Why do we use copper as a heat exchanger material

Date:2018-06-09

The heat exchanger is composed of coils, fins and shells. The main function of the heat exchanger is to transfer the heat released by gas fired by the water heater through the heat exchange process and heat the cold water flowing in the heat exchanger to the temperature required by the user. The quality of the heat exchanger is direct. It is related to the quality and performance of the whole machine.

It is understood that the core role of the heat exchanger is to rapidly transfer the heat generated by gas combustion to the water. The better the thermal conductivity, the better the heat transfer. The high thermal conductivity of copper, the stability of shrinkage and expansion, and the ease of processing are the best materials for the manufacture of gas water heater heat exchangers. The industry has been using copper as a heat exchanger material for decades.

In fact, compared to the four aspects, the performance of the copper material is better than that of the stainless steel in the part of the water heater heat exchanger. The central role of the water heater heat exchanger is to quickly transfer the heat generated by the combustion of the gas to the water. The better the thermal conductivity, the better the heat transfer. At present, no heat exchanger material better than copper has been found on the field. The thermal conductivity of copper is 400 W/mK, second only to silver, and is about 25 times that of 304 stainless steel.

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