As a supplementary to the page “How to calculate the kW required to heat a volume of water in a particular time”
which requires you to know your volume of liquid to be heated, I thought it’d be useful to share how to do that.
In a rectangular vessel it’s just a matter of multiplying length x depth x height.
And this is where Metric comes into its own over Imperial, as lengths mm/cm/m equate to volumes ml/litres/Hectoliters.
So, I figure a 10cm cube is a liter. And there are 1000 of those 10cm³ in a 1m³.
So, if we take our measurements in cm, multiply the three together, then divide by 1000, it should work.
100 x 100 x100 = 1.000,000 = 1000 litres.
Now for a cylinder. We need the area of the circle (π × radius²) multiplied by the height.
Pi is 3.142 & is mathematical magic. Radius is the centre of the clock to the circle outer.
Let’s keep it simple and use a radius of 1m, (so a 2m diameter cylinder), and keep height as 1m, and hope for a larger volume than 1000 litres.
Again, if we take our measurements in cm then divide by 1000, it should work.
3.142 x 100² x 100 = 3142 litres.
Any suggestions contact Jamie on 07897 246 779 or email firstname.lastname@example.org.
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