The Effect of Corrosion on the Shipboard Performance of EMI/EMP Ground Adapters: Original and Improved Design Concepts

CORROSION ◽  
1992 ◽  
Vol 48 (1) ◽  
pp. 68-78
Author(s):  
D. S. Dixon
Keyword(s):  
Design Concepts ◽  
Improved Design

Novel zwitterionic Polymer Binder with Enhanced Ionic Conductivity for Water-processable LiFePO4 Cathodes

2021 ◽  
Author(s):  
Shu Huang ◽  
Xiaoting Huang ◽  
Xiaokai Li ◽  
Youyuan Huang ◽  
Xueqin He ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Polymer Binder ◽  
Design Concepts ◽  
Zwitterionic Polymer ◽  
Improved Design ◽  
Olivine Structure

Current olivine structure LiFePO4 possesses poor conductivity, which makes it unsuitable for unparalleled battery applications. This issue can be solved by improved design concepts of binder systems. Herein, an original...

Field Test of the W501D, a 100 MW Combustion Turbine

1983 ◽  
Author(s):  
A. J. Scalzo ◽  
G. S. Howard ◽  
P. C. Holden
Keyword(s):  
Combustion Chamber ◽  
Field Test ◽  
Test Data ◽  
Low Temperatures ◽  
Design Concepts ◽  
Turbine Vane ◽  
Current Production ◽  
Critical Components ◽  
Improved Design

The field test of the current production W501D combustion turbine shows the engine to be an outstanding success. The engine meets power and exceeds efficiency expectations. Metal temperatures are at or below expected levels throughout the engine. In particular the test data demonstrates low temperatures provided by improved design concepts for the combustion chamber and first stage turbine vane, which are critical components because of their severe environment. Other design improvements for performance and reliability were also verified during the test.

Design Improvement Studies for Future SFR

2014 ◽  
Author(s):  
Rajan Babu V. ◽  
V. Balasubramaniyan ◽  
Raghupathy Sundararajan ◽  
P. Puthiyavinayagam ◽  
Chellapandi Perumal
Keyword(s):  
Heat Transport ◽  
Technology Development ◽  
Heat Removal ◽  
Fast Breeder Reactor ◽  
Construction Time ◽  
Design Concepts ◽  
Fuel Storage ◽  
Reactor Assembly ◽  
Critical Components ◽  
Improved Design

Prototype Fast Breeder Reactor (PFBR), a 500 MWe, (U-Pu)O2 fuelled, sodium cooled, pool type fast reactor, is in advanced stage of construction at Kalpakkam, India. Based on the experience gained during the design, manufacture and erection of various reactor components of PFBR, it is planned to construct Sodium cooled Fast Reactors (SFR) by adopting twin unit (2×500 MWe reactors) concept. The future Fast Breeder Reactor (FBR) – 1 & 2 have three main heat transport circuits, namely primary sodium, secondary sodium and steam-water systems. All the reactor internals including core and primary heat transport circuit systems are contained in a single vessel called main vessel and it is closed with top shield. Reactor assembly forms the heart of the Nuclear Steam Supply System. A detailed and exhaustive design / optimisation exercise was initiated towards improving the economic competitiveness and enhancing the safety of future FBRs. It is observed that the overall dimensions of the reactor assembly contribute immensely to the capital cost. In this context, detailed studies were carried out towards optimizing the overall dimensions of the reactor assembly. Further, the reactor assembly design in particular has been engineered to favour manufacture of integrated assembly and erection of the same, as a single unit, in reactor vault to reduce construction time. Various activities undertaken towards technology development of critical components have enhanced the confidence level in the improved design concepts and reducing time for manufacture and erection. In addition to the reactor assembly, specific improvements have been made in decay heat removal systems and sodium purification system. The layout incorporates a twin unit concept in which the ex-vessel fuel handling system and fuel storage building are shared. This paper discusses the basis for undertaking the review exercise and experience gained during construction of PFBR and highlights the design studies and technology development carried out for future SFR.

A Systematic Method for Design Prototyping

2015 ◽  
Vol 137 (8) ◽  
Author(s):  
Bradley Camburn ◽  
Brock Dunlap ◽  
Tanmay Gurjar ◽  
Christopher Hamon ◽  
Matthew Green ◽  
...  
Keyword(s):  
Best Practices ◽  
Systematic Approach ◽  
Design Research ◽  
Ad Hoc ◽  
Performance Outcomes ◽  
Scientific Evaluation ◽  
Design Problems ◽  
Design Concepts ◽  
Virtual Prototypes ◽  
Improved Design

Scientific evaluation of prototyping practices is an emerging field in design research. Prototyping is critical to the success of product development efforts, and yet its implementation in practice is often guided by ad hoc experience. To address this need, we seek to advance the study and development of prototyping principles, techniques, and tools. A method to repeatedly enhance the outcome of prototyping efforts is reported in this paper. The research methodology to develop this method is as follows: (1) systematically identify practices that improve prototyping; (2) synthesize these practices to form a guiding method for designers; and (3) validate that the proposed method encourages best practices and improves performance. Prototyping practices are represented as six key heuristics to guide a designer in planning: how many iterations to pursue, how many unique design concepts to explore in parallel, as well as the use of scaled prototypes, isolated subsystem prototypes, relaxed requirements, and virtual prototypes. The method is correlated, through experimental investigation, with increased application of these best practices and improved design performance outcomes. These observations hold across various design problems studied. This method is novel in providing a systematic approach to prototyping.

scholarly journals Hydrodynamic performance of a hybrid anaerobic baffled reactor (HABR): effects of number of chambers, hydraulic retention time, and influent temperature

2018 ◽  
Vol 78 (4) ◽  
pp. 968-981 ◽  
Author(s):  
Md Khalekuzzaman ◽  
Mehedi Hasan ◽  
Rezaul Haque ◽  
Muhammed Alamgir
Keyword(s):  
Retention Time ◽  
Hydraulic Retention Time ◽  
Interactive Effects ◽  
Hydrodynamic Performance ◽  
Reactor Performance ◽  
Anaerobic Baffled Reactor ◽  
Design Concepts ◽  
Operating Variables ◽  
Hydrodynamic Behaviour ◽  
Improved Design

Abstract Hydrodynamic performance of a biological reactor is an important design concern since it directly affects the treatment efficiency. In this research, a hybrid anaerobic baffled reactor (HABR) was proposed with improved design concepts and principles. The HABR consisted of a front sedimentation chamber, four regular baffled chambers followed by two floated filter media chambers. The effects of operating variables 5–20 hr hydraulic retention time (HRT) and 10–40 °C of influent temperature, as well as their interactive effects, on the hydrodynamic behaviour were investigated by residence time distributions study and response surface methodology. The study suggests that the hydrodynamic performance is greatly influenced by the number of chambers in the reactor rather than HRT and influent temperature. The influence of HRT and feed temperature were mainly observed on the front chambers (1–4) rather than rear chambers (5–7). The optimum reactor performance – low dead space (<10%), excellent hydraulic efficiency (>0.75), and intermediate mixing pattern (Peclet number > 10) – were achieved using the proposed HABR with more than five chambers.

An improved design for an Scanning Tunnelling Microscope (STM) for use in a Transmission Electron Microscope (TEM)

1991 ◽  
Vol 49 ◽  
pp. 384-385
Author(s):  
W.K. Lo ◽  
J.C.H. Spence
Keyword(s):  
Electron Microscope ◽  
Transmission Electron Microscope ◽  
Mechanical Stability ◽  
Scanning Tunnelling Microscope ◽  
Reflection Mode ◽  
Specimen Holder ◽  
Transmission Electron ◽  
Scanning Tunnelling ◽  
Improved Design

An improved design for a combination Scanning Tunnelling Microscope/TEM specimen holder is presented. It is based on earlier versions which have been used to test the usefulness of such a device. As with the earlier versions, this holder is meant to replace the standard double-tilt specimen holder of an unmodified Philips 400T TEM. It allows the sample to be imaged simultaneously by both the STM and the TEM when the TEM is operated in the reflection mode (see figure 1).The resolution of a STM is determined by its tip radii as well as its stability. This places strict limitations on the mechanical stability of the tip with respect to the sample. In this STM the piezoelectric tube scanner is rigidly mounted inside the endcap of the STM holder. The tip coarse approach to the sample (z-direction) is provided by an Inchworm which is located outside the TEM vacuum.

High resolution at low voltage: A new approach

1989 ◽  
Vol 47 ◽  
pp. 76-77
Author(s):  
Arthur V. Jones
Keyword(s):  
Low Voltage ◽  
Emission Sources ◽  
New Approach ◽  
Design Concepts ◽  
Probe Diameter ◽  
Low Voltage Operation ◽  
Sufficient Intensity ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes ◽  
Immersion Type

With the introduction of field-emission sources and “immersion-type” objective lenses, the resolution obtainable with modern scanning electron microscopes is approaching that obtainable in STEM and TEM-but only with specific types of specimens. Bulk specimens still suffer from the restrictions imposed by internal scattering and the need to be conducting. Advances in coating techniques have largely overcome these problems but for a sizeable body of specimens, the restrictions imposed by coating are unacceptable.For such specimens, low voltage operation, with its low beam penetration and freedom from charging artifacts, is the method of choice.Unfortunately the technical dificulties in producing an electron beam sufficiently small and of sufficient intensity are considerably greater at low beam energies — so much so that a radical reevaluation of convential design concepts is needed.The probe diameter is usually given by

Experience Design Applied to Research

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Andrea CAPRA ◽  
Ana BERGER ◽  
Daniela SZABLUK ◽  
Manuela OLIVEIRA
Keyword(s):  
Information Technology ◽  
Product Development ◽  
Design Process ◽  
Development Process ◽  
Product Development Process ◽  
Experience Design ◽  
Low Resolution ◽  
Design Concepts ◽  
Innovative Products ◽  
Technological Products

An accurate understanding of users' needs is essential for the development of innovative products. This article presents an exploratory method of user centered research in the context of the design process of technological products, conceived from the demands of a large information technology company. The method is oriented - but not restricted - to the initial stages of the product development process, and uses low-resolution prototypes and simulations of interactions, allowing users to imagine themselves in a future context through fictitious environments and scenarios in the ambit of ideation. The method is effective in identifying the requirements of the experience related to the product’s usage and allows rapid iteration on existing assumptions and greater exploration of design concepts that emerge throughout the investigation.

Optimization of Process Parameters in Stir Casting of Hybrid Metal Matrix (LM25/SiC/B4C) Composite Using Taguchi Method

2017 ◽  
Vol 13 (9) ◽  
pp. 6475-6479
Author(s):  
M. Arulraj ◽  
P.K. Palani ◽  
L. Venkatesh
Keyword(s):  
Taguchi Method ◽  
Matrix Material ◽  
Base Material ◽  
Stir Casting ◽  
Aluminium Matrix ◽  
Matrix Composites ◽  
Design Concepts ◽  
Specific Strength ◽  
Optimization Of Process Parameters ◽  
Reinforcement Material

Aluminium based composites exhibit many attractive material properties such as increased stiffness, wear resistance, specific strength and vibration damping and decreased co-efficient of thermal expansion compared with the conventional aluminium alloys. Aluminium Matrix Composites consist of non-metallic reinforcement which offers advantageous properties over base material. Reinforcements like SiC, B4C and Al2O3 are normally preferred to improve the mechanical properties. Here Aluminum LM25 is selected as matrix material while Silicon carbide and Boron carbide are selected as reinforcement material. The fabrication of aluminium matrix was done by stir casting method. In the present study an attempt has been made to investigate the effect of three major stir casting parameters (stir speed, stir duration and preheated temperature of reinforcement material) on stir casting of Aluminium LM25 - SiC - B4C composite. Experiments were conducted based on Taguchi methodology. Taguchi quality design concepts of L9 orthogonal array has been used to determine S/N ratio and through S/N ratio a set of optimum stir casting parameters were obtained. The experimental results confirmed the validity of Taguchi method for enhancing tensile strength of castings. 

The structure improved design of rod load reducer in Tahe oil field

2013 ◽  
Author(s):  
Zhiqiang Huang ◽  
Liyan Liu ◽  
Qin Li ◽  
Chengsong Qiu ◽  
Yachao Ma
Keyword(s):  
Oil Field ◽  
Improved Design ◽  
Tahe Oil Field
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