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Function of the district heat exchanger
A district heating system consists of two separate circuits that meet in a heat exchanger made of thin plates of thermally conductive metal. The heat transfer takes place when the water from the primary side passes on one side of the plates and from the secondary side on the other side of the plates.
Measuring efficiency
To measure the efficiency of a district heating heat exchanger, one measures the Delta T between the primary and secondary return temperatures. Optimal heat transfer corresponds to a Delta T of zero degrees; as Delta T increases, efficiency decreases. It is therefore important that the metal surfaces in the heat exchangers are clean!
Efficiency calculation
Enter the values for the district heating heat exchanger to calculate the efficiency.
Cost of reduced efficiency
Enter the annual consumption and the result above to find out how much a reduction in efficiency costs.