Hello everybody,
I'm confused about how to deduce the real applied heat at an inline resistance heater. The heater I have has 4 heating elements that is in direct contact with the refrigerant. It has rated power of 40kW (each heating element rod has 10kW). I can apply a partial power. However...
Dear forum users,
We have a sliding vane pump installed as inline in a closed-loop power cycle working with a refrigerant. The pump serves for overcoming the pressure drop (1-2 bar). The problem is, the pump cannot deliver any flow. When we are buying from the company, we gave the refrigerant...
Dear forum users,
I have a theoretical question. We have a cycle where the condensation pressure (temperature) is too high and for reducing it I'll buy an electric expansion valve. It needs to cause a certain pressure drop. In the datasheets the pressure drop and flow rate are correlated, but...
Dear forum users,
I'm working on a closed refrigerant loop built for university experimental research. It has some unconventional and flawed features. There is a liquid receiver at the pump's (sliding vane pump) liquid suction line (thus, between the condenser and the pump). The receiver is to...
Dear forum users,
We have built a system however the sliding vane pump seems to be unable to maintain the flow. It starts making strange sounds (maybe it is cavitation). At very low rotation speeds (10% of nominal rpm) there is some flow but when we increase the pump speed, there is even...
Dear all,
I don't know a lot about pumps and I'm having difficulties in understanding the pump curve provided by the manufacturer. I tried to contact them several times but they are not very helpful. It is a rotary positive displacement pump (sliding vane). These curves are for 1450 RPM.
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