一种太阳能光伏光热综合利用技术

为提高太阳能利用的效率和减少系统制取热水及供暖时的能耗,降低采暖及发电过程中的运维成本,利用太阳能光伏光热集热板(以下简称PVT)将太阳能转化为电能和热能,通过太阳能空气能热泵将低品位热能提高至较高品位(55℃),同时降低PVT温度,从而实现PVT发电效率的提高,太阳能的综合利用率高达60%以上。此种技术在一定程度上提高了太阳能电池板的发电效率和提高热泵制热时的能效比,减少了热泵在冬季制热的除霜工作,基于此技术建立的系统适用于热水需求较大且恒定的场所,但是系统初始投资较大,推广较为困难。

In order to improve the efficiency of solar energy utilization,reduce the energy consumption when the system produces hot water and heating,and reduce the operation and maintenance cost in the process of heating and power generation,solar energy is converted into electric energy and thermal energy by solar photovoltaic photothermal collector plate(hereinafter referred to as PVT),low-grade thermal energy is raised to higher grade(55℃)by solar air energy heat pump,and PVT temperature is reduced at the same time,so as to improve the efficiency of PVT power generation.The comprehensive utilization rate of solar energy is more than 60%.To a certain extent,this technology improves the power generation efficiency of solar panels and the energy efficiency ratio of heat pump heating,and reduces the defrosting work of heat pump heating in winter.the system based on this technology is suitable for places with large and constant demand for hot water,but the initial investment of the system is large,so it is difficult to popularize.