iceman007
01-09-2006, 07:57 PM
I wondered if any of my friends in the USA could give me a little assistance with a few technical questions relating to chilled water systems. I have had to do a test of 60 questions (technical ones) Most of them I've answered, but the last few I need some help with, because I don't do many chillers. Here goes.
1 What is likely to be the result if a forward curved centrifugal fan rotation is reversed, and what would you expect to increase proportionally as the forward curved fan speed increased ?
2 What methods should be used to correctly commission a water pump within the chiller hydraulics system ?
3 What is the minimum recommended water temp setpoint without the introduction of glycol ?
4 Where would you find a check valve on a refrigeration circuit and what is it's importance ? (I could only think of defrost systems and screw compressors)
5 Why do we use a 3 way bypass valve on a condenser water system ?
The only other question I didn't answer was something about what checks needed to be done if the water flow rate was reduced, but I'll have to answer that tomorrow.
Many Thanks for your help
1 What is likely to be the result if a forward curved centrifugal fan rotation is reversed, and what would you expect to increase proportionally as the forward curved fan speed increased ?
2 What methods should be used to correctly commission a water pump within the chiller hydraulics system ?
3 What is the minimum recommended water temp setpoint without the introduction of glycol ?
4 Where would you find a check valve on a refrigeration circuit and what is it's importance ? (I could only think of defrost systems and screw compressors)
5 Why do we use a 3 way bypass valve on a condenser water system ?
The only other question I didn't answer was something about what checks needed to be done if the water flow rate was reduced, but I'll have to answer that tomorrow.
Many Thanks for your help