Improving Heat Exchange Performance of Massive Concrete Using Annular Finned Cooling Pipes

Table 4

Annular finned cooling pipe with the same surface area.

Case name	(mm)	hp (mm)	Surface area (mm^2)
AF_200_100	200	100	1.43 × 10^6
AF_100_66.4	100	66.4	1.43 × 10^6
AF_400_143.6	400	143.6	1.43 × 10^6