Defrosting CO2 Systems Using Reverse Hot Gas Defrost Method with LT Booster Side Heat

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We have the pleasure to have returning CO2 expert Phillip Walker from Arneg Canada joining us again. https://arneg.ca/en

Phillip will be diving into how hot gas defrost works when using the subcritical side heat to defrost systems. 

Topics we discuss:

  • We quickly review the previous episode on flash tank stability
  • LT Booster Compressor Hot Gas Design
  • Why mass flow is critical for Subcritical Defrost
  • How you get more mass out to your evaporators
  • What the differential Arneg uses across the hot gas valve
  • Why the placement of the HGV is so important
  • Limiting the size of system lineups is critical with subcritical hot gas defrost systems
  • What type of pressure drop on a circuit can see
  • The reason they opening the EEVs during defrost
  • Why Expansion loops are so important
  • How dump solenoids on suction side work
  • Length of defrosts and drip time
  • How Hot Gas can be an efficiency gain on your system
  • Issues you can see with hot gas systems
  • Why high mass Arneg systems will have 2 flash tanks
  • The step that follow when going into defrost.

Learn more about Phillip – https://www.linkedin.com/in/phillmwalker
Learn more about Arneg – https://arneg.com


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