Experimental Study on the Influence of Buried Geothermal Pipes on the Temperature Field of Concrete Roads

Table 6

Temperature rise value of the second, third, and fourth layers under three flow conditions.

Position	Flow velocity (m/s)	Initial temperature (°C)	Temperature after 2 h (°C)	Temperature after 6 h (°C)	The temperature rise value between initial temperature and temperature after 6 h (°C)
The second layer	0.8	6.67	13.51	15.55	6.09
	0.85	7.43	14.76	17.23	6.5
	0.9	6.49	14.67	18.03	7.03
The third layer	0.8	7.84	10.58	13.93	6.09
	0.85	8.39	11.47	14.89	6.5
	0.9	7.76	12.12	14.79	7.03
The fourth layer	0.8	8.78	10.48
	0.85	9.45	10.83
	0.9	9.05	11.45