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The heat transfer coefficient of scale is 0.464-0.697W/(m.k), which is only about 1% of carbon steel. When the surface of the metal body is covered with dirt, it will seriously hinder the heat transfer capacity of the metal and directly lead to a sharp decline in the overall performance of the system. This is the most direct reason for the increase in system energy consumption.
The average scale of 1mm will reduce the heat exchange efficiency by about 17-30%
1mm scale on the main heat exchange surface will reduce the heat exchange efficiency by about 25-30%
1mm microbial scale will reduce the heat exchange efficiency by 13-19%
1mm mixed dirt will reduce the heat exchange efficiency by 15-20%