Heat transfer driving force of the dilution steam generator
Thread Content
With the heat exchange area and flow rate remaining constant, if the pressure of the dilution steam is reduced, the saturation temperature will drop; does this mean that the driving force for heat transfer decreases as well? How does the outlet temperature of the heat source change? ? ? ?
The heat transfer driving force decreases; the outlet temperature of the heat source remains unchanged or decreases slightly in the absence of level control, but the outlet temperature on the cooling side decreases significantly.
Why does the outlet temperature of the heat source decrease when the driving force is reduced? ?
1. As the steam pressure decreases, the saturation temperature also drops, and the temperature at the condensate outlet is a few degrees lower than the saturation temperature. 2. The outlet temperature on the cold side decreases, resulting in a better condensation effect of the steam; the temperature of the condensed water will be lower as well.