Heat transfer oil circulation pump
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What will happen if too many parallel circuits are added using thermal equipment for the circulation pump of a coal-fired heat transfer oil boiler? I would appreciate some guidance
Parallelizing pumps reduces their flow rate, with no other changes
Adding parallel heat-using devices, not pumps
The assigned valves must be installed; otherwise, the heat transfer oil will not be distributed evenly, and as more heating equipment is used, the relative flow rate will decrease.
Having too many parallel branches will reduce the heating rate of each device. For example, if it used to take 30 minutes for a device to reach a temperature of 150 degrees, it might now take 45 minutes after adding more devices. But if the temperature can be maintained, there’s no problem. It is possible that the temperature will not reach the required level. A situation where it can only reach 140 degrees. Because the power of both the heat transfer oil boiler and the pump is fixed.
If it’s overloaded, why are the oil outlet temperature and return oil temperature within normal ranges? There’s no issue with the boiler’s oil outlet temperature not rising, and besides, the boiler doesn’t operate continuously either – it shuts down from time to time
That means it’s not overloaded. You can’t just look at the oil outlet temperature and the oil return temperature. It depends on whether it can meet the usage requirements. After adding branch pipes, some pipes may meet the usage requirements, while others may not. The heat generated by burning coal in the boiler. The power of the pump is fixed, so overloading certainly won’t occur. In this case, adding a few branch pipes shouldn’t have much impact on the main equipment that requires heat.
Using thermal equipment to increase the temperature will reduce the heating rate, and it has little to do with the circulation pump.
The current reality is that in some cases the heat branch functions properly, while in others the temperature does not reach the required level, and this situation persists
Could it be that too many hot circuits are being used, resulting in insufficient pump flow?
The oil outlet and inlet of the boiler are connected to the heating equipment through two oil distribution cylinders; all oil inlets and outlets of the heating equipment are connected in parallel to these oil distribution cylinders, with valves present on each circuit