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Analysis of an improved aqua-ammonia absorption refrigeration cycle employing evaporator blowdown to provide rectifier reflux

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  • White, Stephen D.
  • O'Neill, Brian K.

Abstract

Increased concern over the continued availability of cheap oil and gas, combined with environmental concern relating to the large-scale combustion of fossil fuels has led to a renewal of interest in the absorption refrigeration cycle. The aqua-ammonia cycle is particularly suitable for applications in the process industries, where the refrigerant is required to be at temperatures below 0°C. A modification of the conventional cycle configuration is proposed and investigated. The modified cycle employs liquid blowdown from the evaporator to provide reflux for the distillation-column generator. This modification can be employed to eliminate the use of fresh refrigerant, from the condenser, as reflux in the conventional aqua-ammonia absorption refrigeration cycle. Simulations of the modified cycle, using the PROCESS(TM) computer simulation package, predict an improvement in the coefficient of performance (COP) of approximately 5% coupled with a net reduction in the total heat-transfer area required.

Suggested Citation

  • White, Stephen D. & O'Neill, Brian K., 1995. "Analysis of an improved aqua-ammonia absorption refrigeration cycle employing evaporator blowdown to provide rectifier reflux," Applied Energy, Elsevier, vol. 50(4), pages 323-337.
    • Handle: RePEc:eee:appene:v:50:y:1995:i:4:p:323-337
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    Cited by:

    1. Zhang, Xinxin & Kobayashi, Noriyuki & He, Maogang & Wang, Jingfu, 2016. "An organic group contribution approach to radiative efficiency estimation of organic working fluid," Applied Energy, Elsevier, vol. 162(C), pages 1205-1210.

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