Given the pipeline length and total amount of oil, what size heat oil pump should be used?
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The total length of the pipelines is 70 meters (for all of them), with an inner diameter of 50 mm. The total volume of oil is 0.25 cubic meters (including the surge tank); in actual operation, this amount is usually around 0.15 cubic meters. For other customers, the pressure during operation is generally 0.25 MPa. The hot oil pump currently installed has a flow rate of 60 m/h and a head of 38 m. Is this sufficient? This is the first time I’ve encountered a client with such a long pipeline.
You need to calculate the pipe loss based on the viscosity of the oil and the material of the elbows and valves in the pipeline
Is it enough? Which aspect do you mean is sufficient? 1. Is the pump head sufficient to achieve circulation? 2. Is there enough oil in the sump to handle such a large circulation volume? 3. Can this circulation volume meet the heating requirements?
By \"1\", I mean whether sufficient circulation is achieved. The amount of oil in the high-level tank can be determined using a level gauge, and it is also possible to tell from the equipment whether heat circulation is taking place or not
The application area for heat transfer oil is unlikely to exceed 10 meters; the required head pressure is not high, as it is mainly used to overcome pipeline resistance. Heat transfer oil has a low viscosity, while the viscosity of methyl silicone oil increases significantly over time. If the pipeline resistance increases, first the flow rate will decrease, and only then will circulation become impossible. With 50 pipes for that flow rate, the flow speed needs to reach 9 meters per second; this pump probably can’t achieve that
The poster hasn’t provided clear enough questions and conditions. The circulation volume of the heat transfer oil is determined by the heat load and the temperature difference between the inlet and outlet, while the amount of oil contained is determined by the volume of the pipelines plus the volume of the heat exchange equipment
The selection of a hot oil pump for heat transfer oil follows the same calculation principles as those used for ordinary pumps. There are two parameters: one is head, and the other is flow rate. It seems that the capacity of the entire heat transfer oil system is affecting your issue. In fact, its flow rate has nothing to do with the system capacity; it is determined solely by the circulation volume, which in turn is related to the heat requirements of the heating equipment and the structure of the channels. This cannot be explained in just a few sentences, so this topic needs to be covered in more detail.