scholarly journals Review-based Emergy Analysis of Energy Production

2015 ◽  
Vol 2 ◽  
pp. 85
Author(s):  
Ginta Cimdina ◽  
Toms Prodanuks ◽  
Dagnija Blumberga ◽  
Ivars Veidenbergs
Keyword(s):  
Thermal Energy ◽  
Energy Production ◽  
Production Systems ◽  
Emergy Analysis ◽  
Use Of Resources ◽  
State Economy ◽  
Definition Of ◽  
Economical Feasibility

The role of power and thermal energy is impossible to overestimate in development of both state economy sector and everyday life of households. Importance is connected with use of resources, economical feasibility and effect to climate changes. The optimization of energy production allows to promote development of sustainable society. The most popular and efficient technologies for generation of power and thermal energy are cogeneration plants (CHP). Traditional evaluation methodologies of energy production systems are based on analysis of energy and mass balances as well as on cost analysis. It is not enough for assessment of complete sustainability of system. Necessary environmental impact assessment of energy production is possible to implement by use of emergy analysis. Definition of emergy includes one type of energy, which is used directly or indirectly to produce materials, provide services and finances. Emergy dimension is emjoules (seJ.). Paper presents case study of emergy analysis of different operation modes of one cogeneration plant.

H2/O2 Cycles: Thermodynamic Potentialities and Limits

2003 ◽  
Author(s):  
M. Gambini ◽  
G. L. Guizzi ◽  
M. Vellini
Keyword(s):  
Production Systems ◽  
Renewable Energy Sources ◽  
H2 Production ◽  
Thermodynamic Cycles ◽  
A Value ◽  
Overall Performance ◽  
Definition Of ◽  
Working Parameters ◽  
O2 Production

In this paper, the thermodynamic potentialities and limits of the H2/O2 cycles are investigated. Starting from the conventional gas turbine and steam turbine technology, the paper qualitatively tackles problems related to a change of oxidizer and fuel: from these considerations, an internal combustion steam cycle (ICSC) is analyzed where steam, injected in the combustion chamber together with oxygen and hydrogen, is produced in a regenerative way and plays the important role of inert. A proper parametric analysis is then performed in order to evaluate the influence of the main working parameters on the overall performance of H2/O2 cycles. All the results are carried out neglecting the energy requirements for O2 and H2 production systems, but taking into account their work compression only. This choice permits great freedom in the definition of these thermodynamic cycles and allows general considerations because there is no need of any specification about H2 and/or O2 production systems and their integration with thermodynamic cycles. Therefore this paper can be framed in a context of oxygen and hydrogen centralized production (by nuclear or renewable energy sources for example) and in their distribution as pure gases in the utilization place. Adopting realistic assumptions, TIT of about 1350°C, the potentialities of H2/O2 cycles are very limited: the net efficiency attains a value of about 50%. Instead, adopting futurist assumptions, TIT = I700°C, a different H2/O2 cycle scheme can be proposed and more interesting performance is attained (a net efficiency value over 60%). The thermodynamic and technological aspects are completely addressed in the paper, underlining the great importance of the choice of the main working parameters.

PRIMARY ACCOUNTING OF BUSINESS EXPENSES

2021 ◽  
Vol 298 (5 Part 1) ◽  
pp. 87-91
Author(s):  
Olga ROMANOVA ◽  
Svetlana REPINA ◽  
Keyword(s):  
Production Systems ◽  
Visual Display ◽  
The State ◽  
Energy Complex ◽  
State Economy ◽  
Primary Documents

The article analyzes the process of documenting the costs of enterprises ‘ activities. In the process of activity, enterprises bear a variety of costs in the production of necessary products for the functioning of production and non-production systems in the state, but the continuity of this process depends on the well-coordinated work of the energy complex, since energy consumers are all areas of the state economy that are set when forming GDP. Therefore, the importance of analyzing the composition of costs, production, financial, operational, and other types at energy enterprises is important, and given the gradual growth of the role of energy in the state economy, it is relevant. All expenses that are recorded in the company’s accounting records during the reporting period must be confirmed by documents characteristic of a certain group of expenses, so this particular direction was chosen for the study. The paper examined the existing features of the main primary documents for accounting for payroll accruals and payments, settlements with accountable persons, cash, material, and other expenses. In the process of writing the paper, the principle of filling out and containing 18 current documentary forms of the corresponding direction was described, divided into groups according to their purpose for a more visual display of the results of the study.

scholarly journals Studying the Role of System Aggregation in Energy Targeting: A Case Study of a Swedish Oil Refinery

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 958 ◽  
Author(s):  
Elin Svensson ◽  
Matteo Morandin ◽  
Simon Harvey ◽  
Stavros Papadokonstantakis
Keyword(s):  
Heat Exchange ◽  
Heat Recovery ◽  
Process Integration ◽  
Heat Integration ◽  
Direct Process ◽  
Utility System ◽  
Process Heat ◽  
Definition Of

The definition of appropriate energy targets for large industrial processes is a difficult task since operability, safety and plant layout aspects represent important limitations to direct process integration. The role of heat exchange limitations in the definition of appropriate energy targets for large process sites was studied in this work. A computational framework was used which allows to estimate the optimal distribution of process stream heat loads in different subsystems and to select and size a site wide utility system. A complex Swedish refinery site is used as a case study. Various system aggregations, representing different patterns of heat exchange limitations between process units and utility configurations were explored to identify trade-offs and bottlenecks for energy saving opportunities. The results show that in spite of the aforementioned limitations direct heat integration still plays a significant role for the refinery energy efficiency. For example, the targeted hot utility demand is reduced by 50–65% by allowing process-to-process heat exchange within process units even when a steam utility system is available for indirect heat recovery. Furthermore, it was found that direct process heat integration is motivated primarily at process unit level, since the heat savings that can be achieved by allowing direct heat recovery between adjacent process units (25–42%) are in the same range as those that can be obtained by combining unit process-to-process integration with site-wide indirect heat recovery via the steam system (27–42%).

Luxury Business

2017 ◽  
Author(s):  
Pierre-Yves Donzé ◽  
Rika Fujioka
Keyword(s):  
Brand Management ◽  
Production Systems ◽  
Value Chains ◽  
Grey Zone ◽  
Luxury Brands ◽  
Services Research ◽  
Goods And Services ◽  
Definition Of ◽  
Clear Idea

The luxury business has been one of the fastest growing industries since the late 1990s. Despite numerous publications in management and business history, it is still difficult to have a clear idea of what “luxury” is, what the characteristics of this business are, and what the dynamics of the industry are. With no consensus on the definition of luxury among scholars and authors, the concept thus requires discussion. Luxury is commonly described as the high-end market segment, but the delimitation of the lower limit of this segment and its differentiation from common consumer goods are rather ambiguous. Authors use different terminology to describe products in this grey zone (such as “accessible luxury,” “new luxury,” and “prestige brands”). Despite the ambiguous definition of “luxury,” various companies have described their own businesses in this way, and consumers perceive them as producers of luxury goods and services. Research on luxury business has focused mostly on four topics: (1) the evolution of its industrial organization since the 1980s (the emergence of large conglomerates such as Moët Hennessy Louis Vuitton SE or LVMH, and the reorganization of small and medium-sized enterprises); (2) production systems (the introduction of European companies into global value chains, and the role of country of origin labels and counterfeiting); (3) brand management (using heritage and tradition to build luxury brands); and (4) access to consumers (customization versus standardization). Lastly, new marketing communication strategies have recently been adopted by companies, namely customer relations via social media and the creation of online communities.

The role of character in talent identification and development in New Zealand rugby union

2019 ◽  
Vol 14 (3) ◽  
pp. 406-418
Author(s):  
Ryan Rosevear ◽  
Tania Cassidy
Keyword(s):  
New Zealand ◽  
Rugby Union ◽  
Talent Identification ◽  
Systems Model ◽  
A Value ◽  
Universal Definition ◽  
Definition Of ◽  
Development Manager

The purpose of the study was to gain understanding of how character is understood in the New Zealand Rugby (NZR) ecology and how the Player Development Manager (PDM) in one Provincial Union (PU) negotiates, constructs and operationalizes interpretations of character within talent identification and development practices. The study design was informed by Bronfenbrenner’s ecological systems model of development and the methodology was case study. The participant in the study was the PDM who worked for one provincial rugby union and NZR. Data was gained using; interviews, document analysis and observations. An iterative strategy was employed when adopting the deductive and inductive analysis. The study found that across the NZR ecology there was no universal definition of character, or set of criteria used to assess players’ character. Within the NZR macrosystem there were formal policies that explicitly identified character as a value to be assessed. Yet, implicit understandings and assessment of character also existed. The PDM working in a microsystem constructed his understanding and assessment of character based on his experiences working with, and for, NZR (macrosystem) and the PU (exosystem) respectively, as well as drawing on his personal value set. The findings of this study are significant not only for rugby, in New Zealand and elsewhere, but they are relevant and topical for any selector, recruitment agent or coach who implicitly and explicitly (de)selects participants based on character.

The Role of Performance Pyramid in Sports Management Case Study - The Athletics Section in CSM Onesti

2015 ◽  
Vol 24 (3-4) ◽  
pp. 215-234
Author(s):  
Ingrid Vasilica Istrate ◽  
Sabina Macovei ◽  
Monica Bucur
Keyword(s):  
Performance Management ◽  
High Performance ◽  
Sport Performance ◽  
Sports Management ◽  
Sports Activity ◽  
Number Of Children ◽  
Use Of Resources ◽  
Management Case Study

Abstract Sport represents the joy of living, to succeed, to self-exceed! Whereas the Romanian sport is at a crossroads, regarding the fewer and fewer number of children who want to practice a sport, as well as the economic situation in which it is situated, the goal of reviving the entire sports activity and to bring it to the top where Romania stayed many years in the past becomes a must. In this sense, there must be found solutions and proper strategies that lead to its revival. This issue requires a systemic approach capable to reestablish “the pyramid of sport performance” on functional principles. The present thesis is a way of organizing sports activities at club’s level, wards, groups, based on the performance pyramid, in order to achieve a high performance management, which is part of the sports reform, ranging from all of its forms, such as: human resources, financial, material, taking into account modern mechanisms (for attraction and use of resources considering the means which are available and necessary).

scholarly journals The dynamics of food fraud: The interactions between criminal opportunity and market (dys)functionality in legitimate business

2017 ◽  
Vol 17 (5) ◽  
pp. 605-623 ◽  
Author(s):  
Nicholas Lord ◽  
Cecilia Juliana Flores Elizondo ◽  
Jon Spencer
Keyword(s):  
Food System ◽  
Food Fraud ◽  
Organizational Settings ◽  
Legitimate Business ◽  
Common Definition ◽  
Business Structures ◽  
Criminal Opportunity ◽  
Definition Of

This article conceptualizes ‘food fraud’ by shifting analytical focus away from popular/policy conceptions foregrounding the centrality of organized crime towards understanding the factors that shape the organization of food frauds. We argue that food fraud, rather than being an ‘exogenous’ phenomenon perpetrated by externally organized (transnational) ‘criminal enterprise’, is better understood as an ‘endogenous’ phenomenon within the food system where legitimate occupational actors and organizations are in some way necessarily involved. Criminal opportunities arise under conducive conditions as part of legitimate actors’ routine behaviours. Our contention is that the common definition of food fraud is too prescriptive and fails to allow space to understand the role of different actors and their motivations. We analyse a case study in soft drinks, presenting the necessary role of legitimate, occupational actors within/between legitimate organizational settings and markets, and demonstrate how criminal behaviours can be concealed and disguised within ‘ready-made’ market and business structures.

scholarly journals The Role of Electric Snowmobiles and Rooftop Energy Production in the Arctic: The Case of Longyearbyen

2021 ◽  
Vol 9 (4) ◽  
pp. 46-53
Author(s):  
Shayan Dadman ◽  
◽  
Bernt A. Bremdal ◽  
Kristoffer Tangrand ◽  
◽  
...  
Keyword(s):  
Energy Production ◽  
Energy System ◽  
Limited Range ◽  
Climate Impact ◽  
The Arctic ◽  
Fleet Management ◽  
The Individual ◽  
Positive Effect

The research presented here has been conducted in the Smart Charge project. It has addressed the use of renewables, e-mobility and battery charging in the Arctic as part of an effort to solicit fossil-fuelled alternatives. Of particular interest has been to determine what impact and support electric snowmobiles can provide together with local, renewable energy production. The relevance of vehicle-togrid/ building (V2G/B) solutions have been investigated in the project too. The idea has been to use electric snowmobiles for load shaving during extensive periods of the year. The research has looked at cost aspects, value stacking, climate impact as well as aggregated effects of controlled fleet management of idle snowmobiles. A case study undertaken at Longyearbyen at Svalbard, Norway has provided the most important empirical basis for the research presented. The research concludes that electric snowmobiles can have a positive effect on the local energy system and despite limited range can be quite attractive for the individual to operate if energy for charging is based on local driving solar power.

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