Hi,

I'm trying to calculate how long it will take for a 5 Liter HDPE container with a wall thickness of 0.005 m filled with 50 degree water to equalize with the outside temperature of 20 degrees.

Thermal Conductivity of HDPE. -Approx. 0.88W/mk

Total surface area exposed to water is - 0.169m²

So i used Fouriers law:

I calculated892.32 WattsMy question is what does this relate to? Im realy confused how I use this to determine the time it will take for the water temp to equalise.

Thanks for your help!

Rob