APPLIED THERMODYNAMICS |
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3.3.1 Basic vapor absorption refrigeration system, practical vapor absorption |
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ME 504 |
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refrigeration system and Electrolux vapor absorption refrigeration |
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Lecture |
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3 |
Year |
: II |
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system |
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Tutorials |
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1 |
Part |
: I |
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3.3.2 Comparison between vapor compression and vapor absorption type |
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Practical |
: 3/2 |
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refrigeration systems |
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Course Objectives: |
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3.4 |
Refrigerants |
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3.4.1 |
Introduction |
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To understand the diverse fields of applications thermodynamics and to implement |
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3.4.2 |
Classifications of refrigerants |
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the laws of thermodynamics and to analyze the working of various components of |
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3.4.3 Desirable properties of an ideal refrigerant |
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mechanical systems using laws of thermodynamics. |
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3.4.4 Properties and uses of commonly used refrigerants |
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1. |
Boilers |
(12 hours) |
4. |
Air-Conditioning |
(14 hours) |
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1.1 |
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Introduction and applications |
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4.1 |
Definition and scope of air-conditioning |
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1.2 |
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Classifications and comparison among various types of boilers |
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4.2 |
Psychometrics and properties of air |
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1.3 |
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Requirements of an ideal boiler |
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4.3 |
Psychometric chart |
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1.4 |
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Boiler mountings and accessories: water level indicator, feed check valve, |
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4.4 |
Various processes on psychometric chart and their analysis: sensible heating , |
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Blow off cock, steam separator, safety valves, Feed pump, air preheater, super |
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sensible cooling, cooling with dehumidification, cooling with humidification, |
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heater and economizer |
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heating with dehumidification, heating with humidification, adiabatic mixing of |
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1.5 |
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Water conditioning |
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two streams of moist air |
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1.5.1 Water problems and Benefits of water conditioning |
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4.5 |
Air-conditioning systems: |
DX system, all air system, all water system, air- |
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1.5.2 |
Constituents and Characteristics of water |
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water system, merits and demerits of each system |
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1.5.3 Types and causes of scale and deposits |
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4.6 |
Components of air-conditioning systems: Ducts, Fans, Grills, Registers, |
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1.5.4 |
Scale deposit prevention methods |
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Diffusers, Balancing dampers, Air filters, Air handling units, Fan coil units, |
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Humidifiers and Dehumidifiers |
2. |
Air Compressors |
(9 hours) |
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2.1 |
Introduction and classifications of air compressors |
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2.2 |
Primary components of a reciprocating compressor |
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2.3 |
Processes of a reciprocating compression on P-v diagram, clearance volume, |
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swept volume, total volume, and effective swept volume and work done, effect |
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of clearance volume on performance of compressor |
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2.4 |
Volumetric, adiabatic and isothermal efficiencies |
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2.5 |
Multi stage compression and its advantages, inter-cooling, work done of multi |
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stage compression with and without clearance volume on representation of |
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processes on P-v and T-s diagrams |
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2.6 |
Other types of air compressors: Centrifugal type, axial type, Roots blower, |
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Rotary type, screw type |
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2.7 |
Comparison among various type of air compressor |
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3. |
Refrigeration |
(10 hours) |
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3.1 |
Definition and applications of refrigeration |
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3.2 |
Simple and modified vapor compression refrigeration cycles |
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3.2.1 Ideal and actual vapor compression refrigeration cycles |
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3.2.2 Representation of corresponding processes on P-h and T-s diagram |
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3.2.3 Work done and coefficient of performance |
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3.3 |
Vapor absorption refrigeration system |
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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 |
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1 |
1 |
1.1 to 1.4 |
16 |
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2 |
1 |
1.5 |
16 |
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4 |
4.5 to 4.6 |
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3 |
2 |
all |
16 |
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4 |
3 |
all |
16 |
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5 |
4 |
4.1 to 4.4 |
16 |
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Total |
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80 |