Dynamic simulation of an integrated solar-driven ejector based air conditioning system with PCM cold storage

Yosr Allouche, Szabolcs Varga, Chiheb Bouden and Armando C. Oliveira

Applied Energy, 2017, vol. 190, issue C, 600-611

Abstract: The development of a dynamic model using the TRaNsient System Simulation program (TRNSYS) for the performance assessment of a solar-driven air conditioning system with integrated PCM cold storage is presented. The simulations were carried out for satisfying the cooling needs of a 140m3 space during the summer season in Tunis, Tunisia. The model is composed of four main subsystems including: solar loop, ejector cycle, PCM cold storage and air conditioned space. The effect of varying the solar collector area (Asc) and the hot storage capacity (Vhs) on the solar fraction are investigated. It was found that the application of a relatively small hot storage tank (700l) led to the highest solar fraction (92%). A collector area about 80m2 is needed to assure a solar fraction of 70%. Increasing Asc beyond this value has only a small effect on the overall system efficiency. The influence of applying cold storage is also investigated. The results without cold storage indicated that the comfort temperature was exceeded in more than 26% of the time. With cold storage the periods of high indoor temperatures reduced significantly. An optimal storage volume of 1000l was identified resulting in the highest cooling COP and excellent indoor comfort (95% of the time with a room temperature below 26°C). The maximum COP and solar thermal ratio (STR) were 0.193 and 0.097, respectively.

Keywords: Solar air-conditioning; Thermal energy storage; Phase change materials; Numerical modelling; Ejector cycle (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (26)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306261917300016
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:190:y:2017:i:c:p:600-611

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

DOI: 10.1016/j.apenergy.2017.01.001

Access Statistics for this article

Applied Energy is currently edited by J. Yan

More articles in Applied Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().