PROJECT PAGE1 ABIN

Topics: Thermal management of electronic devices and systems, Convection, Fluid dynamics Pages: 10 (595 words) Published: December 27, 2014
ANALYSIS ON WATER COOLING OF ELECTRONIC HEAT SINK

A PROJECT REPORT
Submitted by
ABIN ELDHOSE (910413414001)

In partial fulfillment for the award of the degree
of
MASTER OF ENGINEERING
IN
THERMAL ENGINEERING

FATIMA MICHAEL COLLEGE OF ENGINEERING AND
TECHNOLOGY, MADURAI -20

ANNA UNIVERSITY : CHENNAI 600 025
DECEMBER 2014
i

ANNA UNIVERSITY : CHENNAI 600 025

BONAFIDE CERTIFICATE

Certified that this project report “ANALYSIS ON WATER COOLING OF ELECTRONIC HEAT SINK” is the bonafide work of “ABIN ELDHOSE” who carried out the project work under my supervision.

SIGNATURE

SIGNATURE

T.ANANTHANATESAN

Mr. JAIGURU

HEAD OF THE DEPARTMENT

SUPERVISOR

Professor & Head(PG)

Professor

Dep. of Thermal Engineering

Dep. of Thermal Engineering

FMCET

FMCET

Senkottai Village

Senkottai Village

Madurai – Sivagangai Main Road

Madurai – Sivagangai Main Road

Madurai - 625 020

Madurai - 625 020

ii

ABSTRACT

For more than a decade, investigations have been conducted to better understand the fluid flow and heat transfer characteristics in silicon-based microchannel heat sinks designed for applications in electronic cooling. These non-circular channels and silicon based microchannel heat sinks combine the attributes of high material compatibility, high surface area per unit volume ratios and large potential heat transfer performance with highly sophisticated and economic fabrication process. These

advantages

make

these

silicon

based

microchannel

heat

sinks

extremelyattractive for a wide variety of commercial applications. The present work addresses electronic chips cooling with forced convection of water in

silicon based

single microchannel heat sinks

by the help of

a

commercial CFD software FLUENT. The computational domain is discretized with non-uniform grids on the flow face but uniform grid along the flow. For single microchannel, the grid is generated by implementing Gambit software, which is incorporated with Cooper method for 3-dimensional grid generation. The pressure, velocity and temperature contours at inlet and outlet are presented along with the variation of these fields in flow direction for visual comparisons. The Nusselt number variation along the flow direction is presented and compared for three different flow rates. The convection heat transfer co-efficient is also presented for above three cases. The continuity, momentum and energy equations are solved in a segregated manner because of its accuracy. As the fluid flows in a microchannel, the laminar flow is considered during simulation along with the energy equation. The single microchannel solution is converged quickly with minimum number of iterations. The post processing of the output results are carried out by Excel.

iii

Table of Contents
ABSTRACT

iii

TABLE OF CONTENTS

iv

LIST OF FIGURES

vi

LIST OF SYMBOLS

vi

ABBREVIATIONS

vi

1. Introduction

1

1.1 General

2

1.2 New Thermal Design Requirements

5

1.3 Cooling Methods Used in Industry

5

1.3.1 Module Level Cooling

6

1.3.1.1 Internal Module Cooling

6

1.3.1.2 External Module Cooling

6

1.3.1.3 Immersion Cooling

7

1.3.2 System Level Cooling

7

1.3.2.1 Air Cooling

8

1.3.2.2 Hybrid Air-Water Cooling

8

1.3.2.3 Liquid-Cooling System

9

1.3.2.4 Refrigeration Cooled Systems

10

1.3.3 Data Center Thermal Management
1.4 Heat Sink

10
11

iv

1.5 Microchannel Heat Sink

11

1.5.1 Design Parameters

13

1.5.2 Heat Sink Material

13

1.5.3 The Number of Fins

13

1.5.4 Fin Shapes

14

1.5.5 Heat Transfer from Extended Surfaces (Fins)

14

1.6 Background of Theory

15

1.6.1 Slip flow

15

1.6.2 Knudsen number

15

1.6.3 Thermal accommodation coefficient

15

1.7 Objective of the Work

15

1.8 Organization of the Thesis
2 LiteratureReview

16
18

2.1...
Continue Reading

Please join StudyMode to read the full document

You May Also Find These Documents Helpful

  • project Essay
  • project Essay
  • project Essay
  • Page1 Essay
  • Project Pickings Essay
  • investigatory project Essay
  • Essay about Project Proposal
  • Project Essay

Become a StudyMode Member

Sign Up - It's Free