Heat exchanger calculation
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The temperature of the cold material entering the heat exchanger is 100 degrees, while the temperature of the hot material entering is 540 degrees. If the efficiency of the heat exchanger is 60%, what will be the temperatures of the cold and hot materials after passing through it? Could you also show me how to calculate this? Thank you! There is no change in the flow rate before and after heat exchange, and the specific heat remains the same.
What does it mean that the efficiency of the heat exchanger is 60%? I don’t understand that. Other than heat loss, the amount of heat released by one fluid is equal to the amount of heat absorbed by the other fluid – it’s the law of conservation of energy, right?
The level of heat transfer efficiency only affects the size of the heat exchange area; it has no relation to the heat transfer equilibrium between the cold and hot fluids.
Electrically heated, similar to an electric heating wire
It can be calculated as long as the heat absorbed and released on the cold and hot sides are equal; the prerequisite is that the outlet temperature of the material on one of the cold or hot sides must be determined (or assumed) in order to calculate the outlet temperature of the other side. In addition, it is also necessary to know the flow rates of the materials on the hot and cold sides, as well as the specific heat at constant pressure.
Can’t calculate it – the data is incomplete, right? !