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Experimental investigation on the influence of bubble pump on the DAR performance.

Number: No 118

Author(s) : LEE G., CHOI H. W., LEE J. S., KANG B. H., KANG Y. T.

Summary

Diffusion absorption refrigeration (DAR) system is driven by thermal energy supplied to the bubble pump. The refrigerant is heated and regenerated while flowing through the bubble pump. For this reason, the operating characteristics of the DAR cycle significantly depend on the bubble pump performance. This study focuses on the influence of the bubble pump on the operation of DAR cycle on the aspects of the cross-sectional area and the heat input. The DAR cycle uses a mixture of low GWP refrigerant and organic absorbent as the working fluids: R1234ze(E) and N,N-dimethylacetamide(DMAC). Experiments are conducted with various conditions to estimate the operating performance. The results show that the evaporation temperature tends to decrease as the cross-sectional area of the bubble pump increases, though it increases when the cross-sectional area exceeds a certain optimum level. It also turns out that the increased heat input lowers the evaporation temperature in the overall cross-sectional area range of 7.917mm2 – 17.814mm2.

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  • Original title: Experimental investigation on the influence of bubble pump on the DAR performance.
  • Record ID : 30029993
  • Languages: English
  • Subject: Technology
  • Source: 13th IEA Heat Pump Conference 2021: Heat Pumps – Mission for the Green World. Conference proceedings [full papers]
  • Publication date: 2021/08/31

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