what are basic tips of an installation engineer before instaling the cold storage panels and pipe routing
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what are basic tips of an installation engineer before instaling the cold storage panels and pipe routing
I learn from you guys, thank you
hey sir can u tell me v can measure the super heat with out the gauge as u said earlier so whtz the thing which v can come to find the superheat with out gauge.
You cannot measure superheat without a gauge only temperatures.
You could do it with 2 temperature meters (TM): The 1st TM measures the temperature of the first bend where there's no SH realized yet and the other TM measures the temperature on the outlet of the evaporator.
Why are temps expressed in C and superheat in K, I assumed it was Celcius and Kelvin but thats not right is it, and quite apart from How we measure and where what ,in simple terms are the desired figures as far as I can make out it's 6C superrheat and 5 to 8 c subcooling is that right, it,s very near to what I learned
Devlin
Hi devlin,
'K used in superheat refers to the delta/ temperature difference. Check the kueba.de web site for super TXV super heat checks and settings.
Hi, devlin maguire :)
see this ....
http://www.refrigeration-engineer.co...efinition-reqd
http://www.refrigeration-engineer.co...tive-superheat
you can search RE forums too .... for Kelvin, SC&SH ... a lot of posts ..
Best regards, Josip :)
Hi Frank,
I have installed Cold Room its set point in -22 C but the compressor does not off except defrosting time means remains on and some times temperature reaches to -18 C I measured its super heat which details are below.
Suction line pressure 20 PSI convert to PT chart R-22 temperature is -5 F
Suction line temperature is 71 F so that according to calculation super heat is (71 - (-5) ) = 76 F ? (71-5) = 66 F ?
In both condition the super heat is too high so my question is that in cold room what super heat is ideal at evaporator and compressor side as in A/C
Compressor side Super heat 20~25 is ideal kindly reply I am really confused.
Hi Ismail,
I try to get the superheat between 4-8K when working in Celcius. This will let you know that the evaporator is fully flooded with refrigerant but you have enough superheat to make sure the refrigerant is in a vapor state when it enters the compressor.
For a freezer room you should be evaporating at least -25'C. This could just be short of gas but you would need to take more readings and find out what your sub cooling value is. That should also be between 4-8K.
Low subcooling + High Superheat = low gas charge
Also check for clean condenser with correct fan speed. Did you remove all the air with a vacuum pump before charging with refrigerant?