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How to convert cable thermal losses [Watts] into enthalpy?

Question asked by Rasmus Brenøe Ruus in #Coffee Room on May 1, 2019
Rasmus Brenøe Ruus
Rasmus Brenøe Ruus · May 1, 2019
Rank E1 - BEGINNER

Hello fellow engineers

I have a certain thermal loss from my power cables, it's about 15Watts loss, and I somehow have to convert that into a enthalpy so I can calculate how much more my cooling unit has to work.

The cable is a 4G4 powerflex copper cable. 

the ambient temperature of the room is 40 degrees celcius.

What do I do?

Posted in: #Coffee Room
Ramani Aswath
Ramani Aswath · May 1, 2019
Rank A1 - PRO

1 kwhr = 860 kcals 

15 watts adds 13 kcals of heat in an hour. That much extra has to be removed by the cooling system.

Rasmus Brenøe Ruus
Rasmus Brenøe Ruus · May 1, 2019
Rank E1 - BEGINNER

Thanks Ramani. 


Is there an formula anywhere for this you could show me? 


Best regards

Rasmus Brenøe Ruus
Rasmus Brenøe Ruus · May 1, 2019
Rank E1 - BEGINNER

Nevermind 1 W is of course 1 J/s. 


Thanks a lot for the help!! 

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