Recent content by si-83

Thanks guys so I've got down that if i use it in a well ventilated container it will take around 12 minutes and if i use a fan to help with forced convection it will take around 3, that's using fouriers law and a heat transfer coefficient of 21 and 100 for the air respectively and a heat...

ahhhhhh, that's quite a big typo... thanks so now I'm down to .0563244m^2 I'm getting 14245.904 watts which makes takes me up to 5.868 seconds. still seems pretty low. The surface area i found by taking the two larger sides 250cm^2 each and then the other 4 sides 15.811cm^2. 563cm^2.

Thanks I've tried this equation but end up with a figure that seems too large. heres my workings energy difference of 250ml of water between 20 and 100 degrees=
83600 J 8.7 Btu/h ft. °F - watt/meter/K [W/(m·c)]=
15.47 area of container = 563.219cm^2 depth 4.7625mm A =...

Hi guys, I'm designing a cooling device as part of a project and need a little help with the maths. OK, so the scenario is this, take boiling water, put it in a stainless steel container with Thermal Conductivity of 8.7 Btu/h ft °F and dimensions of 15.811cm x 15.811cm x 1 cm to store 250ml...