CameraIcon

SearchIcon

MyQuestionIcon

4

You visited us 4 times! Enjoying our articles? Unlock Full Access!

Internal Energy

In an air com...

Question

In an air compressor for the suction and delivery pressure of 1 bar and 30 bar and flow rate of $4 m^{3} / m i n$ , the minimum work required to run compressor is _____ kW. (Correct to one decimal place}
22.67

Open in App

Solution

The correct option is A 22.67
Work required to run to compressor is minimum if the compression process is isothermal

$∴ W_{m i n} = P V ln \frac{P_{d}}{P_{s}}$

$= 1 \times 10^{5} \times \frac{4}{60} ln (\frac{30}{1}) = 22674.6 W = 22.6746 k W$

Suggest Corrections

thumbs-up

0

Similar questions

Q. Following results are obtained from a test on an air compressor. Compressor delivery stagnation pressure is 2.97 bar and compressor delivery stagnation temperature is 427 K. Ambient condition is 0.99 bar and 288 K. The isotropic efficiency of compressor is (Take

γ = 1.4

Q. A two stage single acting air compressor delivers, 1000 kg/hr of air at 20 bar pressure. The suction occurs at STP conditions . Assume the process to be ideal; the free air delivery is _____

m^{3} / m i n

Q. A two stage compressor takes in air at 1.3 bar and pressure after stage one is 4.7 bar. For minimum work of compression, the pressure at the compressor oulet is

Q. An air refrigerator working on Bell Coleman cycle takes air into the compressor at

- 5^{o} C

and compresses polytropically with

P V^{1.35} = C

5

bar and cools to

25^{o} C

at the same pressure. It is further expanded isentropically in the expander to

1

bar. The isentropic efficiency of expander is

90

%. The net work required is ____

k J / k g

. (Correct upto three decimal place)

Q. A two stage air compressor with perfect intercooling is compressing air from 1 bar to 4 bar The volumetric efficiency for the first and second stage compressors are 0.9 and 0.85. Intermediate pressure is based on least work requirement theory. If the stroke ratio of first and second stage compression is 1.2, the ratio of diameter of second to first stage compressor is

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

First Law of Thermodynamics

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Internal Energy

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon