+1-415-315-9853

info@mywordsolution.com

## Engineering

 Civil Engineering Chemical Engineering Electrical & Electronics Mechanical Engineering Computer Engineering Engineering Mathematics MATLAB Other Engineering Digital Electronics Biochemical & Biotechnology

problem 1)a) Define the following

(i) Process

(ii) Intensive property

(iii) open system

(iv) Thermodynamic equilibrium

b) Show that internal energy is a property of the system.

c) Air at a temperature of 15°C passes through a heat exchanger at a velocity of 30 m/s where its temperature is raised to 800°C. It then enters a turbine with the same velocity and expands until the temperature falls to 650°C. On leaving the turbine air is taken at a velocity of 60 m/s to a nozzle where it expands until the temperature has fallen to 500°C. If the air flow rate is 2 kg/s, find out:

(i)Rate of heat transfer to air in the heat exchanger

(ii)Power output from the turbine assuming adiabatic conditions

(iii) Velocity at the exit of the nozzle. Take enthalpy of air as Cpt where Cp is the specific heat of air (=1.005 kJ/kgK) and t is the temperature.

problem 2)a) Derive the expression for thermal efficiency of a diesel cycle in terms of compression ratio, cut off ratio and ratio of specific heats.

b) A two stage air compressor receives 0.238 m3/s of air at 1 bar and 27°C and discharges it at 10 bar. The polytropic index of compression is 1.35. Assuming perfect inter cooling, determine

(i) the minimum power required for compression

(ii) Power needed for single stage compression to the same pressure

(iii) Maximum temperature in both cases.

problem 3)a) With neat sketches describe the effect of super heating and subcooling on the vapor compression refrigeration cycle.

b) Derive an expression for volumetric efficiency of a reciprocating air compressor in terms of clearance ratio and the pressure ratio.

c) In a gas turbine plant working on Brayton cycle, air at the inlet is at 27°C and 0.1MPa. The pressure ratio is 6.25 and maximum temperature is 800°C. The turbine and compressor efficiencies are each 80%. Find:

(i) Turbine exhaust temperature

(ii) cycle efficiency

Mechanical Engineering, Engineering

• Category:- Mechanical Engineering
• Reference No.:- M96477

Have any Question?

## Related Questions in Mechanical Engineering

### Compute a reasonable torque for an as-received unlubricated

Compute a reasonable torque for an as-received, unlubricated 1/2 -32  = 4 SAE J429 GR 5 bolt in a nonsafety-related normal application ?  Compare your torque to that suggested in Appendix E ?  When estimating bolt tensio ...

### 1 why are micropower plants so different from larger ones

1. Why are micropower plants so different from larger ones? In what cases are they recommended? 2. Discuss which of the conventional alternative sources of energy is more suitable for use with induction generators to pro ...

### 1 determine the capillary rise for a water-air-glass

1. Determine the capillary rise for a water-air-glass interface at 40°C in a clean glass tube having a radius of 1 mm. 2. Determine the difference in pressure between the inside and outside of a soap film bubble at 20 °C ...

### Name some of the problems created by incorrect torque how

Name some of the problems created by incorrect torque ? How much preload do we want, in general? How much torque versus initial preload can you expect to encounter when tightening a group of unlubricated, as received, st ...

### There are 3 x 103 spheres in a box calculate the number of

There are 3 x 10 3 spheres in a box. Calculate the number of different combinations for the spheres in order to have 1100 spheres in the front third of the box. Assuming that the distribution is normal, calculate the pro ...

### The propeller of a wind generator is supported by a hollow

The propeller of a wind generator is supported by a hollow circular shaft with 0.4 m outer radius and 0.3 m inner radius. The shear modulus of the material is G = 80 GPa. (a) If the propeller exerts an 840 kN · m torque ...

### Assignmentfor this homework you will be creating scripts in

ASSIGNMENT For this homework you will be creating scripts in SciLab. You will turn in electronically, each of the scripts requested below. This is not a group project, so do your own work. Contact me if you have any ques ...

### Water in an open cylindrical tank 15 ft in diameter

Water in an open cylindrical tank 15 ft in diameter discharges into the atmosphere through a nozzle 2 in. in diameter. Neglecting friction and the unsteadiness of the flow, find the time required for the water in the tan ...

### Extend the analyses of the three narrow-gate effects to

Extend the analyses of the three narrow-gate effects to include the voltage dependent bulk charge. Give two numerical examples using the submicron transistors of problem P685.5. Problem P685.5 Extend the analyses of the ...

### I need research paper of 3 pages about any topics in

I need research paper of 3 pages about any topics in Thermodynamics. 1. Benedictine Orphanage and a new medical building in Tanzania are in need of power supply.  Please design a system which provides power economically ...

• 13,132 Experts

## 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.

### 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