Thermal Dissipating Composite Coated PosMAC Steel Sheets for Building Integrated Photovoltaic Module
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As an eco-friendly energy source, building-integrated photovoltaic (BIPV) modules that incorporate build- ing materials and flexible solar cells are rapidly advancing. However, semiconductor-based solar cells often experience reduced power generation efficiency due to rising summer temperatures. To address this issue, thermal-dissipating composite-coated PosMAC steels with excellent thermal radiation properties have been developed as backsheet materials for BIPV modules. These steels are manufactured by applying a highly durable coating with both excellent thermal radiation and corrosion resistance characteristics on both sides. The front side, where the solar module is attached, is treated with a black-colored solution that includes high-crosslinking polyester resin and thermal conductive pigments to ensure corrosion resistance for over 20 years. The rear side is coated with a dispersive polyester polymer resin solution containing thermal conductive pigments with significant anisotropic properties, which greatly enhances heat dissipa- tion by forming fine wrinkles on the surface to maximize surface area, achieved by adjusting the content of the hardening catalyst. This paper describes the thermal characteristics evaluation of the thermal-dissipat- ing composite coated on PosMAC steels, as well as the fabrication of two types of BIPV roof modules combined with CIGS solar cells.
Abstract
As an eco-friendly energy source, building-integrated photovoltaic (BIPV) modules that incorporate build- ing materials and flexible solar cells are rapidly advancing. However, semiconductor-based solar cells often experience reduced power generation efficiency due to rising summer temperatures. To address this issue, thermal-dissipating composite-coated PosMAC steels with excellent thermal radiation properties have been developed as backsheet materials for BIPV modules. These steels are manufactured by applying a highly durable coating with both excellent thermal radiation and corrosion resistance characteristics on both sides. The front side, where the solar module is attached, is treated with a black-colored solution that includes high-crosslinking polyester resin and thermal conductive pigments to ensure corrosion resistance for over 20 years. The rear side is coated with a dispersive polyester polymer resin solution containing thermal conductive pigments with significant anisotropic properties, which greatly enhances heat dissipa- tion by forming fine wrinkles on the surface to maximize surface area, achieved by adjusting the content of the hardening catalyst. This paper describes the thermal characteristics evaluation of the thermal-dissipat- ing composite coated on PosMAC steels, as well as the fabrication of two types of BIPV roof modules combined with CIGS solar cells.