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Energy and Exergy Analysis of Combined Ejector - Absorption Heat Transformer

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Résumé

In order to upgrade industrial waste heat at low temperature to higher process temperatures, an optimized ejection absorption heat transformer is studied as an effective means for upgrading waste heat at low temperature with relatively adequate performance compared to conventional single stage heat absorbers. By the use of the ejector, the absorber pressure becomes higher than the evaporator pressure and thus the cycle works with a triple pressure level. The ejector has a double function; it enables the pressure at the evaporator to remain low, and upgrades the heat quality obtained in the absorber by mixing the refrigerant vapor with the solution. Under the same operating conditions, system's COP and ECOP are compared between an AHT with ejector and without ejector. Major conclusions are that the circulation ratio is reduced and the system's dimensions can be reduced. The latter show potential for overall cost reductions.
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Dates et versions

hal-01561367 , version 1 (12-07-2017)

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  • HAL Id : hal-01561367 , version 1

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Michel Wakim, Rodrigo Rivera-Tinoco. Energy and Exergy Analysis of Combined Ejector - Absorption Heat Transformer. 30th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems (ECOS 2017), Jul 2017, San Diego, Californie, United States. ⟨hal-01561367⟩
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