Design and Construction of a Small Ammonia Heat Pump
In view of the fact that most of the synthetic refrigerants, in case of leakage or release, are harmful to the environment by contributing in global warming or depleting stratospheric ozone layer, many research works have been done recently to find alternative refrigerants posing no or negligible th...
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ndltd-UPSALLA1-oai-DiVA.org-kth-644112013-01-08T13:51:24ZDesign and Construction of a Small Ammonia Heat PumpengA Monfared, BehzadKTH, Tillämpad termodynamik och kylteknik2010ammoniaheat pumpminichannelheat exchangerrefrigerant chargeCOPtap water heatingspace heatingdomestic hot watervariable speedcompressorIn view of the fact that most of the synthetic refrigerants, in case of leakage or release, are harmful to the environment by contributing in global warming or depleting stratospheric ozone layer, many research works have been done recently to find alternative refrigerants posing no or negligible threat to the environment. Among alternative refrigerants, ammonia, a natural refrigerant with zero Global Warming Potential (GWP) and Ozone Depletion Potential (ODP), can be a sensible choice.Although ammonia has been used for many years in large industrial systems, its application in small units is rare. In this project a small heat pump with about 7 kW heating capacity at -5 °C and +40 °C evaporation and condensation temperatures is designed and built to work with ammonia as refrigerant. The heat pump is expected to produce enough heat to keep a single-family house warm in Sweden and to provide tap hot water for the house. After successful completion of this project, it is planned to install the heat pump in a house to test it throughout a heating season to study its performance in real working conditions.Since ammonia is flammable and toxic in high concentrations, the refrigerant charge is tried to be kept low in the heat pump to reduce the risk of fire or poisoning in case of unwanted release of refrigerant to the surroundings. The compact design of the heat pump helps reducing the refrigerant charge. Besides, considering the limited space normally reserved for installation of a heat pump in a house, the compact design of the heat pump is necessary. Student thesisinfo:eu-repo/semantics/bachelorThesistexthttp://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-64411application/pdfinfo:eu-repo/semantics/openAccess |
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English |
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ammonia heat pump minichannel heat exchanger refrigerant charge COP tap water heating space heating domestic hot water variable speed compressor |
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ammonia heat pump minichannel heat exchanger refrigerant charge COP tap water heating space heating domestic hot water variable speed compressor A Monfared, Behzad Design and Construction of a Small Ammonia Heat Pump |
description |
In view of the fact that most of the synthetic refrigerants, in case of leakage or release, are harmful to the environment by contributing in global warming or depleting stratospheric ozone layer, many research works have been done recently to find alternative refrigerants posing no or negligible threat to the environment. Among alternative refrigerants, ammonia, a natural refrigerant with zero Global Warming Potential (GWP) and Ozone Depletion Potential (ODP), can be a sensible choice.Although ammonia has been used for many years in large industrial systems, its application in small units is rare. In this project a small heat pump with about 7 kW heating capacity at -5 °C and +40 °C evaporation and condensation temperatures is designed and built to work with ammonia as refrigerant. The heat pump is expected to produce enough heat to keep a single-family house warm in Sweden and to provide tap hot water for the house. After successful completion of this project, it is planned to install the heat pump in a house to test it throughout a heating season to study its performance in real working conditions.Since ammonia is flammable and toxic in high concentrations, the refrigerant charge is tried to be kept low in the heat pump to reduce the risk of fire or poisoning in case of unwanted release of refrigerant to the surroundings. The compact design of the heat pump helps reducing the refrigerant charge. Besides, considering the limited space normally reserved for installation of a heat pump in a house, the compact design of the heat pump is necessary. |
author |
A Monfared, Behzad |
author_facet |
A Monfared, Behzad |
author_sort |
A Monfared, Behzad |
title |
Design and Construction of a Small Ammonia Heat Pump |
title_short |
Design and Construction of a Small Ammonia Heat Pump |
title_full |
Design and Construction of a Small Ammonia Heat Pump |
title_fullStr |
Design and Construction of a Small Ammonia Heat Pump |
title_full_unstemmed |
Design and Construction of a Small Ammonia Heat Pump |
title_sort |
design and construction of a small ammonia heat pump |
publisher |
KTH, Tillämpad termodynamik och kylteknik |
publishDate |
2010 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-64411 |
work_keys_str_mv |
AT amonfaredbehzad designandconstructionofasmallammoniaheatpump |
_version_ |
1716530729032089600 |