Sn-2Ag-3Bi-xInはんだの融点,ドロス,酸化特性に与えるインジウム含有量の効果

Hydrothermal performance of microchannel heat sink: The effect of channel design

The strategy for design of new nanometals was developed due to their wide applications in many fields. One of the most important nanometals is silver nanoparticles (AgNPs) because of their extensive applications in biotechnology and biomedical fields. AgNPs were usually synthesized by using chemical and physical methods. In the chemical methods, various toxic chemicals are used, which are harmful to the health of living organisms. Therefore, the AgNPs were synthesized by using biological methods based on green chemistry for reducing the toxic chemicals. There are various resources for green synthesis of AgNPs, such as bacteria, fungi, enzyme and plant extracts. The green synthesis of AgNPs involves three main steps: the selection of the solvent medium, the selection of environmentally reducing agents, and the selection of non-toxic substances for the stability of AgNPs. The biosynthesis of AgNPs using plant extracts is more favorable than other biological methods because of removing the elaborate process of maintaining cell cultures. It can be also suitably scaled up for large scale production of AgNPs. This review focuses on green synthesis of AgNPs using various plant extracts.

https://www.cheric.org/PDF/KJChE/KC31/KC31-4-0548.pdf

Green synthesis of silver nanoparticles using plant extracts

With the increase in electronic traffic, heat generated by electronic equipment, and the concomitant costs of powering cooling systems in electronic data centers are increasing continually. Various research groups working in academic institutions, research laboratories and industries have been applying a variety of tools to study and improve performance of data centers. This paper reviews recent contributions to the state of knowledge in data center thermal management. First, we review numerical and experimental studies on the most common air-cooled raised floor plenum type data centers. We then summarize published research on rack layout, efficiency and performance metrics for data centers, dynamic control and life cycle analyses, and validation of numerical models. Finally, we review some recently proposed cooling strategies and numerical optimization efforts. We find that the research carried out on thermal management of data centers has helped improve performance in many instances (such as rear door water cooled heat exchanger type rack), and has helped establish some physics-based criteria for data center designers. Based on the trends observed in this review, we expect further improvements to all aspects of data center design and operation in the near future, with a focus on real-time measurement & control, model validation and heuristics based optimization. In addition, some significant changes such as thermal energy storage and smart-grid capabilities are also expected to be incorporated into data center control strategies.

Advances in data center thermal management

Summary
Topology optimization has been widely studied and implemented as a powerful conceptual design tool in various engineering applications. However, the result from topology optimization has posed an implementation challenge to engineers because of the complexity of converting obtained solution into computer-aided design data and then fabricating it into real parts. Over the past few years, the advanced additive manufacturing technology with new materials and higher resolution output capabilities has opened numerous opportunities to fill the gap between topology optimization and product application. In this study, an engineering procedure is presented for the conversion of topology optimization result to ready-to-print model for additive manufacturing. The steps of post-optimization handling are outlined, and the potential practical issues for the additive manufacturing implementation are discussed. A vehicle example for full frontal impact load path development by topology optimization with inertia relief approach is used to exhibit the employed additive manufacturing implementation process with a reduced-scale part build. The arising implementation issues and needs are examined for future advance of topology optimization and additive manufacturing integration development. Copyright © 2017 John Wiley & Sons, Ltd.

Sn-2Ag-3Bi-xInはんだの融点,ドロス,酸化特性に与えるインジウム含有量の効果

Citations

Hydrothermal performance of microchannel heat sink: The effect of channel design

Green synthesis of silver nanoparticles using plant extracts

Advances in data center thermal management

Topology optimization with additive manufacturing consideration for vehicle load path development

Compact thermal modeling methodology for predicting skin temperature of passively cooled devices