What is a reasonable temperature difference for the circulating water?
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May I ask what temperature difference for the circulating water is appropriate when calculating water coolers? When calculating the final cooling tower in a coking plant, is it reasonable to assume an inlet temperature of 32 degrees and an outlet temperature of 40 degrees? Is it possible to achieve such a temperature difference under normal conditions?
It depends on the wet-bulb temperature in your area; if the wet-bulb temperature is above 32 degrees, the water coming out of the cooling tower will not reach 32 degrees.
Replying to the post on floor 2. The wet bulb temperature here is around 26 to 27 degrees
The temperature difference of the circulating water is generally 5 degrees in the low-temperature tower and around 12 degrees in the high-temperature tower.
The temperature difference of the circulating water in our company is 10 degrees.
More or less; under normal operating conditions, a cooling tower should be able to achieve this, though there might be some issues in summer
In our area, the temperature of the water entering the cooling tower is usually around 33 to 34 degrees, while the temperature of the water exiting the tower is about 28 degrees; this is during the spring and autumn seasons. But in the summer, the weather in the south is quite hot, and the performance is not very good; sometimes the water temperature is too high to meet the production requirements, which necessitates some form of forced cooling, such as using air conditioning units.
The temperature difference is generally between 8 and 12 degrees; the greater the difference, the better the heat exchange efficiency, indicating that there is no scaling in the system. If the temperature drops after the system has been operating for some time, it may indicate that scaling has occurred in the heat exchanger, which is particularly important in power plants.
According to the data prepared by the design institute, for any system, the temperature difference is generally 10 degrees; however, in actual operation, deviations can occur due to reasons such as the equipment not being operated at full capacity or other factors.
8 to 10 degrees Celsius is generally chosen; I suppose this is also due to economic considerations.