Alternative to shell-and-tube heat exchangers
Thread Content
One of our company’s oil coolers has become obsolete due to age; its heat exchange tubes were made of copper. Now we have a cooler whose heat exchange tubes are made of stainless steel, and this new cooler is intended to replace the old one. The heat exchange area of the new cooler is three times that of the original one. I wonder if this is feasible
The performance of a heat exchanger is not determined solely by its heat exchange area; other factors also need to be taken into consideration. It is recommended to verify whether the existing heat exchanger can meet the requirements based on the operating conditions of the original heat exchanger.
The material of the heat exchange tubes has little impact on the heat transfer coefficient; in the situation described by the original poster, attention should be paid primarily to the effect of the fluid flow rate on heat transfer. It’s best to check it. It is difficult to determine light accurately based on area. The structural dimensions of the equipment should be matched to the flow rate to ensure an appropriate fluid velocity.
The thermal conductivity of copper is 401 W/m·K, while that of stainless steel is around 80 W/m·K; thus, there is a difference of 4 times in their thermal conductivity. The heat exchange area is now three times larger than before. The ultimate heat transfer efficiency also depends on the flow rate of the medium and the structure of the equipment. With proper optimization, this should be sufficient.