Construction And Collecting Thermal Performance Analysis Of Conducting Louvered Solar Heat Collector

In order to reduce building energy consumption,and realize the goal of solar building integration,this study constructed a new type solar collector——louvered conduction type solar energy collector.Because of the special structure of the collector,it can solve problems of the collector’s decoration,freezing and leakage.So the solar collector can be better used in combination with the building.First of all,the heat transfer calculation is carried out by treating the heat collector plate as the fin under the assumed conditions,and the thickness of the heat collector plate in a certain size range is in line with the technical conditions of metal production and the normal thickness range of the traditional heat collector plate.It can conclude the type of the heat collector plate is feasible.Then based on the architectural aesthetic requirements,the location and size of the collector were preliminatively determined.And on this basis 1060 industrial pure aluminum was choosed as the heat absorption plate material.According to the calculation of the optimal length-width ratio and the aesthetic requirements of the placement,the two sizes of the heat collector plate 1.8×0.2m~2and 1.009×0.185m~2are selected.After that,the appropriate size of heat sink,insulation structure and cover plate are choosed respectively for the two sizes of hot plates through the corresponding heat transfer calculations.The heat sink designed in this paper is composed of multiple flow channels combined with different connection forms.Different flow channel structure forms can be obtained by changing the connection mode and number of different flow channels,forming different types of heat sink,and then achieving different heat transfer effects.Reason of six port respectively,four port and two port series as well as the six port,four port,two different forms of heat sink flow in parallel collector instantaneous efficiency test,according to the test results,large size collector four series flow conditions instantaneous efficiency is highest,collector series small size heat sink structure of the two flow under the condition of the instantaneous efficiency is highest.After selecting a suitable heat sink structure,the conductive solar collector was assembled and a complete structure collector was obtained.Under the complete structure,the influences of cover plate form,collector inclination Angle,mass flow rate of working medium inlet and size of heat absorption plate were tested.Firstly,the performance of collector is analyzed under different cover plate forms,and the results show that toughened glass has better thermal insulation effect as collector cover plate.Secondly,the thermal performance of the collector was tested at three angles of 0°,30°and 49°respectively.The results show that the collector efficiency is the highest when the Angle of the collector is 49°,the second is when the Angle of the collector is 30°,and the worst is when the Angle of the collector is0°.Then,when other conditions are constant and the mass flow rate is changed,the higher the mass flow rate is,the better the efficiency of the collector is.This result is consistent with the result that the total heat loss coefficient decreases with the increase of the mass flow rate.Finally,in order to investigate the performance effect of small-size louvered collector,the small-size louvered collector and large-size louvered collector were compared and analyzed under the same working medium mass flow at the entrance.It was found that the instantaneous efficiency of small-size louvered collector was larger,but the effective energy output of small-size collector was smaller than that of large-size collector under the same conditions.In the end,the paper analyzes the environment and economy of the conducting solar louvered collector,and evaluates the economy of the system from the aspects of Annual expenses,conventional energy replacement,static payback period,cost-efficiency ratio and actual benefits in application.The emission reduction of carbon dioxide,sulfur dioxide and dust during the operation of the system is estimated.