Ask Mechanical Engineering Expert

problem 1

A compressor installed at a whalf (for loading container ships) is capable to give 6 bar.g pressures in the pressure receiver. The compressor is shifted to a site which is 5000 ft above sea level (atmospheric pressure 0.85 bar.a) in the mountains. What is the discharge revised discharge pressure (gauge pressure) of compressor?

Suppose there is no change in the temperature.

Part (a)

Is the assumption of change in the temperature valid for computing the discharge pressure of compressor?

Part (b)

The temperature at the whalf is 35 oC and in the mountains is 19 oC, what is the diminution in volumetric output from compressor?

problem 2

The system on site is a pressure sand filter, with a service curve. The filter is backwashed by using the feed pump, at a higher flow rate, shown as backwash curve.

1324_centrifigual pump curve.jpg

 Service duty point: 3 m3/h
Backwash duty point: 9 m3/h

Part (a)

What is the speed of the pump to get the service and backwash flow rates?

Part (b)

What would be the best manner to control the speed of the pump? Why?

Part (c)

The pump is set up as a fixed speed steady pressure system (pump runs once system pressure reaches 550 kPa, turns off, when pressure drops to 450 kPa plant re-starts) to maintain a system pressure of 500 kPa at discharge of the pump. What would be the service and backwash rates from the pump?

problem 3

We have a reciprocating compressor operating at the 800 rpm.  Suction pressure and discharge pressure are held constant through other systems which have nothing to do with the compressor.  We raise the speed from 800 to 840 rpm (a 5% raise).

Part a. what is the change in flow rate through the compressor Flow increases by (840/800) or 1.05, or 5% increase? 

Part b. what is the change in pressure rise through the compressor. 

Part c. what is the change in power that must be delivered to the compressor?

Mechanical Engineering, Engineering

  • Category:- Mechanical Engineering
  • Reference No.:- M9859

Have any Question?


Related Questions in Mechanical Engineering

The aim of the project is to demonstrate certain aspects of

The aim of the project is to demonstrate certain aspects of engineering materials in different applications. The projects will be assessed on the basis of a written Research Report. The report should clearly show what yo ...

Force exerted by jet on moving cart1 you need to determine

Force Exerted By Jet On Moving cart. 1. You need to determine the velocity of water that comes out from the nozzle of this system. need the equation please formulate the equation. 2. This water will strike a small cart a ...

Mechanical engineering assignment task - solve the given

Mechanical Engineering Assignment Task - Solve the given problem. Task 1 - A spring with a one-turn loop of 40mm mean radius is formed from a round section of wire having 5 mm diameter. The straight tangential legs of th ...

Projectflow processing of liquor in a mineral refining

Project Flow Processing of Liquor in a Mineral Refining Plant The aim of this project is to design a flow processing system of liquor (slurry) in a mineral (aluminum) refining plant. Aluminum is manufactured in two phase ...

Heat transfer and combustionyou will need graph paper a

HEAT TRANSFER AND COMBUSTION You will need graph paper, a calculator, a copy of Appendix 1 from lesson HTC - 4 - 2 and access to steam tables to answer this TMA. 1. A fuel gas consists of 75% butane (C 4 H 10 ), 10% prop ...

Assignment -q1 explain the difference between the

Assignment - Q1. Explain the difference between the metacentric height of a ship during 'Partially Afloat condition and 'Free Floating' condition; aid a sketch to support your answer. Q2. With the aid of sketches, explai ...

Materials behaviour from atoms to bridges assignment -

Materials Behaviour from Atoms to Bridges Assignment - Distributed loads and static equilibrium (Please note: you should show your steps with necessary figures) Q1. Two beam sections are jointed at C and supported at A b ...

Questions -q1 a qualitative estimate of the effect of a

Questions - Q1. A qualitative estimate of the effect of a wind-tunnel contraction (Figure) on turbulent motion can be obtained by assuming that the angular momentum of eddies does not change through the contraction. Let ...

Assignment - machine learning for signal processingproblem

Assignment - Machine Learning for Signal Processing Problem 1: Instantaneous Source Separation 1. As you might have noticed from my long hair, I've got a rock spirit. However, for this homework I dabbled to compose a pie ...

Problem -a long pipe od 1413 mm id 1318 mm kp 20 wmk

Problem - A long pipe (OD = 141.3 mm, ID =131.8 mm, k p = 20 W/m.K) supplies hot pressurized liquid water at 400 K to a heater in a factory. The pipe has an insulation thickness of 100 mm. A new efficient heater replaces ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Why might a bank avoid the use of interest rate swaps even

Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate

Describe the difference between zero coupon bonds and

Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p

Compute the present value of an annuity of 880 per year

Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As

Compute the present value of an 1150 payment made in ten

Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int

Compute the present value of an annuity of 699 per year

Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As