# Heating Up Applications - Energy Required and Heat Transfer Rates

## Energy required when heating up substances

The energy required when heating up a substance - like a tank, swimming pool or similar - within a certain time can be calculated as

q = m cp dT / t                     (1)

where

q = mean heat transfer rate (kW)

m = mass of substance (kg)

cp = specific heat of the substance (kJ/kg oC)

dT = temperature difference (oC)

t = heat up time (s)

Note that heat loss to the surroundings will extend the heat up time.

### Example - Heating up an Aluminum Saucepan filled with Cold Water

An aluminum saucepan with weight 2 kg is filled with 10 liter cold water at 0 oC and heated to 100oC (boiling) in one hour. The heat transfer rate can be calculated as

q = [( (10 liter) (1 kg/liter) (4.2 kJ/kgoC) + (2 kg) (0.91 kJ/kgoC) ) ( (100 oC) - (0 oC) )] / [(1 h) 3600 (s/h)]

=  1.2 kW

## Tag Search

• en: heat up process energy transfer
• es: calentar proceso de transferencia de energía
• de: erwärmen Prozess Energieübertragung

## Search the Engineering ToolBox

- "the most efficient way to navigate!"

## Engineering ToolBox - SketchUp Extension - Online 3D modeling!

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your SketchUp model with the Engineering ToolBox - SketchUp Extension/Plugin - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

Translate the Engineering ToolBox!