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
Svetlanka [38]
3 years ago
15

In a vapor-compression refrigeration cycle, ammonia exits the evaporator as saturated vapor at -10°C. The refrigerant enters the

condenser at 16 bar and 160°C, and saturated liquid exits at 16 bar. There is no significant heat transfer between the compressor and its surroundings, and the refrigerant passes through the evaporator with a negligible change in pressure. If the refrigerating capacity is 150 kW, determine (a) the mass flow rate of refrigerant, in kg/s (b) the power input to the compressor, in kw (c) the coefficient of performance (d) the isentropic compressor efficiency Round answers to 3 significant digits. (a) 0,1444 (b) 52.99 (c) 2.83 (d) 88.26
Engineering
1 answer:
sergij07 [2.7K]3 years ago
8 0

Answer:  (a) 0,142 (b) 52.99 (c) 2.83 (d) 88.26

Explanation:

If the refrigarating capacity is 150kw

(a) the mass flow rate of refrigerant, in kilograms per second  is 0.142

(b) the power input to the compressor, in kilowatts is 52.99

(c) the coefficient of performance is 2.83

(d) the isentropic compressor efficiency is 68.6 per cent

You might be interested in
In which of the following states would homes most likely have the deepest foundation?
Evgen [1.6K]

Answer:

D) Louisiana, to prevent homes from blowing away in hurricanes.

Explanation:

Louisiana is famous for hurricanes i think that if they were well prepared and had deeper foundation the damage may lower by a good lot.

5 0
3 years ago
If the maximum allowable shear stress is 70 MPa, find the shaft diameter needed to transmit 40 kW when the shaft speed is 250 rp
victus00 [196]

Answer:

The diameter is 50mm

Explanation:

The answer is in two stages. At first the torque (or twisting moment) acting on the shaft and needed to transmit the power needs to be calculated. Then the diameter of the shaft can be obtained using another equation that involves the torque obtained above.

T=(P×60)/(2×pi×N)

T is the Torque

P is the the power to be transmitted by the shaft; 40kW or 40×10³W

pi=3.142

N is the speed of the shaft; 250rpm

T=(40×10³×60)/(2×3.142×250)

T=1527.689Nm

Diameter of a shaft can be obtained from the formula

T=(pi × SS ×d³)/16

Where

SS is the allowable shear stress; 70MPa or 70×10⁶Pa

d is the diameter of the shaft

Making d the subject of the formula

d= cubroot[(T×16)/(pi×SS)]

d=cubroot[(1527.689×16)/(3.142×70×10⁶)]

d=0.04808m or 48.1mm approx 50mm

7 0
4 years ago
if you’re disassembling a master cylinder and the front piston assembly is stuck in the master cylinder you can
lianna [129]

Answer:

Put water in the cylinder then push the piston inward

Explanation:

When water is put it displaces all the air making it possible for the piston to be pulled easier and without distraction

6 0
3 years ago
Con que otro nombre se le conoce a los delitos informaticos
kow [346]
Repuesto: Cyberdelito
7 0
3 years ago
An Ocean Thermal Energy Conversion (OTEC) power plant built in Hawaii in 1987 was designed to operate between the temperature li
lukranit [14]

Answer:

Detailed solution is given below

4 0
3 years ago
Read 2 more answers
Other questions:
  • 21.13 The index of refraction of corundum (Al2O3) is anisotropic. Suppose that visible light is passing from one grain to anothe
    5·1 answer
  • Question 6: Which of the following is NOT true if you are changing into a
    10·1 answer
  • What does the branch of physics include
    13·1 answer
  • What was the most recent technological shift in society
    10·1 answer
  • ANSWER AT LEAST ONE PLZZ
    5·1 answer
  • Complete the following sentence.
    7·1 answer
  • The housing for a certain machinery product is made of two components, both aluminum castings. The larger component has the shap
    10·1 answer
  • two cars travel on a straight road from the point. A to point B both cars accelerate to their maximum speed and then continue at
    10·1 answer
  • There do u know it.............
    15·1 answer
  • An AM signal having a carrier frequency of 460 kHz is to be mixed with a local oscillator signal at a frequency of 1135 kHz. Wha
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!