Analysis of a Solar Assisted Ejector Cooling System for Air Conditioning

• Type: Article in International Scientific Journal
• Date: 2009

Authors

Szabolcs Varga (Author) FEUP; Armando C. Oliveira (Author) FEUP; Bogdan Diaconu (Author) FEUP

Journal

Title: International Journal of Low Carbon Technologies

Vol. 4 No. 1

Pages: 2-8

ISSN: 1748-1317

Publisher: Oxford University Press

Indexing

Scopus - 33 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology

Other information

Authenticus ID: P-007-SWB

DOI: 10.1093/ijlct/ctn001

Abstract (EN): Ejector refrigeration is one of the most promising technologies because of its relative simplicity and low initial cost. In this work, a theoretical study has been carried out to assess system and refrigeration efficiencies of a solar-assisted ejector cycle using water as the operating fluid. The model was based on a 1D ejector approach, including both the refrigeration and solar collector cycles. Ejector performance was evaluated for different operating conditions. The results indicated that in order to achieve an acceptable coefficient of performance, generator temperatures should not fall below 90°C. Evaporator temperatures below 10°C and condenser temperatures over 35°C resulted in a significant drop in system efficiency, and therefore these conditions can be identified as minimal (reference) design values. The required solar collector area to provide 5 kW of cooling power was calculated for different operating conditions. Ejector dimensions were also calculated using the constant pressure mixing ejector theory.

Language: English

Type (Professor's evaluation): Scientific