Applied Thermodynamics [ME 504]

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APPLIED THERMODYNAMICS

3.3.1 Basic vapor absorption refrigeration system, practical vapor absorption

ME 504

refrigeration system and Electrolux vapor absorption refrigeration

Lecture

:

3

Year

: II

system

Tutorials

:

1

Part

: I

3.3.2 Comparison between vapor compression and vapor absorption type

Practical

: 3/2

refrigeration systems

Course Objectives:

3.4

Refrigerants

3.4.1

Introduction

To understand the diverse fields of applications thermodynamics and to implement

3.4.2

Classifications of refrigerants

the laws of thermodynamics and to analyze the working of various components of

3.4.3 Desirable properties of an ideal refrigerant

mechanical systems using laws of thermodynamics.

3.4.4 Properties and uses of commonly used refrigerants

1.

Boilers

(12 hours)

4.

Air-Conditioning

(14 hours)

1.1

Introduction and applications

4.1

Definition and scope of air-conditioning

1.2

Classifications and comparison among various types of boilers

4.2

Psychometrics and properties of air

1.3

Requirements of an ideal boiler

4.3

Psychometric chart

1.4

Boiler mountings and accessories: water level indicator, feed check valve,

4.4

Various processes on psychometric chart and their analysis: sensible heating ,

Blow off cock, steam separator, safety valves, Feed pump, air preheater, super

sensible cooling, cooling with dehumidification, cooling with humidification,

heater and economizer

heating with dehumidification, heating with humidification, adiabatic mixing of

1.5

Water conditioning

two streams of moist air

1.5.1 Water problems and Benefits of water conditioning

4.5

Air-conditioning systems:

DX system, all air system, all water system, air-

1.5.2

Constituents and Characteristics of water

water system, merits and demerits of each system

1.5.3 Types and causes of scale and deposits

4.6

Components of air-conditioning systems: Ducts, Fans, Grills, Registers,

1.5.4

Scale deposit prevention methods

Diffusers, Balancing dampers, Air filters, Air handling units, Fan coil units,

Humidifiers and Dehumidifiers

2.

Air Compressors

(9 hours)

2.1

Introduction and classifications of air compressors

2.2

Primary components of a reciprocating compressor

2.3

Processes of a reciprocating compression on P-v diagram, clearance volume,

swept volume, total volume, and effective swept volume and work done, effect

of clearance volume on performance of compressor

2.4

Volumetric, adiabatic and isothermal efficiencies

2.5

Multi stage compression and its advantages, inter-cooling, work done of multi

stage compression with and without clearance volume on representation of

processes on P-v and T-s diagrams

2.6

Other types of air compressors: Centrifugal type, axial type, Roots blower,

Rotary type, screw type

2.7

Comparison among various type of air compressor

3.

Refrigeration

(10 hours)

3.1

Definition and applications of refrigeration

3.2

Simple and modified vapor compression refrigeration cycles

3.2.1 Ideal and actual vapor compression refrigeration cycles

3.2.2 Representation of corresponding processes on P-h and T-s diagram

3.2.3 Work done and coefficient of performance

3.3

Vapor absorption refrigeration system

Practical:

1.Performance of air compressor

2.Performance of vapor compression refrigeration system and electrolux type refrigerator

3.Air-conditioning processes: Cooling with dehumidification and cooling with humidification; Heating with dehumidification and heating with humidification

4.Air-conditioning process: Mixing of two streams of moist air

5.Performance of cooling Tower

6.Study of components of air-conditioning systems.

References:

1.Bernard D. Wood, “Applications of Thermodynamics”, Waveland Press Inc., Illinois.

2.Carrier Air-conditioning Company, “Hand boor of Air-conditioning, System Design” , McGraw-Hill.

3.American Society of Heating Refrigerating and Air-conditioning Engineers (ASHRAE), “ASHRAE Hand books”, ASHRAE.

4.S.C. Arora and S. domkudwar, “ A course Refrigeration andAir-conditioning”, Dhanpat rai and Sons, Delhi.

5.R.K. Rajput, “Thermal engineering” Laxmi Publications, New Delhi.

6.R.K. Rajput, “Refrigeration and air-conditioning”, S.K. Kataria & Sons.

Evaluation Scheme:

The questions will cover all the chapters of the syllabus. The evaluation scheme will be as indicated in the table below:

Unit

Chapter

Topics

Marks

1

1

1.1 to 1.4

16

2

1

1.5

16

4

4.5 to 4.6

3

2

all

16

4

3

all

16

5

4

4.1 to 4.4

16

Total

80