Ok, this is what I have come up with:
When calculating the compressor's cooling capacity, you need the suction and discharge temperatures.
This means that you cannot necessarily use the evaporator and condenser temperatures.
If there is subcooling or superheat in the system you have to take...
Ok, this is what I have worked out so far, please correct me if I have gone down the wrong path.
1. Input Refrigerant
2. Input Required Capacity
3. Input Evaporator Temperature & Condenser Temperature
4. Input Evap. Temp. & Cond. Temp. into the polynomial equ.
5. Goto database of compressor...
I don't know of any explosion proof compressors off-hand. You might want to check out Danfoss' line of household compressors at http://www.danfoss.com/compressors/. Their USA number is (410) 931-8250.
I hope this helps.
Chris et al,
It would be nice to be back in school, but no, this is a real-life situation.
We have received a beta compressor selection utility and it does not seem to give us the correct results.
To check the results I wanted to know how to select the compressor by hand.
I extracted the...
This is my situation:
I have the 10 equation coefficients that represent compressor performance (C1,C2,...,C10) for the polynomial equation specified in the ANSI/ARI Standard 540-1999 (Positive Displacement Refrigerant Compressors and Compressor Units) for each compressor...
Try the following code:
Dim RandomRowNumbers(9)
NumberOfRows = Intersect(ActiveSheet.UsedRange, Columns("A")).Rows.Count
For i = 0 To 9
RandomRowNumbers(i) = Int(NumberOfRows * Rnd + 1)
Range("b" & i + 1).Value = RandomRowNumbers(i)
Next i
It finds all the used rows in...
