Photovoltaic Evaporative Chimney as a new alternative to enhance solar cooling

RENEWABLE ENERGY

卷:111

Article

Lucas, M.¹  Aguilar, F. J.¹  Ruiz, J.¹  Cutillas, C. G.¹  Kaiser, A. S.²  Vicente, P. G.¹ 

[1] Univ Miguel Hernandez, Dept Ingn Mecan & Energia, Avda Univ S-N, Elche 03202, Spain

[2] Univ Politecn Cartagena, Dept Ingn Term & Fluidos, Dr Fleming S-N, Cartagena 30202, Spain

关键词: Solar cooling;    Solar chimney;    Evaporative cooling;    PV/T;    Cooling tower;    HVAC;   

DOI  :  10.1016/j.renene.2017.03.087

来源: Elsevier

【 摘 要 】

Cooling sector plays a crucial role in the World's transition towards an efficient and decarbonised energy system. Solar cooling is an attractive idea because of the chronological coincidence between available solar radiation and cooling needs. This paper studies the possibility of increasing the efficiency of solar photovoltaic modules by evaporative cooling. This, combined with the use of a water condensed chiller, will enable an efficient cooling system design as a whole. To achieve this goal this paper experimentally evaluates the thermal and electrical performance of a Photovoltaic Evaporative Chimney. A prototype with two photovoltaic modules was built; one of them is used as a reference and the other is modified in its rear side including the evaporative solar chimney. The system is able to dissipate a thermal power of about 1500 W with a thermal efficiency exceeding 30% in summer conditions. The module temperature differences reach 8 K, depending on the wind conditions and ambient air psychrometric properties. Regarding the electrical efficiency, the results showed an average improvement of 4.9% to a maximum of 7.6% around midday in a typical summer day for a Mediterranean climate. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

Free