Preliminary experimental results with a solar driven ejector air conditioner in Portugal

• Type: Article in International Scientific Journal
• Date: 2017-08-01

Authors

Szabolcs Varga (Author) FEUP; Armando C. Oliveira (Author) FEUP; Ana Isabel Marrero (Author) FEUP; Jakub Vrba (Author) Other

Journal

Title: Renewable Energy

Vol. 109

Pages: 83-92

ISSN: 0960-1481

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 33 Citations

ISI Web of Science

Scopus - 39 Citations

Scientific classification

CORDIS: Technological sciences > Engineering

FOS: Engineering and technology

Other information

Authenticus ID: P-00M-HKE

DOI: 10.1016/j.renene.2017.03.016

Abstract (EN): The first experimental results with a small scale solar driven ejector cooling system installed in Porto, Portugal are reported. The system is constituted by three sub-systems: solar collector field, cooling cycle and thermal energy distribution sub-systems. The novelty in the cooling cycle is a 1.5 kW nominal capacity variable geometry ejector using R600a as working fluid. The integrated system is designed such that it can be used for cooling (summer) and heating (winter) of a 16 m(2) test room. Experimental performance data, including e.g. collector efficiency, COP, cooling power, were collected between April and July 2016. The results indicated that the cooling capacity ranged from 1 to 2 kW depending on the operating conditions. Thermal COP of the ejector cycle was found to vary between 0.15 and 0.40. Average electrical COP was 4.6. The results indicated excellent working stability on clear days and on partially cloudy days with short interruptions of the solar radiation (<20 min). The benefits of using a variable geometry ejector and optimal operation are also demonstrated.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10