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Guoqiang Zhang – One of the best experts on this subject based on the ideXlab platform.

Bin Yang – One of the best experts on this subject based on the ideXlab platform.

Thomas Olofsson – One of the best experts on this subject based on the ideXlab platform.

Yosr Allouche – One of the best experts on this subject based on the ideXlab platform.

  • dynamic simulation of an integrated solar driven ejector based Air conditioning system with pcm cold storage
    Applied Energy, 2017
    Co-Authors: Yosr Allouche, Szabolcs Varga, Chiheb Bouden, Armando C. Oliveira
    Abstract:

    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 140 m 3 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 ( A sc ) and the hot storage capacity (V hs ) on the solar fraction are investigated. It was found that the application of a relatively small hot storage tank (700 l) led to the highest solar fraction (92%). A collector area about 80 m 2 is needed to assure a solar fraction of 70%. Increasing A sc 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 1000 l 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.

  • A Trnsys simulation of a solar-driven ejector Air conditioning system with an integrated PCM cold storage
    , 2017
    Co-Authors: Yosr Allouche, Szabolcs Varga, Chiheb Bouden, Armando C. Oliveira
    Abstract:

    In this paper, the development of a TRNSYS model, for the simulation of a solar driven ejector cooling system with an integrated PCM cold storage is presented. The simulations were carried out with the aim of satisfying the cooling needs of a 140 m3 Space during the summer season in Tunis, Tunisia. The system is composed of three main subsystems, which include: a solar loop, an ejector cycle and a PCM cold storage tank. The latter is connected to the AirConditioned Space. The influence of applying cold storage on the system performance was investigated. It was found that the system COP increased compared to a system without cold storage. An optimal storage volume of 1000 l was identified resulting in the highest cooling COP and highest 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.

Zhun Yu – One of the best experts on this subject based on the ideXlab platform.