Hi Everybody:

I'm designing one blast Freezer with the following characteristics:

  • Direct expansion system
  • R22
  • T evap = -37ºC
  • T air = -30ºC
  • T cond = +35ºC
  • Total load = 190 Kw
  • 02 open drive screw compressors 119 Kw each one.
  • 01 oil separator
  • 01 Evaporative condenser of 800KW
Someone told me that for this temperature and load it's better to use a economizer and thermosiphon oil cooling but i'm not sure about it beacuse i always installed NH3 Systems for low temperature.

i will like to know if somebody has some information or coment about this topic.

Luis Sandoval.

Lima - Peru


Best Regards.