Ohhhhh haha thanku! I get so lost our teacher is good but he has a really hard way of teaching that everyone in our class has trouble understanding so we have to teach ourselves lol thank you so much :)
lmfao >__< I'm doing this at work soo I'm not fully focused but yes furnaces do have 6 sides lol whoops =P
your probably right in your values, lol these stupid books are full of mistakes!
ok so let's do that again:
a = 2(3x2) + 2(2x2) + 2(3x2)
a = 32m²
300 x 32 = 9600W
so...
In my book it states in the Appendix the following:
Cast Iron = 0.42kJ/kgK
Steel = 0.46kJ/kgK
I just followed what was in there =)
ok, let me see so the environment is the furnace itself and the losses stated is 300W/m²
so I should work out the area of the furnace and times that buy...
Hi thank you for your respone! HaHa cool, I feel like I'm in school again =P
am I on the right track?:
Q = mc(T2 - T1)
Q = 2000 x 0.46(1200 - 20)
Q = 1085.6 MJ
Homework Statement
An electric furnace has dimensions 2m x 2m x 3m. When it reaches forging temperature of 1200°C, a 2t block of steel at 20°C is placed in the furnace. If there is a heat loss of 300W/m² from all surfaces, and a constant energy input of 20kW, calculate how long it will...