All Materials regarding to B.tech R-20 in Mechanical Engineering in 4th Year 1st Semester with unit wise for Every Subjects are available.
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| Mech 4-1 Refrigeration and Air Conditioning | ||
|---|---|---|
| S.No | Chapters / Units | Download Link |
| 1 | Unit 1 | Download |
| 2 | Unit 2 | Download |
| 3 | Unit 3 | Download |
| 4 | Unit 4 | Download |
| 5 | Unit 5 | Download / Part B |
Mech 4-1 RAC Important Topics Questions
Course Objectives:
1) To illustrate the operating cycles and different systems of refrigeration
2) To analyze cooling capacity and coefficient of performance of vapour compression
refrigeration systems and understand the fundamentals of cryogenics
3) To calculate coefficient of performance by conducting test on vapour absorption and steam jet
refrigeration system and understand the properties refrigerants.
4) To calculate cooling load for air conditioning systems and identify the requirements of comfort
air conditioning
5) To describe different component of refrigeration and air conditioning systems
UNIT– I:
INTRODUCTION TO REFRIGERATION: Necessity and applications – unit of refrigeration
and C.O.P. – Mechanical refrigeration – types of ideal cycles of refrigeration. air refrigeration: Bell
Coleman cycle - open and dense air systems – refrigeration systems used in air crafts and problems.
UNIT– II:
VAPOUR COMPRESSION REFRIGERATION SYSTEM &COMPONENTS: Working
principle and essential components of the plant – simple vapour compression refrigeration cycle –
COP – representation of cycle on T-S and p-h charts – effect of sub cooling and super heating –
cycle analysis – actual cycle influence of various parameters on system performance – use of p-h
charts – numerical problems.
INTRODUCTION TO CRYOGENICS: Joule-Thomson expansion, refrigerant mixtures, multi
stage vapour compression refrigeration.
UNIT– III:
REFRIGERANTS – Desirable properties – classification - refrigerants –green refrigerants -
nomenclature – ozone depletion – global warming.
VAPOR ABSORPTION SYSTEM: Calculation of maximum COP – description and working of
NH3 – water system and Li Br –water ( Two shell & Four shell) System, principle of operation three
fluid absorption system, salient features.
STEAM JET REFRIGERATION SYSTEM: Working Principle and basic components, principle
and operation of thermoelectric refrigerator and vortex tube.
UNIT– IV:
INTRODUCTION TO AIR CONDITIONING: Psychometric properties & processes –
characterization of sensible and latent heat loads –– need for ventilation, consideration of infiltration
– load concepts of RSHF, GSHF- problems, concept of ESHF and ADP temperature.
Requirements of human comfort and concept of effective temperature- comfort chart –comfort air
conditioning – requirements of industrial air conditioning, air conditioning load calculations.
UNIT– V:
AIR CONDITIONING SYSTEMS: Classification of equipment, cooling, heating humidification
and dehumidification, filters, grills and registers, fans and blowers. heat pump – heat sources –
different heat pump circuits.
TEXT BOOKS:
1. A Course in Refrigeration and Air conditioning / SC Arora &Domkundwar / Dhanpatrai
2. Refrigeration and Air Conditioning / CP Arora / TMH.
REFERENCES:
1. Refrigeration and Air Conditioning / Manohar Prasad / New Age.
2. Principles of Refrigeration /Dossat / Pearson Education.
3. Basic Refrigeration and Air-Conditioning / Ananthanarayanan / TMH
Course Outcomes: At the end of the course, student will be able to
CO1: Illustrate the operating cycles and different systems of refrigeration.
CO2: Analyze cooling capacity and coefficient of performance of vapour compressionrefrigeration
systems and understand the fundamentals of cryogenics
CO3: Calculate coefficient of performance by conducting test on vapour absorption and steam jet
refrigeration systems and understand the properties of refrigerants.
CO4: Solve cooling load for air conditioning systems and identify the requirements of comfort air
conditioning.
CO5:Demonstrate different components of refrigeration and air conditioning systems.
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