1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vesnalui [34]
4 years ago
7

A heat engine receives 6 kW from a 250oC source and rejects heat at 30oC. Examine each of three cases with respect to the inequa

lity of Clausius. Which process is possible. What is the maximum power available?
a) Pout = 3 kW (power out)

b) Pout = 2 kW

c) Carnot Cycle.
Engineering
1 answer:
taurus [48]4 years ago
6 0

Answer:

Explanation:

Given

T_h=250^{\circ}C\approx 523\ K

T_L=30^{\circ}C\approx 303\ K

Q_1=6 kW

From Clausius inequality

\oint \frac{dQ}{T}=0  =Reversible cycle

\oint \frac{dQ}{T}  =Irreversible cycle

\oint \frac{dQ}{T}>0  =Impossible

(a)For P_{out}=3 kW

Rejected heat Q_2=6-3=3\ kW

\oint \frac{dQ}{T}= \frac{Q_1}{T_1}-\frac{Q_2}{T_2}

=\frac{6}{523}-\frac{3}{303}=1.57\times 10^{-3} kW/K

thus it is Impossible cycle

(b)P_{out}=2 kW

Q_2=6-2=4 kW

\oint \frac{dQ}{T}= \frac{Q_1}{T_1}-\frac{Q_2}{T_2}

=\frac{6}{523}-\frac{4}{303}=-1.73\times 10^{-3} kW/K

Possible

(c)Carnot cycle

\frac{Q_2}{Q_1}=\frac{T_1}{T_2}

Q_2=3.47\ kW

\oint \frac{dQ}{T}= \frac{Q_1}{T_1}-\frac{Q_2}{T_2}

=\frac{6}{523}-\frac{3.47}{303}=0

and maximum Work is obtained for reversible cycle when operate between same temperature limits

P_{out}=Q_1-Q_2=6-3.47=2.53\ kW

Thus it is possible

You might be interested in
Physical items produced in an economy are known as
Arisa [49]
I don’t think I know that
6 0
3 years ago
What is the resistance of a resistor if the current flowing through it is 3mA and the voltage across it is 5.3V?
Flura [38]

Answer: 1766.667 Ω = 1.767kΩ

Explanation:

V=iR

where V is voltage in Volts (V), i is current in Amps (A), and R is resistance in Ohms(Ω).

3mA = 0.003 A

Rearranging the equation, we get

R=V/i

Now we are solving for resistance. Plug in 0.003 A and 5.3 V.

R = 5.3 / 0.003

= 1766.6667 Ω

= 1.7666667 kΩ

The 6s are repeating so round off to whichever value you need for exactness.

6 0
1 year ago
As temperature decreases a batteries availability power what
SSSSS [86.1K]
The answer is increases because when something like that decreases it’s always decreasing that probly makes no sense Imao but it’s increases
7 0
3 years ago
How high is the tallest building in the world?
nekit [7.7K]

Answer:

The Burj Khalifa in Dubai is the tallest building and its height is 2,716 feet.

Explanation:

6 0
3 years ago
How can I find the quotient of 27 divided 91.8
gayaneshka [121]
Step 1:
Start by setting it up with the divisor 8 on the left side and the dividend 27 on the right side like this:

8 ⟌ 2 7

Step 2:
The divisor (8) goes into the first digit of the dividend (2), 0 time(s). Therefore, put 0 on top:

0
8 ⟌ 2 7

Step 3:
Multiply the divisor by the result in the previous step (8 x 0 = 0) and write that answer below the dividend.

0
8 ⟌ 2 7
0

Step 4:
Subtract the result in the previous step from the first digit of the dividend (2 - 0 = 2) and write the answer below.

0
8 ⟌ 2 7
- 0
2

Step 5:
Move down the 2nd digit of the dividend (7) like this:

0
8 ⟌ 2 7
- 0
2 7

Step 6:
The divisor (8) goes into the bottom number (27), 3 time(s). Therefore, put 3 on top:

0 3
8 ⟌ 2 7
- 0
2 7

Step 7:
Multiply the divisor by the result in the previous step (8 x 3 = 24) and write that answer at the bottom:

0 3
8 ⟌ 2 7
- 0
2 7
2 4

Step 8:
Subtract the result in the previous step from the number written above it. (27 - 24 = 3) and write the answer at the bottom.

0 3
8 ⟌ 2 7
- 0
2 7
- 2 4
3

You are done, because there are no more digits to move down from the dividend.

The answer is the top number and the remainder is the bottom number.

Therefore, the answer to 27 divided by 8 calculated using Long Division is:

3
8 0
3 years ago
Other questions:
  • 5. A typical paper clip weighs 0.59 g and consists of BCC iron. Calculate (a) the number of
    5·1 answer
  • In a steady-flow industrial process, m kg/s of an ideal gas flows through a heater at a constant mass flow rate. It is your job
    7·1 answer
  • A transmitter on the moon emits sound and light waves to a receiver on Earth. The light waves are picked up by the receiver but
    10·1 answer
  • The probability density function of the time to failure of an electronic component in a copier (in hours) is f(x) = (e^-x/1076)/
    6·1 answer
  • g A circular oil slick of uniform thickness is caused by a spill of one cubic meter of oil. The thickness of the oil slick is de
    8·1 answer
  • A magnesium–lead alloy of mass 7.5 kg consists of a solid α phase that has a composition just slightly below the solubility limi
    10·1 answer
  • Why is using the proper joining technique important? What could go wrong if the wrong joining technique is used?
    15·1 answer
  • What are some constraints related to size, time, or materials? Remember, constraints are limitations, issues, or obstacles.
    6·1 answer
  • As a result of the 1934 requirement that public companies’ annual financial statements be "certified…by independent public accou
    11·1 answer
  • ) A certain polymer is used for evacuation systems for aircraft. It is important that the polymer be resistant to the aging proc
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!