The 23.42 m long EPAHE system discussed in this paper gives cooling in the range of 8.0–12.7 C for the flowvelocities 2–5 m/s.
Investigations on steel and PVC pipes have shown that the performance of the EPAHE system is not significantly affected by the material of the buried pipe (pipe).
Velocity of air through the pipe is found to greatly affect the performance of EPAHE system.
The COP of the EPAHE system discussed in this paper varies from 1.9 to 2.9 for increase in velocity from 2.0 to 5.0 m/s.