why didnt i study this in five years of thermodinamics

[raaaid]

yeah well the subject lasted 1 year but i repeated 4 times since it was very tuff

are you afraid of someone you look down on having same or more preparation than you?

tell me whats wrong in this then:


the vapur pressure differnce bewteen top and bottom with a gradient of five degrees its 100 kpa

this means the wheel can work with 10 m diametrum on a 5 º gradient

how much work is that for kg of r12?

1*10*10=100 J

whats the internal energy difference for 5 º WITH R12

http://energy.sdsu.edu/testhome/Test...C/TSatR12.html
around 2000 J/kg in the best case

around 5000 j/kg in the worst case


U variation=Q-W
2000=Q-100


Q=2100


eficiency=w/q=100/2100=4.7% eficiency
in the worst case: 100/5100=2%

maximum eficiency for carnot?


1-cold focus/hot focus=1.3%