scholarly journals TECHNOLOGY OF UNIQUE BUILDINGS’ CONSTRUCTION IN THE CONSTRAINED CONDITIONS OF OPERATING ENTERPRISE

2018 ◽  
Vol 15 (5) ◽  
pp. 726-741
Author(s):  
A. F. Andryushenkov ◽  
N. S. Volovnik ◽  
A. A. Andryushenkov
Keyword(s):  
Oil Refining ◽  
Design Solution ◽  
Construction Technology ◽  
Design Development ◽  
Economic Criterion ◽  
Detailed Consideration ◽  
Mixed Scheme ◽  
Rational Version ◽  
Constrained Conditions ◽  
The Given

Introduction.There is a need for detailed consideration of technological solutions of the constructed object while the process of the work projects’ development (WPD). The features of WPD development are considered on the basis of the flare tower as a part of the flare installation of the oil refining enterprise. The problems of organizational and technological design (development of WPD) for such facilities’ type should be solved many times due to the fact that there is a modernization of oil refining enterprises in the country. Moreover, the obtained results of calculations allow conducting more rational technological solutions for the construction of the flare tower and such solutions affect the period of the flare installation.Materials and methods.The technology of the flare tower construction as a part of the flare installation is quite complex due to the features of the unique structure and cramped construction site. Accordingly, the choice of technology for the flare tower construction is made by using the features of its design solution and by the detailed consideration of options for installation mechanization. The options are evaluated by using an economic criterion (reduced cost). The calculations are based on modern installation cranes recommended for usage on this type of unique structures.Results.As a result of technical and economic calculations of the flare tower construction technology, the method of its construction is chosen due to the rational version of installation mechanization. The paper presents the calculations’ results of the given costs and the technical characteristics of the cranes. In addition, the technology of the flare tower installation is organized with the method of the tower blocks assembly.Discussion and conclusions.As could be seen, the construction technology by the mixed scheme on the chosen option is developed by the authors.

scholarly journals The Method for Product Design Selection with Incomplete Linguistic Weight Information Based on Quality Function Deployment in a Fuzzy Environment

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Ming Li
Keyword(s):  
Product Design ◽  
Quality Function Deployment ◽  
Design Development ◽  
Quality Function ◽  
Advantages And Disadvantages ◽  
Fuzzy Environment ◽  
Design Requirements ◽  
Design Selection ◽  
The Given ◽  
The Relationship

The selection of a design for the given product is a critical problem in product design development. Focuses of the designers and customers on the design are not identical. In order to bridge the gap and provide a more relaxing way to select the design, a new method based on quality function deployment (QFD) is proposed. In such a method, customers are required to give their linguistic preferences on the design with respect to the customer requirements (CRs). In the rating of the weight of CRs, they are allowed to provide incomplete linguistic weight information and the objective optimization model is proposed to derive the exact linguistic weight information. Designers are required to rate the correlation between design requirements (DRs) and the relationship between the CRs and DRs to construct the house of quality. Opinions given by the customers are translated into the opinions with respect to the DRs based on the QFD. Afterwards, the priorities of the designs and design requirements are determined. The assessment results not only show the contribution of each design requirement to the customer satisfaction but also show the advantages and disadvantages of each design from the designers’ perspective clearly and directly. An example is provided to validate the applicability of the proposed method.

scholarly journals Modular Segmented Motor for Power-Assist Wheelchairs: Proof of Concept

Machines ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 227
Author(s):  
Ilya Galkin ◽  
Rahims Geidarovs ◽  
Andrejs Podgornovs
Keyword(s):  
Electric Vehicles ◽  
Permanent Magnet Synchronous Motor ◽  
Severe Disabilities ◽  
Synchronous Motor ◽  
The Other ◽  
Proof Of Concept ◽  
Detailed Consideration ◽  
Drive Motor ◽  
Implementation Aspects ◽  
The Given

This paper presents an analysis of the opportunity to increase the price availability of small electric vehicles, such as electric scooters, such as bicycles and wheelchairs, by applying expandability and modularity principles to their motors. Assuming that, in many cases, small electric vehicles are brought to the market in several power/price versions, the authors of this report evaluate the possibility of combining different numbers of electromechanical modules while, at the same time, maintaining the unity of the entire drive/motor scheme, thus making the mentioned expandability possible. Power-assist wheelchairs are taken as an example of the application, where such expandability is reasonable. The application provides a price reduction for the less powerful wheelchairs in the case of less severe disabilities. To start, the authors briefly compare multidrive schemes that ground the principle of modularity at the electromechanical level. Then, they outline a radially segmented motor concept and discuss this concept using the example of a permanent magnet synchronous motor. In particular, they propose a methodology for the calculation of its parameters and calculate the particular design details of such a motor. The motor is then analyzed with the help of its mathematical model, as well as experimentally. This tentative evaluation of two 50 W segments (of a 300 W 6-segment motor) proves that the proposed segmented modularity concept is feasible, and that it requires a more detailed consideration of the parameters and the other implementation aspects (power driver, control, cooling) of the given synchronous motor. Moreover, the concept might be successfully utilized in the designs of other motor types.

scholarly journals BIM-based LCA and energy analysis for optimised sustainable building design in Ghana

2020 ◽  
Vol 2 (11) ◽  
Author(s):  
Kofi A. B. Asare ◽  
Kirti D. Ruikar ◽  
Mariangela Zanni ◽  
Robby Soetanto
Keyword(s):  
Energy Analysis ◽  
Green Building ◽  
Building Design ◽  
Design Solution ◽  
Concept Design ◽  
Single Family ◽  
Design Development ◽  
Sustainable Building ◽  
Selection Decisions ◽  
Building Information

AbstractIntegration of Building Information Modelling (BIM) and Life Cycle Assessment (LCA) is regarded as useful for making design decisions regarding the environmental and health impacts of building products and materials. This research aimed at studying the process of BIM-LCA integration to assist designers in making sustainable material and product selection decisions in Ghana. A guidance framework for implementation of BIM-LCA supported by energy analysis has been developed to aid optimisation of sustainable design solutions based on simulations using Autodesk Revit as a BIM authoring tool, Green Building Studio and Tally to perform energy and LCA simulations on a hypothetical two-bedroom single-family house. The research considers both operational and embodied carbon effects of the design solution. The framework aligns with the RIBA Plan of Work 2013 Stages 0–2 (i.e. Strategic definition, Preparation and briefing, and Concept design) and presents a systematic approach for BIM-based LCA estimation for the early design stages using the Business Process Modelling Notation. The paper proposes a generic approach which has the potential to incorporate LCA as an integral part to the BIM-enabled design development process. This assists designers in decision-making that consider environmental impacts of materials and energy consumption as part of sustainable building design considerations.

scholarly journals Assessment of the reliability of thermal protection of enclosing structures of buildings at the design and operation stages

2018 ◽  
Vol 251 ◽  
pp. 03057
Author(s):  
Galina Shibaeva ◽  
Ekaterina Ibe ◽  
Denis Portnyagin
Keyword(s):  
Thermal Imaging ◽  
Thermal Protection ◽  
Residential Buildings ◽  
Building Envelope ◽  
Design Solution ◽  
Construction Technology ◽  
The Finite Element Method ◽  
Building Envelopes ◽  
Thermal Bridge ◽  
Continental Climate

The article presents recommendations for assessing the heat and energy efficiency of a design solution for a building envelope based on the calculation of energy costs during typical periods of time. The recommendations are based on the analysis of defects in thermal protection of building envelopes during design and construction, by studying design documentation, thermal imaging, calculation and verification of building envelope components. Results of calculation of temperature in hazardous structural sites for the design winter conditions with the help of software that implements the finite element method are presented. In the present paper, the design solutions of the nodes of the walls of residential buildings are considered, where, during thermal imaging, thermal bridge are visible through the external walls. It is shown that the using of multilayer brick walls in the apartment houses in a sharply continental climate is irrational due to the rapid deterioration of the properties of the insulation layer. Also, the thermal protection of buildings is influenced by the design solution defects and violation of construction technology.

Method of computer-aided profiling of components of flow passages of centrifugal pumps for fuel and energy complex

2020 ◽  
Vol 12 (4) ◽  
pp. 260-267
Author(s):  
A. A. Vikhlyantsev ◽  
A. V. Volkov ◽  
Yu. V. Yavorovsky ◽  
A. A. Druzhinin
Keyword(s):  
Nuclear Power ◽  
Oil Refining ◽  
Thermal Engineering ◽  
Centrifugal Pumps ◽  
Flow Passage ◽  
Energy Complex ◽  
Russian Economy ◽  
Production And Distribution ◽  
Technical Solutions ◽  
The Given

Today, the fuel and energy complex (FEC) is the basis of Russian economy. It includes the most dynamically developing industries, such as petrochemical, oil refining, etc., associated with the production, transportation and processing of various fuels, as well as industries engaged in the production and distribution of electricity: thermal engineering, hydropower engineering and nuclear power engineering. The nomenclature of FEC centrifugal pumps includes a wide list of names: singleand multistage centrifugal pumps of low, medium and high pressure for clean water, water with impurities and various aggressive media [1, 2], pumps for oil production and transportation (trunk, booster, electric centrifugal production pumps, pumps for pumping leaks, etc.) and special pumps used in oil refining (cracking, cantilever chemical, etc.) [3]. The development of technical solutions aimed at improving energy efficiency as well as reliability and durability is one of the trends in the development of centrifugal pumps FEC that are most widely covered in engineering literature [4.9]. Along with this, reducing the complexity and cost of production of these pumps due to the automation of the design process remain just as important. In the given article, questions of development of a method of automated profiling of components of flow passage of centrifugal pumps for needs of FEC are considered. The description of the proposed method and the results of its approbation on the example of profiling of the flow passage of the impeller of the centrifugal cantilever chemical pump AH 12.5/50 are presented. Comparison with other known methods is carried out. The estimation of time costs for design works is carried out. It has been found that the automated profiling of the flow passage of the impeller according to the presented method took 720 times less time than manual profiling using conventional methods.

Influence of Ship Design Complexity on Ship Design Competitiveness

2021 ◽  
pp. 1-15
Author(s):  
Ali Ebrahimi ◽  
Per O. Brett ◽  
Stein O. Erikstad ◽  
Bjorn E. Asbjørnslett
Keyword(s):  
New Technologies ◽  
Ship Design ◽  
Design Solution ◽  
Design Development ◽  
Work Processes ◽  
Design Complexity ◽  
Complexity Management ◽  
Functional Capabilities ◽  
The Right ◽  
Competitive Products

Complexity is discussed in design literature mainly through its negative and in some cases positive consequences. This article critically reviews and elaborates the effects of complexity on competitiveness in ship design, its directionality, and magnitude. The article introduces a model for the measurement of ship design complexity and ship design competitiveness based on predefined factors. Archival data of 100 ship design projects from eight different Norwegian designers are used as case study. Multivariate data analysis techniques are employed to study the research model. The results show a significant correlation between complexity and competitiveness in ship design, where the magnitude and directionality of influence vary among different complexity factors. Our findings provide a basis for enhancing complexity management in ship design. Introduction Continual technology improvements and market volatility with its associated uncertainties have a significant impact on and partly change ship design customers’ expectations. To be successful in such a market, not only does it require the development of competitive products but also the accompanying work processes and the organization or firm framing the development of the vessel solution are involved. Ulstein and Brett (2015) define ship design competitiveness in terms of doing the right thing (effectiveness), doing the right thing right (efficiency), and with the right resources (efficacy) to cover product, process, and firm aspects of competitiveness. To improve their success, ship design companies typically tend to focus on the introduction of new technologies, and, in some cases, extra functional capabilities, which have led to large and complex vessels over the years. To a lesser extent, ship designers have put emphasis on the overall needs of customers. Securing a higher overall performance yield of the ship design solution than peer vessels out in the market is not a common practice among ship designers; they rather focus on a typical and traditional subset of performances. The implications and the consequences of such strategies in ship design have led to a growing need for a new set of design tools and project-making skills, a more extensive design process with different disciplines involved, and many iterations in the design development process.

Reentry Design Solution for a Hypersonic Small Capsule

2013 ◽  
Vol 332 ◽  
pp. 33-43
Author(s):  
Radu Dan Rugescu
Keyword(s):  
Attitude Control ◽  
Cost Reduction ◽  
Selection Criteria ◽  
Research Team ◽  
High Mass ◽  
Design Solution ◽  
Specific Research ◽  
Optimal Balance ◽  
Simplified Method ◽  
The Given

Restriction and selection criteria of inertial guidance sensors and system for a small recoverable capsule from onboard a hypersonic, atmospheric reentering rocket vehicle have attracted a specific research on the reentry design and challenges, with emphasize on the overall cost reduction and an optimal balance between the performances and costs under the given exploitation constraints. A simplified method for attitude control is derived that shows an easy accommodation in the capsule, given its high mass constraints, and convenient applicability for the class of small payloads under investigation. The palled experiments and investigating methodology is shown, as the result of the ORVEAL contract research team of ADDA-Association Dedicated to Development in Astronautics research organization, under the sponsorship of Romanian UEFISCDI authority for scientific research.

scholarly journals Implementing Virtual Reality Headsets in Design Education

2020 ◽  
Vol 22 ◽  
Author(s):  
Christine Peierh Chan
Keyword(s):  
Virtual Reality ◽  
Interior Design ◽  
Design Education ◽  
Statistical Power ◽  
Design Solution ◽  
Design Development ◽  
Wheelchair Users ◽  
Before And After ◽  
Store Design ◽  
Design Solutions

While Virtual Reality (VR) is now widely used as a final design presentation tool, little research focuses on the role of VR during design development processes in design education. However, properly positioned and pedagogically researched VR holds great potential for helping students make better design decisions to support end-users with diverse needs. This research seeks to connect the value of VR as not only a presentation medium but also as a “perspective taking” tool to help students develop better design solutions. Undergraduate Interior Design students (n=15) were recruited to experience their already completed studio projects of a retail store design as a VR character in a virtual wheelchair. Each participant was asked to assess the effectiveness of their design solution for wheelchair users before and after the intervention. The interactions students had during their VR sessions were recorded and content analyzed for emerging themes. Although the sample size was small to achieve statistical power, qualitative findings revealed numerous perceptual shifts as students identified problems for wheelchair users in their design solutions.

scholarly journals WRITTEN DOCUMENTS ON THE BLACK SEA DIPLOMACY VECTOR OF HETMAN BOHDAN KMELNYTSKY

2019 ◽  
pp. 61-68
Author(s):  
F. Turanly
Keyword(s):  
Foreign Policy ◽  
Ottoman Empire ◽  
Black Sea ◽  
The Black Sea ◽  
Interstate Relations ◽  
Political Activities ◽  
Detailed Consideration ◽  
The Given ◽  
Written Sources

Making studies of written sources relating to the diplomatic activities of Hetman Bohdan Khmelnytsky, and particularly the Turkish-Ottoman written documents (manuscripts), is required to obtain new data, so as to confirm the fact of the interstate relations of the Ukrainian Cossack State with the Ottoman Empire to have been rising. Moreover, an important meaning of the Black-Sea vector of the foreign policy of the said Hetman was accounted forf by the needs for the Ukrainian people to get sure of a support in its liberation struggle against its enemies. There have been analysed the causes of strengthening the role of the above said trend in the foreign political activities of B. Khmelnytsky. By the way, this problem in due time was paid attention to in academic studies of such famous Ukrainian historians, as Mykhailo Hrushevsky, Omelian Pritsak and Yaroslav Dashkevych, who concentrated mainly in studying separate aspect of the diplomatic activities of the Cossack-Hetmanic Ukraine in regard of the Crimean Khanate and Higher Porte in the middle of the 17th century. For a more detailed consideration of the problem touched in the given study there are also of importance the data, we have obtained from the original chronical manuscript “An order-letter from the Turkish Sultan Mehmed IV to the Cossack Hetman B. Khmelnytsky” that is kept in Kamyanets-Podilsky State-owned Ukraine’s Historical Museum-Archive, and which was firstly involved in an academic circulation. In this letter the Hetman speaks of his devoted friendship with the Sultan and of his loyal servicing to the latter one.

Filtering of High Solids Concentration Media Using Complex Powerful to the Flow

2021 ◽  
Vol 9 (2) ◽  
pp. 49-53
Author(s):  
Vladimir Devisilov ◽  
E. Sharay ◽  
I. Myagkov
Keyword(s):  
Service Life ◽  
High Viscosity ◽  
Solid Particles ◽  
Oil Refining ◽  
Flow Section ◽  
Regeneration Ability ◽  
Sediment Layer ◽  
Centrifugal Forces ◽  
Design Development ◽  
High Concentration

Currently, intensification of the filtering processes in media characterized by high concentration of solid particles remains of great interest in many sectors, such as oil production, oil refining, chemical, medical and food industries. One of the reasons that impede filtering could be the high viscosity level of the dispersion medium. It is known that the filtering rate is inversely proportional to viscosity; therefore, filtering of viscous liquids would be carried out much slower. In addition, filtering media characterized by high concentration of solid particles leads to higher costs for creating the process driving force, fast pores fouling in the filtering material and the need for frequent regeneration of the filtering material. Many media characterized by high viscosity, such as mineral oils, polymer solutions and melts, heavily polluted waters tend to reduce the flow section of the porous material channel; and, as a result, hydraulic characteristics are changing and regeneration of the filtering material is hampered. Therefore, replacement of the filtering material is required, which increases the costs. It is possible to intensify the filtering process by ensuring the suspension preliminarily preparing, for example, by increasing the medium temperature or decreasing the suspension viscosity, as well as adding a suitable solvent. In many technological processes such methods are unacceptable. Design, development and study of devices that allow increasing the filtering material service life and reducing energy consumption to create the required pressure gradient while maintaining the device compactness and ensuring the required fineness of filtration still remains a topical task. This paper is proposing to use filtering in combination with cleaning in centrifugal and vibration fields created in hydrodynamic filters. Centrifugal forces field in the hydrodynamic filter is formed due to liquid tangential introduction into the apparatus and rotation of the cylindrical porous filter partition. The method differs from other technologies by creating a potential flow in the apparatus annular zone within the centrifugal forces field. Such flow organization allows purging up to 80% of polluting substances from the media under cleaning by the centrifugal force mechanism; and such substances are removed from the filter without deposition on the filter partition. This would reduce the load on filter material and increase its service life. Vibration of the filtering partition provided for in its structure makes it possible to destroy the sediment layer thereon and to direct the sediment into the filtrate flow. Thus, the proposed hydrodynamic filter is provided with the self-regeneration ability.

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