9 litres of water weighs 9 kilos, so the flow is 0.15 kg per second. So we get 0.15 x 50 x 4.2 = 31.5 kJ/sec (1 kiloJoule per sec = 1 kiloWatt) ( rapidtables.com/convert/electric/kj-to-kw) Which broadly means you need something like a 31.5 kilowatt power output on your boiler without allowing for any inefficiencies.
Let's now look at a few boiler specifications: Ideal Logic Combi 30: specified flow rate 12.4 litre/min for 35C rise, requires 12.4/60 x 35 x 4.2 = 30.4kW. The specification states "DHW output (kW) Max" = 30.3kW.
7 rows · Mar 17, 2015 · Using the calculated feedwater mass flow and blowdown rate: Blowdown Mass Flow = Feedwater
Boiler Flow Rates Explained - Local Boiler Quotes
Dec 29, 2006 · This chart relates boiler horse power to the flow rate in gallons per minute and pounds per hour. In this case, we need a demineralizer or softener rated for a maximum flow rate of 28 gpm. It will be less depending upon how much condensate is returned. The next part of this question is what water quality is needed for the application.
Water Circulation - Boiler Capacity in kW - Temperature drop in degrees Celsius 1 kW = 3,412 Btu/h = 1.341 British hp Example - Water flow through Boiler A boiler with capacity 50 kW increases the temperature of the circulated water with 20oC - the water flow through the boiler …
The heat flow rate can be calculated as h = (4.2 kJ/kg o C) (1000 kg/m 3 ) (10 liter) (1/1000 m 3 /liter) ((100 o C) - (10 o C)) / ((30 min) (60 s/min)) = 2.1 kJ/s (kW)
Boiler Piping Flow & Pipe Sizing | HVAC Hydronics
Boiler Piping Flow & Pipe Sizing - Flow Rate Calculation To achieve calculated flow rate when sizing the pump use the following formula: Take the measurement of the longest run in the loop in feet and add 50% to that measurement. Multiply that number by.04 to get the pump head.