Experimental investigation of a gas engine-driven heat pump system for cooling and heating operation

Liu, Fengguo; Tian, Zhongyun; Dong, Fujiang; Cao, Guan-Zhong; Zhang, Rui; Yan, Aibin

doi:10.1016/j.ijrefrig.2017.10.034

Cited by 23 publications

(13 citation statements)

References 20 publications

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“…Engine coolant cycle: ethylene glycol-water is used as engine coolant to cool the engine. The coolant flows through the exhaust gas heat exchanger (14) where it absorbs heat from the exhaust gas and then the engine cylinder heat exchanger (15) where it cools engine to ensure the engine's stable and efficient operation, and meanwhile it removes heat from the engine cylinder. In the heating mode, after the coolant receives the engine waste heat, it is introduced into the heat pump waste heat recovery exchanger (11) where it exchanges energy with the refrigerant from the evaporator and is cooled down for next cycle.…”

Section: Gehp System Working Principle and Experimental Setupmentioning

confidence: 99%

“…In the cooling mode, after the coolant receives the waste heat, it is used to heat water to provide hot water to the buildings. In the engine coolant cycle, the coolant's mass flow rate, the coolant temperatures at the inlet and outlet of the waste heat recovery exchanger (11), the exhaust gas heat exchanger (14) and the engine cylinder (15), are all measured. The heat recovered from the engine cylinder and exhaust gas is calculated based on the coolant mass flow rate and temperature differences.…”

Section: Gehp System Working Principle and Experimental Setupmentioning

confidence: 99%

“…The same authors further studied the economics of using GEHP systems at various climate regions of Iran for both residential and commercial buildings, and for both heating and cooling purposes [13]. Liu et al [14] experimentally investigated the influence of various factors on the performance of a GEHP system for cooling and hot water supply. The results showed that the effect of the evaporator water inlet temperature and gas engine speed on the system performance was more significant than the ambient air temperature.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study of a Gas Engine-driven Heat Pump System for Space Heating and Cooling

et al. 2019

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In this paper, the performance of a gas engine-driven heat pump (GEHP) was experimentally studied for space heating and cooling. An experimental test facility was developed for this purpose. The effect of key parameters on system performance was investigated under both cooling and heating modes. The results showed that as the engine speed increased from 1400 to 2000 rpm, the cooling and heating capacities increased by 23% and 28.5%, respectively while the GEHP system Primary Energy Ratio (PER) decreased by 13.5% and 11.7% in the cooling and heating modes, respectively. The system PER in the cooling mode was found lower than that in the heating mode. This indicated that heat recovery from the engine cylinder and exhaust gas was very important for improving the GEHP system performance. In the heating mode, the ambient temperature and condenser water flow rate had a large effect on the system heating capacity and PER, and insignificant effect on the gas energy input. In the cooling mode, the chilled water inlet temperature showed a large effect on both cooling capacity and gas energy input while the chilled water flow rate had a large effect on cooling capacity and insignificant effect on the gas energy input.

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Section: Gehp System Working Principle and Experimental Setupmentioning

confidence: 99%

Section: Gehp System Working Principle and Experimental Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental Study of a Gas Engine-driven Heat Pump System for Space Heating and Cooling

et al. 2019

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“…Yang et al [18] studied the performance of solar ground source heat pump in dual heat source coupling modes to optimize the average system COP. Furthermore, Liu et al [19] experimentally tested a gas engine driven heat pump for different operation modes. The author developed a prototype to test the heating and cooling performance for different evaporator's inlet temperatures, ambient temperatures, and gas engine speeds.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study and Modeling of Ground-Source Heat Pumps with Combi-Storage in Buildings

2018

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There is a continuous growth of heat pump installations in residential buildings in Germany. The heat pumps are not only used for space heating and domestic hot water consumption but also to offer flexibility to the grid. The high coefficient of performance and the low cost of heat storages made the heat pumps one of the optimal candidates for the power to heat applications. Thus, several questions are raised about the optimal integration and control of heat pump system with buffer storages to maximize its operation efficiency and minimize the operation costs. In this paper, an experimental investigation is performed to study the performance of a ground source heat pump (GSHP) with a combi-storage under several configurations and control factors. The experiments were performed on an innovative modular testbed that is capable of emulating a ground source to provide the heat pump with different temperature levels at different times of the day. Moreover, it can emulate the different building loads such as the space heating load and the domestic hot water consumption in real-time. The data gathered from the testbed and different experimental studies were used to develop a simulation model based on Modelica that can accurately simulate the dynamics of a GSHP in a building. The model was validated based on different metrics. Energetically, the difference between the developed model and the measured values was only 3% and 4% for the heat generation and electricity consumption, respectively.

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“…[16] studied the performance of solar ground source heat pump in dual heat source coupling modes to optimize the average system COP. Furthermore, [17] experimentally tested a gas engine driven heat pump for different operation modes. The author developed a prototype to test the heating and cooling performance for different evaporator's inlet temperatures, ambient temperatures, and gas engine speeds.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study and Modeling of Ground-Source Heat Pumps with Combi-Storage in Buildings

El-Baz¹,

Tzscheutschler²,

Wagner³

2018

Preprint

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There is a continuous growth of heat pump installations in residential buildings in Germany. The heat pumps were not only used for space heating and domestic hot water consumption but also to offer flexibility to the grid. the high coefficient of performance and the low cost of heat storages made the heat pumps an optimal candidate for the power to heat applications. Thus, several questions are raised about the optimal integration and control of the heat pump system with buffer storages to maximize its operation efficiency and minimize the operation costs. In this paper, an experimental investigation is performed to study the performance of a ground source heat pump (GSHP) with a combi-storage under several configurations and control factors. The experiments were performed on an innovative modular testbed that is capable of emulating a ground source to provide the heat pump with different temperature levels at different times of the day. Moreover, it can emulate the different building loads such as the space heating load and the domestic hot water consumption in real-time. The data gathered from the testbed and different experimental studies were used to develop a simulation model based on Modelica that can accurately simulate the dynamics of a GSHP in a building. The model was validated based on different metrics. Energetically, the difference between the developed model and the measured values was only 3.08\% and 4.18\% for the heat generation and electricity consumption, respectively.

show abstract

Experimental investigation of a gas engine-driven heat pump system for cooling and heating operation

Cited by 23 publications

References 20 publications

Experimental Study of a Gas Engine-driven Heat Pump System for Space Heating and Cooling

Experimental Study of a Gas Engine-driven Heat Pump System for Space Heating and Cooling

Experimental Study and Modeling of Ground-Source Heat Pumps with Combi-Storage in Buildings

Experimental Study and Modeling of Ground-Source Heat Pumps with Combi-Storage in Buildings

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