Solar-powered compression-enhanced ejector air conditioner

M. Sokolov*, D. Hershgal

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


This article is an extension of an earlier investigation into the possibility of adaptation of the ejector refrigeration cycle to solar air-conditioning. In a previous work [1] the ejector cycle has been proven a viable option only for a limited number of cases. These include systems with combined (heating, cooling, and hot water supply) loads where means for obtaining low condensing temperature are available. The purpose of this work is to extend the applicability of such systems by enhancing their efficiency and thereby improving their economical attractiveness. This is done by introducing the compression enhanced ejector system in which mechanical (rather than thermal) energy is used to boost the pressure of the secondary stream into the ejector. Such a boost improves the performance of the whole system. Similar to the conventional ejector, the compression-enhanced ejector system utilizes practically the same hardware for solar heating during the winter and for solar cooling during the summer. Thus, it is capable of providing a year-round space air-conditioning. Optimization of the best combination in which the solar and refrigeration systems combine through the vapor generator working temperature is also presented.

Original languageEnglish
Pages (from-to)183-194
Number of pages12
JournalSolar Energy
Issue number3
StatePublished - Sep 1993


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