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Open AccessArticle

Novel Adsorption Cycle for High-Efficiency Adsorption Heat Pumps and Chillers: Modeling and Simulation Results

Energy and Building Technology Group, Institute of Applied Thermofluidics, Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany
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Energies 2020, 13(1), 19; https://doi.org/10.3390/en13010019
Received: 1 November 2019 / Revised: 9 December 2019 / Accepted: 11 December 2019 / Published: 19 December 2019
A novel thermodynamic cycle for adsorption heat pumps and chillers is presented. It shows a significant improvement of the internal heat recovery between the adsorption and the desorption half cycle. A stratified thermal storage, which allows for a temperature-based extraction and insertion of storage fluid, is hydraulically coupled with a single adsorber. The benefit is an increased efficiency by reusing the released heat of adsorption for regeneration of the adsorber and by rendering possible low driving temperature differences. For investigating the second law of this cycle, a dynamic model is employed. The transient behavior of the system and the respective losses because of driving temperature differences at the heat exchangers and losses due to mixing within the storage and to the surroundings are depicted in this one-dimensional model. The model is suitable both for analyzing this advanced cycle as well as for comparisons with other cycles. View Full-Text
Keywords: adsorption cycle; thermodynamic cycle; heat recovery; stratified thermal storage; adsorption system; modeling; simulation adsorption cycle; thermodynamic cycle; heat recovery; stratified thermal storage; adsorption system; modeling; simulation
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MDPI and ACS Style

Schwamberger, V.; Desai, A.; Schmidt, F.P. Novel Adsorption Cycle for High-Efficiency Adsorption Heat Pumps and Chillers: Modeling and Simulation Results. Energies 2020, 13, 19.

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