Analysis of a Solar Assisted Ejector Cooling System for Air Conditioning

• Tipo: Artigo em Revista Científica Internacional
• Data: 2009

Autores

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

Revista

Título: International Journal of Low Carbon Technologies

Vol. 4 Nº 1

Páginas: 2-8

ISSN: 1748-1317

Editora: Oxford University Press

Indexação

Scopus - 33 Citações

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica