improving fcc expander reliability under off design conditions2

... fault-tolerant design, built-in testing, derating, design for damage detection, modular design, design for fault isolation, and maintenance-free design During design reviews, reliability and ... through design changes There are many strategies the designer could follow to improve design: Eliminate failure modes Focus design for fault tolerance Focus design for fail safe Focus design to ... increased the importance of reliability- based design The starting point for the reliability- based design is during the writing of the design specification In this phase, all reliability needs and specifications...

Ngày tải lên: 27/01/2014, 16:20

... at off- design condition is also very different from at design point As reported by Pedersen et al (2003), the smooth flow within the impeller at design point changed to a stalled flow at off- design ... to the tongue region for off- design conditions As the flow discharge from the impeller exit into volute casing, the highly distorted radial flow, either at design or off- design condition causing ... eddy simulation (LES) at design and off- design conditions At design load, the flow field inside the impeller is smooth and with no significant separation At quarter design load, a steady non-rotating...

Ngày tải lên: 10/09/2015, 08:27

... Proposed Solutions I Designing a 50-Period Communicative Syllabus for First Year Undergraduate Students at COT, VNU 1.1 Needs Analysis 1.2 Objectives of the Syllabus 1.3 Syllabus Design and Material ... A Brief Description of COT The College of Technology is an institution under Vietnam National University, Hanoi, offering undergraduate and postgraduate training programs in those fields as Information ... the level of proficiency in English for VNU's under- graduates and post-graduates The aim of the project is to standardize the English output of VNU's under- graduates and post-graduates at the level...

Ngày tải lên: 05/02/2014, 21:52

... 1.2.2 Design for Accidental Loads 1.2.3 Design for Fatigue 1.3 Structural Reliability Applications 1.3.1 Structural Reliability Concepts 1.3.2 Reliability- Based ... 26.2.5 Limit State Design (LSD) 26.2.6 Life Cycle Cost Design 26.3 Reliability- BasedDesign 26.3.1 General 26.3.2 Application of Reliability Methods ... marine structural design have been developed: Level 1: Design by rules Level 2: Design by analysis Level 3: Design based on performance standards Until the 1970’s, structural design rules had...

Ngày tải lên: 13/02/2014, 09:20

... changes requires enabling technology Technology includes designing in reliability, designing out maintenance, and implementation of productivity -improving information systems that make the remaining ... Introduction to Machinery Reliability Assessment, 2nd edition Reciprocating Compressors: Operation and Maintenance I Practical Machinery Management for Process Plants I Improving Machinery Reliability Heinz ... Couplings, 213; How to Keep Track of Reliability Review Tasks, 224; Machinery Reliability Audits for Existing Plants, 224; References, 238 V Maintenance and Benchmarking Reliability 242 Maintenance...

Ngày tải lên: 05/03/2014, 17:20

... site in the open conformation, undergo major structural rearrangements during this transition Notably, Tyr456 moves A (together with Ser455) to completely close off the active site from the internal ... Solutions were degassed by stirring under vacuum for 15 at room temperature immediately before measurements The solutions in the measuring cells were kept under pressure to prevent degassing ... that the replacement Kinetic stability (i.e the length of time an enzyme remains active before undergoing irreversible inactivation) [23] was measured for wild-type P2Ox and TmP2Ox variants at...

Ngày tải lên: 07/03/2014, 03:20

... entities with a role in improving the security and reliability of voting systems While we agree that EAC is one of many entities with responsibilities for improving the security and reliability of voting ... the security and reliability of these systems, and (3) describe actions taken or planned to improve their security and reliability While electronic voting systems hold promise for improving the ... Practices Address Electronic Voting Systems’ Security and Reliability National Initiatives Are Under Way to Improve Voting System Security and Reliability, but Key Activities Need to Be Completed...

Ngày tải lên: 23/03/2014, 03:20

... level within 10% of the mean Under mixed-hardwood canopies (Kostelnik et al., 1989 and Puckett, 1991), under a spruce-fir canopy (Lawrence and Fernandez, 1993) and under a Picea abies canopy (Seiler ... complementary studies aiming at a better understanding of processes at the ecosystem level The MEASUREMENT OF ATMOSPHERIC DEPOSITION UNDER FOREST CANOPIES 381 sampling design for throughfall and stemflow ... and fluxes under the canopy, but the poorer correlations between throughfall and incident precipitation obtained when chemical parameters were considered rendered this method inapplicable under the...

Ngày tải lên: 23/03/2014, 23:20

... test-retest reliability using electronic walkways while assessing gait in older people without performing a secondary task [911], the reliability of quantitative gait assessment under dual-task ... preclude performance of dual-tasking while gait assessment Reliability results are shown in Table Under single task conditions, re-test reliability was excellent with the ICCs for six gait variables ... reliability of gait assessment under single and dual-task conditions in older adults with MCI There is excellent reliability in both conditions over a one-week time span Reliability of gait assessment...

Ngày tải lên: 19/06/2014, 08:20

... selected and reliability calculated from a single measurement Intertester reliability compared the results of the first and second testers from the first session; additional intratester reliability ... interpreting ICC magnitudes: ICC < 0.4 represents poor reliability, 0.4 ≤ ICC ≤ 0.75 represents fair to good reliability, and ICC > 0.75 represents excellent reliability [26] Cronbach's alpha was calculated ... Table 3) except for the swing phase under single and dual task conditions (0.41, p = 0.006 and 0.54, p < 0.000, respectively) As for intratester reliability, foot -off time showed the highest and...

Ngày tải lên: 19/06/2014, 10:20

... changes requires enabling technology Technology includes designing in reliability, designing out maintenance, and implementation of productivity -improving information systems that make the remaining ... Introduction to Machinery Reliability Assessment, 2nd edition Reciprocating Compressors: Operation and Maintenance I Practical Machinery Management for Process Plants I Improving Machinery Reliability Heinz ... Couplings, 213; How to Keep Track of Reliability Review Tasks, 224; Machinery Reliability Audits for Existing Plants, 224; References, 238 V Maintenance and Benchmarking Reliability 242 Maintenance...

Ngày tải lên: 27/06/2014, 17:20

... changes requires enabling technology Technology includes designing in reliability, designing out maintenance, and implementation of productivity -improving information systems that make the remaining ... Introduction to Machinery Reliability Assessment, 2nd edition Reciprocating Compressors: Operation and Maintenance I Practical Machinery Management for Process Plants I Improving Machinery Reliability Heinz ... Couplings, 213; How to Keep Track of Reliability Review Tasks, 224; Machinery Reliability Audits for Existing Plants, 224; References, 238 V Maintenance and Benchmarking Reliability 242 Maintenance...

Ngày tải lên: 27/06/2014, 17:20

... calculation 230 reliability modelling 65 reliability of a component 47 reliability of a system 47 reliability prediction 44, 45, 68, 106, 110 reliability system-level 226 reliability theory 670 reliability ... dependency 311 reliability 5, 14, 35, 43 reliability analysis 12, 46, 654, 676 reliability application modelling 241 reliability assessment 44, 45, 69, 72, 86, 106, 133, 174, 560 reliability Bayesian ... reliability Bayesian evaluation 233 reliability block diagram (RBD) 466, 634, 635 parallel configuration 467 reliability checklist 422 reliability- critical item 134 Reliability Enhancement Methodology...

Ngày tải lên: 02/07/2014, 10:20

... ensure due diligence Design reviews are included at different phases of the engineering design process, such as conceptual design, preliminary or schematic design, and final detail design In most cases, ... engineering design integrity implies determining reliability, availability, maintainability and safety design criteria of the design s inherent systems and related equipment The tools that most design ... of Reliability, Availability, Maintainability and Safety in Engineering Design Rudolph Frederick Stapelberg Handbook of Reliability, Availability, Maintainability and Safety in Engineering Design...

Ngày tải lên: 02/07/2014, 10:20

... schematic block diagram 464 a Series reliability block diagram b Series reliability graph 467 a Parallel reliability block diagram b Parallel reliability graph 467 Process flow ... 675 Schema of a conceptual design space 679 Selecting design objects in the design knowledge base 682 Conceptual design solution of the layout of ... installation’s DCS 275 Design specification FMECA—drying tower 280 Design specification FMECA—hot gas feed 281 Design specification FMECA—reverse...

Ngày tải lên: 02/07/2014, 10:20

... evaluations Comprehensive design reviews are included at different phases of the engineering design process, such as conceptual design, preliminary or schematic design, and final detail design In most cases, ... engineering design integrity in design synthesis, which includes design for reliability, availability, maintainability and safety during the conceptual, schematic or preliminary, and detail design ... disaster” Designing for safety is inherent in the development of designing for reliability and maintainability of systems and their related equipment Environmental protection in engineering design, ...

Ngày tải lên: 02/07/2014, 10:20

... engineering design process, particularly where designs of large systems give rise to design complexity and consequent high risk of design integrity Contribution of research in integrity of engineering design ... engineering design because it omits the assessment of system reliability from preliminary design considerations, leaving the task of evaluating equipment reliability during detail design, when ... installations The intention of designing for reliability is thus to design integrated systems with assemblies that effectively fulfil all their required duties The design for reliability method thus...

Ngày tải lên: 02/07/2014, 10:20

... automated continual design reviews throughout the engineering design process on the basis of concurrent design in an integrated collaborative engineering design environment Engineering designs are composed ... result in superior designs Creating concurrent design systems for engineering designers requires knowledge of downstream activities to be infused into the design process so that designs can be generated ... of a number of design alternatives • Previous designs are frequently used during the design process • Design is an increasingly distributed and collaborative activity Engineering design is a complex...

Ngày tải lên: 02/07/2014, 10:20

... in the design process, in that they actually create or alter the design A design automation environment typically contains a design representation or design database through which the design ... uncertainty in multidisciplinary design optimisation (Batill et al 2000); B.S Dhillon in his fundamental research into reliability engineering in systems design and design reliability (Dhillon 1999a); ... design organisations; Degree of understanding of the design process of complex systems 2.2.2 Design Automation and Evaluation Design Automation Research work on design automation (DA) has concentrated...

Ngày tải lên: 02/07/2014, 10:20

... of reliability in engineering design Several techniques for determining reliability are categorised under three distinct definitions, namely reliability prediction, reliability assessment and reliability ... engineering design at different stages of the design process, particularly relating to the assessment of reliability in engineering design, or to the development of designing for reliability ... engineering design, such as conceptual design, preliminary or schematic design, and detail design The techniques for reliability prediction would be more appropriate during conceptual design, when...

Ngày tải lên: 02/07/2014, 10:20