The sun can be treated as a blackbody at 5780 K. Using an appropriate software, calculate and plot the spectral blackbody emissive power Ebl of the sun versus wavelength in the range of 0.01 to 1000 mm. Discuss the results.

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Ответ:

mairxaromo

26.10.2020

Engineering

The mass flow rate of air through the compressor is = 1.044 $\frac{kg}{s}$

Explanation:

Mass flow rate refrigerant $m_{ref}$ = 0.1 $\frac{kg}{s}$

$T_{1}$ = - 0 °c = 273 K

$T_{2}$ = 50 °c = 323 K

$W_{in}$ = 3 KW

$T_{3}$ = 20 °c = 293 K

$T_{4}$ = 30 °c = 303 K

From the continuity equation

$m_{1} h_{1} + W_{in} + m_{a} h_{3} = m_{2} h_{2} + m_{a} h_{4}$

$m_{1} = m_{2}$ = 0.1 $\frac{kg}{s}$

$m_{1} h_{1} - m_{2} h_{2} + W_{in} = m_{a} h_{4} - m_{a} h_{3}$

$m C_{p} (T_{1} - T_{2} ) + W_{in} = m_{a} C_{a} (T_{4} - T_{3})$

Put all the values in above formula

0.1 × 1.5 × ( 273 - 323 ) + 3 = $m_{a}$ × 1.005 × ( 303 - 293 )

10.5 = $m_{a}$ × 10.05

$m_{a}$ = 1.044 $\frac{kg}{s}$

Therefore the mass flow rate of air through the compressor is = 1.044 $\frac{kg}{s}$

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