Please use this identifier to cite or link to this item: https://doi.org/10.1109/ITHERM.2008.4544289
Title: Measurement of heat transfer coefficient in spray cooling of a flip chip
Authors: Tay, A.A.O. 
Somasundaram, S.
Issue Date: 2008
Citation: Tay, A.A.O., Somasundaram, S. (2008). Measurement of heat transfer coefficient in spray cooling of a flip chip. 2008 11th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, I-THERM : 341-345. ScholarBank@NUS Repository. https://doi.org/10.1109/ITHERM.2008.4544289
Abstract: With the relentless trend of increasing power and decreasing dimensions, thermal management of electronic packages is becoming a critical issue. Existing cooling techniques are fast becoming inadequate for the powerful electronic components expected in the near future. Researchers all over the world have been experimenting with advanced cooling techniques such as spray and impingement cooling using different liquids such as water and fluroinert fluids. This paper describes an experimental study of spray cooling of a flip chip where the heat transfer coefficient achieved by spray cooling is measured using a thermal transient method. The chip used is an 11 mm x 11 mm test chip containing resistors and diodes for heating of the chip and sensing the chip temperature, respectively. The test chip is mounted onto a printed circuit board (PCB) and water is sprayed onto the chip. Other components in the experimental set-up include a nozzle-pump assembly with essential valves and pressure gauges to regulate the flow as required. A state of the art thermal transient tester (T3ster) is used to measure the transient temperature of the test chip. The transient temperature data collected by T3ster is processed by software to give a plot of change in thermal capacitance versus change in thermal resistances. From this plot the thermal resistance at the surface of the chip due to spray cooling can be obtained and hence the heat transfer coefficient of the spray cooling system is determined. A parametric investigation has also been conducted and the parameters that are considered include chip to nozzle height(H), spraying pressure (P) and heat flux (F) in the chip. A high heat transfer coefficient of 28,500 W/m2K was obtained for H=60 mm, P=1 bar and F=53 W/cm2. It was found that the heat transfer coefficient increases dramatically with heat flux, probably due to increased evaporation rate. ©2008 IEEE.
Source Title: 2008 11th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, I-THERM
URI: http://scholarbank.nus.edu.sg/handle/10635/86015
ISBN: 9781424417018
DOI: 10.1109/ITHERM.2008.4544289
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

9
checked on Mar 12, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.