Experimental Research And Heat Transfer Model Of Gas-Heater Radiant Floor And GSHP Radiant Floor

As new terminal equipment in air-conditioning, the mechanism of radiant floor is heating or cooling the room mainly through radiation and convection. Compared with traditional air-conditioning, its advantages lie in thermal comfort energy efficiency free use of spacing and etc.This paper introduces the procedure and the result of the experiment of gas-heater radiant floor system and GSHP radiant floor system and compares them with traditional air-conditioner. Based on the analysis of the heat transfer of radiant floor, this paper uses the theory of heat transfer to establish a mathematical model and computes it with difference equation. The important factors inferred from the model such as floor surface temperature heat intensity composite heat transfer coefficient deviate from the experiment result in a small range of 20% and fit the need of the practical use. Moreover, the experiment result shows that the temperature of the supply water is an important factor influencing the hearing or cooling capacity of the radiant floor. Through the survey of the GSHP-radiant floor system in summer and winter, this paper lays emphasis on the performance test of this united system and the analysis of the condense of the cooling floor surface. At last, there is a practical design of GSHP-radiant system in a villa in ChongQing.The compare of the gas-heater radiant floor system and the GSHP radiant floor system indicates that the heating performance coefficient of the GSHP is higher than the gas-heater to a large extent. In addition, this united system can use the closed circling water in the underground heat exchanger to remove the surplus heat load in transitional season. Furthermore, the design and construction described in this paper are helpful to practical use.