Research on waste heat recovery from gas engine for auxiliary heating: An emerging operation strategy to gas engine-driven heat pump

Zhang, Rui; Tian, Zhongyun; Liu, Fengguo; Tian, Changfei; Ma, Zhenxi; Jia, Leilei

doi:10.1016/j.ijrefrig.2020.09.015

Cited by 11 publications

(3 citation statements)

References 30 publications

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“…Especially in the latter case, it is necessary due to the requirement of cooling the exhaust gases of the device and condensing the moisture therefrom [16] to reduce pollutants entering the atmosphere, in particular CO 2 . The vast majority of waste heat is used to heat domestic hot water [17], but with its wider use, e.g., as an auxiliary heater, the efficiency of the system may increase significantly, taking into account that the temperature of the domestic heating water supply is in the range of 40-60 • C. While reducing fluid temperature, for example, up to the temperature required by low-temperature heating, the efficiency of the heat pump system increases [18,19]. The second thermodynamic cycle that generates heat is the heat pump compressor, which is driven by mechanical energy from the engine.…”

Section: Heating Performancementioning

confidence: 99%

Review of Gas Engine Heat Pumps

Pawela

Jaszczur

2022

Energies

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In this paper the most promising developments of technology for gas engine-driven heat pumps for the last 15 years are presented. The purpose is to present the latest research studies and changes in this type of device, as well as to help readers to search for publications containing relevant aspects of gas engine heat pumps. Gas engine-driven heat pumps are devices for parallel heating and cooling production based on compressor heat pump technology. However, unlike heat pumps with compressors powered by electric motors, gas engine-driven heat pumps are driven by gas internal combustion engines. The reviewed solutions are an interesting alternative to traditional heating systems, characterized by the higher than 1.0 Performance Energy Ratio which expresses the degree of conversion of the energy contained in the fuel supplied to the device into energy transported to the utility needs. Presented in this review, papers show different solutions for conversion of the energy contained in the fuel into mechanical and thermal energy, and mechanical energy through the shaft system is used to drive the compressor of the heat pump. The presented study shows that, due to the complexity of the system and the wide range of applications, the technology has been subjected to detailed analyses and optimizations during the last 30 years in order to increase the efficiency of devices.

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Section: Heating Performancementioning

confidence: 99%

Review of Gas Engine Heat Pumps

Pawela

Jaszczur

2022

Energies

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“…Yebi, A. et al envisioned a real-time augmentation strategy to improve the performance of diesel machine waste heat recovery, and compared to a multi-loop PID control management strategy, the stability and safety as well as the waste heat recovery efficiency were better [13]. Zhang, et al designed a GEHP waste heat recovery model that can realize the waste heat recovery and utilization of higher efficiency gas engines and is more environmentally friendly [14]. LIU, Peng, et al considered carbon dioxide, etc., as a medium for waste heat recovery, and in practical applications, these media have higher heat transfer efficiency in waste heat recovery [15].…”

Section: Introductionmentioning

confidence: 99%

“…Zhendong Wu and Chunxiang. Applied Mathematics and Nonlinear Sciences, 9(1) (2024)[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] …”

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confidence: 99%

Proposal and evaluation of a combined refrigeration system for engine waste heat recovery based on a supercritical CO2 Brayton cycle

Wu,

Chen

2024

Applied Mathematics and Nonlinear Sciences

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In recent years, engine waste heat utilization technology has become one of the essential directions for green energy-saving development. In this study, the design of a combined refrigeration system for engine waste heat recovery under a two-stage supercritical carbon dioxide Brayton cycle is carried out, and based on the engine top-cycle energy flow and reactive flow characteristics, combined with thermodynamic and economic analysis models, the thermal and reactive efficiencies of the S-CO_2 Brayton cycle system are investigated. The multi-objective optimization model for waste heat recovery was created with hydropower efficiency and investment return as its objectives. The results showed that the minimum values of annual operating cost and initial investment cost of the combined system under the optimized conditions were 104.8 and 505.2 thousand RMB, respectively, and the total system energy loss was 7.25%. By further analyzing the top cycle parameters of the combined system, it is concluded that the combined system has better thermo-economic performance, and the results can provide some references for the combined refrigeration with engine waste heat recovery.

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A case study of a pilot system with gas-engine heat pumps and a desiccant air handling system using higher chilled water temperature in Japan

Ukai

Tanaka

2022

Applied Thermal Engineering

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Research on waste heat recovery from gas engine for auxiliary heating: An emerging operation strategy to gas engine-driven heat pump

Cited by 11 publications

References 30 publications

Review of Gas Engine Heat Pumps

Review of Gas Engine Heat Pumps

Proposal and evaluation of a combined refrigeration system for engine waste heat recovery based on a supercritical CO2 Brayton cycle

A case study of a pilot system with gas-engine heat pumps and a desiccant air handling system using higher chilled water temperature in Japan

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