4.2.1 Heating supply ability in winter

It is clearly known that the supply temperature significantly influence the energy supply amount of the end systems. This work was done on the energy supply system in the present paper.

Fig.7 The floor temperature distribution Fig.8 The wall temperature distribution

of different medium temperature of different medium temperature

The water supply temperature are set as 20°C, 30°C, 40°C, 50°C and 60°C, with the ambient

temperature of 0°C and the indoor air temperature of 18°C. Fig.7 and Fig.8 represent the floor temperature distribution contrast curve of different medium temperature and the wall temperature distribution under different medium temperature, respectively. It can be seen from Fig. 7 and Fig.8 that the floor temperature and wall temperature increased with the increasing of the water supply temperature and temperature distribution in different water supply temperature showed a similar trend. A temperature peak value appearing on the floor surface where is approximately 0.02m form wall corner, this can be ascribed to the location of the embedded pipe; the wall temperature distribution is a monotonically decreasing function of the height of the wall, the reason is that, no any embedded pipe in the wall.

The computed results of ability of supplying heat with different water supply temperature are listed in Table 5. It can be seen from Table 5 that temperature increasing of the water supply can greatly increase heat supplying ability. There was a linear relationship between the increment of the total thermal flux and the increment of the water supply temperature.