Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Performance Results of a Solar Adsorption Cooling and Heating Unit

Tryfonas Roumpedakis
ORCID logo ,
Salvatore Vasta
* ORCID logo ,
Alessio Sapienza
,
George Kallis
,
Sotirios Karellas
,
Ursula Wittstadt
,
Mirko Tanne
,
Niels Harborth
,
Uwe Sonnenfeld
Version 1 : Received: 24 February 2020 / Approved: 25 February 2020 / Online: 25 February 2020 (11:12:51 CET)

A peer-reviewed article of this Preprint also exists.

Roumpedakis, T.C.; Vasta, S.; Sapienza, A.; Kallis, G.; Karellas, S.; Wittstadt, U.; Tanne, M.; Harborth, N.; Sonnenfeld, U. Performance Results of a Solar Adsorption Cooling and Heating Unit. Energies 2020, 13, 1630. Roumpedakis, T.C.; Vasta, S.; Sapienza, A.; Kallis, G.; Karellas, S.; Wittstadt, U.; Tanne, M.; Harborth, N.; Sonnenfeld, U. Performance Results of a Solar Adsorption Cooling and Heating Unit. Energies 2020, 13, 1630.

Abstract

The high environmental impact of conventional methods of cooling and heating has increased the need for renewable energy deployment for covering thermal loads. Towards that direction, the proposed system aims at offering an efficient solar powered alternative, coupling a zeolite-water adsorption chiller with a conventional vapor compression cycle. The system is designed to operate under intermittent heat supply of low-temperature solar thermal energy (<90 °C) provided by evacuated tube collectors. A prototype was developed and tested in cooling mode operation. The results of separate components testing showed that the adsorption chiller was operating efficiently, achieving a maximum coefficient of performance (COP) of 0.65. With respect to the combined performance of the system, evaluated on a typical week of summer in Athens, the maximum reported COP was approximately 0.575, mainly due to the lower driving temperatures at a range of 75 °C. The corresponding mean energy efficiency ratio (EER) obtained was 5.8.

Keywords

Solar Cooling; Adsorption; Evacuated tube collectors; Experimental testing

Subject

Engineering, Energy and Fuel Technology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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