열전소자와 상변화물질을 적용한 건물 일체형 태양광 발전 시스템 개발

Abstract

Building-integrated photovoltaics (BIPVs) are among the most promising renewable energy systems for densely populated urban. However, BIPV system showed some critical defects in efficiency which the limited insolation and the absence of heat dissipation structure. Therefore, resolving these shortcomings requires system solutions that can increase the PV efficiency or utilize heat sources to improve system efficiency. The phase change material is one of the promising ways to improve the PV efficiency or using the heat source. However, owing to problems caused by the low thermal conductivity of PCMs, many studies have combined heat fins and nano-fluid PCMs. In addition, some studies have proposed and investigated methods of heat recovery combine TEGs, which can generate electric power depending on the temperature difference without additional equipment. However, TEGs also have the disadvantage of very low power generation efficiency If they do not achieve a high temperature difference. Therefore, in this study, to address the limitations of each application, a BIPV combined with a PCM and TEG (BIPV-TEG-PCM) is proposed. Herein, the appropriate phase change temperature of the PCM and heat pipe design in the PCM container were analyzed through computational fluid dynamics(CFD)-based simulations.