Study On The Performance And Application Of Solar Heat Pipe Heat Collection Wall

The priority mean with coal in winter heating system in north China,lead to a long time fog weather during the heating season,and give a sever impact to the local residents of healthy living,learning and working.With the policies change of the country's coal reform electricity and coal reform fuel gas,the energy consumption of the country and the people's expense burden should not be underestimated.Therefore,it is a main research direction to exploit new energy sources and improve heat transfer efficiency in the heating system as much as possible.Among them,solar energy,as a renewable green energy has been widely used in thermal technology utilization.At the same time,in terms of high efficiency heat transfer,heat pipe as a new heat transfer component has high thermal conductive performance and its unique characteristics has very broad application space in the field of solar energy application.Therefore,this paper proposes a solar heat pipe heat collection wall system combining solar energy and architecture.In this paper,firstly,the solar heat pipe heat collection wall device is studied by a experimental method;secondly,supplemented by simulation experiment for the verification and optimization;finally,taking a house in a village of ShiJiaZhuang for example,carried on a simulation prediction with the solar heat pipe heat collection wall system.In this paper,through the operation of the experiment device and the data collection and analysis,found that:(1)in the different months of heating season,the start time of the experimental device is different.the condition of sunshine days during heating season,the start time is around 8:20 ~ 9:00;(2)The highest average temperature of radiant panel ranges in 16 ~ 30 ? ?,indoor average temperature is higher than the outdoor average temperature about 4 ~ 7 ? ?;(3)Since the maximum instantaneous efficiency of the experiment is only 54.3%,the experiment still needs improvement.In this paper,based on the original experiment simulation verification and optimization of the structure through the Fluent software,then getting the best area proportion of heat pipe on the solar collecting panels(or radiant panel)by simulation calculation,found that when heat pipe cover area is 14.8% of the solar collecting panels(or radiant panel)area,can reach the best effect,and the maximum instantaneous efficiency is 79.4%.In consideration of the possible overheating problems in summer,the experimental study about the summer heat resistance of the experimental device is carried out in this paper.By rotating heat transfer unit to prevent heat from outside to inside,the experimental data shows that the average temperature difference of indoor and outdoor is higher 0.3 ? than not to rotate heat transfer unit of solar heat pipe heat collection wall device of indoor and outdoor average temperature difference,and the highest temperature difference differ 0.5 ?.Therefore,although there is a little heat from outdoor to indoor,this method can prevent a large amount of heat into the indoor.