论文部分内容阅读
本文提出了在稳态和瞬态条件下,平板型水集热器的效率及其预热时间的计算。在计算中考虑了许多参数变化的影响。当气象条件不理想时,对这些影响加以适当的研究是很重要的。比较集热器在夏天和冬天的运行情况就可看出集热器倾角的重要性和管间距的影响。本文还提出了一种经验方法,将每天的辐射力曲线变换成有效稳定辐射力。在本文所考虑的条件下,6月份的有效辐射力节为400w/m~2,集热器效率为57%;12月份的有效辐射力为300w/m~2,效率为46.5%。
This paper presents the calculation of the efficiency and the preheating time of flat-plate water collector under steady-state and transient conditions. The effects of many parameter changes are taken into account in the calculation. When meteorological conditions are not ideal, it is important to properly study these effects. Comparing the operation of collectors in summer and winter shows the importance of collector inclination and the effect of tube spacing. This paper also presents an empirical method to transform the daily radiation force curve into an effective and stable radiation force. Under the conditions considered in this paper, the effective radiation power section in June was 400w / m ~ 2 and the collector efficiency was 57%. The effective radiation power in December was 300w / m ~ 2 and the efficiency was 46.5%.