The medium and low head cooling pump itself cannot directly determine how much the coolant temperature is reduced. Its effect on the reduction of the coolant temperature is the result of the combined effect of multiple factors.
First, the flow rate of the cooling pump plays a key role in the temperature reduction process. The larger the flow rate, the more coolant passes through the cooling system per unit time, and the more heat can be taken away. For example, in a heat exchange device, if the flow rate of the cooling pump is large enough, the coolant can quickly transfer heat from the heat-generating device to the cooling device (such as a cooling tower), thereby reducing the temperature more effectively. Suppose a small electronic equipment cooling system, the original coolant circulation is slow, and the temperature reduction effect is not obvious. After replacing the medium and low head cooling pump with a larger flow rate, the coolant can absorb and take away heat more quickly, which may increase the coolant temperature reduction from the original 2-3℃ to 5-6℃.
Secondly, the head also has a certain indirect effect. The appropriate head can ensure that the coolant circulates smoothly throughout the cooling system, including flowing through various pipes, heat exchangers and other components. If the head is insufficient, the coolant may not reach certain parts of the system, affecting the heat dissipation effect; while too high a head may cause energy waste. For example, in a central air conditioning cooling system of a multi-story building, the medium and low head cooling pump needs to provide sufficient head to transport the coolant to the air conditioning units on each floor for heat exchange. When the head is set reasonably, the coolant can circulate effectively and help the system to reduce the coolant temperature. Generally speaking, the coolant temperature can be reduced by about 8-10℃, and the specific value depends on other parameters of the system.
In addition, the heat exchange efficiency of the cooling system served by the cooling pump is also an important factor. The cooling pump is only the power source for the circulation of the coolant, and the real heat exchange occurs in equipment such as heat exchangers. If the performance of the heat exchanger is excellent and can efficiently transfer the heat of the coolant, the temperature of the coolant can be reduced to a greater extent. For example, in some industrial cooling systems, using an efficient plate heat exchanger, combined with a medium and low head cooling pump, the temperature of the coolant may be reduced by 15-20℃ after heat exchange.
In addition, factors such as the initial temperature of the coolant, the ambient temperature, and the heat generated by the heating equipment will also affect the cooling pump's effect on reducing the coolant temperature. For example, in a high temperature environment, the cooling pump needs to overcome a larger temperature difference to reduce the coolant temperature, and the coolant temperature reduction may be reduced under the same conditions.
