Power Machines 1

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20 Terms

1
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ΣdQ=ΣdW

Ms*heat gained=network

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hg

Q²-Q¹= heat gain/loss

3
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Ms

Mass of steam(kg/s)

4
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u

internal energy (kj/kg)

5
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Q

heat (kj/kg)

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W

work done(kg/kj)

7
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Ts

saturation temperature

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hf

liquid enthalpy

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hfg

latent heat

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hsup

superheated enthalpy

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Vg

specific volume of the dry steam in m³/kg

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hg

hg+hfg

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Hsup

hg+Cp(Tsup-Ts)

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hwet

hf+xhfg

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Constant Volume

V¹=V²

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16
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Constant pressure

P¹=P²

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Constant Temperature or isothermal

PV=C

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Polytropic

PV^n=C

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Adiabatic

PV^r=C

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20
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The steady flow energy equation

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