Experimental study of indoor thermal environment and ventilation effectiveness in a room with low temperature radiant floor heating system and ventilation systems

Experimentally studies indoor thermal environment parameter distribution and ventilation effectiveness in a room with low temperature radiant floor heating system combined with mixing ventilation system or displacement ventilation system. The results show that when radiant floor surface temperature ranges from 25 ℃ to 29 ℃, supply air temperature ranges from 15 ℃ to 19 ℃ and outdoor air change rate is 4.2 h^-1, the distribution of indoor thermal environmental parameter is relatively uniform, the indoor vertical air temperature difference is less than 1 ℃ and ventilation effectiveness is approximately 1.0 when the low temperature radiant floor heating system is integrated with mixing ventilation system. The distribution of indoor thermal environmental parameter is relatively non-uniform, the indoor vertical air temperature difference is large and up to 4 ℃ and ventilation effectiveness is approximately 1.1 when low temperature radiant floor heating system is integrated with displacement ventilation system.