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Optimal operation of two-bed adsorption chillers by combining heat recovery and reallocation of adsorption/desorption times.

Number: AD-YR3-1058

Author(s) : BAU U., GIBELHAUS A., LANZERATH F., et al.

Summary

The used operation scheme strongly influences the performance of adsorption chillers [1]. To measure performance, two competing objectives are commonly used: efficiency and power density. To enhance efficiency, several heat recovery schemes have been suggested in literature, e.g. passive or active heat recovery [2]. To improve power density, reallocation of adsorption/desorption phase times has been suggested to capture the specific adsorption/desorption dynamics: reallocated phase times lead to higher power densities than equal phase times [3, 4]. In this work, we propose to combine heat recovery schemes with optimal phase time
allocation. Unfortunately, not all combinations of heat recovery schemes and phase time allocation are possible. Thus, in Section 2, we present the feasible combinations of heat recovery and reallocation schemes. In Section 3, validated dynamic models are optimised regarding their phase times which allows us compare all operating strategies at their best operating point. The optimisation results are presented as Pareto frontier of efficiency vs. power density to enable a comprehensive assessment and comparison (Section 4).

Details

  • Original title: Optimal operation of two-bed adsorption chillers by combining heat recovery and reallocation of adsorption/desorption times.
  • Record ID : 30023097
  • Languages: English
  • Source: International sorption heat pump conference, ISHPC 2017, Tokyo august 7-10.
  • Publication date: 2017/08/07

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