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標題: 轉錄□ 熱力學作業第四章提示
時間: Mon Nov 5 03:31:55 2001
4.6
(a)
P2=P1*(V1/V2)*(T2/T1)
(b)
W1-2=P1(V2-V1)
4.13
Knowing the process equation:P=A+bv giving a linear variation of
pressure versus volume the straight line in the P-V diagram is fixed
by the two points as state1 and state2 The work as the integral of
Pdv equals the area under the process curve in the p-v diagram
4.20
Take CV as the R-134a which is the control mass <m=m1=m2>
4.27
Take C.V. as all the argon in both a and b . boundary movement work done
in cylinder B again constant external pressure of 150KPA . argon is an ideal
gas , so write out that the mass and temperature at state 1 and 2 are the same
4.32
CV R-134a this is a control mass
properties from table B5.1 and 5.2
4.39
-W=AEL/2(e)**2
where A is the cross section area
E is the modulus of elasticity of steel
L is the length of steel rod
4.40
assume a free surface on both side of the frame,ie., there are two surface
20*30 mm
4.46
force balence on the combined set of piston and spring to find the lift
pressure.
To place the process line in the p-v diagram
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┌┌┌┌ Origin: 小魚的紫色花園 <fpg.twbbs.org> 140.112.200.214 ───┐┐┐┐
4.6
(a)
P2=P1*(V1/V2)*(T2/T1)
(b)
W1-2=P1(V2-V1)
4.13
Knowing the process equation:P=A+bv giving a linear variation of
pressure versus volume the straight line in the P-V diagram is fixed
by the two points as state1 and state2 The work as the integral of
Pdv equals the area under the process curve in the p-v diagram
4.20
Take CV as the R-134a which is the control mass <m=m1=m2>
4.27
Take C.V. as all the argon in both a and b . boundary movement work done
in cylinder B again constant external pressure of 150KPA . argon is an ideal
gas , so write out that the mass and temperature at state 1 and 2 are the same
4.32
CV R-134a this is a control mass
properties from table B5.1 and 5.2
4.39
-W=AEL/2(e)**2
where A is the cross section area
E is the modulus of elasticity of steel
L is the length of steel rod
4.40
assume a free surface on both side of the frame,ie., there are two surface
20*30 mm
4.46
force balence on the combined set of piston and spring to find the lift
pressure.
To place the process line in the p-v diagram
--
┌┌┌┌ Origin: 小魚的紫色花園 <fpg.twbbs.org> 140.112.200.214 ───┐┐┐┐