[关键词]
[摘要]
针对以水为传热介质真空管太阳能集热器存在的低温冻裂、过高温炸裂和使用间断性等问题,将太阳能集热器的真空管进行改进设计,并在其中设置相变蓄能棒,采用空气为传热介质,研制了一种新型空气式太阳能集热器。实验测试表明:在平均辐照强度为727 W/m2条件下,可延长供热3 h,并随着辐照强度增加供热时间延长;无相变材料的真空管太阳能集热器平均集热效率为36%,相变蓄能棒平均等效集热效率为60%,新型蓄能型空气式太阳能集热器综合集热效率为96%;与传统以水为介质的内插式真空管太阳能集热器平均集热效率为58%相比,该新型集热器集热效率有显著提高。
[Key word]
[Abstract]
In view of the problems of lowtemperature cracking,hightemperature cracking and discontinuity in the use of water as a heat transfer medium vacuum tube solar collector,the vacuum tube of the solar collector is improved and a phase change energy storage rod is arranged therein.Air is a heat transfer medium,and a new type of air solar collector has been developed.The experimental results show that under the condition of average irradiance intensity of 727 W/m2,the heating can be extended for 3 h,and the heating time is prolonged with the increase of irradiation intensity.The average collector efficiency of vacuum tube solar collector without phase change material is 36%,the average equivalent heat collecting efficiency of the phase change energy storage rod is 60%,and the integrated heat collecting efficiency of the new energy storage type air solar collector is 96%.Compared with the conventional waterbased mediuminjection vacuum tube solar collector with the average heat collection efficiency of 58%,the new collector has a significant increase in heat collection efficiency.
[中图分类号]
TK512+.4
[基金项目]
上海市联盟计划(LM201826,LM201855)