Ask Question, Ask an Expert


Ask Mechanical Engineering Expert

problem 1)a) Define and describe Clausius statement of second law of thermodynamics.

b) Demonstrate that of all the engines operating between a given constant temperature source and a given constant temperature sink the efficiency of a reversible engine is maximum.

c) Air standard limited pressure cycle has compression ratio of 15 and compression begins at 0.1MPa and 40°C. The maximum pressure is limited to 6 MPa and total heat added is 1.675 MJ/kg. find out

(i) heat supplied at constant pressure

(ii) cut off ratio

(iii) Cycle efficiency

problem 2)a) Establish the inequality of clausius.

b) Steam at 30 bar and 350°C is supplied to a steam turbine in a practical regenerative cycle and the steam is bled at 4 bar pressure. The bled steam comes out as dry saturated steam and heats the feed water in an open type feed water heater to its saturated liquid state. The rest of the steam in the turbine expands to a condenser pressure of 0.1bar. Assuming the turbine efficiency to be same before and after bleeding, and neglecting the pump work determine

i) Turbine efficiency

ii) Steam quality at the inlet to the condenser

iii) The cycle efficiency

c) What are the differences between work transfer and heat transfer?

problem 3) List the three basic modes in which the heat is transferred.

b) Describe Fourier’s law of heat conduction

c) A heat engine operating between two reservoirs at 1000K and 300K is used to drive a heat pump which extracts heat from a reservoir at 300K at a rate twice that at which the engine rejects heat to it. If the efficiency of the engine is 40% of maximum possible and COP of the heat pump is 50% of maximum possible, what is the temperature of the reservoir to which heat pump rejects heat? What is the rate of heat rejection from the heat pump if the rate of heat supply to the heat engine is 50 kw.

Mechanical Engineering, Engineering

  • Category:- Mechanical Engineering
  • Reference No.:- M96480

Have any Question? 

Related Questions in Mechanical Engineering

Compare the three types of bridge circuits constant-voltage

Compare the three types of bridge circuits: constant-voltage bridge, constant- current bridge, and half-bridge in terms of nonlinearity, effect of change in temperature, and cost. Obtain an expression for the percentage ...

Radiation resistance an antenna is connected to the source

Radiation resistance. An antenna is connected to the source with a 50 Ω transmission line. The antenna radiates in free space. Calculate the standing wave ratio on the transmission line if: (a) The antenna is a half-wave ...

On the basis of a given load of pulley fg 4000n determine

On the basis of a given load of pulley Fg = 4000N, Determine the load of the bearing rope BA. The load should be the basis for the design of the supporting ropes, pulleys and ropes to mount joints A and B. Basically I ne ...

Application standing wave ratio and minima and maxima on

Application: Standing wave ratio and minima and maxima on the line. A line has a characteristic impedance Z 0 = 50 Ω and a load R = 25 Ω. Calculate: (a) The standing wave ratio on the line. (b) If the voltage at the load ...

Steam enters a turbine operating at steady state at 4 mpa

Steam enters a turbine operating at steady state at 4 MPa, 500°C with a mass flow rate of 50 kg/s. Saturated vapor exits at 10 kPa and the corresponding power developed is 42 MW. The effects of motion and gravity are neg ...

Application tunnels as waveguides the following

Application: Tunnels as waveguides. The following communication system is proposed for communication in mine tunnels to avoid the need for cables: The tunnel is used as a waveguide 5 m wide and 2 m high. (a) What is the ...

Topic torsionallongitudinallateral vibration of rodsa

Topic: Torsional/longitudinal/lateral Vibration of Rods A Bio-MEMS device consists of a microscaled cantilevered rod that senses a biochemical reaction on the surface of the rod. In particular, the mass of the cantilever ...

Application parallel plate resonator a parallel plate

Application: Parallel plate resonator. A parallel plate waveguide is shorted at two locations as shown in Figure 17.32. The distance between shorts is d. Calculate the resonant frequencies of the shorted guide, assuming ...

Complexity of large numbers let an be the set of positive

Complexity of large numbers. Let A(n) be the set of positive integers x for which a terminating program p of length less than or equal to n bits exists that outputs x. Let B(n) be the complement of A(n) [i.e., B(n) is th ...

Te parameters of a dc shunt machine are rf 240 omega lff

The parameters of a dc shunt machine are R f = 240 Ω, L FF = 120 H, L AF = 1.8 H, r a = 0.6 Ω, and L AA = 0. The load torque is 5 N·m and V a = V f = 240 V. Calculate the steady-state rotor speed.

  • 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