A piece of aluminum weighing 6 kg and initially at a temperature of 300C is suddenly immersed in a fluid at 20C The convection heat transfer coefficient is 58W m2 C Taking the aluminum as a sphere having the same weight as that given, estimate the time required to cool the aluminum to 90C, using th...

A piece of aluminum weighing 6 kg and initially at a temperature of 300C is suddenly immersed

Question:

A piece of aluminum weighing 6 kg and initially at a temperature of 300ºC is suddenly immersed in a fluid at 20ºC. The convection heat-transfer coefficient is 58W/m2 · ºC. Taking the aluminum as a sphere having the same weight as that given, estimate the time required to cool the aluminum to 90ºC, using the lumped-capacity method of analysis.