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

被引：34

作者：

Diaconu, Bogdan M. ^{[1
,2
]}

Varga, Szabolcs ^{[3
]}

Oliveira, Armando C. ^{[3
]}

机构：

[1] Univ Constantin Brancusi Tg Jiu, Fac Engn, Tg Jiu, Romania

[2] Univ Tecn Lisboa, IST ICIST, P-1049001 Lisbon, Portugal

[3] Univ Porto, New Energy Technol Unit, Fac Engn, P-4200465 Oporto, Portugal

来源：

ENERGY | 2011年 / 36卷 / 02期

关键词：

Cold storage; Solar-assisted air conditioning; Ejector system; COOLING-SYSTEM; PHASE-CHANGE; REFRIGERATION SYSTEM; ENERGY-STORAGE;

D O I：

10.1016/j.energy.2010.11.015

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

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. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1280 / 1291

页数：12

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