风经过1小时的动能:
Ek=(1/2)mV^2=(1/2) ρsLV^2
=(1/2)ρ*∏R^2*V*t *V^2
=(1/2)ρ*∏(d/2)^2*t *V^3
Q水=20%Ek = C水M △t
△t=20%Ek/C水M=20%*(1/2)ρ*∏(d/2)^2*t *V^3/C水M
=0.2*0.5*1.29*3.14*(6/2)^2*3600*8^3/4.2*10^3*100
=16.0℃
风经过1小时的动能:
Ek=(1/2)mV^2=(1/2) ρsLV^2
=(1/2)ρ*∏R^2*V*t *V^2
=(1/2)ρ*∏(d/2)^2*t *V^3
Q水=20%Ek = C水M △t
△t=20%Ek/C水M=20%*(1/2)ρ*∏(d/2)^2*t *V^3/C水M
=0.2*0.5*1.29*3.14*(6/2)^2*3600*8^3/4.2*10^3*100
=16.0℃