training Report of climatic test chamber

8/10/2019 training Report of climatic test chamber

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Defence Research & Development Organization

Defence Laboratory, Jodhpur (Rajasthan)

A

TRAINING REPORT

On

STUDY OF CLIMATIC TEST CHAMBER

Submitted for Partial Fulfilment of the Requirement for the award of

Degree of

BACHELOR OF TECHNOLOGY

In

ELECTRICAL ENGINEERING

Submitted To:

MR. DEEPAK GUPTA

Scientist D

Defence Laboratory Jodhpur

(Raj.)

Submitted By:

Praveen Parihar

4th

B.tech 2011-15

Electrical Engineering

JIET Jodhpur


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CERTIFICATE

This is to certify thatPRAVEEN PARIHARstudent of B.Tech IVthyear VIIthsemester of Electrical

Engineering of Jodhpur Institute of Engineering and Technology, Jodhpur, has successfully

completed his Summer Training under the project Study of Climatic Test Chamber under my

supervision Mr. DEEPAK GUPTAat Defense Research and Development Organization, Defense

Laboratory, Jodhpur.

He has fulfilled the tenure successfully from 2nd

June to 30th

June 2014 with sincerity and

regularity. He was good at understanding the concepts and shown efficient mutual understanding

during his training.

Mr. Deepak Gupta Date

Scientist D 30 June 2014Defense Laboratory

Jodhpur (Raj.)


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ACKNOWLEDGEMENT

It gives me immense pleasure in presenting my training report. I would like to take this opportunity

to express my deepest gratitude to the people, who has contributed their valuable time for helping me

to successfully complete this training.

With great pleasure and acknowledgement I extend my deep gratitude to Dr. S. R. Vadera, Director

Defense Laboratory, Jodhpur for providing me an opportunity to accomplish training at this

esteemed organization.

I am thankful to Mr. Deepak Gupta, Scientist DDiploma in Electronics, Post Diploma in

computer applications, Engineering in Electrical and in Electronics, M.E. in Electrical Control

Systems, also having experience of more than 18 years in the industry. He has provided me

necessary guidance about instruments and gave me directions to proceed my training and helped melot in enhancing my skills.

I would also like to thank my college and my colleagues who directly or indirectly helped me for

providing this opportunity to nurture my professional skills at Defense Laboratory, Jodhpur.

Praveen Parihar

4th

B.Tech 2011-15

JIET, JODHPUR


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ABSTRACT


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CONTENTS

S.No. Chapter No. Chapter Name Page No.

1 Certificate

2 Acknowledgement

3 Abstract

4 1 About defence research & development organization

(DRDO)

5 2 Training Location

6 3 Introduction

7 4 Specifications

8 5 Types of Chambers and Parameters

5.1 Types of Chambers

5.2 Parameters

5.3 Types & Parameters Under Study

9 6 Bench- Top Climatic Test Chamber

6.1 Introduction

6.2 Constructional Details

6.3 Mechanical Diagram

6.4 Various Parts of a Bench- Top CTC

6.5 Types of Available Temperature Sensors

6.6 List of Components Used in the CTC

6.7 Operation and Controlling

10 7 Walk- In Chamber

7.1 Introduction

7.2 Specifications

11 8 Testing of a Product and Analyzing its Parameters

12 9 Other Types of Chambers


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13 10 Conclusion

14 11 Bibliography


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CHAPTER- 1

ABOUT DEFENCE RESEARCH & DEVELOPMENT

ORGANIZATION (DRDO)

The Defence Research and Development Organisation(DRDO) is anagency of theRepublic of India,

responsible for the development of technology for use by themilitary,headquartered inNew Delhi,India. It

was formed in 1958 by the merger of the Technical Development Establishment and the Directorate of

Technical Development and Production with the Defence Science Organisation. It is under the administrative

control of theMinistry of Defence,Government of India.

With a network of 52 laboratories, which are engaged in developing defence technologies covering various

fields, like aeronautics, armaments, electronics, land combat engineering, life sciences, materials, missiles,

and naval systems, DRDO is India's largest and most diverse research organisation.

Vision

Make India prosperous by establishing world class science and technology base and provide our Defence

services decisive edge by equipping them with internationally competitive systems and solutions.

Mission

Design, develop and lead to production state-of-the-art sensors, weapon systems, platforms and alliedequipment for our Defence Services.

Provide technological solutions to the Services to optimise combat effectiveness and to promote well-being of the troops.

Develop infrastructure and committed quality manpower and build strong indigenous technologybase.
http://en.wikipedia.org/wiki/Government_agencyhttp://en.wikipedia.org/wiki/Republic_of_Indiahttp://en.wikipedia.org/wiki/Military_of_Indiahttp://en.wikipedia.org/wiki/New_Delhihttp://en.wikipedia.org/wiki/Ministry_of_Defence_(India)http://en.wikipedia.org/wiki/Government_of_Indiahttp://en.wikipedia.org/wiki/Government_of_Indiahttp://en.wikipedia.org/wiki/Ministry_of_Defence_(India)http://en.wikipedia.org/wiki/New_Delhihttp://en.wikipedia.org/wiki/Military_of_Indiahttp://en.wikipedia.org/wiki/Republic_of_Indiahttp://en.wikipedia.org/wiki/Government_agency


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CHAPTER- 2

TRAINING LOCATION

Defence Laboratory, Jodhpur (DLJ)

Defence Laboratory, Jodhpur was established on 16th May, 1959. DLJ is located at the gateway of TharDesert of Rajasthan. It enhances the operational efficiency of troops in desert warfare and logistics support.The aim of the lab is to undertaken research studies in the following areas:

1. Camouflage & Low Observable Devices

2. Nuclear Radiation Management & Applications

3. Desert Environmental Science & Technologies

In addition to R&D activities in the above field, the lab conducts several training programs to the benefit ofServices and Civil population, e.g. industrial radiography, NBC, radiation safety aspects, water desalination,quality, monitoring and desert meteorology. The lab has also been identified as a material development lab.

The objective of DEST or HMG (Heat Management Group) is the removal of unwanted heat from man andmachine, such as soldiers, electronic devices, systems and semiconductors without negatively affecting theperformance or reliability of adjacent components. Thermal management addresses heat removal byconsidering the ambient temperature (and temperature gradients) throughout the entire product from an overall

system perspective. Thermal removal solutions cover a wide range of options.


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CHAPTER- 4

SPECIFICATIONS

S.No. PART RATING/SPECIFICATION

1. CLIMATIC TEST CHAMBER

Model Number

Sl. No.

CMEI-SPL

CMEI/653/2004-05

2. WORK SPACE 560X750X750 mm

3. INNER MATERIAL Stainless Steel AISI 304

4. TEMPERATURE RANGE

Accuracy & Resolution

-30oC to +120oC

1oC / 0.1oC

5. HUMIDITY RANGE

Accuracy

75% to 90% RH

3% RH

6. TEMPERATURE CONTROL By Eurotherm Make Model 2604 With

ITOOLS Software

7. COMPRESSOR

Make

SR. No.

CR42 (1 nos.)

Kirlosker

CBA-13434

8. REFRIGERATION R-404a

9. HEATER 2KW with safety Thermostat

10. POWER REQUIREMENT 380V- 440V AC, 50Hz, 4- Wire, 3- Phase

with Neutral + Earth


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CHAPTER-5

TYPES OF TEST CHAMBERS & PARAMETERS

5.1 TYPES OF CHAMBERS

Highly Accelerated Life Test (HALT)involves a combination of temperature, shock and vibration to

locate a product weakness and assess the life of a product.

Highly Accelerated Stress Screening (HASS)involves fast temperature cycling and is performed on

production units.

Thermal Cyclinginvolves subjecting an object to extreme changes in temperature within an

environmental chamber while ramping up and down in temperature.

Temperature Chamberssimulate temperature and tests the effects on a product over a range of

temperature conditions. Temperature cycling may be performed while combining environments such ashumidity, altitude, and vibration.

Humidity Chamberssimulate humidity and tests the effects on a product over range of humidity

conditions. Humidity tests may be performed with or without temperature.

Bench top test chambersare used when testing small items and take up minimal floor space.

Thermal Shock chambersthermally shock and stress a product as a result of rapid temperature changes

from extreme cold to hot environments.

Liquid-To-Liquid Thermal Shock chambersimmerse a part/assembly in hot and cold fluids. Product istransferred between hot and cold baths without contamination.

Air-To-Air Thermal Shock chamberstypically involve transferring the product from a hot chamber to a

cold chamber. Configurations include two zone, three zone, and double duty.

AGREE Vibration Chamberscan produce fast temperature changes. These chambers have removable

floors and integrate with a variety of electrodynamic shakers for vertical and/or horizontal vibration.

Temperature and/or humidity environments are also simulated in conjunction with vibration.

Altitude chamberssimulate the effects of low pressure and are capable of altitudes of up to 200,000 feet

above sea level.

Environmental Stress Screening (ESS) chambers are designed to test products for highly accelerated

stress testing and fast ramp rates.

Walk-in chambers are environmentally conditioned rooms that may be configured to almost any size or

footprint. Types of walk-in chambers include modular and welded (unitized) construction. Welded types

are ideal for high temperature testing.

Drive-in chambersare similar to walk-in chambers and are designed for vehicle testing. Temperature,

humidity, vibration, and solar may be simulated.


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5.2 TEST PARAMETERS

The parameters of performance testing for accurate environmental chambers are:

Temperature range

Accuracy of temperature control

Humidity span and its Control Accuracy

Vibrations

Capacity of the chamber.

Corrosion (Salt Fog/ Immersion)

5.3 TYPES OF CTC AND TEST PARAMETERS UNDER STUDY

The following types of Climatic Test Chambers have been studied:

Bench- Top Test Chamber

Walk- In Test Chamber

The following parameters for product testing have been observed:

Effect of Temperature

Effect of Humidity

Effect of Solar Radiations


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CHAPTER-6

BENCH- TOP CLIMATIC TEST CHAMBER

6.1 INTRODUCTION

This type of CTC is a smaller version of the conventional CTCs, which is mainly used to testproducts which are smaller in size, and within a specified limit of parameter changes.

Its operating parameters and operating range is limited to a few values.

6.2 CONSTRUCTIONAL DETAILS

A Bench- Top Climatic test Chamber has double wall construction of 6 thick fiber glass wool

between the inner and the outer walls.

Inner of the chamber is fabricated with mirror finished stainless steel and outer is CRCS with

Electrostatic powder coating. A double lined silicon gasket is provided one on the door and other on

the flange of the chamber. It has been provided with a glass window and a light for checking state ofexperiment being performed inside the chamber.

The above figure shows the Bench- Top Climatic Test Chamber.

It consists of a main cabinet where the product to be tested is placed. On the right side, the control

panel of the chamber is located which is both manual and software controllable.

The left part of the chamber shows the cooling system, which consists of a fan having 1/5HP motor

installed in it.


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6.3 MECHANICAL DIAGRAM

6.4 VARIOUS PARTS OF A BENCH- TOP CTC

1. Temperature Controlling

For gentle and uniform temperature in workspace, one 1/5 HP fan motor with a 94.5

width SS impeller is used.

2. Heaters

This chamber provided with wet and dry heaters to control humidity inside the chamber so

that the specimen could be tested in same environmental condition as that of field.


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3. Solar Radiation Lamp

The Metal Halogen lamp is used having radiation intensity of 100W/m2 with a range of 280 to

3000 mm from a distance of 60 cms to stimulate solar radiation. This lamps radiation is very

much figurative to suns radiation in field.

Fig.: A Solar Lamp

4. Refrigeration System

The refrigeration system is a single stage eco-friendly system with air cooled condensing unit.


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5. Temperature Sensors

The temperature sensor used in this type of CTC is a class Pt-100 RTD (Resistance

Thermometer Detector).

6.5 TYPES OF AVAILABLE TEMPERATURE SENSORS

1. Thermistor

Thermistors are the Thermal Resistors and used fir precision temperature measurement,

control and compensation.

Their working principle is based on the change in the resistance of semiconductor materials

with change in temperature. A thermistor is made up of semiconductor material and has a

negative co-efficient of resistance, i.e., their resistance decreases with the increase in

temperature. This negative temperature co-efficient of the resistance can be as large as

several percent per degree Celsius, thus allowing the thermistor circuit to detect very small

changes in the temperature.

2. Thermocouple

A thermocouple is temperature transducer that s used for measurement of high temperatures.

It works on the principle of Thermo- Electric Effect, which says that when two dissimilar

metals are joined together so as to form a closed circuit, there will be two junctions where

they meet each other. If one of these junctions is heated and other one is kept at fixed lower

temperature, then a current flows in the circuit which can be detected by a galvanometer. The

amount of current produced depends on the difference in the temperature between the twojunctions and on the characteristics of the two metals.


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3. Resistance Temperature Detector (RTD)

This type of temperature transducer is use for the measurement of small temperature

difference as well as for wide range of temperature.

It works on the principle of the utilization of the change in resistance property of certain

metals (conductors). With the increase of the temperature, the electrical resistance of the

certain metals increases in direct proportion to the rise of temperature.

Thus, if the resistance of a wire of known and calibrated material is measured, the

temperature of the wire can be determined.


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6.6 LIST OF COMPONENTS USED IN THE CHAMBER

S.No. PART RATING/SPECIFICATION Number

1. Chamber Fan

Motor

1/5 HP, single phase 230V AC, 0.8

Amps

1 nos

2. Air Heater 0.5 KW Heater 4 nos

3. Controller Microprocessor based

Eurotherm, make 2604 Dual Loop

Programmable With iTools Software

1 nos

4. Blower 9 X 4.5 diameter SS Impeller 1 nos

5. Compressor

ModelSR No

Make

CR42CBA13434

3-phase, 440V AC

Copeland

1 nos

6. Condenser Fan

Motor

Make

FHP, 1400 RPM 230 V

AC, 1 Phase,EBM NARDI

1 nos

7. Evaporator 20 X 14 X 17rows 1 nos

8. Refrigerant Gas R-404a 5 gm

9. Solenoid Valves

Make

3/8 Flair

Flair

Danfoss

2 nos

1 nos

10. Auto Oil Return

Make

OUB-1

Danfoss

1 nos

11. Accumulator 2 ton 1 nos

12. Liquid Drier

Make

3/8 Flair

Danfoss

1 nos


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6.7 OPERATION AND CONTROLLING

Entire chamber is controlled using a State Of Art Eurotherm controller. Indicator cum controller is a

programmable profile dual loop controller. This means that controller can be manually operated or

can be interfaced with a system. Its interfacing facilitates automatic temperature control as preset by

user and moreover readings can be automatically got stored; thus eliminating need of an attendant.


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CHAPTER- 7

WALK- IN CLIMATIC TEST CHAMBER

7.1 INTRODUCTION

Walk-In Environmental Test Chambers are Capable of testing large components, assemblies, and finishedproducts. They simulate a wide range of temperature and humidity environments. These chambers can be used

for testing and controlled storage as well as a versatile laboratory environment for conducting test procedures

in the telecommunications, defence, aerospace, pharmaceutical, automotive, and electronics industries.

Walk-in chambers consist of a self-contained conditioning module and a room constructed from interlocking

panels or welded, insulated solid walls.


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7.2 SPECIFICATIONS

S.No. PART RATING/SPECIFICATION

1. CHAMBER SIZE 8m x 5m x 5m (L x W x H)

2. MAX. TEST OBJECT SIZE 3m x 2.5m x 2.5m

3. TEMPERATURE RANGE -10oC to +80oC

4. HUMIDITY RANGE 10% to 90% RH

5. SOLAR INTENSITY 300 to 1120 W/m

6. IRRADIATED AREA 3.2m x 2.4m

7. TEST PROFILES Desert Diurnal Cycle, Accelerated Cycle, andTailor Made Cycle


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CHAPTER- 8

TESTING OF PRODUCT AND ANALYZING ITS PARAMETERS


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CHAPTER- 9

OTHER TYPES OF CHAMBERS


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CONCLUSION


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BIBLIOGRAPHY

1.

Internet Sources

a. http://en.wikipedia.org/Resistance_thermometer

b.

http://en.wikipedia.org/Thermistor

c. http://en.wikipedia.org/Thermocouple

d. http://cmeipl.com/products.html

2.

Reference Books

a. Power System Instrumentation- Ramnath (Genius Publications)

b. Electrical and Electronics Measurements and Instrumentations- A. K. Sawhney
http://cmeipl.com/products.htmlhttp://cmeipl.com/products.html

training Report of climatic test chamber

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