To optimize and select the low temperature heat exchanger

comparative analysis on heat transfer

ash deposition and attrition performances of H-finned tubes and spiral finned tubes was conducted

by thermodynamic calculation and numerical simulation methods.The results show that

with conventional structural parameters

the spiral finned tube with unit length has higher heat transfer efficiency

and its steel consumption(flow resistance)is only 42.87%(61.45%)of that of the H-finned tube when heat transfer rate is the same.Due to the special groove structure

the swirling generated in the H-finned tube has the opposite direction to the mainstream.It shocks to the tube lee side vertically

so the H-finned tube can achieve ash self-removing.The abrasion of the H-finned tubes is lighter overall

and the fin has no sideway scouring.Therefore

the spiral finned tube has better heat transfer property while the H-finned tube has advantages in ash deposition and attrition resistance.