Question: The parallel flow double pipe heat exchanger will heat the water from 20C to 80C. Heating is done with geothermal water at a temperature of

The parallel flow double pipe heat exchanger will heat the water from 20C to 80C. Heating is done with geothermal water at a temperature of 160C. If it is known that the exit temperature of geothermal water from the heat exchanger is 120C, what is the logarithmic mean temperature difference for this heat exchanger?

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