CPC热管真空管式热水器实验研究

Experimental study of a novel CPC heat pipe coupled vacuum tube solar water heater

研制了一种CPC（复合抛物面聚焦）热管真空管式太阳能热水器。该热水器在普通玻璃真空管热水器的基础上耦合热管技术,并增加了CPC聚光板。对该热水器与全玻璃真空管太阳能热水器进行了热性能对比实验研究。结果表明,在300 W/m2~800 W/m2日照条件下,该新型热水器单位面积集热功率最高可达610 W/m2;平均集热效率约为80%,比全玻璃真空管太阳能热水器的瞬时效率高10%~20%;导热介质的最高温度达到103℃。证明增加CPC聚光板及运用导热油可有效提高集热品位,利用热管技术可解决严寒地区的抗冻问题,所以,CPC热管真空管式太阳能热水器将具有较广阔的市场前景。

A novel CPC heat pipe coupled vacuum tube solar water heater was developed combined with heat pipe and CPC light gathering tabula on the basis of all-glass evacuated tube solar water heater.Comparative thermal performance tests on two different types of solar water heaters were carried out.A CPC heat pipe coupled vacuum tube solar water heater and an all-glass evacuated tube solar water heater were installed in parallel and tested at the same working conditions.The results show that,the maximum heat collecting power of this solar water heater can reach 610W/m2 during solar radiation ranging from 300W/m2~800W/m2.Average heat collecting efficiency of this solar water heater can be improved effectively by using CPC,to 80%,which is 10%~20% higher than the all-glass vacuum solar water heater.The highest temperature of heat conducting oil in the vacuum tube can reach 103℃.It proved that CPC light gathering tabula and the heat conducting oil is beneficial to improve the collector grade,and heat pipes can overcome the problem of the tube broken during working at subzero temperature.Therefore,the CPC heat pipe coupled vacuum tube solar water heater will have a bright prospect of application.