Project introduction:Solar photovoltaic and thermal integration can not only effectively reduce the temperature of photovoltaic modules and improve the efficiency of photopotential power generation, but also generate heat energy, thus greatly improving the conversion efficiency of solar energy. However, the temperature of photothermal products is limited by the allowable temperature of photovoltaic cells, which is generally lower than 60 ° C. In addition, due to the low energy flow density of sunlight, the use area of photovoltaic cells is large, which makes the cost of solar energy utilization systems higher. Although commonly used concentrating technology reduces the use of photovoltaic cells or collector tubes and reduces costs, due to the optical characteristics of the concentrating unit itself, there is a large distance between it and the sunlight receiving unit, and the system is usually large in size. It is not conducive to the wind resistance of solar energy systems and is difficult to accept for home users with limited lighting areas.

This project is to develop a compact concentrated photovoltaic and photothermal integrated module to reduce the volume of the photovoltaic and thermal integrated module and to switch the light and photothermal units of the system according to the energy needs of different seasons. For example, in summer, you can switch to a photovoltaic unit to generate low-temperature heat of 40 - 50 ° C while generating electricity for family life; in winter, due to the decrease in temperature, you can switch to a thermal unit to perform a large amount of light-to-heat conversion, and the generated heat energy can be used for heating.

currentlyApplication situation and application prospects:This project is suitable for areas with abundant solar energy resources. Ordinary household users or industrial enterprise users who need both electricity and heat energy can achieve the purpose of saving energy and reducing energy costs through the application of this technology. In addition, the modules developed in this project have a high degree of integration and are easy to produce, transport, install and use.