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2009-05-08 11:35:08

Conventional R404A system (30 metre pipe rise)

Hi,

Sorry to go back to (Historical) R404A systems but i am currently designing 6 No R404a chill pack systems on a large commerical coldroom installation. We will be rising 6 No floors each floor at a maximum height of 5 metres per floor. I will be using double risers to rise up each floor. My concern is that the ground floor might only have a cooler duty of 10kW in some cases. Can anyone foresee a pressure drop,velocity or oil return issue for this? Eack pack will end up with around 80 - 100 kW by the time it reaches the sixth floor. The plants will not be running constantly, they will be running for a maximum on four days at a time, two or three days a month.

Regards

Kenny