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Experimental studies on a combined refrigeration/power generation system activated by low-grade heat

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  • Han, Wei
  • Chen, Qiang
  • Sun, Liuli
  • Ma, Sijun
  • Zhao, Ting
  • Zheng, Danxing
  • Jin, Hongguang

Abstract

An experimental rig of a combined refrigeration/power generation system was built and investigated. This rig uses an ammonia–water binary working fluid, is driven by low-grade heat, and can function under the absorption refrigeration model and absorption power generation model. When the system was operated under the refrigeration model, the temperatures of the ethylene glycol solution that entered and exited the evaporator were −5.28 °C and −9.07 °C, respectively. The cooling output was 11.67 kW, and the corresponding coefficient of performance was 0.465. When the system was operated under the power generation model, the temperature and pressure of the turbine inlet were 94.66 °C and 8.55 bar, respectively. The turbine outlet pressure was 1.79 bar, the net power output was 1.02 kW (after 1 kW of power consumed by the solution pump was reduced), and the corresponding heat-to-power conversion efficiency was 3.98%. The combined system can achieve cooling and power generation and switch smoothly and easily between refrigeration and power mode. This study provides a feasible and flexible way to produce different products using low-grade heat.

Suggested Citation

  • Han, Wei & Chen, Qiang & Sun, Liuli & Ma, Sijun & Zhao, Ting & Zheng, Danxing & Jin, Hongguang, 2014. "Experimental studies on a combined refrigeration/power generation system activated by low-grade heat," Energy, Elsevier, vol. 74(C), pages 59-66.
    • Handle: RePEc:eee:energy:v:74:y:2014:i:c:p:59-66
    DOI: 10.1016/j.energy.2014.02.097
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    References listed on IDEAS

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    3. Yue, Chen & Han, Dong & Pu, Wenhao & He, Weifeng, 2016. "Parametric analysis of a vehicle power and cooling/heating cogeneration system," Energy, Elsevier, vol. 115(P1), pages 800-810.

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