Year-round operation the solar powered hybrid adsorption-compression refrigeration cycle
Authors:
- Piotr Cyklis,
- Roman Duda
Abstract
In our earlier papers a hybrid adsorption-compress ion refrigeration cycle was presented. The hybrid, two stages cycle is based on ly on the natural refrigerants: water and carbon dioxide. The main advantage of the hybrid cycle is that the carbon dioxide compression cycle is subcritical because during the year-round operation it is possible to maintain the condensing temperature below 20°C. During the hot season, this is achieved by adsorption cooling, during cold seasons the wet cooling tower is sufficient. A lready several years of experience, allowed to gather a considerable amount of measurement data. T he refrigeration system is working in our laboratory constantly since 2013. In 2015 the adsor ption system was upgraded by the manufacturer. In 2017 frequency inverter for wet to wer fan controlling was introduced. The refrigeration chamber was used for tests with diffe rent content and operation of the refrigeration chamber (loading and unloading). The assumed CO 2 evaporating temperature was -35°C. The averaged for HT (High Temperature) part of the casc ade (adsorption cycle only) COP HT =0.51 for the whole year 2018. This may be considered a very good performance. Averaged total COP for the cascade system: COP=0.9 compared to COP=0.84 for compression only refrigeration cascade, with much higher TEWI index. For comparison for two -stage compression (R407C HT +R744 LT ) cycle was used. This means that if the cooling towe r fan operation is controlled using an inverter, adjusted to the actual heat removal demand, the hyb rid cycle is not only ecological but also energetically efficient.
- Record ID
- CUT982f4f76ed134c69a1cd4fd200dd286d
- Publication categories
- ;
- Author
- Journal series
- The Journal of Mechanical and Energy Engineering, ISSN 2544-0780, [0860-0325, 1640-4572]
- Issue year
- 2019
- Vol
- 3 (43)
- No
- 4
- Pages
- 318-322
- Other elements of collation
- fot.; schem.; tab.; wykr.; Bibliografia (na s.) - 322; Bibliografia (liczba pozycji) - 24; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 3 (43), No. 4
- Keywords in English
- hybrid compression adsorption refrigeration cycle
- DOI
- DOI:10.30464/jmee.2019.3.4.317 Opening in a new tab
- URL
- https://jmee.tu.koszalin.pl/ojs/index.php/jmee/article/view/137 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 5
- Publication indicators
- = 0
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT982f4f76ed134c69a1cd4fd200dd286d/
- URN
urn:pkr-prod:CUT982f4f76ed134c69a1cd4fd200dd286d
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.