Thermal performance of radiant floor cooling system

Compares the stability of indoor air temperature and floor surface temperature, condensation occurred frequency of radiant floor cooling system under different control types including on-off bang-bang control, variable flow control and outdoor reset with indoor temperature feedback control. The results show that the lowest supply water temperature of outdoor reset control is 15 ℃, and the compensation rate of outdoor temperature is 0.25; in the early operation time, the stability of indoor air temperature of on-off bang-bang control is superior to other control types, as time going on, the stability of indoor air temperature of outdoor reset with indoor temperature feedback control comes better; and in the stability of floor surface temperature, the outdoor reset with indoor temperature feedback control is better than water flow control except the early operation time, and its anti-condensation capacity and thermal comfort is superior to those with on-off bang-bang control and variable flow control.