scholarly journals Performance Evaluation of the ThermoLift Natural Gas Fired Air Conditioner and Cold-Climate Heat Pump

2019 ◽  
Author(s):  
Peter Hofbauer ◽  
Paul Schwartz ◽  
Vishaldeep Sharma
Keyword(s):  
Performance Evaluation ◽  
Natural Gas ◽  
Heat Pump ◽  
Cold Climate ◽  
Air Conditioner

Performance evaluation of propane heat pump system for electric vehicle in cold climate

2018 ◽  
Vol 95 ◽  
pp. 51-60 ◽  
Author(s):  
Cichong Liu ◽  
Yun Zhang ◽  
Tianyuan Gao ◽  
Junye Shi ◽  
Jiangping Chen ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Electric Vehicle ◽  
Heat Pump ◽  
Cold Climate ◽  
Pump System ◽  
Heat Pump System

scholarly journals ThermoLift – A Natural Gas Fired Air Conditioner and Heat Pump

2018 ◽  
Author(s):  
Paul Schwartz ◽  
Peter Hofbauer ◽  
Jonathan Haas ◽  
Diana Brehob
Keyword(s):  
Natural Gas ◽  
Heat Pump ◽  
Air Conditioner

scholarly journals Energy modelling and field testing of natural gas absorption heat pump system in cold climate - Canada

2021 ◽  
Author(s):  
Kajen Ethirveerasingham
Keyword(s):  
Natural Gas ◽  
Heat Pump ◽  
Water Solution ◽  
Cold Climate ◽  
Gas Absorption ◽  
Utilization Efficiency ◽  
Pump System ◽  
Absorption Heat Pump ◽  
Heat Pump System ◽  
Part Load

The feasibility of a Natural Gas Absorption Heat Pump (GAHP) was investigated through the use of a technology screening tool developed in Excel and TRNSYS simulations that used experimentally evaluated performance curves using 50% propylene glycol (PG)/water solution. The Excel tool was used for cost and greenhouse gas (GHG) reductions analysis and indicated that the GAHP was cost effective compared to an Air-Source Heat Pump (ASHP) in locations where the primary heating fuel was natural gas and had significantly lower GHG emissions compared to a 90% efficient natural gas furnace. During the heating season, it was found that the system only had more than 100% heating Gas Utilization Efficiency (GUE) at -1.5°C or above and would go as low at 66% GUE at nominal flow and return temperatures. Part load performance was analyzed using experimental data and implemented in a TRNSYS model. The TRNSYS model shows significant losses from part load performance and 50% PG/water derating for both heating and cooling season due to excessive cycling.

Performance evaluation of R1234yf heat pump system for an electric vehicle in cold climate

2020 ◽  
Vol 115 ◽  
pp. 117-125 ◽  
Author(s):  
Wanyong Li ◽  
Rui Liu ◽  
Yusheng Liu ◽  
Dandong Wang ◽  
Junye Shi ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Electric Vehicle ◽  
Heat Pump ◽  
Cold Climate ◽  
Pump System ◽  
Heat Pump System

scholarly journals Energy modelling and field testing of natural gas absorption heat pump system in cold climate - Canada

2021 ◽  
Author(s):  
Kajen Ethirveerasingham
Keyword(s):  
Natural Gas ◽  
Heat Pump ◽  
Water Solution ◽  
Cold Climate ◽  
Gas Absorption ◽  
Utilization Efficiency ◽  
Pump System ◽  
Absorption Heat Pump ◽  
Heat Pump System ◽  
Part Load

The feasibility of a Natural Gas Absorption Heat Pump (GAHP) was investigated through the use of a technology screening tool developed in Excel and TRNSYS simulations that used experimentally evaluated performance curves using 50% propylene glycol (PG)/water solution. The Excel tool was used for cost and greenhouse gas (GHG) reductions analysis and indicated that the GAHP was cost effective compared to an Air-Source Heat Pump (ASHP) in locations where the primary heating fuel was natural gas and had significantly lower GHG emissions compared to a 90% efficient natural gas furnace. During the heating season, it was found that the system only had more than 100% heating Gas Utilization Efficiency (GUE) at -1.5°C or above and would go as low at 66% GUE at nominal flow and return temperatures. Part load performance was analyzed using experimental data and implemented in a TRNSYS model. The TRNSYS model shows significant losses from part load performance and 50% PG/water derating for both heating and cooling season due to excessive cycling.

A Techno-economic Analysis of Heat-Pump Entering Fluid Temperatures, and CO2 Emissions for Hybrid Ground Source Heat Pump Systems

2021 ◽  
Author(s):  
Hiep V. Nguyen ◽  
Ying Lam E. Law ◽  
Xiaoyan Zhou ◽  
Philip R. Walsh ◽  
Wey H. Leong ◽  
...  
Keyword(s):  
Natural Gas ◽  
Co2 Emissions ◽  
Heat Pump ◽  
Heat Pumps ◽  
Economic Effects ◽  
Fluid Temperature ◽  
Ground Source Heat Pump ◽  
Air Conditioner ◽  
Ground Source Heat Pumps ◽  
Ground Source

Hybrid ground-source heat pumps (GSHPs) that include a ground loop for the base heating and cooling needs, and an auxiliary system (natural gas boiler and electric air conditioner) for peak loads, are an economical and environmentally cleaner alternative to conventional systems. For a ground-source heat pump (GSHP) system, the choice of entering fluid temperature (EFT) to the heat pump plays a crucial role in determining system efficiency of and operating costs. To continue expanding the knowledge base of efficiently sizing GSHPs as a component of a hybrid system, this study explores the economic effects of choosing an EFT for a heat pump. In addition, system CO2 emissions are calculated and analyzed for a variety of building types. Using a computational approach to size hybrid GSHP systems recently published in [Alavy et al., Renewable Energy, 57 (2013) 404-412], the effects of optimizing EFT for a heat pump, and CO2 emissions were studied for a variety of commercial installations. In the present study, using ten buildings situated in Southern Ontario, Canada, by varying cooling and heating EFTs for a heat pump, savings ranging from 0.47% to 3.6% can be achieved compared to using a fixed EFT pairfor a heat pump. In addition, comparisons were made between the CO2 emissions of optimally sized (based on economic factors) hybrid GHSPs and those of non-hybridized GSHPs. Both the optimally-sized hybrid GHSPs, and the non-hybridized GSHPs significantly reduce CO2 emissions compared to the use of conventional natural gas/electrical systems. The additional environmental benefit of the non-hybridized GSHPs over that of the optimally-sized hybrid GSHPs was found to be negligible in most cases analyzed.

A Techno-economic Analysis of Heat-Pump Entering Fluid Temperatures, and CO2 Emissions for Hybrid Ground Source Heat Pump Systems

2021 ◽  
Author(s):  
Hiep V. Nguyen ◽  
Ying Lam E. Law ◽  
Xiaoyan Zhou ◽  
Philip R. Walsh ◽  
Wey H. Leong ◽  
...  
Keyword(s):  
Natural Gas ◽  
Co2 Emissions ◽  
Heat Pump ◽  
Heat Pumps ◽  
Economic Effects ◽  
Fluid Temperature ◽  
Ground Source Heat Pump ◽  
Air Conditioner ◽  
Ground Source Heat Pumps ◽  
Ground Source

Hybrid ground-source heat pumps (GSHPs) that include a ground loop for the base heating and cooling needs, and an auxiliary system (natural gas boiler and electric air conditioner) for peak loads, are an economical and environmentally cleaner alternative to conventional systems. For a ground-source heat pump (GSHP) system, the choice of entering fluid temperature (EFT) to the heat pump plays a crucial role in determining system efficiency of and operating costs. To continue expanding the knowledge base of efficiently sizing GSHPs as a component of a hybrid system, this study explores the economic effects of choosing an EFT for a heat pump. In addition, system CO2 emissions are calculated and analyzed for a variety of building types. Using a computational approach to size hybrid GSHP systems recently published in [Alavy et al., Renewable Energy, 57 (2013) 404-412], the effects of optimizing EFT for a heat pump, and CO2 emissions were studied for a variety of commercial installations. In the present study, using ten buildings situated in Southern Ontario, Canada, by varying cooling and heating EFTs for a heat pump, savings ranging from 0.47% to 3.6% can be achieved compared to using a fixed EFT pairfor a heat pump. In addition, comparisons were made between the CO2 emissions of optimally sized (based on economic factors) hybrid GHSPs and those of non-hybridized GSHPs. Both the optimally-sized hybrid GHSPs, and the non-hybridized GSHPs significantly reduce CO2 emissions compared to the use of conventional natural gas/electrical systems. The additional environmental benefit of the non-hybridized GSHPs over that of the optimally-sized hybrid GSHPs was found to be negligible in most cases analyzed.

scholarly journals A Techno-economic Analysis of Heat-Pump Entering Fluid Temperatures, and CO2 Emissions for Hybrid Ground Source Heat Pump Systems

2021 ◽  
Author(s):  
Hiep V. Nguyen ◽  
Ying Lam E. Law ◽  
Xiaoyan Zhou ◽  
Philip R. Walsh ◽  
Wey H. Leong ◽  
...  
Keyword(s):  
Natural Gas ◽  
Co2 Emissions ◽  
Heat Pump ◽  
Heat Pumps ◽  
Economic Effects ◽  
Fluid Temperature ◽  
Ground Source Heat Pump ◽  
Air Conditioner ◽  
Ground Source Heat Pumps ◽  
Ground Source

Hybrid ground-source heat pumps (GSHPs) that include a ground loop for the base heating and cooling needs, and an auxiliary system (natural gas boiler and electric air conditioner) for peak loads, are an economical and environmentally cleaner alternative to conventional systems. For a ground-source heat pump (GSHP) system, the choice of entering fluid temperature (EFT) to the heat pump plays a crucial role in determining system efficiency of and operating costs. To continue expanding the knowledge base of efficiently sizing GSHPs as a component of a hybrid system, this study explores the economic effects of choosing an EFT for a heat pump. In addition, system CO2 emissions are calculated and analyzed for a variety of building types. Using a computational approach to size hybrid GSHP systems recently published in [Alavy et al., Renewable Energy, 57 (2013) 404-412], the effects of optimizing EFT for a heat pump, and CO2 emissions were studied for a variety of commercial installations. In the present study, using ten buildings situated in Southern Ontario, Canada, by varying cooling and heating EFTs for a heat pump, savings ranging from 0.47% to 3.6% can be achieved compared to using a fixed EFT pairfor a heat pump. In addition, comparisons were made between the CO2 emissions of optimally sized (based on economic factors) hybrid GHSPs and those of non-hybridized GSHPs. Both the optimally-sized hybrid GHSPs, and the non-hybridized GSHPs significantly reduce CO2 emissions compared to the use of conventional natural gas/electrical systems. The additional environmental benefit of the non-hybridized GSHPs over that of the optimally-sized hybrid GSHPs was found to be negligible in most cases analyzed.

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