The Experts below are selected from a list of 315 Experts worldwide ranked by ideXlab platform
Walter J Eugster - One of the best experts on this subject based on the ideXlab platform.
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sustainability aspects of geothermal heat Pump Operation with experience from switzerland
Geothermics, 2010Co-Authors: Ladislaus Rybach, Walter J EugsterAbstract:Geothermal heat Pumps are the key to the utilization of the ubiquitous shallow geothermal resources. Theoretical and experimental studies, performed in Switzerland over several years, have established a solid scientific base of reliable long-term Operation of borehole heat exchanger-coupled heat Pump systems. Proper design, taking into account local conditions like ground properties and building needs, ensures the sustainability of production from systems with single and multiple borehole heat exchangers. Long-term experience acquired at Operational objects confirms the predictions.
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Sustainability aspects of geothermal heat Pump Operation, with experience from Switzerland
Geothermics, 2010Co-Authors: Ladislaus Rybach, Walter J EugsterAbstract:Geothermal heat Pumps are the key to the utilization of the ubiquitous shallow geothermal resources. Theoretical and experimental studies, performed in Switzerland over several years, have established a solid scientific base of reliable long-term Operation of borehole heat exchanger-coupled heat Pump systems. Proper design, taking into account local conditions like ground properties and building needs, ensures the sustainability of production from systems with single and multiple borehole heat exchangers. Long-term experience acquired at Operational objects confirms the predictions. ?? 2010 Elsevier Ltd.
Ladislaus Rybach - One of the best experts on this subject based on the ideXlab platform.
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sustainability aspects of geothermal heat Pump Operation with experience from switzerland
Geothermics, 2010Co-Authors: Ladislaus Rybach, Walter J EugsterAbstract:Geothermal heat Pumps are the key to the utilization of the ubiquitous shallow geothermal resources. Theoretical and experimental studies, performed in Switzerland over several years, have established a solid scientific base of reliable long-term Operation of borehole heat exchanger-coupled heat Pump systems. Proper design, taking into account local conditions like ground properties and building needs, ensures the sustainability of production from systems with single and multiple borehole heat exchangers. Long-term experience acquired at Operational objects confirms the predictions.
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Sustainability aspects of geothermal heat Pump Operation, with experience from Switzerland
Geothermics, 2010Co-Authors: Ladislaus Rybach, Walter J EugsterAbstract:Geothermal heat Pumps are the key to the utilization of the ubiquitous shallow geothermal resources. Theoretical and experimental studies, performed in Switzerland over several years, have established a solid scientific base of reliable long-term Operation of borehole heat exchanger-coupled heat Pump systems. Proper design, taking into account local conditions like ground properties and building needs, ensures the sustainability of production from systems with single and multiple borehole heat exchangers. Long-term experience acquired at Operational objects confirms the predictions. ?? 2010 Elsevier Ltd.
Yaxin Su - One of the best experts on this subject based on the ideXlab platform.
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theoretical study of the performance of a novel pv e roof module for heat Pump Operation
Energy Conversion and Management, 2011Co-Authors: Xudong Zhao, Xingxing Zhang, Saffa Riffat, Yaxin SuAbstract:In this paper, a novel PV/e roof module was designed to act as the roof element, electricity generator and the evaporator of a heat Pump system. The modules, in conjunction with a heat Pump, are able to provide heat and power supply to buildings with an enhanced efficiency. Energy profiles of the PV/e modules and modules-based heat Pump system were analysed and temperature distribution across the module layers was studied. It was found that the PV/e roof modules-based heat Pump system can achieve significant improvement in thermal and electrical efficiencies. Variation of the system efficiencies (thermal, electrical and total) with a number of factors, i.e., top cover, PV cells, evaporation and condensation temperature of the heat Pump was investigated, which led to suggestion of the optimised system configuration and operating conditions. The study indicated that the combined system should operate at 10 °C of evaporation and 60 °C of condensation temperature. Borosilicate as a top cover has better thermal performance than polycarbonate and glass; whilst the mono-crystalline photovoltaic cells are of higher electrical efficiency over the poly-crystalline and thin-films. Under a typical Nottingham (UK) operating condition, the modules would achieve 55% of thermal efficiency and 19% of electrical efficiency, while the module-based heat Pump system would have an overall efficiency of above 70%. It was also addressed that the integration of the PV cells and evaporation coil into a prefabricated roof would lead to large saving in both capital and running costs over separate arrangements of PV, heat Pump and roof structure.
Omid Maddah - One of the best experts on this subject based on the ideXlab platform.
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Investigation of the effect of using various HFC refrigerants in geothermal heat Pump with residential heating applications
Journal of Thermal Analysis and Calorimetry, 2020Co-Authors: Mahdi Deymi-dashtebayaz, Saeed Maddah, Marjan Goodarzi, Omid MaddahAbstract:In the present investigation, the impact of various refrigerants on the efficiency of the geothermal heat Pump Operation is investigated. Appropriate working range of five HFC refrigerants such as R125, R134A, R404A, R407C, and R507A for using a geothermal heat Pump is studied. Also, the energy and exergy analysis is used to investigate the influence of varying temperatures of the exhaust fluid from the geothermal source on heat Pump Operation. The critical parameters, such as coefficient of performance (COP), exergy efficiency, and exergy destruction for various components, are calculated. The results show that, in the geothermal heat Pump cycle, R134A and R125 refrigerants have the highest and lowest COP and exergy efficiency, respectively. Moreover, enhancing the temperature of the exhaust fluid from the geothermal source results in an enhancement of the COP. For the mentioned refrigerants, the exergy destruction due to the compressor, as the primary energy-consuming equipment, is obtained between 26.7 and 27.3% range relative due to the overall system. The outcomes achieved in present research may provide the instructions for the design and optimization of efficient geothermal heat Pump systems.
Xudong Zhao - One of the best experts on this subject based on the ideXlab platform.
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theoretical study of the performance of a novel pv e roof module for heat Pump Operation
Energy Conversion and Management, 2011Co-Authors: Xudong Zhao, Xingxing Zhang, Saffa Riffat, Yaxin SuAbstract:In this paper, a novel PV/e roof module was designed to act as the roof element, electricity generator and the evaporator of a heat Pump system. The modules, in conjunction with a heat Pump, are able to provide heat and power supply to buildings with an enhanced efficiency. Energy profiles of the PV/e modules and modules-based heat Pump system were analysed and temperature distribution across the module layers was studied. It was found that the PV/e roof modules-based heat Pump system can achieve significant improvement in thermal and electrical efficiencies. Variation of the system efficiencies (thermal, electrical and total) with a number of factors, i.e., top cover, PV cells, evaporation and condensation temperature of the heat Pump was investigated, which led to suggestion of the optimised system configuration and operating conditions. The study indicated that the combined system should operate at 10 °C of evaporation and 60 °C of condensation temperature. Borosilicate as a top cover has better thermal performance than polycarbonate and glass; whilst the mono-crystalline photovoltaic cells are of higher electrical efficiency over the poly-crystalline and thin-films. Under a typical Nottingham (UK) operating condition, the modules would achieve 55% of thermal efficiency and 19% of electrical efficiency, while the module-based heat Pump system would have an overall efficiency of above 70%. It was also addressed that the integration of the PV cells and evaporation coil into a prefabricated roof would lead to large saving in both capital and running costs over separate arrangements of PV, heat Pump and roof structure.
