The solar energy spectrum absorbed and converted by PV modules is mainly located in the high-frequency band (380–1200 nm), while the spectral energy in other bands that fail to generate electricity is converted to heat and dissipated into the environment, which leads to lower energy utilization efficiency. Spectral beam splitting cascade utilization is a potential technology to improve the efficiency of solar energy utilization. In this paper, a novel combined cooling, heating and power system with solar energy spectral beam splitting was developed according to matching the energy grade and the operating characteristics of refrigeration cycles. The theoretical investigation carried the parameters distribution of energy load and efficiency out. The solar spectrum is divided into the high-frequency spectrum for electric power generation and the low-frequency spectrum for thermal energy harvesting. The spectrum energy after removing electrical power generation is recovered for fluid heating. The part of thermal energy with high temperature is used to drive the ejector refrigeration system to obtain the cooling capacity. Hot water is derived from low temperature thermal energy. Through the effective conversion of energy and heat recovery, the novel system ensures the efficiency of solar energy utilization and realizes a high-efficiency combined supply of cooling, heating and electricity. The total energy utilization efficiency and the total converted generation efficiency of the novel system can reach 82.7 % and 44.9 %, respectively, which is a remarkable improvement from 30.7 % of the conventional single photovoltaic system. The research results provide inspiration for the efficient utilization of solar energy and facilitate the realization of more application scenarios.

光伏组件吸收和转换的太阳能光谱主要位于高频段（380~1200 nm），而其他波段的光谱能量不能发电则转化为热耗散到环境中，导致以降低能源利用效率。光谱分束级联利用是提高太阳能利用效率的潜在技术。本文根据制冷循环的能量等级和运行特性，开发了一种新型的太阳能光谱分束冷热电联供系统。理论研究进行了能源负荷和效率的参数分布。太阳光谱分为用于发电的高频光谱和用于热能收集的低频光谱。去除发电后的频谱能量被回收用于流体加热。温度高的那部分热能用来驱动喷射式制冷系统，从而获得制冷量。热水来源于低温热能。该新型系统通过能量的有效转换和热回收，保证了太阳能的利用效率，实现了冷、热、电的高效联合供应。新系统的总能源利用效率和总转换发电效率分别达到82.7%和44.9%，较30%有显着提高。常规单体光伏系统的7%。研究成果为太阳能的高效利用提供了启示，促进了更多应用场景的实现。