Final Hp Ppt

7/31/2019 Final Hp Ppt

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ABSTRACT

PROBLEM:Heat is major problem,generates impulsive and extensive inconveniencein mechanical system and effects its efficiency.

SOLUTION:A heat pipe is a beautiful solution for above problem.

WORKING OF HEAT PIPE: Heat pipe works on the principle of both thermalconductivity and phase transition to efficiently manage the heat transfer between

two solid interface.ADVANTAGES AND LIMITATIONS :Requires low maintenance,

Efficiency is high,Better conductors, and They must be tuned to particular coolingconditions,Vaporization of working fluid.

APPLICATIONS:Heat pipes are used in different fields of engineering.

EX:In cpus for cooling of chips,In solar heaters,In heat exchangersetc

CONCLUSION:so,using heat pipes we can reduce the above problem.

ppt by,

T.kiran kumar.


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CONTENTS

.A MAJOR PROBLEM

.A BEAUTIFUL SOLUTION

.HEAT PIPE

.WORKING

.TYPES OF HEAT PIPES

.ADVANTAGES ,LIMITATIONS AND

APPLICATIONS.


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WHAT IS HEAT TRANFER ?

HEAT TRANSFER

Heat transfer is a discipline of thermalengineering that concerns with thegenerations,use, conversion and exchange ofthermal energy and heat between physicalsystems.

Different modes of heat transfer1.conduction2.convection3.thermal radiations.


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WHAT IS THE MAJOR PROBLEM?

Heat is major problem,generates impulsiveand extensive inconvenience in mechanicalsystem.

Heat generated if not transfer will causemechanical problems,resulting in losing theaccuracy of your machine which will finally end

up in crap. Heat generated produces intense pressure

mechanical distortion,and more frictionalproblems .


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The beautiful solution

A heat pipe or heat pin is heattransfer device that combines the

principle of both thermal conductivityand phase transition to efficientlymanage the heat transfer between

two solid interfaces.


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HEAT PIPEFor a MAJOR PROBLEM

A BEAUTIFUL SOLUTION


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Construction,design and working


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Different construction possible inheat pipes

Flat heat pipes Loop heat pipes


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Advantages of heat pipes

Requires low maintenance.

Efficiency is high.

They are better conductors. They can be used as thermal diode's.

Wide range of heat fluxes and temperature

can be attained in single design. Can be concluded for various dimension's.

Only criteria is the working temperature .


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Limitations of heat pipes

They must be tuned to particular coolingconditions.

Vaporization of working fluid.

Below certain temperature phase change doesnot happen.

Most manufacture cannot make a traditionalheat pipe of less than 3 mm diameter(due to material limitations).

A li i


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Applications Used in nuclear power plants.

Applicable in space craft technology forextreme thermal conditions.

Used in computer systemstransfer of heat from cpu's to environment.

Solar heaters.

Pipelines over permafrost.(trans-Alaska pipeline system)

Cooking roasted food.(transfer of large volume of heat for lowtemperature)

ventilation heat recovery systems.


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SPECIAL APPLICATION INMECHANICAL ENGINEERING

Temperature Range:Heat Pipes are available in two temperatureranges.

For Injection Moulds: Heat Pipes havingtemperature range from +5 deg. C to + 200deg. C. The main applicationof these types of Heat Pipes are in Injection

Moulding, Compression / Transfer Mouldingand Rotation Moulding,Spiral Screws.


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For Die-Casting Dies: Heat Pipes havingtemperature range from +5 deg. C to + 350 deg. C.

The main applicationof these types of Heat Pipes are in Die-Casting,Spiral Screws in plastic moulding.

It is advisable to order the Heat Pipes suitable tothe applications temperature range. If the HeatPipe gets heated above its operating temperature,it releases a small amount of non-toxic gas andbecomes inoperative.Material of construction: Copper / StainlessSteel

HEAT PIPES IN


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HEAT PIPES INHEAT EXCHANGERS

AIR TO AIR HEATPIPE HEATEXCHANGER

.Typical finned air to air Heat Pipe heatexchangers comprise of number of tubulargravity assisted finned Heat Pipes

arranged in staggered pitch, depending upon theapplication. One of the advantages of the HeatPipe Heat Exchangeris its ability to operate without cross

contamination between the two gas streams.

..Use of Gravity Assisted Heat Pipe compliesorientation evaporator above condenser for the

Heat Pipe Heat Exchanger.


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AIR TO WATER HEATPIPEHEAT EXCHANGER

This heat exchanger resembles Air to Air unit,only difference is liquid/water tank is providedat the condensation

section to preheat liquid/water.


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Thank you

APresentationBy

T.Kiran kumar

Documents

Final Hp Ppt