Refrigeration, air conditioning and heat pumps play a vital part in the lives of everyone in the modern world. The Institute of Refrigeration is an independent registered charity run for the public benefit with a membership of nearly 2000 individuals whose work depends on refrigeration. The Institute provides a central resource for people from all over the world to improve the application of refrigeration and allied fields for the general good of society.
Good afternoon, we've been told by one of our technical expert "There is not one size fits all, most DX evaporator expansion valves would normally look to control 4-8k of superheat, subcooling is not controlled as such but you would expect to see between 2-5k of subcooling on simple systems. ". Hope this helps!
Excellent explanation. I have always had the doubt of how exactly the temperature of the outside air affects the increase in the saturation temperature in the condenser.
Dr Cotter identified probably the core to the energy issues that can be easily addressed with the improvement to maintenance as the largest impact on achieving net zero and improving Global heating. Training is also a major problem in the UK with a very limited route for training designers and an F-Gas qualification which is currently inadequate to be considered as a sole qualification for Refrigeration Technicians.
Hi there, great demonstration. If you were to take the liquid line temperature just before the metering device would there be much difference? Would it continue to subcool?
The reason for taking the temperature of the liquid on the ambient side of the cooled space (e.g. as the pipe enters the cold room) is to calculate the subcooling that has occurred because of the outside ambient conditions. You can measure the liquid line before the expansion device, this would then include the subcooling that has happened due to the liquid line entering the cooled space, care should be taken to ensure the expansion device temperature drop (happening due to the refrigerant expansion) does not influence the temperature of the liquid, line so suggest measuring no closer than 150mm to the inlet to the expansion (metering) device. The other reason for measuring the pipe on the ambient side is that evaporators can sometimes be difficult to access (loaded room, mounted high on room ceilings etc), whereas you can normally access the liquid line service on the roof or outside of the cooled space.
@@instituteofrefrigerationUK hi! is saturated temp another way of saying boiling point? knowing that would help me a lot. Also, why did we get the Suction pressure? I don't see it being used in the equation
