I see, does this mean that the heat generated by the friction is contained in the fluid since this is a near adiabatic process?
And thank you, it is making more sense now.
The part that is hanging me up is this: I don't understand why the pressure of the fluid is lower after the valve.
What principle causes the pressure to drop? Bernoulli's equation can describe why the pressure is lower INSIDE the valve (the fluid is forced through a narrower passage which...
When it leaves the TXV, it has flash gas because we dip into the saturated region on a PH diagram, however, this is an adiabatic process so this statement does not hold true: "A valve in a refrigeration unit usually flashes a high pressure liquid into a low pressure gas, thus requiring energy...
The system I had in mind is just a simple refrigeration system that you might find in your home or in a commercial space. The expansion is considered to be essentially adiabatic because the refrigerant passes through the valve quickly and has very little surface area or time to perform any heat...
As the title suggests, can the JT effect be used to explain why the pressure drops across a thermal expansion valve for a typical refrigeration system (e.g. air conditioner or heat pump)?
From what I understand, the liquid refrigerant dropping in pressure as it goes through a narrower passage...
