Closed loop questions!!
Hi,
Head loss can occur on closed loop systems because there is always water movement resistance through the closed loop piping. One of the biggest contributors are 90 degree angles because it forces the water to change direction in a small area. This can result in water flow resistance; hence, extra head on to a closed loop system. One 90 degree turn is approximately 1 foot of head (give or take a bit). Another contributor is forcing a lot of water to move through a small pipe. As more water is forced down a small pipe, the velocity of the water flow increases. Water flow resistance increases with velocity.
Hope that helps.
- Victor.
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