View Full Version : Q about superheat in evaporators

Andrew Pribora
06-08-2004, 09:45 AM
Hi, all,

the situation: we have to choose evaporator for cold room.
Evap.temp. is -10 Grad C. Program needs superheat - I can input 4.6 K. Is it good value? Or better to use 3 K?

Thanks for your answer!


Andrew Pribora
06-08-2004, 11:20 AM
4.5 K - good. But may be 3 K is better?

06-08-2004, 11:24 AM
Will not give a diffrence that you can measure.
3K is too small for a normal TEV.
Chose 4 to 6 or 4.512223 :D

Andrew Pribora
06-08-2004, 11:39 AM
What does it mean - "TEV"?

Andrew Pribora
06-08-2004, 12:11 PM
Thanks for translation - I use German language (and Russian).

Bot instead thermostatic EV we can use electronic EV. In this case we get - I begin to understand - we can use smaller evaporator. And save money!

Andrew Pribora
06-08-2004, 12:20 PM
Yeah! Agree!

thanks for the discussions - I am electrical engineer, but I work in refrigeration field. And I try to understand what does it mean - superheat etc.

06-08-2004, 04:09 PM
Very fruitful discussion ;)


06-08-2004, 04:49 PM
Hi :)
small superheats are nice, but wrecked compressors are not. I would tend to go for a say 5K superheats, possibly higher, less posibility of hunting at low loading and less posibility of liquid carryover. If you want a fully flooded evaporator, buy one and the suction vessel to go with it, that is the most effecient plant. If you use direct expansion be prepared to accept less that book superheat for the sake of relyable plant.
Kind Regards. Andy.

Prof Sporlan
07-08-2004, 12:15 AM
Thermal Expansion Valve
Far too Alco sounding... or Emerson Climate Technologies Flow Control Division as they are now currently known. "Thermal Expansion Valve" is an Alco tradename.

Thermostatic Expansion Valve is the generic description. :)