P
Each branch consists of a coil in line with a two-way control valve. The total system Pressue Drop is measured and can be controlled via variable speed pumps.
I have Cv values for each coil and control valve (at 100% open). I have a formula to work out the total Cv in each AHU. I also have a formula to give me flow with respect to DP and total Cv.
What I require is a formula that will give me the Cv of a control valve with repect to its position. I believe the control vales and actuators are linear in nature and therefore flow at 50% open is exactly half of that at 100% for a fixed DP. Does the same linear relationship also apply to the Cv?
I have Cv values for each coil and control valve (at 100% open). I have a formula to work out the total Cv in each AHU. I also have a formula to give me flow with respect to DP and total Cv.
What I require is a formula that will give me the Cv of a control valve with repect to its position. I believe the control vales and actuators are linear in nature and therefore flow at 50% open is exactly half of that at 100% for a fixed DP. Does the same linear relationship also apply to the Cv?