Abstract
The paper deals with performance analysis of potential application of glazed photovoltaic-thermal collector for domestic hot water preparation for multifamily building in European climatic conditions. Two different solutions are studied, glazed photovoltaic-thermal collectors integrated in the building envelope and glazed photovoltaic-thermal collectors fixed on the roof of the building. Moreover, the paper presents a comparison with conventional side by side installation of solar thermal collectors and photovoltaic panels to show the benefit of photovoltaic-thermal collectors. Simulation analysis has been done in TRNSYS with use of developed and validated mathematical model of glazed photovoltaic-thermal collector.
Highlights
Glazed photovoltaic-thermal (PVT) collector represents a technology combining the solar thermal collector and photovoltaic module in a single component
In contrast to unglazed PVT collectors widely available on the market today, glazed PVT collectors allow sufficient temperature levels for domestic hot water preparation similar to conventional solar thermal systems, while electricity production is reduced due to additional glazing and higher operation temperatures [1]
ethylene-vinyl acetate (EVA) encapsulation decomposes to acetic acid, which causes the corrosion of PV cell contacts, delamination and degradation of layer transparency
Summary
Glazed photovoltaic-thermal (PVT) collector represents a technology combining the solar thermal collector and photovoltaic module in a single component. The principle barrier for the glazed PVT collector application is the low resistance of common ethylene-vinyl acetate (EVA) encapsulation of PV cells to excessive thermal exposure. Maximum operation temperature of EVA laminate ranges around 85 °C [2] while the stagnation temperature for glazed solar collectors could reach 120 °C to 180 °C. At such temperature levels, EVA encapsulation decomposes to acetic acid, which causes the corrosion of PV cell contacts, delamination and degradation of layer transparency. The concept of glazed PVT collector presented in the paper focuses on the temperature resistant encapsulant for PV cells based on polysiloxane gel [5]. Façades are sensitive to shading by other buildings or trees
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