Journal
ENERGIES
Volume 13, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/en13071630
Keywords
solar cooling; adsorption; evacuated tube collectors; experimental testing
Categories
Funding
- European Union [760210]
- Onassis Foundation [G ZO 025-1/2018-2019]
- H2020 Societal Challenges Programme [760210] Funding Source: H2020 Societal Challenges Programme
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The high environmental impact of conventional methods of cooling and heating increased the need for renewable energy deployment for covering thermal loads. Toward 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 degrees C) provided by evacuated tube collectors. A prototype was developed and tested in cooling mode operation. The results from the testing of separate components 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 with a range of 75 degrees C. The corresponding mean energy efficiency ratio (EER) obtained was 5.8.
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