Simulation and experimental study of solar-absorption heat transformer integrating with two-stage high temperature vapor compression heat pump
In this study, simulation and experiment studies of a 10 kW solar H2O–LiBr absorption heat transformer (AHT) integrating with a two-stage vapor compression heat pump (VCHP) were carried out. The whole system was named as compression/absorption heat transformer (CAHT). The VCHP was used to recover r...
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doaj-a485ca74d20c4a3880310c39955bb4392020-11-25T00:44:59ZengElsevierCase Studies in Thermal Engineering2214-157X2014-11-014C16617410.1016/j.csite.2014.09.007Simulation and experimental study of solar-absorption heat transformer integrating with two-stage high temperature vapor compression heat pumpNattaporn Chaiyat0Tanongkiat Kiatsiriroat1School of Renewable Energy, Maejo University, Chiang Mai, ThailandDepartment of Mechanical Engineering, Chiang Mai University, Chiang Mai, Thailand In this study, simulation and experiment studies of a 10 kW solar H2O–LiBr absorption heat transformer (AHT) integrating with a two-stage vapor compression heat pump (VCHP) were carried out. The whole system was named as compression/absorption heat transformer (CAHT). The VCHP was used to recover rejected heat at the AHT condenser which was transferred back to the AHT evaporator at a higher temperature. The AHT unit took solar heat from a set of flat-plate solar collectors in parallel connection. R-134a and R-123 were refrigerants in the VCHP cycle. From the simulation, the total cycle coefficient (COP) of the solar-CAHT was 0.71 compared with 0.49 of the normal solar-AHT. From the experiment, the total cycle COPs of the solar-CAHT and the solar-AHT were 0.62 and 0.39, respectively. The experimental results were lower than those of the simulated models due to the oversize of the experimental compressor. The annual expense of the solar-CAHT was found to be 5113 USD which was lower than 5418 USD of the solar-AHT. So it could be concluded that the modified unit was beneficial than the normal unit in terms of energy efficiency and economic expense. http://www.sciencedirect.com/science/article/pii/S2214157X14000355Absorption heat transformer2-Stage vapor compression heat pumpSolar energyCompression/absorption heat transformerAnnual expense |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Nattaporn Chaiyat Tanongkiat Kiatsiriroat |
spellingShingle |
Nattaporn Chaiyat Tanongkiat Kiatsiriroat Simulation and experimental study of solar-absorption heat transformer integrating with two-stage high temperature vapor compression heat pump Case Studies in Thermal Engineering Absorption heat transformer 2-Stage vapor compression heat pump Solar energy Compression/absorption heat transformer Annual expense |
author_facet |
Nattaporn Chaiyat Tanongkiat Kiatsiriroat |
author_sort |
Nattaporn Chaiyat |
title |
Simulation and experimental study of solar-absorption heat transformer integrating with two-stage high temperature vapor compression heat pump |
title_short |
Simulation and experimental study of solar-absorption heat transformer integrating with two-stage high temperature vapor compression heat pump |
title_full |
Simulation and experimental study of solar-absorption heat transformer integrating with two-stage high temperature vapor compression heat pump |
title_fullStr |
Simulation and experimental study of solar-absorption heat transformer integrating with two-stage high temperature vapor compression heat pump |
title_full_unstemmed |
Simulation and experimental study of solar-absorption heat transformer integrating with two-stage high temperature vapor compression heat pump |
title_sort |
simulation and experimental study of solar-absorption heat transformer integrating with two-stage high temperature vapor compression heat pump |
publisher |
Elsevier |
series |
Case Studies in Thermal Engineering |
issn |
2214-157X |
publishDate |
2014-11-01 |
description |
In this study, simulation and experiment studies of a 10 kW solar H2O–LiBr absorption heat transformer (AHT) integrating with a two-stage vapor compression heat pump (VCHP) were carried out. The whole system was named as compression/absorption heat transformer (CAHT). The VCHP was used to recover rejected heat at the AHT condenser which was transferred back to the AHT evaporator at a higher temperature. The AHT unit took solar heat from a set of flat-plate solar collectors in parallel connection. R-134a and R-123 were refrigerants in the VCHP cycle. From the simulation, the total cycle coefficient (COP) of the solar-CAHT was 0.71 compared with 0.49 of the normal solar-AHT. From the experiment, the total cycle COPs of the solar-CAHT and the solar-AHT were 0.62 and 0.39, respectively. The experimental results were lower than those of the simulated models due to the oversize of the experimental compressor. The annual expense of the solar-CAHT was found to be 5113 USD which was lower than 5418 USD of the solar-AHT. So it could be concluded that the modified unit was beneficial than the normal unit in terms of energy efficiency and economic expense.
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topic |
Absorption heat transformer 2-Stage vapor compression heat pump Solar energy Compression/absorption heat transformer Annual expense |
url |
http://www.sciencedirect.com/science/article/pii/S2214157X14000355 |
work_keys_str_mv |
AT nattapornchaiyat simulationandexperimentalstudyofsolarabsorptionheattransformerintegratingwithtwostagehightemperaturevaporcompressionheatpump AT tanongkiatkiatsiriroat simulationandexperimentalstudyofsolarabsorptionheattransformerintegratingwithtwostagehightemperaturevaporcompressionheatpump |
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