Carbon Dioxide Refrigeration

[Andy]

I am intersted and have a few potential projects in low temp cascade co2
I am also very interested in what has proven best practice in defrost of the low temp co2 coil..

bruceboldy

Hi Bruce

AndyP's company use a hot gas generator. Liquid is taken off the R744 condenser, fed to a pump which raises it's pressure to about 10 deg c saturation. The liquid is then boiled oil using waste compressor heat and the subsequent hot gas is used for defrosting the evaporators.

Hope this helps. Kind Regards Andy