Model characteristics of competition performance in terms of athletes’ functional fit-ness

Introduction. Nowadays, the theory of sports does not contain clear criteria for assessing sports fitness, which would reflect the model characteristics of competition performance. The article presents the research results on the functional state of athletes with different training process specifics as model characteristics of competition performance. The aim of the research is to identify and describe the model characteristics of competition performance as the main criterion for evaluating sports training in the theory of sports. Materials and Methods. Energy component of athletes’ functional fitness was studied in 80 qualified athletes (Candidates for Master of Sports, Masters of Sports, International Masters of Sports), specializing in running short, medium and long distances during the period of training for competitions. The study of the energy component was conducted using the inventory developed by B. F. Vashlyaev et al. (‘A method for evaluating physical performance based on minute volume of breathing dynamics ratio to increasing load power’). This method allows to identify which source of energy is used by the athlete while taking a cycle ergometer testing. Results. The authors identified the model characteristics of functional fitness in athletes with different training specifics, based on the energy component. The study provides physiological grounding from the point of view of appropriate interaction of energy supply systems. The key regulatory mechanisms associated with the metabolic reactions activation of adenosine triphosphate molecules production are described. Conclusions. Model characteristics of athletes' competition performance, obtained in this research, can be used by coaches in order to manage sports training effectively. Moreover, the identified model characteristics can be used as the main criteria for evaluating sports training in sports theory.

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Optimization of operation of energy supply systems with co-generation and absorption refrigeration

Thermal Science ◽

10.2298/tsci120503179s ◽

2012 ◽

Vol 16 (suppl. 2) ◽

pp. 409-422 ◽

Cited By ~ 3

Author(s):

Mirko Stojiljkovic ◽

Bratislav Blagojevic ◽

Goran Vuckovic ◽

Marko Ignjatovic ◽

Dejan Mitrovic

Keyword(s):

Energy Supply ◽

Electric Utility ◽

Heat Pumps ◽

Point Of View ◽

Mixed Integer ◽

System Control ◽

Absorption Refrigeration ◽

Simulation And Optimization ◽

Supply Systems ◽

Energy Supply Systems

Co-generation systems, together with absorption refrigeration and thermal storage, can result in substantial benefits from the economic, energy and environmental point of view. Optimization of operation of such systems is important as a component of the entire optimization process in pre-construction phases, but also for short-term energy production planning and system control. This paper proposes an approach for operational optimization of energy supply systems with small or medium scale co-generation, additional boilers and heat pumps, absorption and compression refrigeration, thermal energy storage and interconnection to the electric utility grid. In this case, the objective is to minimize annual costs related to the plant operation. The optimization problem is defined as mixed integer nonlinear and solved combining modern stochastic techniques: genetic algorithms and simulated annealing with linear programming using the object oriented ?ESO-MS? software solution for simulation and optimization of energy supply systems, developed as a part of this research. This approach is applied to optimize a hypothetical plant that might be used to supply a real residential settlement in Nis, Serbia. Results are compared to the ones obtained after transforming the problem to mixed 0-1 linear and applying the branch and bound method.

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Developing a Web-based Application for Energy Supply Systems

ICONIET PROCEEDING ◽

10.33555/iconiet.v2i3.28 ◽

2019 ◽

Vol 2 (3) ◽

pp. 164-169

Author(s):

Mohammed Faza ◽

Maulahikmah Galinium ◽

Matthias Guenther

Keyword(s):

Energy Supply ◽

Power Plants ◽

Acceptance Testing ◽

Design Activity ◽

Unit Testing ◽

Validity Testing ◽

Energy Supply System ◽

Time Series Modelling ◽

Supply Systems ◽

Energy Supply Systems

An energy supply system consists of a system of power plants and transmission anddistribution systems that supply electrical energy. The present project is limited to the modellingof the generation system. Its objective is the design and implementation of a web-basedapplication for simulating energy supply systems using the Laravel framework. The projectfocuses on six modules representing geothermal energy, solar energy, biopower, hydropower,storage, and fossil-based energy that are allocated to satisfy a given power demand. It isexecuted as a time series modelling for an exemplary year with hourly resolution. Thedevelopment of the software is divided into four steps, which are the definition of the userrequirements, the system design (activity, use case, system architecture, and ERD), the softwaredevelopment, and the software testing (unit testing, functionality testing, validity testing, anduser acceptance testing). The software is successfully implemented. All the features of thesoftware work as intended. Also, the software goes through validity testing using three differentinput data, to make sure the software is accurate. The result of the testing is 100% accuracy withrespect to the underlying model that was implemented in an excel calculation.

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MODES FEATURES OF INTEGRATED ENERGY SUPPLY SYSTEMS OPERATION

Electromechanical and energy saving systems ◽

10.30929/2072-2052.2018.2.42.61-67 ◽

2018 ◽

Vol 2 (42) ◽

pp. 61-67

Author(s):

D. Derevianko ◽

◽

O. Yarmoliuk ◽

O. Bespalyi ◽

◽

...

Keyword(s):

Energy Supply ◽

Supply Systems ◽

Energy Supply Systems

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Ecological life cycle analysis-based installation capacity determination of building energy-supply systems

Energy and Buildings ◽

10.1016/j.enbuild.2021.111002 ◽

2021 ◽

pp. 111002

Author(s):

Hualing Zhang ◽

Haitao Lv ◽

Mengru Ma

Keyword(s):

Life Cycle ◽

Life Cycle Analysis ◽

Energy Supply ◽

Building Energy ◽

Supply Systems ◽

Energy Supply Systems ◽

Capacity Determination

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Energy Hub Modelling for Multi-Scale and Multi-Energy Supply Systems

2019 IEEE Milan PowerTech ◽

10.1109/ptc.2019.8810641 ◽

2019 ◽

Author(s):

Lahiru Jayasuriya ◽

Modassar Chaudry ◽

Meysam Qadrdan ◽

Jianzhong Wu ◽

Nick Jenkins

Keyword(s):

Energy Supply ◽

Energy Hub ◽

Multi Scale ◽

Supply Systems ◽

Energy Supply Systems

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Profitability of Various Energy Supply Systems in Light of Their Different Energy Prices and Climate Conditions

Buildings ◽

10.3390/buildings10060100 ◽

2020 ◽

Vol 10 (6) ◽

pp. 100 ◽

Cited By ~ 2

Author(s):

Elaheh Jalilzadehazhari ◽

Georgios Pardalis ◽

Amir Vadiee

Keyword(s):

Renewable Energy ◽

Heat Pump ◽

Energy Supply ◽

Ground Source Heat Pump ◽

Energy Prices ◽

Single Family ◽

Climate Zones ◽

Ground Source ◽

Supply Systems ◽

Energy Supply Systems

The majority of the single-family houses in Sweden are affected by deteriorations in building envelopes as well as heating, ventilation and air conditioning systems. These dwellings are, therefore, in need of extensive renovation, which provides an excellent opportunity to install renewable energy supply systems to reduce the total energy consumption. The high investment costs of the renewable energy supply systems were previously distinguished as the main barrier in the installation of these systems in Sweden. House-owners should, therefore, compare the profitability of the energy supply systems and select the one, which will allow them to reduce their operational costs. This study analyses the profitability of a ground source heat pump, photovoltaic solar panels and an integrated ground source heat pump with a photovoltaic system, as three energy supply systems for a single-family house in Sweden. The profitability of the supply systems was analysed by calculating the payback period (PBP) and internal rate of return (IRR) for these systems. Three different energy prices, three different interest rates, and two different lifespans were considered when calculating the IRR and PBP. In addition, the profitability of the supply systems was analysed for four Swedish climate zones. The analyses of results show that the ground source heat pump system was the most profitable energy supply system since it provided a short PBP and high IRR in all climate zones when compared with the other energy supply systems. Additionally, results show that increasing the energy price improved the profitability of the supply systems in all climate zones.

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