蓄能型振荡热管太阳能集热器性能研究

摘要

本文设计了一种蓄能型振荡热管太阳能集热器,将其应用在蓄能型振荡热管太阳能热泵系统中,实现太阳能分季节全天候利用,提高能源利用率.使用Gambit软件建立蓄能型振荡热管太阳能集热器的三维模型,并利用Fluent软件对蓄能型振荡热管太阳能集热器中相变材料的蓄热过程进行了模拟研究,得到不同集热器结构参数、集热器内蓄能材料、太阳辐射强度、外界换热条件等对其温度场、液化率等的影响.根据模拟结果,振荡热管间距选17 mm,真空管后增设金属反射板,集热管内采用复合相变材料,夏季利用高温相变材料蓄热直接加热热水,冬季利用低温相变材料给热泵蒸发器供热,从而提高系统整体性能.%A solar collector with energy storage and oscillating heat pipe is designed and applied to solar heat pump system.All-weather use can be realized and energy efficiency can be increased.The software Gambit is used to build 3d model of solar collector with energy storage and oscillating heat pipe.Numerical simulation of the phase change materials in solar collector is calculated by the software FLUENT.Influences of different structural parameters,phase change materials,solar radiation intensity and boundary conditions on the temperature field and liquefied ratio are obtained.According to the simulation results,the space between Oscillating heat pipes is 17 mm.Metal reflection plate is after vacuum tube.Composite phase change material is adopted in the heat collecting plate.In summer,hot water is directly heated by high temperature phase change material,and low temperature phase change material is used to supply heat for heat pump evaporator in winter,so the whole performance of the system is improved.