Dynamics modeling of a gas engine-driven heat pump in cooling mode

Shin, Younggy; Hooncheul, Yang; Tae, Choon-Seob; Jang, Cheol-Yong; Cho, Soo

doi:10.1007/bf02915830

Cited by 8 publications

(6 citation statements)

References 2 publications

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“…3.1.12. Sejong University, Republic of Korea (2006) In [124], the authors proposed a control algorithm to manage the operation in dynamic conditions of a GEHP unit. The authors modelled, by means of energy and mass balances, the main components of the GEHP unit, such as gas engine and heat pump (compressor, evaporator, condenser, expansion valve).…”

Section: University Of Maryland Usa (2004)mentioning

confidence: 99%

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Gas Engine-Driven Heat Pumps for Small-Scale Applications: State-of-the-Art and Future Perspectives

2021

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Gas engine-driven heat pumps are an interesting option to satisfy space heating and cooling demands aiming at energy saving, environmental impact and operating costs’ reduction. This work presents (i) a comprehensive review updated on gas engine-driven heat pumps research activities, (ii) the investigation of the central role of this technology in the air conditioning sector and (iii) the future perspectives regarding gas engine heat pumps’ diffusion in the context of the energy sector decarbonisation. The outcomes highlight that gas engine heat pumps could have better environmental performance compared to electric heat pumps both in heating and cooling operations. Moreover, they could play a pivotal role in the fight against climate change and energy security since they can guarantee an energy mix differentiation moving from electricity to natural gas and renewable gases’ usage. Indeed, by 2030, a lower-carbon gas grid could be supported by renewable gases. A further investigation has concerned diffusion of gas heat pumps activated from biofuels produced by local biomass in an energy community scenario based on a low-temperature energy district network. A novel biomass-based GEHP interacting with a low-temperature district heating network is proposed here. This system could save more than 30% of primary energy compared to biomass-fuelled boilers.

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Section: University Of Maryland Usa (2004)mentioning

confidence: 99%

“…Some authors focused on the use GEHP subsystems' mathematical models, with particular attention to the engine [38,86,89,106,124,135,[155][156][157][158]192], heat pump [86,89,155,156], or specific components (compressor, thermostatic valve, heat exchanger, etc. ).…”

Section: Modellingmentioning

confidence: 99%

Gas Engine-Driven Heat Pumps for Small-Scale Applications: State-of-the-Art and Future Perspectives

2021

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“…Furthermore, the steady state accuracy of the intelligent control scheme was higher than that of the fuzzy controller. Shin et al [29] established dynamic modeling of the GEHP in a cooling mode to simulate the dynamics of GEHP for the design of control algorithm. It was found that the time variation of the simulated temperatures, pressures and COP was close to the real systems, and this indicated that the model can be served as a virtual GEHP system to test many algorithm candidates.…”

Section: Control Strategy Of Gehpsmentioning

confidence: 99%

Natural gas engine driven heat pump system – a case study of an office building

Kimiaghalam¹

2021

Preprint

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An eQUEST model was developed to conduct a study of a natural gas engine driven heat pump (GEHP) for an office building in Woodstock, Ontario. The results were also compared with a roof-top unit to investigate annual potential energy saving using GEHP. The models were also calibrated with regression analysis which was obtained from measured data and validated with respect to ASHRAE Guideline 14-2002. The developed ad validated models were used to predict the performance of these system in different regions of Ontario; Toronto, Ottawa, Windsor and Thunder Bay. The results for five cities were compared in terms of annual energy, GHG and energy cost savings. It was concluded that Thunder Bay has the highest annual energy and GHG saving, while Toronto has the highest annual energy cost saving.

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“…Some researchers focus on the study of the GEHP system performance under cooling mode. Shin et al [8] conducted dynamic modelling of a GEHP system during start-up in cooling mode. Variation of evaporator and condenser temperatures, shaft power consumption, engine fuel consumption and primary energy ratio of the system were evaluated.…”

Section: Introductionmentioning

confidence: 99%

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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Dynamics modeling of a gas engine-driven heat pump in cooling mode

Cited by 8 publications

References 2 publications

Gas Engine-Driven Heat Pumps for Small-Scale Applications: State-of-the-Art and Future Perspectives

Gas Engine-Driven Heat Pumps for Small-Scale Applications: State-of-the-Art and Future Perspectives

Natural gas engine driven heat pump system – a case study of an office building

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

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