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

Aliens have landed on earth and they come to your class

Aliens have landed on earth and they come to your class first. They are very frustrated because they can not communicate with you. Develop a plan to break this communication barrier and show them that we are friendly peo ...

A liquid water cooled compressor compresses hydrogen with

a liquid water cooled compressor compresses hydrogen with an isentropic efficiency of 70%. the inlet pressure and temperature are 50 kPa and 300 K, while the outlet pressure is 3 MPa. The mass flow rate is 2 kg/s. Assume ...

If cable ad is tightened by a turnbuckle and develops a

If cable AD is tightened by a turnbuckle and develops a tension of 1700lb , determine the tension developed in cable AB. If cable AD is tightened by a turnbuckle and develops a tension of 1700lb , determine the tension d ...

Derive an expression for the instantaneous electromagnetic

Derive an expression for the instantaneous electromagnetic torque during a three phase short circuit at the terminals. Assume the stator terminals of the machine are initially open-circuited and the speed does not change ...

What is meant by each of the following terms modulation

What is meant by each of the following terms: modulation, modulating signal, carrier signal, modulated signal, and demodulation? Explain the following types of signal modulation giving an application for each case: (a) A ...

Application receive-transmit system to evaluate the

Application: Receive-transmit system. To evaluate the properties of an antenna, two identical antennas are used in a receive-transmit system. The two antennas are placed a distance d = 10 km apart and one antenna transmi ...

What are the essential hardware components in a basic

What are the essential hardware components in a basic microcontroller? Using a schematic diagram show the organization of such a basic computer. Explain the acronyms RAM, ROM, PROM, EPROM, and EEPROM (or, EAPROM). What i ...

Resonant frequencies in rectangular cavity a rectangular

Resonant frequencies in rectangular cavity. A rectangular cavity resonator is 60 mm long, 30 mm high, and 40 mm wide and is air filled. Calculate (a) The TE 101 resonant frequency. (b) The next three non-degenerate TE re ...

Multiaxial statesthe computing project multiaxial states

Multiaxial States The computing project Multiaxial States concerns the analysis of strain and stress at a point in a solid body. The goal is to write a MATLAB program that will allow the computation of the strain associa ...

A furnace used in a chemical process is controlled in the

A furnace used in a chemical process is controlled in the following manner. The furnace is turned on in the beginning of the process. When the temperature within the furnace reaches a certain threshold value To, the (tem ...

  • 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

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate