REFRIGERATION AND AIR CONDITIONING | BLUE PRINT OF MARKS FOR SEE | mechanical engineering | DIPLOMA 5th and 6th Semester



 REFRIGERATION AND AIR CONDITIONING

 

Course Title: REFRIGERATION AND AIR CONDITIONING

Scheme (L:T:P) : 4:0:0

Total Contact Hours: 52

Course Code:

15ME63F

Type of Course: Lectures, Self Study & Quiz

Credit :04

Core/ Elective:

Elective

CIE: 25 Marks                                                                                                                              SEE:100 Marks

Prerequisites: Knowledge of Applied science, Engineering Mathematics, Thermal engineering

Course Objectives:

Apply knowledge of mechanical engineering related to Refrigeration and Air conditioning equipments and expose the importance of refrigeration equipments, their control and repair and overhauling of these systems.

 Course Outcomes:                                                                                                   

On successful completion of the course, the students will be able to attain CO:

 

Course Outcome

CL

Linked PO

Teaching Hrs

CO1

Understand the principle of refrigeration and Know the types of refrigeration

R/U/A

1,2

07

 

CO2

Explain the concept of various refrigeration systems and familiar with their advantages and disadvantages

 

R/U/A

 

1,2

 

10

 

 

CO3

Know the constructional and working of refrigeration equipments such as Compressor, condensers and Evaporators and the refrigerant flow controls

 

 

R/U

 

 

2

 

 

12

 

CO4

Know the different types of refrigerants

and Application of refrigeration to various areas

 

R/U/A

 

2

 

07

CO5

Appreciate      the                        concept                 of                        Air

Conditioning and know their types

R/U/A

2

08

 

CO6

Familiarize the different tools used to

install              refrigeration        system              and              Air Conditioner

 

U

2

08

 

 

Total sessions

52

Legend: R: Remember U: understand A: Application An: Analysis


 COURSE-PO ATTAINMENT MATRIX                                                                                                   

 

Course

Programme Outcomes

1

2

3

4

5

6

7

8

9

10

REFRIGERATION & AIR CONDITIONING

 

1

 

3

 

0

 

0

 

0

 

0

 

0

 

0

 

0

 

0

Level 3- Highly Addressed, Level 2-Moderately Addressed, Level 1-Low Addressed.

Method is to relate the level of PO with the number of hours devoted to the COs which address the given PO. If >40% of classroom sessions addressing a particular PO, it is considered that PO is addressed at Level 3

If 25 to 40% of classroom sessions addressing a particular PO, it is considered that PO is addressed at Level 2 If 5 to 25% of classroom sessions addressing a particular PO, it is considered that PO is addressed at Level 1

If < 5% of classroom sessions addressing a particular PO, it is considered that PO is considered not-addressed

 

 COURSE CONTENT AND BLUE PRINT OF MARKS FOR SEE                                                                                                   

 

Unit No

 

Unit Name

Hour

Questions to be set for SEE/Marks

Marks weightage

weightage (%)

R

U

A

 

 

1

INTRODUCTION TO REFRIGERATION

07

5

5

5

15

10.34

2

REFRIGERATION CYCLES

10

5

5

20

30

20.68

3

REFRIGERANTS, SYSTEM COMPONENTS

12

5

10

20

35

24.13

4

APPLICATION OF REFRIGERATION

07

-

5

10

15

10.34

5

AIR CONDITIONING

08

5

5

10

20

17.24

 

6

REFRIGERATION AND AIR- CONDITIONING TOOLS

08

 

5

 

10

 

5

 

20

 

17.24

 

Total

52

15

40

80

145

100

Legend: R; Remember, U: Understand A: Application

Text Box: UNIT I: INTRODUCTION TO REFRIGERATION	07Hrs


 

Refrigeration-Definition-Refrigerating effect-unit of refrigeration- Coefficient of performance-Types of Refrigeration-Ice, dry ice, Steam jet, Throttling, Liquid nitrogen refrigeration-Carnot refrigeration Cycle-Air refrigeration/Bell Coleman cycle, PV& TS diagram,(without derivation)-Advantage and disadvantages in air refrigeration-Simple problems.

Text Box: UNIT II: REFRIGERATION CYCLES	10Hrs


Vapour compression refrigeration cycle - Basic Components,-Flow diagram of working of Vapour

compression cycle - Representation of the vapour compression cycle on P-H, T-S & P-V Diagram - Expression for Refrigerating effect, work done and power required - Types of Vapour Compression cycle - Effects of super heating and under cooling, its advantages and disadvantages - Vapour Absorption refrigeration cycle- Flow diagram of working of Vapour Absorption cycle- Comparison of Vapour absorption and vapour compression system- Simple Electrolux system for domestic units- Simple problems on simple vapour compression cycle only


 

Text Box: UNIT III: REFRIGERATION COMPONENTS &FLOWCONTROLS	12Hrs

 

Compressors - types of compressors, -Reciprocating compressor-Centrifugal compressor- Hermetically sealed compressor-- condensers - Air Cooled, water cooled -evaporators – natural convection, forced convection types –Flow controls- Capillary tube- Automatic Expansion valve- Solenoid valve.

Text Box: UNIT IV: REFRIGERENTS &APPLICATION OF REFRIGERATION	07Hrs


 

Refrigerants - properties - selection of refrigerants- Detection of refrigerants leakage- Alternate Refrigerants- testing and charging of refrigeration units –Applications of refrigeration- Cold storage - Dairy refrigeration-Icemaking industry-Transport refrigeration. Introduction to cryogenic engineering-concept.

Text Box: UNIT V: AIR CONDITIONING	08 Hrs


 

Air conditioning –Definition- Factors affecting Air conditioning-Psychrometric processes- sensible heating and cooling-Humidifying and dehumidifying-Air conditioning types-List-Summer-Winter- use of psychometric charts- Equipments used in air conditioning cycle-air filter-dry air filter- humidifier-Types-Steam injection type humidifier-Dehumidifier-Spray type dehumidifier-Fans and blowers-Axial flow and centrifugal flow.

Text Box: UNIT VI: REFRIGERATION & AIRCONDITIONING TOOLS	08Hrs


 

Tools used in refrigeration system- Tools used in Air conditioner installation- Installation procedure of refrigeration systems, charging ,testing, adding the oil to compressor , - Faults in refrigeration and air conditioning system- Servicing procedure of Refrigeration system

®TEXT BOOKS

Sl.No.

Title of Books

Author

Publication

 

1.

Refrigeration and Air Conditioning

Domkundwar- Arora C P

Dhanpat rai and co.

 

2.

Refrigeration and Air Conditioning

Arora C P

Tata McGraw-Hill New Delhi, 3rd

Edition, 2010

3

Basic Refrigetaion And air –

conditioning

P N Anathanarayan

-

4.

Principles of Refrigeration

Roy.J Dossat,

Pearson Education, 4th

Edition , 2006

 

5

Refrigeration and Air Conditioning

Jordon and Prister,

Prentice Hall of India PVT Ltd., New Delhi,

1985.

 

6

Refrigeration and Air Conditioning

Stoecker N.F and Jones,

TMH                NewDelhi,2nd Edition 1982.


1.        , LIST OF SOFTWARES/ LEARNING WEBSITES:                                                                                            

i.  http://nptel.ac.in/courses/112105051/

ii download other power plant related videos from youtube.com for study purpose.

 

 

 SPECIAL INSTRUCTIONAL STRATEGIES                                                                                                   

 

UNIT NO

UNIT NAME

STARATEGIES

1

Introduction to refrigeration

lectures and Power point presentations/ Video/

Video movies

2

Refrigeration cycles

Lectures/Presentations, Showing charts,

3

Refrigerants, system components

Lectures/Presentations,        Showing        charts,

Industrial visits to refrigerator repair shops

4

Application of refrigeration

Lectures/Presentations,        Showing        charts,

Industrial visits to Cold storage

5

Air conditioning

Lectures/Presentations, Showing chart, Video/

Video movies

 

6

Refrigeration and air-conditioning tools

Lectures/Presentations, Showing charts, Industrial visits to Refrigerator/Air conditioner repair work shops

 

 SUGGESTED LIST OF STUDENT ACTIVITYS                                                                                                   

Note: the following activities or similar activities for assessing CIE (IA) for 5 marks (Any one)

å         Each student should do any one of the following type activity or similar activity related to the course and before take up, get it approved from concerned Teacher and HOD.

å         Each student should conduct different activity and no repeating should occur

 

1

Prepare list of various major power plants installed in Karnataka along with their total

capacity.

2

Prepare charts of different high pressure boilers, gas turbine cycles, steam turbine power plant, wind turbine power plant, solar power plant, etc. on half imperial drawing sheet.

Attach the same with term work.

3

Visit websites of NTPC, BHEL,, NHPC, NPCIL, GEDA, SUZLON, GE, SIEMENS,

ENERCON and KPC etc and find out the technical information about their machineries or Plants.

4

Download technical specifications/ catalogues, videos or any other suitable presentations

on gas turbine power plant

5

Download technical specifications/ catalogues, videos or any other suitable presentations

on gas turbine power plant.

6

Visit diesel power plant available in your institute/ nearer to your institute and understand different elements, working, circuits, and specifications.


 Course Assessment and Evaluation Scheme:                                                                                                   

 

 

What

To

who m

When/Where

(Frequency in the course)

Max Marks

Evidence collected

Course outcomes

Direct Assessment

CIE

IA

 

Students

Three IA tests(Average of three tests will be

computed)

 

20

 

Blue books

 

1,2,3,4,5,6

Student activities

05

Activity sheets

1,2,3,4,5,6

SEE

End

Exam

End of the course

100

Answer scripts at

BTE

1,2,3,4,5,6

Indirect Assessment

Student Feedback on

course

 

Students

Middle of the course

 

 

Feedback forms

1,2,3

Delivery of course

End of Course Survey

End of the course

 

 

 

Questionnaires

1,2,3,4,5,6

Effectiveness of Delivery of instructions & Assessment

Methods

CIE- Continuous Internal Evaluation      SEE- Semester End Examination

 

Note: I.A. test shall be conducted for 20 marks. Average marks of three tests shall be rounded off to the next higher digit.

Note to IA verifier: The following documents to be verified by CIE verifier at the end of semester

 

1.       Blue books ( 20 marks)

2.       Student suggested activities report for 5 marks evaluated through appropriate rubrics.

3.       Student feedback on course regarding Effectiveness of Delivery of instructions & Assessment Methods

 

å    MODEL OF RUBRICS /CRITERIA FOR ASSESSING STUDENT ACTIVITY      

 

RUBRICS FOR ACTIVITY( 5 Marks)

 

Dimension

Unsatisfactory

Developing

Satisfactory

Good

Exemplary

Student Score

1

2

3

4

5

 

Collection of data

Does not collect any information relating to the topic

Collects very limited information;

some relate to the topic

Collect much information; but very

limited relate to the topic

Collects some basic information;

most refer to the topic

Collects a great deal of information;

all refer to the topic

Ex: 4

Fulfill team’s roles & duties

Does not perform any duties assigned to the team role

Performs very little duties but unreliable.

 

Performs very little duties

Performs nearly all duties

Performs all duties of assigned team roles

 

 

5


 

Shares work equally

 

Always relies on others to do the work

Rarely does the assigned work; often needs reminding

Usually does the assigned work; rarely needs reminding

 

Normally does the assigned work

Always does the assigned work without having to be reminded.

 

 

3

 

Listen to other Team mates

 

Is always talking; never allows anyone else to speak

Usually does most of the talking; rarely allows others to speak

Talks good; but never show interest in listening others

 

Listens, but sometimes talk too much

 

Listens and speaks a fair amount

 

 

2

Average / Total marks=(4+5+3+2)/4=14/4=3.5=4

 

Note: This is only an example. Appropriate rubrics/criteria may  be  devised  by  the  concerned faculty (Course Coordinator) for assessing the given activity.

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