SEMINAR REPORT ON heat pipe

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SEMINAR REPORT ON
heat pipe
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CONTENTS

• INTRODUCTION.
• DESIGN CONSIDERATION.
• WORKING PRINCIPLE.
• SELECTIONED SIDE AND FRONT VIEW REPRESENTATION.
• TYPES OF HEAT PIPE.
• APPLICATIONS.
• ADVANTAGES AND DISADVANTAGES.
• CONCLUSION.

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INTRODUCTION

• A HEAT PIPE IS A DEVICE THAT CAN QUICKLY
  TRANSFER HEAT FROM ONE POINT TO ANOTHER.
• THEY ARE ALSO REFFERED TO AS THE
  SUPERCONDUCTORS OF HEAT AS THEY POSSESS AN
  EXTRA ORDINARY HEAT TANSFER CAPACITY AND WITH
  ALMOST NO HEAT LOSS

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DSIGN CONSIDERATION

• THREE BASIC COMPONENTS OF A HEAT PIPE ARE
• CONTANR
• WORKING FLUID
• WICK OR CAPILLARY STRUCTURE

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BASIC COMPONENTS

• (1)CONTAINER THE FUNCTION OF THE CONTAINER IS
  TO ISOLATE THE WORKING FLUID FROM OUTSIDE
  ENVIRONMENT.
• SELECTION OF CONTAINER MATERIAL DEPENDS ON
  FACTOR ARE
• (A) COMATIBILITY
• (B) ST RENGTH TO WEIGHT RATIO
• (C) THERMAL CONDUCTIVITY
• (D) POROSITY

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• (2) Working fluid
• A fast consideration in the identification
  of a suitable working fluid is the operating
  vapour temperature range
• good thermal stability
• high latent heat
• high thermal conductivity
• low liquid and vapor viscosities
• high surface tension

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WICK OR CAPILLARY STRUCTURE

• It is a porous structure made of materials
  like steel, alumunium, nickel or copper in
  various ranges of pore sizes. They are fabricated
  using metal foams, and more particularly felts,
  the latter being more frequently used.

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WORKING PRINCIPLE.

• One end of the tube is heated and the other
  is cooled. The heat source (the evaporator)
  causes the fluid to boil and turn to vapor .When
  that happens, the liquid picks up the latent heat
  of vaporization. The gas, which then has a higher
  pressure, moves inside the sealed container to a
  colder location where it condenses. Once the
  vapor reaches the cold end of the tube (the
  condenser), the fluid changes phase again from
  vapor back to a liquid.

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