The Simluation Of Influence Of The Supply-Return Water Temperature On Radiant Floor Heating

Radiant floor heating is widely used in recent years, because it has the advantages of energy conservation and using renewable energy., supply and return water temperatures as the important parameters to design and operate radiant floor heating, selecting the value of supply and return water temperatures determine not only the consumption of heating, but also heating effect and running costs of the system. However, how do the supply and return water temperatures affect radiant floor heating, the domestic and foreign literatures have rarely been reportedFirst, the paper selects the common floor structure, diameter and tube pitch as the simulation conditions. Based on reasonable assumptions, the two-dimensional steady state mathematical model to calculate radiant floor heating was established.Secondly, according to the establishment mathematical model, while the backwater temperature difference or the supply water temperature is a certain value, studied separately that how do the supply water temperature and the backwater temperature difference affect the floor surface temperature distribution, the heat flow density distribution, the floor surface average temperature, the floor surface average heat flow density, the floor surface temperature uniformity and the proportion of the yield of radiation accounts for the total heat dissipating capacity. Through the analyses of the effects of supply and return water temperature on radiant floor heating, the results showed that supply water temperature was the main factor of the effect on floor radiation heating, the role of the backwater temperature difference is relatively weak. To obtain more uniform distribution of temperature and heat flux could raises supply water temperature or reduces temperature difference between supply and return water; in order to increase the proportion of radiation could reduce supply water temperature or raise temperature difference between supply and return water properly.In this paper, Influence of The supply-return water temperature on radiant floor heating were studied, obtained the law of variation of radiant floor heating with supply water temperature and temperature difference between supply and return water. The studies enhance people's understanding of the radiant floor heating at a deeper level, and provide an important basis for both the design and optimization of radiant floor heating system, for better promotion of radiant floor heating provides the theoretical support.