Scout wrote:

the original unit is a $90 window shaker from Walmart. I
installed the pressure access ports after I removed the condensing coil. I
had to braze the refrigerant line into my tube-in-tube, and I needed a way
to purge with nitrogen while brazing, and then attach vacuum pump, and
finally, charge the unit. So I had refrigeration gauges on the system
during testing. I converted the pressures to saturated temps using the R-22
pressure temperature relationship charts. I also installed temperature
sensing wells at various points in the system, and inserted thermocouples in
them to get feedback.

Wow, that's a lot of work. What do you reckon your time is worth?


The superheat and subcooling values are calculated.

You have to know pressure & temp at two points in the system, and the total
weight of the charge.

After that you
can calculate anything. Without that, no calculation provides any useful data.
Usually output temp, weight of charge,
and watts are the only data.



The delta T I referred to is in/out of exchangers.
The delta T for 'baywater' vs cooling water is about 10 degrees.

Sounds like you are well above the average shade tree mechanic. Can you fix
turbine driven machinery? If so, please consider moving to NC... I want to hire
somebody to do my job so I can retire!

DSK