Dear LittleInch,
Thanks for your comments.
The heater has a 3-pass horizontal configuration.
The oil enters the jacket from the bottom and exits from the top.
We have pressure at the pump inlet, pump outlet, heater outlet, and consumer outlet.
As you said, unfortunately, we do not have any flow...
Dear Katmar,
Thank you for your advice. I have measured the current. It is 72 A (at 10.5 bar) and the maximum current of the motor in a running state stated as 100 A. When the pressure drops from 10.5 bar, the current goes higher to around 85 A (at 6 bar)
Dear Pierr,
Unfortunately, the vendor...
Dear LittleInch
Hello again
The total flow for current consumers is considered 70 m3/hr but we will have more consumers in the future and I have to use this system till then. but we always have one consumer running and the others will be in line according to the production schedule...
Thank you all for your advice
Unfortunately, all I have is that catalog curve and my estimation of the flow rate was based on that curve ( at 100m head, flow is 100 m3/hr). I will try to obtain the proper curve from the manufacturer or boiler vendor.
Regarding the pump sizing, we had to adapt...
Thank you Pierre
We are using the analog of this thermal oil that you have sent. As I checked, the viscosity ranges are almost the same. at 40 C, it is 20 mm2/s. We will check again at a higher temperature.
Earlier Today, we could maintain the circulation by limiting the flow rate but the...
Hello LittleInch and katmar and thank you for your replies.
Unfortunately, We don't have anything more than that curve. we have bought the oil boiler and the pump as a whole package and these are the only data that we have.
Dear katmar, the pressure gauge on the suction line was okay, we also...
Please check the updated flow diagram with size and approximate length. All the valves indicated in the flow diagram were open. The separators should have oil all the time as our expansion tank always has a minimum oil level...
Also, we have removed the air in the circulation system as much as we can through valves on the top points of the pipelines and I guess that air is not causing this.
Hello
I have attached the flow diagram of the circulation system and pump curve. The model is 80-250.
Unfortunately, we do not have any flow meter in the system. We have a level switch on the expansion tank to ensure that we always have a sufficient level of oil in the tank, and we have tested...
We have not run the burner yet and the circulation is at ambient temperature (around 10 to 20 C ) and the viscosity of the oil is around 50-25 mm2/s at these temperature.
Hello Pierre and thank you
we are in the commissioning phase and we have not heated the oil yet. we have cleaned the pump strainer several times and now the system seems to be dirt-free but still, we have the pressure drop. we have considered an N2 blanket on the expansion tank and I even put...
Hello everyone,
I'm facing an issue with a hot oil circulation system used to heat the jackets of some mixers. The system operates as a closed circulation loop with a centrifugal pump. Initially, the pressure at the boiler's inlet is 10.5 bar, which aligns with both the system curve from...
