performance factors, full load hours and average operation cycles per day compared to 87 monitored systems. The flexibility assessment analysis the electric load deviation of representative heat pump pool in response to 5 different on / off signals. The flexibility is induced by the capacity of thermal storages and analysed by four parameters. Generally, on signals are more powerful than off signals. A generic assessment by the ambient temperature yield that the flexibility is highest for heating days and the activated additional space heating storage: Superheating of the storage to the maximal temperature provides a flexible energy of more than 400 kWh per 100 heat pumps in a temperature range between -10 and +13 °C.
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Martin-Du, Pan Oliver. "Operational performance assessment of decentralised energy and district heating systems." Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/17456.

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District heating systems can contribute to reducing the UK's CO2 emissions. This thesis investigates the operational performance of current district heating (DH) systems with the existing and a possible future energy sector. The main contributions to knowledge are:  Operational, financial and exergy performance assessments of three functioning DH systems and one decentralised energy (DE) technology  A methodology to optimise a DH system in a resource efficient and cost effective way The aims of DH systems are to provide heat, reduce CO2 emissions, ensure energy security by operating in a resource efficient way and to tackle fuel poverty. However, the case studies in this project confirm that DH systems operate poorly in the UK. This is largely because of the heat losses from the DH network to the soil being high and the plant operation being suboptimal. Four case studies were analysed. The 785 room Strand Palace hotel has two 250 kWe combined heat and power (CHP) engines set to modulate following the hotel's electricity consumption and providing approximately 90% of this annual demand. It was found that the CHP engines never operate at full load throughout a full day, firstly because the plant cannot export electricity to the grid and secondly the system is not fitted with a thermal store. Financial analysis revealed that the hotel does not reduce its heating cost by operating the CHP engines, but that the energy service company (ESCo) makes £77,000 net operating income per year. Elmswell in Suffolk (UK) is a low heat density DH system that generates heat with a 2008 biomass boiler and pumps it to 26 terraced and semi-detached dwellings. It was found that 39% of its heat is lost to the soil and that the natural gas boiler generates 45% of the heating load and operates with a seasonal efficiency of 65%. The heat losses to the soil for this system were compared to a DH system of higher heat density, Loughborough University, with a lower heat loss of 22% to the soil. In August 2011, Loughborough University installed a 1.6 MWe CHP engine to operate with four 3 MWth natural gas boilers to supply heat to its DH network. A study undertaken demonstrated that by adding a 2 MWe CHP engine with a thermal storage instead of a 1.6 MWe CHP engine on its own could further increase the CO2 emissions savings from 8% to 12.4%. The energy centre at Pimlico District Heating Undertaking (PDHU) includes a gas fired cogeneration plant that supplies heat to 3 schools, 3,256 dwellings and 55 commercial units. It also benefits from a 2,500 m3 thermal store. Every component of PDHU was investigated in detail and its current operation was optimised and compared to a selection of new operating scenarios. It was found that: i) The thermal store operated with 93% thermal efficiency and was not used to reduce the energy consumption or to enable more cogeneration, ii) The CHP engines were undersized and generated only 18% of the required heat in 2012, iii) The boilers modulate and £ 70,000 could be saved per year by setting them to operate at full load by making use of the thermal store, iv) By installing an open-loop heat pump using the river Thames, PDHU could then guarantee to comply with current and likely future policies impacts by setting the energy plant to operate in CHP mode or as an electricity consumer at defined times to benefit from low energy utility costs and to minimise CO2 emissions. A comparison of selected performance metrics was then undertaken and it was found that none of the three DH systems operate in a resource efficient way and that the heating cost could be reduced further by optimising the operation of the systems. To do this, a new optimisation methodology is proposed by maximising their exergy efficiency in addition to maximising their overall energy efficiency and CO2 emissions reduction.
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Vo, Minh Toàn. "Assessment of heat pump operating faults coupled with building energy simulation using Petri net model." Thesis, La Rochelle, 2021. https://tel.archives-ouvertes.fr/tel-03685404.

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Les pompes à chaleur offrent une solution efficace et durable pour le chauffage et le refroidissement des bâtiments. Cependant, ces systèmes fonctionnent parfois avec une faible efficacité, en raison des défauts. Dans cette recherche, nous nous concentrons sur trois défauts de fonctionnement : les fuites de réfrigérant, l'encrassement du condenseur et l'encrassement de l'évaporateur. Ce sont les défauts de fonctionnement les plus fréquents et les plus impactés. Nous proposons de développer une méthode pour modéliser ces défauts de fonctionnement et les associer à un modèle de simulation de bâtiment. En premier lieu, nous avons développé des modèles physiques d'une pompe à chaleur résidentielle air-air afin d’estimer le coefficient de performance (COP/EER) de la pompe à chaleur, en fonction de l'intensité d'utilisation, et du défaut de fonctionnement. Ensuite, un modèle de réseau de Petri a été proposé pour déterminer a priori la structure de l'évolution des défauts. Dans un deuxième temps, nous appliquons une notion d'incertitude de la base de données des défauts pour prendre en compte différents cas de travail et généraliser le modèle d'occurrence des défauts. Nous l'avons associé à l'outil de simulation énergétique dynamique COMETh, pour simuler la consommation énergétique annuelle. Cette méthode nous permet d'analyser et de déterminer l'incertitude globale des impacts des défauts sur les performances de la pompe à chaleur et sur la consommation énergétique totale du bâtiment. La méthode a été appliquée à un cas d’étude sur un bâtiment résidentiel à Paris sur une période de 15 ans. Les résultats soulignent la possibilité de la méthodologie proposée
Heat pumps give an efficient and sustainable solution for both heating and cooling. However, these systems sometimes operate with a lower efficiency, because of the faults. In this research, we focus on three operating faults : refrigerant leakage, condenser fouling, and evaporator fouling. They are the most frequent and most impacted operating faults. They evolve undetectably over time until they start to create the energy and comfort problems. We propose to develop a method to model these operating faults and to associate them with a building simulation model. In the first place, we developed physical models of an air-to-air residential heat pump in order to predict the coefficient of performance (COP/EER) of the heat pump, as a function of the use intensity, and operating fault. Then, a Petri net model was proposed to determine a priori structure of fault evolution. In the second step, we apply a notion of uncertainty of fault database to take into account different working cases and generalize the fault occurrence model. We associated it with the dynamic energy simulation tool COMETh, a building simulation model developed by CSTB, to simulate the annual energy consumption. This method helps us to analyze and determine the global uncertainty of fault impacts on the heat pump performance and on the whole energy consumption of the building. The method was applied to a case study of residential building in Paris over 15 years. With three heat pump operating faults, the building consumption remarkably increased from the third year. At the 15th year, the building consumption is double than the standard value. The results underline the possibility of the proposed methodology
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Khadra, Alaa. "Economic Performance Assessment of Three Renovated Multi-Family Houses with Different HVAC Systems." Thesis, Högskolan Dalarna, Energiteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:du-29076.

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Since the building sector is responsible for 40% of the energy consumption and 36% of CO2 emissions in the EU, the reduction of energy use has become a priority in this sector. The EU has adopted several policies to improve energy efficiency. One of these policies aims to achieve energy efficient renovations in at least 3% of buildings owned and occupied by governments annually. In Sweden, a large part of existing buildings was built between 1965 and 1974, a period commonly referred to as ‘miljonprogrammet’. Stora Tunabyggen AB, the public housing company in Borlänge municipality, begun a renovation project in the Tjärna Ängar neighborhood within the municipality with the greatest share of its buildings stock from this period. The pilot project started in 2015. The aim of this project was to renovate three buildings with similar measures, that is, by adding 150 mm attic insulation, replacing windows with higher performing ones (U-value 1 W/m ²K), by adding 50 mm of insulation to the infill walls and by the installation of flowreducing taps. The essential difference between the three renovation packages is the HVAC systems. The selected HVAC systems are (1) exhaust air heat pump, (2) mechanical ventilation with heat recovery and (3) exhaust ventilation. Life cycle cost analysis was conducted for the three building and sensitivity analysis for different values of discount rate and energy price escalation was performed. The study found that the house with exhaust ventilation has the lowest life cycle cost and the highest energy cost. The house with exhaust air heat pump has 3% higher life cycle cost and 18% lower energy use at 3% discount rate and 3% energy price escalation. The study found that mechanical ventilation with heat recovery is not profitable, although it saves energy. The sensitivity analysis has shown that the possible increment of price energy and lower discount rate give higher value for the future costs in life cycle cost analysis. This lead to the main finding of this thesis, which is that exhaust air heat pump is the best choice for the owner according to the available data and the assessed parameters.
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Zhang, Lingxi. "Techno-economic and environmental assessment of a smart multi-energy grid." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/technoeconomic-and-environmental-assessment-of-a-smart-multienergy-grid(c517bfe4-585e-4d49-bafb-d97dbfc15aa9).html.

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This PhD thesis proposes a bottom-up approach that accurately addresses the operational flexibility embedded in each part of a multi-energy system (MES). Several models which cover the simulations from replicating domestic electrified demands to power system scheduling are proposed. More specifically, a domes-tic multi-energy consumption model is firstly developed to simulate one minute resolution energy profiles of individual dwellings with the installation of prospec-tive technologies (i.e., electric heat pumps (EHPs), electric vehicles (EVs)). After-wards, a fast linear programming (LP) unit commitment (UC) model is devel-oped with the consideration of characteristics of generators and a full set of ancil-lary services (i.e., frequency response and reserves). More importantly, the fre-quency response requirements in low inertia systems are assessed with the con-sideration of three grid frequency regulations (i.e., rate of change of frequency, Nadir and quasi-steady state). Furthermore, the UC model has integrated vari-ous flexibility contributors in MES to provide ancillary and flexibility services, which include pumped hydro storages (PHSs), interconnectors, batteries and demand side resources (i.e., individual EHPs, heat networks, electrolysers). More importantly, the fast frequency response (FFR) provision from nonsynchronous resources is implemented and the demand response application of electrolysers is taken as an example to provide FFR in the UC model. By using the integrated UC model with the consideration of flexibility services provided by resources in the MES, the advantages of multi-energy operation can be clearly identified which can be used to inform system operators and policy makers to design and operate energy systems in a more economic and environment-friendly way.
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Пташник, Роман Ярославович, and Roman Ptashnyk. "Розробка та дослідження автоматизованої системи управління тепловим насосом." Master's thesis, Тернопіль, ТНТУ, 2019. http://elartu.tntu.edu.ua/handle/lib/29798.

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Роботу виконано на кафедрі ком’пютерно-інтегрованих технологій Тернопільського національного технічного університету імені Івана Пулюя Міністерства освіти і науки України Захист відбудеться 26 грудня 2019 р. о 12 .30 годині на засіданні екзаменаційної комісії № 45 у Тернопільському національному технічному університеті імені Івана Пулюя за адресою: 46001, м. Тернопіль, вул.Руська, 56, навчальний корпус №1, ауд. 401
Пташник В.Р. Розробка та дослідження автоматизованої системи управління тепловим насосом. 151 – автоматизація та комп’ютерно-інтегровані технології. – Тернопільський національний технічний університет імені Івана Пулюя. – Тернопіль, 2019. В результаті виконання роботи було проаналізовано актуальність питання застосування теплових насосів та їх перспективність порівняно з іншими генераторами тепла. Також було обґрунтовано методи застосування теплових насосів різних типів та вказано на їхні недоліки та переваги. Було розроблено систему керування тепловим насосом при модернізації комплексної системи опалення будівлі. Ptashnyk V.R. Development and research of an automated heat pump control system. 151 - automation and computer integrated technologies. - Ivan Puliuyi Ternopil National Technical University. - Ternopil, 2019. As a result of the work, the urgency of using heat pumps and their prospects in comparison with other heat generators were analyzed. Methods of using heat pumps of various types were also substantiated and their disadvantages and advantages were pointed out. A heat pump control system was developed for the modernization of the complex heating system of the building.
ВСТУП 7 1. АНАЛІТИЧНА ЧАСТИНА 8 1.1. Поняття теплового насоса, класифікація і область застосування 8 1.2. Огляд найбільш розповсюджених видів теплових насосів 10 1.3. Вибір приладу обігріву для обігріву приміщення у власному регіоні 15 1.5. Сфери використання енергії яку акумулює пристрій 23 1.6. Огляд недоліків та переваг теплових насосів 24 2 ТЕХНОЛОГІЧНА ЧАСТИНА 26 2.1. Технологічний цикл теплового насосу 26 2.2 Різні типи теплових насосів 30 2.3 Історія геотермальних теплових насосів 31 2.4 Принципові схеми геотермальних колекторних систем теплових насосів 33 2.5 Холодильні агенти 36 2.6 Використання теплої води з теплового насоса для опалення підлоги та радіаторів: переваги та недоліки. 36 3 КОНСТРУКТОРСЬКА ЧАСТИНА 37 3.1 Модернізація системи опалення із застосуванням теплового насосу 37 3.2 Розробка системи управління тепловим насосом 43 4 НАУКОВО-ДОСЛІДНА ЧАСТИНА 56 4.1. Огляд моделі 56 3.2 Термофізична модель тепла насосного агрегату 57 5. СПЕЦІАЛЬНА ЧАСТИНА 65 5.1. MQTT. Загальна характеристика 65 5.2 Типи повідомлення в MQTT 71 5.3 Семантика топіків 75 5.4 Захист передачі даних 77 5.5 Якість обслуговування 78 6. ОБГРУНТУВАННЯ-ЕКОНОМІЧНОЇ ЕФЕКТИВНОСТІ 80 6.1. Розрахунок норм часу на виконання науково-дослідної роботи 80 6.2 Визначення витрат на оплату праці та відрахувань на соціальні заходи 81 6.3 Розрахунок матеріальних витрат 84 6.4 Розрахунок витрат на електроенергію 85 6.5 Розрахунок суми амортизаційних відрахувань 86 6.6 Обчислення накладних витрат 87 6.7 Складання кошторису витрат та визначення собівартості науково-дослідницької роботи 88 6.8 Розрахунок ціни розробки системи 89 6.9 Визначення економічної ефективності і терміну окупності капітальних вкладень 90 7 ОХОРОНА ПРАЦІ ТА БЕЗПЕКА В НАДЗВИЧАЙНИХ СИТУАЦІЯХ 92 7.1 Організація охорони праці при роботі з системою управління 92 7.2 Електробезпека 94 7.3 Розрахунок заземлення 97 8 ЕКОЛОГІЯ 101 8.1 Екологізація виробництва 101 8.2 Зниження енергоємності та енергозбереження. 102 8.3 Джерела електромагнітних полів, іонізуючого випромінення та методи їх знешкодження. 104 ОСНОВНІ ВИСНОВКИ ДИПЛОМНОЇ РОБОТИ 106 БІБЛІОГРАФІЯ 107
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Kasbi, Bahar. "Assessment of optimization control strategies for energy management." Thesis, KTH, Optimeringslära och systemteori, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277835.

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With the increasing demand for renewable energy sources, new systems are being developed to sustain future infrastructure, accommodating these new energy sources. One of the proposed solutions is to incorporate distributed energy resources to different households in order to provide local energy demands effectively. To enable large-scale integration of flexible energy resources, it is crucial to reduce end-user energy and power costs, which can be done by designing an optimization model objected to minimize the total electricity bill. In the scope of this Master thesis, the interest lies in investigating a control strategy to operate batteries, heat pumps, and other assets by producing the optimal setpoints using the designed optimization algorithm that takes, amongst others, market and weather data as well as customer behavior into account. The applied method for producing these setpoints is sensitivity analysis in linear programming, and heat pump scheduling has been investigated for performance evaluation of this technique. The results show that applying this method produces the optimal setpoints over the non-controllable electricity load range by utilizing a low number of optimizations, i.e. high computation-efficiency, and high accuracy. Consequently, the controller by having the given setpoints as the input can easily adjust the heat pump output power based on the real-time non-controllable electricity load without creating any peaks and extra costs for the customers.
Med en ökad efterfrågan på förnybara energikällor utvecklas nya system för att upprätthålla framtida infrastruktur vilket kommer säkra dessa nya energikällor. En av de föreslagna lösningarna är att integrera distribuerade energiresurser till olika hushåll för att effektivt kunna tillgodose lokala energikrav. För att möjliggöra en storskalig integrering av flexibla energiresurser det avgörande är att man kan minska slutkundens energi och effektkostnader. Detta kan nås genom att utforma en optimeringsmodell av problemet som tar hänsyn till olika resourses begränsningar osv. för att minska elkosnaden hos slutkunden. Syftet med detta examensarbete är att undersöka en kontrollstrategi för att använda batterier, värmepumpar och andra tillgångar på ett optimalt sätt, genom att producera de optimala börvärdena med hjälp av den utformade optimeringsalgoritmen som tar hänsyn till bland annat marknads och väderdata samt kund beteende. För att producera dessa börvärden användes methoden känslighetsanalys som är en del inom linjär programmering och fokus har varit styrningen av värmepumpar. Resultaten visar att tillämpningen av denna metod leder till att de optimala börvärdena över det icke-kontrollerbara elektriska lasten erhålles, med ett lågt antal optimeringar, dvs att metoden har hög beräknings-effektivitet samt noggrannhet. Följaktligen kan regulatorn med de givna börvärdena som ingång enkelt justera värmepumpens utgångseffekt baserat på realtids icke-kontrollerbar elektriska lasten, utan att skapa några toppar och extra kostnader för kunderna.
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Salque, Tristan. "Méthode d'évaluation des performances annuelles d'un régulateur prédictif de PAC géothermiques sur banc d'essai semi-virtuel." Thesis, Paris, ENMP, 2013. http://www.theses.fr/2013ENMP0095/document.

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Avec le développement récent de régulateurs innovants pour le bâtiment, il devient nécessaire de mettre au point une méthode de test qui soit à la fois rapide, reproductible et réaliste. La méthode développée dans cette thèse permet d'obtenir des performances annuelles de régulateurs de pompes à chaleurs (PAC) géothermiques en seulement quelques jours de test. Basé sur une technique d'émulation déjà utilisée pour des tests de PAC géothermiques et de systèmes solaires combinés, le test permet d'incorporer le régulateur et la PAC réels dans un environnement de simulation calibré par des mesures in-situ. Chaque jour de test correspond à un jour type de chaque mois. Le développement de la méthode consiste à déterminer la séquence de jours types optimale permettant une bonne estimation des performances. La méthode est ensuite testée expérimentalement sur le banc semi-virtuel pour comparer un régulateur prédictif à un régulateur conventionnel sur une saison de chauffage. Pour les besoins de la méthode, un régulateur prédictif de PAC géothermiques est développé. Ce régulateur utilise des réseaux de neurones pour la prévision des données météo et de la température ambiante. Un nouveau module pour la prévision des températures dans le plancher chauffant et les sondes géothermiques est proposé. Le régulateur prédictif est testé par simulation sur une saison de chauffage pour différents climats et types de maisons individuelles. En fonction de la référence, les économies d'énergie réalisées varient entre 6% et 15%
With the recent development of innovative controllers for the building, there is a need to develop a testing method that is fast, reproducible and realistic. The method developed in this study aims to estimate the annual performance of ground source heat pump (GSHP) controllers in only a few days of test. Based on emulation techniques already used for GSHP and solar combined systems, the test immerses the controller and a real GSHP in a simulated environement that is calibrated with in-situ data. Each day of test represents a typical day of the month. The development of the method consists in determining the optimal typical days that ensure an accurate estimation of annual performance. The method is then experimentally tested on the semi-virtual test bench for the comparison of a predictive controller and a conventionnal controller over an entire heating season.To develop the method, a predictive controller for GSHP is elaborated. The controller is based on artificial neural networks used for the prediction of weather data and indoor temperature. A new module for the prediction of floor heating and boreholes fluid temperatures is also proposed. The predictive controller is tested by simulation over a heating season for various climates and types of single family house. According to the reference case, the energy savings vary between 6% and 15%
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Rimec, Daniel. "Multidimensional Assessment For a Case Studied Zero Energy Building : Climate positive buildings with and without a connection to the district heating network." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-54650.

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The purpose of this report is to get an overview of the CO2 reduction possibilities when adopting different renewable energy source, when the case studied building sustains a district heating network connection and when not, and how the renewable energy source flexibilities (Solar and Wind) differ depending on region. The method regards a ETC house that falls into the climate positive category and assesses the reduction when comparing CO2 emissions form the energy demand. The result for the flexibilities is then compared to the BBR demand. The result shows a difference of around 10% in production for the flexibilities when comparing the northern and middle region with the southern. And a decrease between 19-36% gCO2. Comparing a scenario with and without a connection to the district heating network showed that when the ground source heat pump offsets the energy demand, CO2, and cost reductions (6 and 4% respectively) can be seen. With an average installation cost, the payback period for the ground source heat pump can be estimated to be around 4 year. In conclusion the thesis project shows that the climate is a ruling factor when assessing energy questions for the residential sector. It also shows the difference in CO2 and cost that comes with it can be reduced and help mitigated the sectors effects on the environment. This in turn shows that the overall reduction of CO2 for the case studied building follows the demands and goals set by the European commission and gives motivation to expand the construction as cost is also reduced.
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Horáčková, Leona. "Energetická náročnost budovy s téměř nulovou spotřebou energie." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409866.

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The master thesis is focused on rating of buildings with almost zero energy consumption. Theoretical part summarizes general requirements on buildings with almost zero energy consumption. It also discusses other categories of buildings on terms of energy demand and influences and factors affecting the energy performance of buildings. The calculating part comparing three different construction systems of designed family house by means of energy demand with energy assessment and energy performance certificate of buildings.
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Books on the topic "Heat Pump Controller Assessment"

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Chappell, R. N. Industrial heat pump assessment study, final report. Bonneville Power Administration, 1989.

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Pietsch, J. A. Water-loop heat pump systems: Assessment study. Electric Power Research Institute, 1988.

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Book chapters on the topic "Heat Pump Controller Assessment"

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Reda, Francesco. "Performance Assessment in Different Climates." In Solar Assisted Ground Source Heat Pump Solutions, 31–52. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-49698-6_4.

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Malenković, Ivan, Peter Pärisch, Sara Eicher, Jacques Bony, and Michael Hartl. "Performance and its assessment." In Solar and Heat Pump Systems for Residential Buildings, 63–102. Berlin, Germany: Wilhelm Ernst & Sohn, 2015. http://dx.doi.org/10.1002/9783433604830.ch04.

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Acar, Canan, and Ibrahim Dincer. "Performance Assessment of a Two–stage Heat Pump–Drying System." In Progress in Sustainable Energy Technologies: Generating Renewable Energy, 149–64. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07896-0_7.

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Daim, Tugrul U., Craig Kensel, and Kenny Phan. "Assessment of Energy Efficiency Technologies: Case of Heat Pump Water Heaters." In Assessment and Simulation Tools for Sustainable Energy Systems, 183–202. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-5143-2_9.

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Chow, Colton, and Jean Duquette. "Assessment of a Heat Pump-Based Wastewater Heat Recovery System for a Canadian University Campus." In Springer Proceedings in Energy, 146–67. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-00105-6_9.

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Li, Hui, Pei-Yong Duan, and Chen-Guang Ning. "Design of a Multifunctional CAN Bus Controller for a Ground Source Heat Pump System." In Electronics, Communications and Networks V, 177–85. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-0740-8_21.

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Ozcan, Hasan, and Ibrahim Dincer. "Exergy Analysis and Environmental Impact Assessment of Solar-Driven Heat Pump Drying Systems." In Causes, Impacts and Solutions to Global Warming, 839–58. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-7588-0_44.

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Tyszer, Magdalena, Barbara Raczyńska, and Barbara Tomaszewska. "Assessment of the Impact of the Local Geological Structure on the Efficiency of Ground-Source Heat Pump." In Springer Proceedings in Energy, 689–700. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-13888-2_67.

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Talpiga, Mugurel-Florin, Eugen Mandric, and Florin Iordache. "Numerical Assessment of a Dynamic Daily Heating Unit Using Both Solar Collector and Heat Pump Coupled in a Dynamic Working." In Springer Proceedings in Energy, 296–313. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-63215-5_22.

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Farrar, David J. "The HeartMate II™ Continuous-Flow Left Ventricular Assist System." In Mechanical Circulatory Support, 70–77. Oxford University Press, 2019. http://dx.doi.org/10.1093/med/9780190909291.003.0011.

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The HeartMate II™ Left Ventricular Assist System has been implanted in more than 26,000 patients and is the most widely used and studied durable mechanical circulatory support device in patients with advanced heart failure. The device is intended for use as bridge to transplantation in candidates at risk of imminent death from non-reversible left ventricular (LV) failure and for destination therapy for use in patients with end-stage LV failure. This chapter describes each component of the system, the mechanisms of the pump itself, the physiology of blood flow under different pump speeds and pressure gradients, and ways to prevent pump thrombus. In addition, the functions and interface of the System Controller and System Monitor are detailed, including the settings displayed on the monitor and the type of alarms provided, as well as their appearance on the interface. The chapter closes with a discussion of how a ramped-speed study using echocardiography and hemodynamic assessment can identify the pump speed that provides the desired level of cardiac support for each patient.
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Conference papers on the topic "Heat Pump Controller Assessment"

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Xian, Gong, Sun Jianhua, and Zou Hai. "Assessment on an Intelligent Controller of Marine Condenser." In 2016 24th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icone24-60657.

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At present, simulation research on condenser mostly focuses on the one of power plant. While little attention is paid on the marine one. The marine condenser is different from the one of power plant. One difference between them is that marine condenser limited by the hull space is much smaller than the one of power plant. Another difference is that marine condenser usually runs in condition that steam load changes greatly and frequently. In addition, the temperature of cooling water changes with seasons and maritime space. When the ship makes an ocean-going voyage, the temperature of cooling water varies obviously, which has a negative effect on the control system. Therefore, simulation research to the dynamic characteristic of marine condenser is carried on by this paper. The vacuum and the condensate supercooling degree are the main operating parameters for a condenser. In this paper, a mathematical model for marine condenser is established. The dynamic variation of each parameter is monitored by this model. Then an expert control system is designed. The condenser vacuum and supercooling degree are controlled by the flow rates of cooling water, air-blend and steam jet for deaerating. The deaerating steam bubbles which are not absorbed completely by condensate water, have a negative impaction on the condenser vacuum. The deaerating steam bubbles heating the condensation water to be exactly saturated is calculated. Referring to it, the fluctuation of condenser vacuum is filtered. So the negative influence on condenser control system can be remitted. The temperature of water replenishing is usually lower than that of condensate water in condenser heat well. And the water is replenished into the heat well part. So water replenishing would increase the supercooling degree of condensate water. This paper adopts the simulation experiment method to gain the expert knowledge of condenser control. According to power level, inlet temperature of cooling water, the messages of operating modes and sensors, the control system regulates the regulating valves for turbo circulating pump of cooling water, air extractor and steam jet deaerator to change the flow rates of cooling water, air-blend and steam jet for deaerating, so as to achieve automatic control of condenser vacuum and supercooling degree. Finally, two PID controllers are added as well, to counteract the adverse effect, enhance anti-interference ability and optimize control performance of intelligent control system. Simulations of varying load and cooling water temperature are done. Results show that the intelligent control system could effectively control condenser vacuum and supercooling degree under different power level and variable temperature of cooling water condition.
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Alshinaiber, Fahad, Yhossie Windiarto, Mayadah Alhashem, and Rui Pessoa Rodrigues. "High Rate Slim ESP Viability Assessment in the Field." In SPE Middle East Artificial Lift Conference and Exhibition. SPE, 2022. http://dx.doi.org/10.2118/206943-ms.

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Abstract Producing oil at full potential with an electrical submersible pump (ESP) in a slim well remains a challenge in the petroleum industry. A conventional slim ESP system is limited in produced oil delivery rate with an associated risk of damaging the motor lead extension (MLE) of the ESP during the running in hole due to tight clearance. Finding a high rate new slim ESP technology is crucial to enable production of wells at full potential and eliminate slot recovery. This paper shares the success stories of testing two high rate slim ESP installations, and provides the advantages and disadvantages for each of the two approaches for high rate slim ESP design. The high rate slim ESP design options were assessed through field trials collaborating with different manufacturers. The slim ESP viability evaluation metrics were maximum rates, ESP performances, completion installation simplicity and surface controller compatibility. These metrics ensure eliminating unnecessary costs of ESP replacement in the field. The first design option is an inverted ESP design with an induction motor installed at the top. Such a design is advantageous in allowing a pump with a bigger outer diameter (OD), eliminating MLE installation on the pump housing due to an increased clearance, and consequently achieving a higher rate. The second design option uses a permanent magnetic motor (PMM) in a standard ESP configuration. The second design with the smaller ESP OD allows high motor speed, thus providing a higher head capacity and higher flow rate. A modification in the variable speed drive (VSD) design is required to enable controlling the PMM. The field trial result revealed multiple benefits of the high rate slim ESP systems in the field. The high-speed system that utilizes PMM retains the standard ESP configuration, which simplifies well completion and avoids installation complexity. The reduced ESP OD provides more clearance in the well, leading to minimized possible MLE damage during running in hole. Although the VSD modification is possible, the PMM maximum speed will be limited by the maximum capacity of the existing transformer installed in the platform. Finally, both systems lead to a significant cost avoidance by eliminating the need for slot recovery of the produced well at full potential in a slim-well, and avoiding unnecessary replacement of ESP surface equipment. The two systems were already successfully evaluated with a continuous run for more than 365 days without any issues.
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Dumarcher, V., J. L. Bourrier, P. Chaucheprat, and D. Boulegue. "Assessment and Management of Aging in Phenix Nuclear Power Plant." In 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89690.

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The combination of one or several processes of ruins can involve the materials failure of a nuclear power plant. These processes arise from the external agents action such as the pressure, the mechanical efforts, the heat flows and the radiations constitute the whole of the “actions” of the surrounding medium. The prolongation and the repetition of these effects can involve a deterioration of the machine. In accordance with the decree of February 26, 1974, the PWR operator must be firstly, sure that the system is controlled according to the situations considered in the file of dimensioning and secondly, be able to know anytime the life of the equipment. The physical phenomena which cause the structures ruin are less complex in the PWR than in the SFR. In the SFR, the high temperatures imposed on components for long periods can involve a significant creep. In the course of time, this deformations accelerate the release of fatigue cracks. To consider the creep, the reactor lifespan is correlated at the numbers of thermals transients envisaged initially. To realize the management of aging in Phenix power plant, it is necessary to carry out an individualized monitoring of the structures and not only on the vessel. We must ensure the good state and/or the correct operation of the significant stations for safety which are the control of the reactivity, the movement of control rods, the primary sodium containment and the decay heat removal. For that, we monitor the main vessel, the conical skirt, the IHX and the Core Cover Plug. A profound knowledge of the thermal transients of the past is necessary to carry out an effective assessment. In order to guarantee that any harmful situation is well taken into the management of aging, we monitor permanently certain measurements (primary and secondary pump speed, hot and cold pool temperatures, IHX-main vessel and reactor roof temperatures). We present in the article the scientific method used in the Physics Section. A logical diagram specific to the type of situation and the structure allows to associate the harmful transient at a identical situation which has been happened in the past. During the last two cycles, the nuclear power plant has sustained 34 startup (20 during the 51st cycle and 14 during the 52nd cycle). After two cycles of operation, there is approximately 70 to 80% of occurrences authorized for the whole of the structures. For the last 4 cycles, the number of transients to come will remain quite lower than the number dimensioned initially.
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Wallace, Matt, Prashant Mhaskar, John House, and Tim Salsbury. "Offset-free model predictive controller of a heat pump." In 2014 American Control Conference - ACC 2014. IEEE, 2014. http://dx.doi.org/10.1109/acc.2014.6859114.

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Tuan, Chi-I., Ting-Chien Chen, Yi-Lung Yeh, and Chi-Jen Chen. "Appling a heat pump to integrate heat sources and a perform assessment." In 2011 International Conference on Consumer Electronics, Communications and Networks (CECNet). IEEE, 2011. http://dx.doi.org/10.1109/cecnet.2011.5769448.

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"Uncertainty assessment of the hydraulics properties surrounding a standing column well with a thermal response test." In International Ground Source Heat Pump Association. International Ground Source Heat Pump Association, 2022. http://dx.doi.org/10.22488/okstate.22.000021.

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Aditya, G. Riyan, Olga Mikhaylova, Guillermo A. Narsilio, and Ian W. Johnston. "Financial assessment of ground source heat pump systems against other selected heating and cooling systems for Australian conditions." In International Ground Source Heat Pump Association. International Ground Source Heat Pump Association, 2018. http://dx.doi.org/10.22488/okstate.18.000003.

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Cazorla-Marín, Antonio, Carla Montagud, José M. Corberán, and Javier Marchante-Avellaneda. "Seasonal performance assessment of a dual source heat pump system for heating, cooling and domestic hot water production." In International Ground Source Heat Pump Association. International Ground Source Heat Pump Association, 2018. http://dx.doi.org/10.22488/okstate.18.000014.

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Khosravi, Mohammad, Annika Eichler, Nicolas Schmid, Roy S. Smith, and Philipp Heer. "Controller Tuning by Bayesian Optimization An Application to a Heat Pump." In 2019 18th European Control Conference (ECC). IEEE, 2019. http://dx.doi.org/10.23919/ecc.2019.8795801.

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Yang, Rui, and Lingfeng Wang. "Implementing Intelligent Water Loop Heat Pump Controller on Cloud for Sustainable Buildings." In 2019 IEEE International Conference on Industrial Cyber Physical Systems (ICPS). IEEE, 2019. http://dx.doi.org/10.1109/icphys.2019.8780321.

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Reports on the topic "Heat Pump Controller Assessment"

1

Anderson, B. D0 HVAC System Heat Pump Controller Programming, Networking, and Operating Information. Office of Scientific and Technical Information (OSTI), December 1999. http://dx.doi.org/10.2172/1032090.

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Chappell, R., S. Priebe, and G. Wilfert. Industrial Heat Pump Assessment Study : Final Report. Office of Scientific and Technical Information (OSTI), March 1989. http://dx.doi.org/10.2172/5185828.

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Baxter, Van D. Integrated Heat Pump HVAC Systems for Near-Zero-Energy Homes - Business Case Assessment. Office of Scientific and Technical Information (OSTI), May 2007. http://dx.doi.org/10.2172/932624.

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Shoukas, Gregory, Eric Bonnema, Gokulram Paranjothi, Ramin Faramarzi, and Lauren Klun. Performance Assessment of High Efficiency Variable Speed Air-Source Heat Pump in Cold Climate Applications. Office of Scientific and Technical Information (OSTI), February 2022. http://dx.doi.org/10.2172/1847877.

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Schubert, Maike, and Daniel Zenhäusern. Performance Assessment of Example PVT-Systems. IEA SHC Task 60, December 2020. http://dx.doi.org/10.18777/ieashc-task60-2020-0009.

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Abstract:
The performance of 26 PVT-Systems was analysed and compared in IEA-SHC Task 60. The systems are located in countries with different climatic conditions. The applications range from direct domestic hot water production and heating of public swimming pools to heat pump systems with PVT as the main heat source of the heat pump. The Key Performance Indicators (KPIs) determined for the different PVT solutions give the possibility to compare the systems despite their diversity. The goal was to show the potential of PVT collectors in different fields of application. The results show that the integration of PVT collectors in different kinds of well-dimensioned systems leads to competitive solutions, both from an energy and a financial perspective. Additionally the answers to a survey about control strategies for PVT systems, showing some main problems and possible solutions, are summarised.
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Assessment and development of an advanced heat pump for recovery of volatile organic compounds. Office of Scientific and Technical Information (OSTI), June 1992. http://dx.doi.org/10.2172/5074142.

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Assessment and development of an advanced heat pump for recovery of volatile organic compounds. Final report. Office of Scientific and Technical Information (OSTI), June 1992. http://dx.doi.org/10.2172/10150254.

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