Design optimization of plate heat exchanger absorbers and desorbers for hybrid absorption compression heat pumps

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedings – Annual report year: 2019Researchpeer-review

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Design optimization of absorber and desorber in hybrid absorption compression heat pumps (HACHPs) is of paramount importance to reduce the installation costs of these systems. This paper presents a simulation framework to optimize the design of plate heat exchangers (PHEs) to be used as absorption and desorption units in HACHPs. A case study of a single-stage HACHP was chosen as an example to utilize the framework. A PHE design model was coupled with a cycle design tool, and the trade-o between heat transfer area and pressure drop in both absorber and desorber was established by estimating the impact of pressure drops on the heat pump thermodynamic performance. Corrugation geometry, plate size and count were selected as design variables for the optimization procedure, in order to obtain a diversied range of optimal solutions. It was found that the desorber pressure drop entails a higher degradation of the thermodynamic performance compared to the absorber,and the two limits of maximum allowable pressure drops of 15 kPa and 35 kPa were selected. The design optimization showed that it is preferred to choose corrugation geometry parameters, such as chevron angle, corrugation pitch and height, with the aim of enhancing the heat transfer at the expense of pressure drop. On the other hand, a diverse range of plate size and count was obtained as output of optimization.The results demonstrate how to select optimal congurations of PHE absorber and desorber for HACHPs.
Original languageEnglish
Title of host publicationProceedings of ECOS 2019: 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems
Number of pages14
Publication date2019
Publication statusPublished - 2019
Event32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2019) - Wroclaw, Poland
Duration: 23 Jun 201928 Jun 2019

Conference

Conference32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2019)
CountryPoland
CityWroclaw
Period23/06/201928/06/2019

    Research areas

  • Heat pumps, Ammonia/water, Heat transfer area, Pressure drop, Single-unit plate heat exchangers

ID: 189828353