... exchanger is used in huge manchines as evaporator Shell and tube heat exchanger for heat pump1Shell and tube heat exchangercoaxial heat exchanger ... temp. difference, 3.Best choice for heat pumpWork Condition:1)Refrigerant side (Between the tube and shell):R22,R134a,R404a,R407c,R410a ... water pipe is on the lowest position ,and easy for drainage in cold season,avoid freeze. Shell and tube heat exchanger ...