A flow rate question? 4

[PhilSham]

Hi all,
I'm trying to work out the flow rate for a pump to heat a chicken house. The farmer has already laid pipe and wants to size a pump. Its a two pipe system, feed and return with 5 water to air heat exchangers Link. He appears to have the first two in parallel, the next two in parallel and the last one on its own. Water flow-through is given as 1.76 m3/h for the exchanges, should i be aiming at a flow of twice this so that the first 4 get the required flow with the last one getting double?

 

[georgeverghese]

Yes, to minimise oxygen pickup in this recirc fluid, the expansion drum should also be N2 blanketed.

 

[Latexman]

Nitrogen blanket on the expansion tank? In a chemical plant with N2 readily available, yes. But on a chicken farm? I'm having a hard time with that one. It may not be practical.

Good luck,
Latexman

Technically, the glass is always full - 1/2 air and 1/2 water.

 

[georgeverghese]

Surely this farmer could get a N2 bottle bank and some pressure regulators from somewhere nearby?

 

[bimr]

There is no need for nitrogen in this small of a system. Some power plants don't use nitrogen even though it would be of great benefit.

The loop pressure is generally maintained at slightly above atmospheric so there is never any oxygen present in the closed loop system.

The use of nitrogen in a place like this would most likely considered to be a safety hazard.