Regarding the return temperature of heat transfer oil
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Our company plans to use heat transfer oil to raise the temperature of the reaction vessel. We would appreciate it if experts could help us understand whether it is possible to theoretically calculate the return temperature of the heat transfer oil, and how to do so
(Oil outlet temperature - Oil return temperature) * Specific heat * Flow rate = Heat output
Inlet pressure: 280-300, outlet pressure: 250-280
The simplest method is for the temperature measuring instrument to directly measure the temperature at the oil outlet of the reactor. Theoretical calculation: The return oil temperature of the heat transfer oil boiler can be determined by subtracting the heat absorbed by the reaction vessel from the heat at the outlet of the heat transfer oil (of course, there are also pipe heat losses; this factor can be ignored if the insulation is effective)
Hydraulic calculations are required for the selection of circulation pumps. If not, the flow rate is calculated based on that of the circulation pump.
First, calculate the heat required; assuming a temperature difference of 20 degrees between the hot oil on the way forward and back, determine the amount of hot oil needed. Then select the appropriate model, consider the flow rate of the oil pump and the thermal load of the boiler, and choose the suitable boiler model
The temperature difference between the incoming and outgoing heat transfer oil should be kept within 10–30°C; since it’s a new project, it’s advisable to install a flow meter.
Enhancing communication helps to solve problems. . . . .
The level of the return oil temperature depends mainly on the amount of heat required by the load at the end point; it is the size of this load that determines the return oil temperature. Once the total heat requirement is known, it can be calculated using the formula provided in paragraph 2. If there is no flow meter installed, the rated flow rate given in the information related to the oil furnace can be used as a reference. It is also necessary to take into account the heat losses in the pipes and equipment.