Thermal Management Research Studies. Volume 1. Electronics Cooling


Book Description

An innovative cooling concept called 'venturi flow cooling' has been introduced and developed for potential use in the thermal management of the advanced high power electronic devices. Single phase cooling medium is effectively used to create very high velocities in localized region of interest to improve heat transfer. Several different test apparatus have been built to investigate the heat transfer and flow phenomena. Using the venturi flow system and water, power devices, such as MCT and IGBT, were successfully tested at their rated current and frequency levels never possible with other cooling methods. Heat flux up to 257 W/(sq. cm) and heat transfer coefficient up to 13 W/(sq. cm). deg C were demonstrated in this cooling system. This cooling technique is highly recommended for the future electronic cooling applications of the emerging more electric airplane systems involving very high intensity localized heat dissipation devices. This report presents the detailed descriptions of all aspects of this project.







Electronics Cooling


Book Description

Featuring contributions from the renowned researchers and academicians in the field, this book covers key conventional and emerging cooling techniques and coolants for electronics cooling. It includes following thematic topics: - Cooling approaches and coolants - Boiling and phase change-based technologies - Heat pipes-based cooling - Microchannels cooling systems - Heat loop cooling technology - Nanofluids as coolants - Theoretical development for the junction temperature of package chips. This book is intended to be a reference source and guide to researchers, engineers, postgraduate students, and academicians in the fields of thermal management and cooling technologies as well as for people in the electronics and semiconductors industries.




Thermal Management Research for Power Generation. Delivery Order 0002 - Volume 1: Plain Fin Array Cooler for Electronics Cooling


Book Description

A fin array cooler was developed to cool a substrate of high-heat flux electronics. Plain copper fin strips were soldered onto the substrate to minimize the contact thermal resistance between the electronics and heat sink. Two new types of fin arrays based on offset fin strips and aligned fin strips were employed in order to mitigate the thermal stress problem found in the integral finned substrate concept. The cooler with different fin strip layouts was tested using polyalphaolefin as the coolant for flow Reynolds number variation from 53 to 482. The fin strip gaps of 0.13, 0.38, and 1.0 mm were experimented. Heat transfer data for different fin strip layouts were obtained under various operating conditions and compared. It was shown that, in general, the heat transfer coefficient was 29 to 36 percent higher for the offset fin strip layout than for the aligned fin strip layout. New heat transfer correlations for offset fin strip layout and aligned fin strip layout are presented.




Cooling Of Microelectronic And Nanoelectronic Equipment: Advances And Emerging Research


Book Description

To celebrate Professor Avi Bar-Cohen's 65th birthday, this unique volume is a collection of recent advances and emerging research from various luminaries and experts in the field. Cutting-edge technologies and research related to thermal management and thermal packaging of micro- and nanoelectronics are covered, including enhanced heat transfer, heat sinks, liquid cooling, phase change materials, synthetic jets, computational heat transfer, electronics reliability, 3D packaging, thermoelectrics, data centers, and solid state lighting.This book can be used by researchers and practitioners of thermal engineering to gain insight into next generation thermal packaging solutions. It is an excellent reference text for graduate-level courses in heat transfer and electronics packaging.




Qpedia Thermal Management – Electronics Cooling Book, Volume 3


Book Description

The complete editorial contents of Qpedia Thermal eMagazine, Volume 3, Issues 1 - 12 features in-depth, technical articles covering the most critical areas of electronics cooling.




Cooling of Electronic Systems


Book Description

Electronic technology is developing rapidly and, with it, the problems associated with the cooling of microelectronic equipment are becoming increasingly complex. So much so that it is necessary for experts in the fluid and thermal sciences to become involved with the cooling problem. Such thoughts as these led to an approach to leading specialists with a request to contribute to the present book. Cooling of Electronic Systems presents the technical progress achieved in the fundamentals of the thermal management of electronic systems and thermal strategies for the design of microelectronic equipment. The book starts with an introduction to the cooling of electronic systems, involving such topics as trends in computer system cooling, the cooling of high performance computers, thermal design of microelectronic components, natural and forced convection cooling, cooling by impinging air and liquid jets, thermal control systems for high speed computers, together with a detailed review of advances in manufacturing and assembly technology. Following this, practical methods for the determination of the parameters required for the thermal analysis of electronic systems and the accurate prediction of temperature in consumer electronics. Cooling of Electronic Systems is currently the most up-to-date book on the thermal management of electronic and microelectronic equipment, and the subject is presented by eminent scientists and experts in the field. Vital reading for all designers of modern, high-speed computers.




Thermal Management Research Studies. Volume 1: High Performance Miniature Heat Pipes


Book Description

High performance miniature heat pipes are developed for the cooling of high heat flux electronics using new capillary structures which rely on the use of a folded copper sheet fin and a folded copper screen. Using the folded sheet fin, capillary fins with fully opened grooves and folded sheet fins with notches at the fin top are made through a brazing process and the electric-discharge-machining technique. The use of the folded screen simplifies the heat pipe fabrication process. It is easy to make the capillary grooves as dense as desired through the present fabrication techniques. Heat pipes with different capillary structures and fill amounts are tested in the horizontal orientation. Three different heating areas in the heat pipe evaporator are arranged by activating different numbers of chip resistors. Thermal performances of the heat pipes are compared. The heat pipe with notched fins has the lowest internal thermal resistance at similar operating temperatures. In general, the heat pipes with notched fins, capillary fins and a folded screen demonstrated their favorable thermal performance. Compared with the capillary fins, the use of the folded sheet fins with notches resulted in a significant increase in the condenser heat transfer coefficient by 120 percent or greater at an operating temperature of 110 deg C. Heat fluxes higher than 140 W/sq cm are achieved using one-chip and two-chip heating modes.




Heat Transfer


Book Description

The continuing trend toward miniaturization and high power density electronics results in a growing interdependency between different fields of engineering. In particular, thermal management has become essential to the design and manufacturing of most electronic systems.Heat Transfer: Thermal Management of Electronics details how engineers can use




More Hot Air


Book Description

"Each case study, told as an anecdote, is designed to teach a basic concept of heat transfer, as applied to keeping electronics from overheating. Many people not trained in the basics of heat transfer have been roped into doing this job out of necessity. For those who lack any formal training in heat transfer, the case studies explode many of the myths about cooling electronics and replace these flawed practices with sound engineering, based on actual heat transfer theory. The case studies and humor in this book are also entertaining to those well versed in electronics cooling."--BOOK JACKET.