Experimental Assessment of Thermal Performance of an Elevated Chinese Kang System

摘要

Chinese kangs are widely used in Northern China as they are above to provide home heating and at the same time create good bed micro-climates for sleeping and family home activities.In this paper,an experimental assessment of thermal performance of an elevated kang and its effect on indoor environment is highlighted.A prototype test room was constructed with an elevated kang in it.Several parameters such as surface temperature of kang plates,smoke temperature,indoor air temperature,heat flux from kang plates and smoke velocity were monitored.From the experiments,the surface temperatures of upper plates can be increased to 13.9～43.4°C within 1.5～2.0 hours as the stove is fired,and inlet smoke temperature fluctuates a lot and mostly varies in the range of 300～600°C.The surface temperature distribution of the elevated kang is reasonably uniform.The mass flow rate of smoke during the firing periods varies at the range of 0.04～0.08 kg/s with the average value of 0.052 kg/s.The heat power into the kang body is about 19.5～46.2KW without considering the ash fire in the stove.The new results provide some ideas about the current thermal performance of the Chinese elevated kangs and some experimental data for further study.