Heat Flow Measurement Units

The heat flow measurement units (HMU) developed by the FKFS for the heat balancing of engines are used for measuring heat flows in liquid media.

 

In HMU integrated temperature measuring pocket
In HMU integrated temperature measuring pocket
opened temperature measuring pocket
opened temperature measuring pocket

A temperature measuring pocket is located at the HMU input (engine outlet). The medium to be measured continues to flow into a conditioning system. After conditioning, the mass flow is measured in the HMU. A temperature measuring pocket is located again at the HMU output (engine inlet).

 

Each of the temperature measuring pockets features seven thermocouples. One of them measures the absolute temperature. The remaining six thermocouples of the inlet temperature measuring pockets is connected with the six thermocouples of the outlet temperature measuring pocket in such a way that six times the temperature difference is measured.

 

The setup described applies to the intercooler coolant HMU. The engine coolant HMU also features a booster pump. In an oil HMU, the oil is not fed to a conditioning system, but simply fed through an oil-water heat exchanger whose secondary side can accept a water conditioning system.

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