IIR document

Performance analysis of high temperature heat pump based on the hybrid compression of water medium.

Number: 0226

Author(s) : WU D., HU B., WANG R. Z.


By coupling the H2O/LiBr absorption heat transformer and water vapor compression heat pump via thermal, a new hybrid heat pump system is proposed in waste heat recovery and utilization. The new heat pump system takes good advantage of the merits of absorption heat transformer and vapor compression heat pump. It can achieve large temperature lift, ultra-high temperature supply with moderate efficiency and power consumption. To evaluate the performance of the hybrid system, the simulation is performed under a specific condition to recover heat from the 80◦C waste heat, achieve a 100◦C temperature lift, and supply ultra-high temperature heat with 180◦C. The parametric study is conducted to assess the effects of the evaporation temperature in the absorber on the system performance. The simulation results indicate that the hybrid system has a maximum COP under different evaporation temperatures in the absorber. When the evaporation temperature in the absorber is 126◦C, the maximum COP of the hybrid system is 2.815. At this condition, the concentration of the dilute solution and concentrated solution is 64.49% and 66.60%, respectively. And the final heating capacity is 62.18 kW with an 11.25 kW power consumption of the steam compressor.

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Pages: 10 p.


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  • Original title: Performance analysis of high temperature heat pump based on the hybrid compression of water medium.
  • Record ID : 30029794
  • Languages: English
  • Subject: Technology
  • Source: 15th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2022). Proceedings. Trondheim, Norway, June 13-15th 2022.
  • Publication date: 2022/06/13
  • DOI: http://dx.doi.org/10.18462/iir.gl2022.0226
  • Document available for consultation in the library of the IIR headquarters only.


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