Hi,
I have drawn a heating system with design criteria set at max pressure drop of 200 Pa/m, some sections of pipework are coming up much higher than 200 once calculated. For example, a heavy grade steel 15mm pipe @ 80°C and a flow rate 0.062kg/s is showing a pressure drop of 387, would expect it to be much lower than this. Please can you advise?thanks
Simon
Hi Simon,
The pressure shown for section of pipework is not the pipe alone - it includes all fittings attached to that section. The calculation method can be viewed at:Pipe sizing - heating and cooling methods - Hevacomp Wiki - Hevacomp - Bentley Communities
If you need to dig into where the pressure is arising on each section I would suggest inspecting the fittings data input report upon calculation, eg:
Shane Regan | Principle Building Performance Support Engineer