Expansion vessel sizing for POTABLE WATER
The sizing has the following assumptions: Domestic Hot Water tank is
connected to expansion vessel near cold water input. Water supply has
pressure regulator (operating pressure). Air precharge pressure in
expansion vessel at pumping should be 0.2 bar lower than operating pressure
to assure the proper expansion function. If this pressure is equal to
operation pressure than pressure fluctuation and water hammer effect can
Assumption 1.0 bar ambient air pressure.
Thic calculation can also be used for heating installations T < 90
°C if tank volume is replaced with system volume. For regulated heating
systems this method does not work since the expansion of the water is
separated into two or more loops with different temperature variations.
Program selects vessel from the following commercial sizes:
Just move off the field with Enter or Tab
or use Refresh to recalcualte!
Copyright © 2003; Leon Kos
Last modified: Fri May 14 09:35:37 CEST 2004