HVAC designer makes dimensioning plumbing components simple. Below are a few examples of some situations where the tool can be used.
Selection of circulation pump
A three-storey building must have a new circulation pump for its heating system. The heating system consists of 15 radiators with a heating power of 1 kW each. The radiator is dimensioned for a temperature difference of 20 degrees between supply and return. There are 80 meter heating pipes (incl. Forward / return), which are dimensioned for a maximum of 100 pa / m. The pipe system also has radiator valves (10 kpa) and a static balancing valve (5 kPa). The total test table in the system is thus 80 m x 0.1 kPa / m + 10 kPa + 5 kPa = 23 kPa, corresponding to a desired ceiling height of 2.3 mVs. On HVAC-designated, the power is now set to 15 kW and the temperature difference to 20 Degrees. Hereby it is seen that the heating system must run with a flow of approx. 645 l / h. The graph shows that a MAGNA3 25-40 or Alpha3 25-40 from Grundfos will be optimal in the heating system. Selection of pipes and valves It is desired to find a suitable pipe diameter for steel pipes in a heating system with a test table of max. 100 Pa / m. The system’s flow is known to be 1 m3 / h, which according to the conversion table corresponds to 1000 l / h. 35 mm, or a DN40 with an inside diameter of approx. 41.9 mm. You can now click on the displayed products to read more. In the same way, compatible valves are read.
Valg af rør og ventiler
It is desired to find a suitable pipe diameter for steel pipes in a heating system with a pressure drop of max. 100 Pa / m. The flow of the system is known to be 1 m3/h, which, according to the conversion table, corresponds to 1000 l / h. Based on this flow, two diameters can now be read – DN32 with an inside diameter of approx. 35 mm, or a DN40 with an inside diameter of approx. 41.9 mm. You can now click on the displayed products to read more. Compatible valves are read in the same way.