I would like to ask the experts here for their insights regarding flow rate and pressure difference.
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Question 1: (Spinning) Why is the pressure difference of the heat transfer oil so large in fluctuation, when the total inlet temperature of the heat transfer oil remains constant, the total inlet flow rate remains constant, and the temperature of the production series remains unchanged? Is it closely related to the boiler room? Question 2: (For the spinning SM fan) The outlet pressure of the heat transfer oil pump is low, and the flow rate is higher than that of other series; naturally, the temperature of this series is slightly higher compared to other series. (The outlet pressure of the heat transfer medium pump is low.) The 1+ (steam) setting for the SM fan is active, as well as the 3+ (heat transfer oil) setting, and the pressure difference isn’t high either. What is affecting the pump outlet pressure? The flow rate hasn’t changed much, and the bypass is closed. (Originally, the flow rate was 68 T, the pressure difference was 330 kPa, and the pump outlet pressure was 0.48 MPA; steam at a rate of 1 unit and heat transfer oil at a rate of 3 units were all used.) (Now, the flow rate is 76 T, the pressure difference is 315 kPa, and the pump outlet pressure is 0.41 MPA; again, steam at 1 unit and heat transfer oil at 3 units are being used, with all bypass valves closed.) What causes it? How to adjust the pressure difference and the outlet flow rate of the heat transfer oil pump. Or is it something else?
The point where the pump’s characteristic curve intersects the system’s characteristic curve is the pump’s operating point; if the pump remains unchanged, it are the system’s characteristics that determine everything, while if the system remains unchanged, it is the pump’s characteristic curve that changes
Here is the response: 1. The large fluctuations in pressure difference are caused by unstable pressure at the pump’s outlet; check the filters, valves, and other devices connected to the pump. 2. The hot oil pump has a high flow rate and low pressure; the outlet valve of the pump can be closed slowly to increase the pressure a little. That will meet your requirements. I hope this can help you.