Numerical simulation of a solar-assisted ejector air conditioning system with cold storage

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

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

Revista

Título: Energy

Vol. 36

Páginas: 1280-1291

ISSN: 0360-5442

Editora: Elsevier

Indexação

ISI Web of Knowledge - 21 Citações

ISI Web of Science

Scopus - 27 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Outras ciências da engenharia e tecnologias

Outras Informações

ID Authenticus: P-002-VJQ

DOI: 10.1016/j.energy.2010.11.015

Abstract (EN): Indoor space cooling represents a large potential for solar energy use due to the relative coincidence between energy availability and cooling demand. Solar-assisted air conditioning (AC) applications emerged with the development of high efficiency solar collectors. Energy storage (hot or cold) must be implemented for solar-assisted AC applications when cooling demand is present during intervals without available solar energy and also for cooling capacity optimisation ("peak shaving"). The present paper analyses a solar-assisted ejector cooling system with cold storage. Simulations were carried out over one year considering climatic data for a hot location (Bechar, Algeria) and the performance of the system was assessed for a set of design conditions. Effects of cold storage upon comfort conditions and energy demand were evaluated. Maximum room temperature and overall interval of time during which the room temperature exceeded the set-point value were the parameters used to quantify system performance. It was found that cold storage improved comfort conditions compared to a system without storage. For some design conditions it was found that increasing the cold storage capacity did not result in improved comfort conditions. The control algorithm of the system was identified as the cause of this behaviour.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 12