750 Valve
03-03-2006, 09:56 AM
Hi guys, haven't been to RE in a while, nice to see some of the same threads STILL going :D
Thought I might show some fotos of an R744 (Co2) rack running in a supermarket. Store load is split over 2 cascade systems (R744/R507). Each R744 rack has 2 comps for the LT load, liquid recirc is used for MT&HT loads. 2 x H/Xchs as cond for R744/R507 evap and a normal 4 comp rack as hi stage. Hi stage is water cooled, closed loop with Guntner hybrid coolers used.
LP on R744 runs around 1400 kpa (-28ish SST), vessel kept at 2400 kpa (-11ish SCT), R507 rack runs around -15 SST to keep vessel -10 to -11 SCT. Copper pipe used for all pipe runs except larger dia. rack piping, largest size is 5/8" on shopfloor.
Sorry fotos are pretty avg, only had a camera fone, will try to get better res. shots.
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Thought I might show some fotos of an R744 (Co2) rack running in a supermarket. Store load is split over 2 cascade systems (R744/R507). Each R744 rack has 2 comps for the LT load, liquid recirc is used for MT&HT loads. 2 x H/Xchs as cond for R744/R507 evap and a normal 4 comp rack as hi stage. Hi stage is water cooled, closed loop with Guntner hybrid coolers used.
LP on R744 runs around 1400 kpa (-28ish SST), vessel kept at 2400 kpa (-11ish SCT), R507 rack runs around -15 SST to keep vessel -10 to -11 SCT. Copper pipe used for all pipe runs except larger dia. rack piping, largest size is 5/8" on shopfloor.
Sorry fotos are pretty avg, only had a camera fone, will try to get better res. shots.
787
788
789
790
791