32451: Refrigeration Ref & AC 5th Sem Syllabus for Diploma TNDTE M Scheme

Refrigeration detail TNDTE Diploma syllabus for Mechanical Engineering (Refrigeration And Ac) (RA), M scheme is extracted from TNDTE official website and presented for diploma students. The course code (32451), and for exam duration, Teaching Hr/week, Practical Hr/week, Total Marks, internal marks, theory marks, duration and credits do visit complete sem subjects post given below. The syllabus PDFs can be downloaded from official website.

For all other ref & ac 5th sem syllabus for diploma m scheme tndte you can visit Ref & AC 5th Sem Syllabus for Diploma M Scheme TNDTE Subjects. The detail syllabus for refrigeration is as follows.

Rationale:

Basic understanding of refrigeration, refrigeration methods used in industry, calculation of refrigeration capacity by using charts and tables. To acquire knowledge about refrigerants and instruments used in industry. To also impart knowledge about low temperature applications, methods of defrosting.

Objectives:

1. To understand the limitations of Compression cycles & method of producing low temperature
2. To understand basic concepts of Vapour compression system and capacity calculation using relevant tables and charts
3. To acquire knowledge of refrigerants and instruments and its environmental factors
4. Learn about low temperature production and its Industrial applications
5. To understand the concepts of non conventional refrigeration system & defrosting methods.

Unit 1

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Unit 2

Vapour Compression System

Simple vapour compression system – basic components -representation of p-h and T-s diagram with refrigeration effect, work of compression, heat rejection, saturated liquid and vapour line, sub cooled liquid region, superheated vapour region. Effect of liquid sub cooling and superheating, effect of varying suction and discharge pressure. Actual vapour compression cycle – representation on ph & TS diagram – wet compression cycle with superheating and sub cooling – problems involving refrigeration effect, cooling capacity of heat of compression, theoretical power theoretical COP using refrigeration charts and tables. 17

Unit 3

Refrigerants

Refrigerant – classification of refrigerants – primary refrigerants – Halo carbon, chlorofloura carbons, Hydrocarbons, hydrochlora carbons, hydrofloura carbons, mixtures, azeotropes, Geotropes, near azeotrpes, inorganic refrigerants – Properties – Thermodynamic & Thermo physical properties (list only) – Boiling point, freezing point, Evaporator and condenser pressure, critical temp. and pressure, Latent heat, specific volume, specific heat of vapour and liquid, thermal conductivity, dielectric strength- Secondary refrigerants – brine solutions, ethylene glycol, propylene glycol – properties – odour, leak tendency, refrigerant oil miscibility, COP and power requirement cost and availability. Safe working properties – Toxicity, flammability, corrosive property, chemical stability, effect on stored product – Environmental effects of Refrigerants- ozone depletion & global warming – total equivalent global warming impacts – Nano lubricants – facing out refrigerants. 17

Unit 4

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Unit 5

Other Refrigeration Cycles

Vapour absorption system – practical ammonia absorption system -Lithium Bromide System – Electrolux System – No derivation – No problems – Steam jet refrigeration – construction & working -applications – no derivation & no problems Thermoelectric effects – seebeck effect, peltier effect, Thomson effect. Required properties of thermoelectric materials in terms of electrical conductivity, thermal conductivity and rate of change of voltage with temperature. Thermoelectric refrigeration system – Advantages and disadvantages. 16

Text Books:

1. Refrigeration and Air – Conditioning by Arora and Domkundwar , Danpat Rai & Sons Publications

Reference Books:

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For detail syllabus of all other subjects of BE Ref & Ac, M scheme do visit Ref & Ac 5th Sem syllabus for M scheme.

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