Search results for query: *

Currently the centrifugal chiller is using a water cooled condenser. I am investigating the advantage of using an evap. condenser (cooling tower) to increase efficiency but was concerned about possible problems with lower head pressure. Thanks for your help!

Yes, I understand sizing is of importance. I was worried about possible surging due to lower head pressure. Is this a valid concern?

Are there any potential problems with using centrifugal compressors with evaporative condensers? (800 tons)

Thank you all very much. I have arrived at a sufficient load calculation method.

How would one determine the heating load for a warehouse where all that needs to be heated is the area near the ceiling to 45-50F. All they want to do is keep the pipes from freezeing. How should I determine the heating load for such a case? Any help would be appreciated. Thanks!

Thanks again for your help. I will explain my situation.. We have a cylinder of recovered R22 and at 60F we have a pressure of 211 psi. We were using the R22 as part of the high side of cascade refrigeration system with R23 on the low side. We figured there must be a leak in the cascade...

Okay so I tried to validate this sum of partial pressures idea with a blend of R503 [R23/R13(40.1/59.9)] at a temperature of 60F and assumed 100 grams of R503. My numbers just didn't work out. Am I missing something? After taking a look at the ideal GAS law, does it not work for a saturated...

Thank you for your input. I actually have an accidental blend of R23 and R22. Since there is no specific 400 series or 500 series with this makeup, I was wondering the total pressure of the blend at ambient temp. So, Roger, I should assumbe the pressure gauge on this bottle would read the...

How do you figure the total pressure of a cylinder with a mixture of two refrigerants? Will the total pressure be the pressure of the higher pressure refrigerant? (I am not a military engineer....i am a mechanical engineer...i don't know how that got there.)

Thanks. Is there any reference that may state this in writing? Thanks again for you help.

I am trying to estimate the total charge in my system and was wondering if anyone knew how much liquid refrigerant would be present in an evaporator coil during normal operation. I was told to assume 25% liquid and 75% vapor in the coil. Is this correct?