Study On Energy Saving Properties Of Radiant Heating Under Different Climatic Conditions

With the rapid development of China's economy,the energy consumption is becoming ever more serious,followed by a series of environmental pollution.Haze become more and more attention of people in recent years.The national cities have been affected.Therefore,whether the energy problem can be resolved or not,directly affect the comprehensive development of our country and people's living environment.Radiant heating is widely used throughout the world and developing quickly in domestic due to its advantages of health,comfort and energy-saving.This paper combined the method of CFD simulation software and the theoretical calculation,analyzed influence of radiant panel layout position and the different number of external wall's on the indoor temperature field,the influences of thermal insulation properties of the exterior wall,different climatic region and ventilation rate were discussed founded on the results of numerical calculations.The results show that the indoor temperature distribution in the floor radiant heating was most uniform with the best comfort.Under the same comfort conditions,radiant heating was more efficient than convection heating.With the decrease of the exterior wall heat transfer coefficient,radiation heating energy saving effect was greatly improved,but energy-saving effect was not obvious compared with the convection heating through enhanced the exterior wall heat transfer coefficient.In the same climate zone,relative to the convection heating,the higher the outdoor temperature and ventilation rate of the heating room,the better energy-saving effect of radiant heating.But the more the external wall,the less efficient the energy efficiency;Different climatic zones of radiant heating energy-saving effect were different,and the efficiency of energy saving in severe cold area,scold region and hot-summer and cold-winter region was gradually increasing.This paper analyzed energy-saving at the end of the radiation heating in different climatezone,and compared energy saving with convection heating with the same comfort conditions.It can provide some reference for different climate zones radiation energy efficient design and development.And it had not only positive significance to alleviate the energy crisis and improve the environmental pollution problem,but also had the certain actual application value for the form of promotion and development of radiant heating.