Calculation for heating and cooling of enamel-lined reactors
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Dear experts: Given the specifications of the enamel kettle (heat exchange area, K value), the data on the solution that needs to be cooled inside the kettle, as well as the data on the cooling water, it is necessary to determine the time required for the solution to heat up or cool down and the flow rate of the cooling water (mainly the methods and relevant information)
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“Given the specifications of the enamel tank (heat exchange area, K value), this starting point is problematic; nothing else can be determined from it—because you shouldn’t know the K value, as it is calculated based on the geometric structure of the tank and the properties of the solution.
We select an enamel kettle of a certain specification from the manufacturer based on our volume requirements; the manufacturer provides the following data: heat exchange area of 29.48 m2, and K=170 W/(m2·℃). We use a jacket for heating and cooling operations, and it is necessary to determine the time required for these processes as well as the flow rate. Heating: heat source is 120-degree steam; Cooling: cooling water at 30 to 35 degrees
This post was last edited by wiseboy on 2016-2-16 at 17:34; not even knowing things like heat flow, the manufacturer miraculously provided a value of K=170W/(m2.℃). The following all have a serious impact on K: What is the diameter of the reactor, and is there stirring inside the reactor? What is the steam temperature? Keep in mind that the values provided by the manufacturer are K under experimental conditions, not the K value when you use it.
First, calculate the jacket water flow rate for the enamel kettle, then the area, and finally the temperature rise. . . . . . . Then there’s nothing else :lol:lol:lol