Question

Hydrogen enters the turbine of an Ericsson cycle at 1040 K, 5 bar with a mass flow rate of 1 kg/s. At the inlet to the compressor the condition is 300 K and 1.5 bar. Assuming the ideal gas model and ignoring kinetic and potential energy effects, determine:
a. the net power developed, in KW.
b. the thermal efficiency.
c. the back work ratio.

Answer 1

Answer:

a)

Calculate the net power developed by using

the following relation:

Wste=W-W.

Substitute 8728 kw for w, and 2846 kw for w..

Wyle=8728 - 2846

= 5882 kW

Therefore, the net power developed is 5882 kW).

Comment

Step 6 of 7 A

Calculate the thermal efficiency by using the

following relation:

Here, e, is the heat input.

Substitute w, for ..

w

Substitute s882 kw for ws and 8728 kw for w.

5882

1-8728

67.39%

Therefore, the thermal efficiency is 67.39%).

Comments (3)

Step 7 of 7 A

Calculate the back work ratio.

bwr =

Substitute 8728 kw for w, and 2846 kw for w..

bwr - 2846

bwr=8728

=0.326

Therefore, the back work ratio is 10.326).

Explanation: