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3 years ago

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It is possible to maintain a pressure of 10 kPa in a condenser that is being cooled by river water entering at 20 °C?

1 answer:

vovangra [49]3 years ago

5 0

Answer:

Yes, it is possible to maintain a pressure of 10 kPa in a condenser that is being cooled by river water that is entering at 20 °C because this temperature (20 °C) of the external cooling water is less than the saturation temperature of steam which is which is 45.81 °C, and heated by a boiler; as a result of this condition, coupled with the assumption that the turbine, pump, and interconnecting tube are adiabatic, and the condenser exchanges its heat with the external cooling river water, it possible to maintain a pressure of 10 kPa.

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Answer:

percentage change in volume = 0.00285 %

Explanation:

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bulk stress = $10^{7}$ N/m²

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we will apply here bulk modulus formula that is

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The inside temperature, $T_{in}$ is approximately 248 °C.

Explanation:

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Heat lost by radiation = 300 W

Assumption,

Air temperature = 20 °C

Hot plate temperature = 250 °C

Thermal conductivity K = 65.2 W/(m·K)

Steady state heat transfer process

One dimensional heat conduction

We have;

Newton's law of cooling;

q = h×A×( $T_s$ - $T_{\infty$ ) + Heat loss by radiation

= 25×0.325×(250 - 20) + 300

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The rate of energy transfer per second is given by the following relation;

$P = \dfrac{K \times A \times \Delta T}{L}$

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Therefore;

$2456.25 = \dfrac{65.2 \times 0.375 \times (250 - T_{in})}{0.02}$

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The inside temperature, $T_{in}$ = 247.99 °C ≈ 248 °C.

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3 years ago