Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Mechanical Engineering Expert

problem 1: Differentiate between impulse and reaction turbines.

problem 2: A single phase single acting reciprocating air compressor has a bore of 20 cm and a stroke of 30 cm. The compressor runs at 600 rpm. The clearance volume is 4% of the swept volume and index of compression and expansion is 1.3. The suction conditions are 0.97 bar and 27o C and delivery pressure is 5.6 bar. The atmospheric conditions are at 1.01 bar and 17o C. Find out:

a) The free air delivered in m3/min 
b) The volumetric efficiency referred to the free air conditions. 
c) The indicated power.

problem 3: 2 kg/s of air enters the LP cylinder of a two phase reciprocating air compressor. The total pressure ratio is 9. The air at inlet to compressor is at 100 kPa and 35o C. The index of compression in each cylinder is 1.3. Find out the intercooler pressure for perfect inter-cooling. Also, find out the minimum power needed for compression, and percentage saving over single phase compression. Tame R = 0.287 kJ/kg K and Cp = 1 kJ/kg K.

problem 4: A three phase reciprocating air compressor compresses air from 1 bar and 17oC to 35 bar. The law of compression is pv1.25 = c. The law is same for all phases of compression. Find out the minimum power required to compress 15 m3/min of free air. Also find out the intermediate pressures. Suppose that the perfect inter cooling and neglect the clearance.

problem 5: A four cylinder, double acting compressor is needed to compress 30 m3/min of air at 1 bar and 25o C at a pressure of 15 bar. Find out the capacity of motor needed and cylinder dimensions if the following data are given.

a) Speed of the compressor = 310 rpm
b) Clearance volume = 3.5%
c) Stroke to bore ratio = 1.2
d) Mechanical efficiency = 82%
e) Index of compression 1.3

problem 6: One kg or air at 35o C DBT and 60% RH is mixed with 2 kg of air at 20o C DBT and 13o C dew point temperature. Compute the vapors pressure and dew point temperature of stream one, enthalpy of both streams and specific humidity of the mixture.

problem 7: With a schematic diagram, describe the requirement of a winter air conditioning system.

problem 8: Define the term Specific Humidity, Dry Bulb Temperature, Relative Humidity and Wet Bulb Temperature.

problem 9: 100 m3 of air per minute at 15o C DBT and 80% RH are heated till its temperature is 20o C. Compute heat added to air per minute, RH of the heated air and wet bulb temperature of the heated air.

problem10: prepare down the merits and demerits of vapor absorption system over a vapor compression system.

Mechanical Engineering, Engineering

  • Category:- Mechanical Engineering
  • Reference No.:- M93733

Have any Question? 


Related Questions in Mechanical Engineering

A watertight bulkhead 22 ft high forms a temporary dam for

A watertight bulkhead 22 ft high forms a temporary dam for some construction work. The top 12 ft behind the bulkhead consists of sea water with a density of 2 slugs/ft 3  , but the bottom 10 ft begin a mixture of mud and ...

An incompressible fluid flows past a flat plate as in the

An incompressible fluid flows past a flat plate, as in the figure below, with a uniform inlet profile and a polynomial exit profile Compute the volume flow Q across the top surface of the control volume. The plate has wi ...

If you were using a full length centerline gage rod to

If you were using a full length, centerline, gage rod to measure DL, how much change would you expect to see at 2508F?  What DL from ‘‘before tightening'' would you expect to see at 2508F if you were using ultrasonics to ...

A typical diver inhales 0450 liters of air per breath and

A typical diver inhales 0.450 liters of air per breath and carries a 25 L breathing tank containing air at a pressure of 300. bar. As she dives deeper, the pressure increases by 1 bar for every 10.08 m. How many breaths ...

1 in a hartree-fock scf calculation on the chlorine atom

1. In a Hartree-Fock SCF calculation on the chlorine atom using 20 (spatial) basis functions, how many virtual orbitals are determined? 2. Give an example of a restricted Hartree-Fock wavefunction and an unrestricted Har ...

The fugacity and fugacity coefficient are determined as a

The fugacity and fugacity coefficient are determined as a function of pressure and temperature for a model gas. These variables can be varied using sliders. The student is asked to determine the Boyle temperature and als ...

Example how an p-channel flash eprom would work is the

Example how an p-channel flash EPROM would work. Is the p-channel worse or better than the n-channel asides form speed? Estimate the write and erase times (using the Fowler-Nordheim tunneling formulae for a triangular ba ...

1 identify the terms that may arise from the ground

1. Identify the terms that may arise from the ground configurations of the atoms of elements of Period 2 and suggest the order of their energies. 2. Find the first-order corrections to the energies of the hydrogen atom t ...

Please reference any source of outside information as

Please reference any source of outside information as needed to answer these questions. 1. In a frozen food plant, atmospheric air is to go through a pre-cooler to be partially dehydrated so that during its passage throu ...

A closed rigid tank having a volume of 1 m3 contains a

A closed, rigid tank having a volume of 1 m 3 contains a mixture carbon dioxide (CO 2 ) and water vapor initially at 70°C and 200 kPa The mass of water vapor in the tank is 0.10 kg. The tank contents are cooled to 20°C. ...

  • 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

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen