HI there,

hope you are fine.
Please, I would like to discuss with you about following topic related to condensing temperature and charge of refrigerant.

Following is the topic.

Let's suppose to have a system with an electronic expansion valve.

I would expect that this valve would regulate the flux so that we would have always the same superheating.

The base case is having the unit charged so that I can have a subcooling of 9F.

Let's suppose that I will now keep away some refrigerant - I will therefore reduce the refrigerant charge.
I would expect
- condensation temperature to reduce
- subcooling to reduce
- superheating to stay constant.

What would I expect from evaporation temperature ?
According to my point of view, since I have an electronic valve, it should be constant.

And about capacity of the unit ?
Basically, if condensation will reduce, considering the compressor curves, I would expect the capacity to increase.
Nonetheless, if this would be true, the lower the charge - up to when we get an acceptable subcooling, the higher the capacity.

Please, can anybody help me to understand better this scenario ?

Many thanks