A building with a large room with a heat loss 20 kW is heated with air with a maximum temperature 50 oC. The air flow should be in the range 1-3 times the room volume. If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. Algebra Calculators ; P-Value Calculator; Square …

CFM (Cubic Feet per Minute) = Air Flow Rate CID = Cubic Inch Displacement RPM = Engine Speed VE = Volumetric Efficiency Related Calculator: Air Flow Rate Calculator; Calculators and Converters ↳ Formulas ↳ Fluid Mechanics; Ask a Question . As a rule of thumb the air heating supply temperature should be in the range 40-50oC. The required air flow rate can be calculated as, L = (20 kW) / ((1.005 kJ/kgoC) (1.2 kg/m3) ((50 oC) - (20 oC))), Required air flow from an electric furnace can be expressed in Imperial units as, Lcfm = Pw 3.42 / 1.08 dt                                   (3). The diagrams below are calculated from the equations above and can be used to estimate heat required to rise temperature in air flows. Top Calculators. Only emails and answers are saved in our archive.

But - be aware that due to the low specific heat of air the use of air for heating purposes is very limited. Please read AddThis Privacy for more information. Calculate the appropriate factory ventilation required using our convenient air change calculator. L = Q / (c p ρ (t h - t r)) (1) where . Result will be displayed. These applications will - due to browser restrictions - send data between your browser and our server. You can target the Engineering ToolBox by using AdWords Managed Placements.

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Sign up for the latest news, special offers and new stock notifications. In medical applications, drug delivery (liquid flow) uses differential pressure sensors to measure flow rates of 0.5-10.0 microliters/min. Required air flow rate in an air heating system can be calculated as, L = Q / (cp ρ (th - tr))                                         (1), Q = heat loss covered by the air heating system (kW). AddThis use cookies for handling links to social media. The fresh air supply to a public library with volume 1000 m 3 can be calculated as. Age Calculator ; SD Calculator ; Logarithm ; LOVE Game ; Popular Calculators.