Modeling, Fabrication, and Testing of Micro Heat Pipes: An Update

1996 ◽  
Vol 49 (10S) ◽  
pp. S175-S183 ◽  
Author(s):  
G. P. Peterson
Keyword(s):  
Flat Plate ◽  
Recent Work ◽  
Analytical Techniques ◽  
Heat Pipes ◽  
Test Results ◽  
Operating Characteristics ◽  
Current Test ◽  
The Status ◽  
Micro Heat Pipes ◽  
Made In

In 1992, an overview was presented which summarized the status and progress made in the development of very small, “micro” heat pipes, manufactured as stand alone devices or fabricated as an integral part of silicon wafers. Since that initial review, significant advances have been made in the analysis, fabrication and testing of these devices, for use in a wide variety of applications. Following, is a review of the more recent work in this rapidly emerging field. Included is a summary of the analytical techniques developed, the various proposed methods of fabrication, and a summary of the most current test results achieved to date. Because the fundamental operating characteristics of micro heat pipes larger than 1 mm in diameter are similar to that of conventional heat pipes, this review focuses on the analysis, fabrication, and testing of micro heat pipes with characteristic dimensions of less than 500 μm. Particular emphasis is placed on research, related to the development of arrays of micro heat pipes and flat plate micro heat pipes fabricated as an integral part of semiconductor devices.

Experimental Investigation of a New Flat Plate Solar Heat Collector by Micro Heat Pipe Array

2010 ◽  
Author(s):  
Yao-Hua Zhao ◽  
Fei-Long Zou ◽  
Yan-Hua Diao ◽  
Zhen-Hua Quan
Keyword(s):  
Flat Plate ◽  
Heat Pipe ◽  
High Efficiency ◽  
Heat Pipes ◽  
Total Heat Loss ◽  
Solar Heat ◽  
Solar Water ◽  
Micro Heat Pipe ◽  
Heat Collector ◽  
Micro Heat Pipes

The performance of a new flat plate solar heat collector with perfect combination of high efficiency and low cost is investigated experimentally. The new system described in this study uses a novel micro heat pipe array as a key component for the system. One such flat plate heat collector contains over 300 micro heat pipes per 1m2 and the hydraulic diameter of the micro heat pipes is 0.4–1.0mm. A detailed heat transfer experimental study is conducted during daylight hours over several months, focusing on the collector efficiency and overall efficiency of the system as well as total heat loss factor. The results show that the collector’s maximum instantaneous efficiency is up to 88%. Compared with conventional evacuated glass tube solar water heater, the system offers the additional benefits of high pressure resistance, low weight, good reliability and durability, easy integration into buildings and absence of freezing during winter months. Besides, compared with traditional flat-plate solar water system which is mainly sheet-and-tube concept, the system also shows many advantages: higher efficiency, much cheaper, absence of tube-bonding and freezing etc. Therefore, the system proposes a unique substitute to common solar water heating systems.

a Taskboard System Based On Website (Case Study: CV Nukegraphic Indonesia)

Tech-E ◽  
2018 ◽  
Vol 1 (2) ◽  
pp. 10
Author(s):  
Ceng Giap Yo ◽  
Dennie
Keyword(s):  
Information Technology ◽  
Test Results ◽  
Work Process ◽  
Web Based ◽  
Task List ◽  
The Status ◽  
Short Time ◽  
A Company ◽  
Made In

CV. Nukegraphic Indonesia as one of the fast growing website in Indonesia would require a lot of support, including support in the field of Information Technology. Recording task list that still use manual systems, often prevent the processing of information about the details of the status of the task and the status of projects ongoing or already completed in the form of a percentage of each project, as well as recording task that still use paper media is also considered only will lead to waste in paper usage. Recording task that is only made in the scope of the company's staff also hinder the work process of the company when staff are outside the company. The method used in the manufacture of a web-based application taskboard this form of collecting data through observation and questionnaires were distributed in the scope of the company. The test results of these applications concluded that with the application taskboard-based website is an account executive can find out information about the details of the status and the status of the project in a short time, because the data processing has been made into a computerized provided through the application, both an account executive and members are also more easy in knowing the task that must be done even though it is outside the company. With this application is expected to help the performance of employees in a company to be more productive

Steady-State Modeling and Testing of a Micro Heat Pipe

1990 ◽  
Vol 112 (3) ◽  
pp. 595-601 ◽  
Author(s):  
B. R. Babin ◽  
G. P. Peterson ◽  
D. Wu
Keyword(s):  
Steady State ◽  
Heat Pipe ◽  
Heat Pipes ◽  
Experimental Results ◽  
State Model ◽  
Operating Characteristics ◽  
Maximum Heat ◽  
Micro Heat Pipe ◽  
Steady State Model ◽  
Micro Heat Pipes

A combined experimental and analytical investigation was conducted to identify and understand better the phenomena that govern the performance limitations and operating characteristics of micro heat pipes—heat pipes so small that the mean curvature of the vapor—liquid interface is comparable in magnitude to the reciprocal of the hydraulic radius of the flow channel. The analytical portion of the investigation began with the development of a steady-state model in which the effects of the extremely small characteristic dimensions on the conventional steady-state heat pipe modeling techniques were examined. In the experimental portion of the investigation, two micro heat pipes, one copper and one silver, 1 mm2 in cross-sectional area and 57 mm in length, were evaluated experimentally to determine the accuracy of the steady-state model and to provide verification of the micro heat pipe concept. Tests were conducted in a vacuum environment to eliminate conduction and convection losses. The steady-state experimental results obtained were compared with the analytical model and were found to predict accurately the experimentally determined maximum heat transport capacity for an operating temperature range of 40° C to 60° C. A detailed description of the methodology used in the development of the steady-state model along with a comparison of the predicted and experimental results are presented.

Micro Heat Pipes for Stacked 3D Microelectronic Modules

2003 ◽  
Author(s):  
Sameer Khandekar ◽  
Manfred Groll ◽  
Vivak Luckchoura ◽  
Walter Findl ◽  
Jun Zhuang
Keyword(s):  
Flat Plate ◽  
Heat Pipes ◽  
Matrix Composites ◽  
Liquid Cooling ◽  
Plate Heat ◽  
Final Design ◽  
Potential Applications ◽  
And Performance ◽  
3D Package ◽  
Micro Heat Pipes

In context of a European Commission funded project, development of a standardized multifunctional stacked 3D package was envisioned for potential applications in aviation, space and telecommunication sectors. The standardization and modularity was aimed to integrate packages from different technologies and to allow mutual slice inter-changeability. Thermal management solutions to the proposed new stacked 3D package as per the project specifications (a total of three stacked substrate slices, each slice of size 55 × 55 × 1 mm3 and total package height not exceeding 10.5 mm) are reported here. Three potential options were studied i.e. (a) module liquid cooling, (b) integration of miniature copper-water cylindrical heat pipes (OD 3.0 mm) with the 1.0 mm substrate slice and (c) development of flat plate heat pipes of 0.9 mm thickness. For options (a) and (b), initial tests have been performed taking aluminum as a representative material for AlSiC metal matrix composites which were to be employed in the final design. Further, copper based flat plate micro-structure conventional heat pipes have been developed and performance tested. Thermal interactions have been investigated with thermocouples coupled with infrared thermography. For safe operation up to 30W heating power (10W/slice), while thermal diffusion through the bare metallic substrate is sufficient for heat transfer from chip to the substrate, micro heat pipes should be employed to cool the substrate and transfer heat from it to an external cold plate. Flat plate heat pipes are advantageous for higher power levels per slice. Interlayer thermal interactions also affect the response of stacked 3D packages.

FLAT PLATE PULSATING HEAT PIPES WITH DIFFERENT CHANNEL GEOMETRIES FOR HIGH HEAT FLUX APPLICATIONS

2020 ◽  
Author(s):  
Larissa Krambeck ◽  
Kelvin Guessi Domiciano ◽  
Luis Alonso Betancur Arboleda ◽  
Marcia Mantelli
Keyword(s):  
Heat Flux ◽  
Flat Plate ◽  
Heat Pipes ◽  
High Heat ◽  
High Heat Flux

ЦИФРОВОЙ ИЗОЛЯТОР В СПЕЦИАЛИЗИРОВАННОМ КОРПУСЕ, ВЫПОЛНЕННОМ ПО ТЕХНОЛОГИИ LTCC

2020 ◽  
Vol 96 (3s) ◽  
pp. 392-395
Author(s):  
В.А. Бутузов ◽  
А.Е. Назаренко ◽  
Н.Ю. Дмитриев ◽  
В.А. Трофимов ◽  
В.А. Косевский ◽  
...  
Keyword(s):  
Low Temperature ◽  
Data Rate ◽  
Test Results ◽  
Made In

Представлены результаты разработки цифрового изолятора на основе интегрального микротрансформатора в специализированном корпусе, выполненном по технологии низкотемпературной совместно обжигаемой керамики (LTCC). Согласно результатам измерений тестовых образцов максимальная скорость передачи данных разработанного цифрового изолятора - не менее 30 Мбит/с. The paper presents the results of the development of a digital insulator based on an integral microtransformer in a specialized package made in technology of low-temperature co-fired ceramics. The isolator is a microassembly consisting of a transceiver chip and an integrated transformer. According to the test results, the maximum data rate speed of the developed digital insulator is not less than 30 Mbit/s.

Against Permanent Sovereignty

2017 ◽  
Author(s):  
Chris Armstrong
Keyword(s):  
Natural Resources ◽  
International Politics ◽  
Local Communities ◽  
Status Quo ◽  
Nation States ◽  
The Status ◽  
Made In

The status quo within international politics is that individual nation-states enjoy extensive and for the most part exclusive rights over the resources falling within their borders. Egalitarians have often assumed that such a situation cannot be defended, but perhaps some sophisticated defences of state or national rights over natural resources which have been made in recent years prove otherwise. This chapter critically assesses these various arguments, and shows that they are not sufficient to justify the institution of ‘permanent sovereignty’ over resources. Even insofar as those arguments have some weight, they are compatible with a significant dispersal of resource rights away from individual nation-states, both downwards towards local communities, and upwards towards transnational and global agencies.

Three-dimensional heat transfer analysis of flat-plate oscillating heat pipes

2021 ◽  
pp. 117189
Author(s):  
Kimihide Odagiri ◽  
Kieran Wolk ◽  
Stefano Cappucci ◽  
Stefano Morellina ◽  
Scott Roberts ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Flat Plate ◽  
Three Dimensional ◽  
Heat Pipes ◽  
Heat Transfer Analysis
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