scholarly journals Functional schemes for biomass use in autonomous heat power complexes of Kaliningrad region

2007 ◽  
pp. 591-596
Author(s):  
Elena Berkova ◽  
Viktor Selin
Keyword(s):  
Animal Husbandry ◽  
Heat Pumps ◽  
Energy Resources ◽  
Heat Power ◽  
Renewable Energy Resources ◽  
Resource Base ◽  
Solid Domestic Waste ◽  
Energy Deficiency ◽  
Functional Scheme ◽  
Kaliningrad Region

Energy deficiency of Kaliningrad region compels to look for the ways of using non-traditionaland renewable energy resources in the regional energy balance. One of the perspectiveresources is biomass which includes wood waste of forestry activity, solid domestic waste andcombustible industrial refuse, wastes of animal husbandry, poultry breeding and plantgrowing and etc. Based on preliminary estimation, biofuel can replace more than 85,000 tonsof equivalent fuel per year. Functional scheme of autonomous heat power complexes forKaliningrad region was worked out Resource base of these complexes will be large-scaleagroindustial enterprises, poultry factories, fur farms, timber enterprises and small individualfan11S. At such objects different organic waste materials of animal and plant origin will besubjected to ecological clean without waste processing with the production of biogas,natural fertilizers, heat energy and electricity. Combination of biogas units with wind energyturbines, solar collectors and heat pumps will allow complete application of traditional fueland energy resources.

scholarly journals Congestion Management of Microgrids With Renewable Energy Resources and Energy Storage Systems

2021 ◽  
Vol 9 ◽  
Author(s):  
Yaling Chen ◽  
Yinpeng Liu
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Programming Model ◽  
Congestion Management ◽  
Heat Pumps ◽  
Energy Resources ◽  
Mixed Integer ◽  
Network Reconfiguration ◽  
Renewable Energy Resources ◽  
Reliable Operation

With the increasing share of renewable energy resources in the microgrid, the microgrid faces more and more challenges in its reliable operation. One major challenge is the potential congestion caused by the uncoordinated operation of flexible demands such as heat pumps and the high penetration of renewable energy resources such as photovoltaics. Therefore, it is important to conduct microgrid energy management to ensure its reliable operation. The energy storage system (ESS) scheduling as an efficient means to alleviate congestion has been widely used. However, in the existing literature, the ESSs are usually scheduled by the microgrid system operator (MSO) in a direct control manner, which is impractical in the case where customers own ESSs and are willing to schedule ESSs by themselves. To resolve this issue, this study proposes a network reconfiguration integrated dynamic tariff–subsidy (DTS) congestion management method to utilize ESSs and network reconfiguration to alleviate congestion in microgrids caused by renewable energy resources and flexible demands. In the proposed method, the MSO controls sectionalization switches while customers or aggregators schedule ESSs in response to DTS to alleviate congestion. The DTS calculation model is formulated as a mixed-integer linear programming model, considering heat pumps (HPs), ESSs, and reconfigurable microgrid topology. The numerical results demonstrate that the proposed method can effectively use ESSs and network topology to alleviate congestion and the MSO does not need to take over the scheduling of the ESS.

scholarly journals An exergy-rational district energy model for 100% renewable cities with distance limitations

2020 ◽  
Vol 24 (6 Part A) ◽  
pp. 3685-3705
Author(s):  
Birol Kilkis
Keyword(s):  
Energy Systems ◽  
Heat Pumps ◽  
Climatic Conditions ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Holistic Model ◽  
District Energy ◽  
Energy Conversion And Storage ◽  
Insulation Thickness ◽  
And Storage

While moving towards 100% renewable district energy systems at low temperatures, the exergy of the district energy may decrease below the pumping exergy requirement, which eliminates the benefits of using low-exergy renewables. Because such a possibility may not be revealed by the First Law, an exergy-based holistic model for district energy systems was developed. Four tiers, namely renewable energy resources, energy conversion and storage, main district network, and the low-exergy district are identified. Each tier is indexed to the optimum plant-to-district distance for maximum exergy-based performance with minimum CO2 emissions responsibility. This model further optimizes the temperature peaking with heat pumps versus HVAC equipment oversizing and determines the optimum mix of renewables. Three alternatives of conveying and distributing exergy to the district were considered, namely: electricity only, electricity and heat with or without temperature peaking or equipment oversizing, and electricity, heat, and cold. Comparisons showed that the choice primarily depends upon the district size, district-to-plant distance, climatic conditions, local availability of RES, optimum supply temperature, and thermal condition of the buildings. Another algorithm optimizes the thermal insulation thickness in terms of equipment oversizing and temperature-peaking.

Design Criterion for Increasing the Performance of the Energy Plants

2001 ◽  
Author(s):  
Abdullah Kececiler
Keyword(s):  
Energy Production ◽  
Design Methodology ◽  
Power Plants ◽  
Design Criterion ◽  
Energy Resources ◽  
Heat Power ◽  
Renewable Energy Resources ◽  
Available Energy ◽  
Energy Plants ◽  
Heat Power Plant

Abstract Since the middle of this century the growing fact of the unexpected environmental conditions and the rapid increase in the energy consumption have resulted in the fact that the efficient use of the energy and to exploit a new and renewable energy resources are inevitable. In the recent years, increasing importance in the issue of the best use of available energy resources are discussed with the application of the combined heat-power plants. In this paper, the performance of the conventional energy plants and combined heat-power plants are compared. For this reason a new design criterions for the combined heat-power plant are introduced here. The rationality of these new design criterions are tested in thermal energy and gas turbine plants. The obtained results are then compared with the conventional energy plants. It is proven that this new design methodology will provide more energy saving and minimize the heat losses that is produced during energy production.

scholarly journals Objectivation of the Ecological and Economic Losses from Solid Domestic Waste at the Heating Enterprises

2021 ◽  
Vol 29 (3) ◽  
pp. 235-241
Author(s):  
Olga Panchenko ◽  
Maryna Domashenko ◽  
Oleksii Lyulyov ◽  
Nataliya Dalevska ◽  
Tetyana Pimonenko ◽  
...  
Keyword(s):  
Economic Loss ◽  
Power Industry ◽  
Production Costs ◽  
Energy Resources ◽  
Economic Losses ◽  
Total Production ◽  
Heat Power ◽  
Domestic Waste ◽  
Solid Domestic Waste ◽  
Morphological Composition

Abstract The aim of this research is to study theoretical and practical aspects of the ecological and economic losses from the use of solid domestic waste (SDW) as energy resources in the heat power industry of Ukraine. The methodical approaches to evaluating the ecological and economic losses caused by solid domestic waste (SDW) comprise: the developed algorithm, which evaluates the ecological and economic losses in the SDW use as fuel and energy resources in comparison with basic and project variant; the investigated morphological composition of SDW in the Ukrainian regions, on the basis of which there is proposed a matrix for further calculations of the ecological and economic loss from atmospheric pollution as a result of the energy-intensive SDW combustion at the power plants by the Ukrainian regions. The efficiency of using SDW as secondary energy resources, which essentially depends on the conventional energy resources combustion, is proved. According to the chemical and morphological composition of SDW, the average amount of harmful substances by their element constituents of SDW is determined. The economic loss from the combusting 1 ton of SDW as energy resources is estimated. Reasonability of using SDW as energy resources, based on the optimal ratio between conventional resources and energy-intensive SDW through minimizing total production costs and possible ecological and economic loss, is grounded. It is proved that while estimating the ecological and economic losses, it is necessary to consider the SDW morphological composition and regional specific features regarding the location of heat and power enterprises and organized storage landfills. It is grounded that the obtained estimates of the ecological and economic losses may be used for identifying the ecological and economic evaluation of the SDW efficiency use in the heat power industry at the regional level.

scholarly journals INTELLIGENT ROOFTOP GREENHOUSES AND GREEN SKYLINE CITIES

2019 ◽  
Vol 1 (2) ◽  
pp. 15-28
Author(s):  
Marius Balas ◽  
Jelena Nikolic ◽  
Ramona Lile ◽  
Mihaela Popa ◽  
Roxana Beiu
Keyword(s):  
Smart City ◽  
Integrated Management ◽  
Green Building ◽  
Heat Pumps ◽  
Energy Resources ◽  
Low Carbon ◽  
Solar Panels ◽  
Renewable Energy Resources ◽  
High Carbon ◽  
Water Flows

The paper proposes a new concept of green building, able to oppose the global warming, the Intelligent Rooftop Greenhouse iRTG, as a development of the Integrated Rooftop Greenhouse IRTG. Our approach is to re­place conventional roofs with IRTGs, which are constructively con­nected with the interior of the building by flows of energy, gazes (mainly O2 enriched air from RTG to building and CO2 enriched air from build­ing to RTG) and water in order to improve the building’s metabolism. A tight human-plant sym­biosis is created such way. iRTGs perfect this architecture by actively controlling the energy, gazes and water flows, by collecting the available renewable energy resources (geothermal, sun, wind) and by adding Internet of Things IOT features to the system, in order to connect it to a surrounding Smart City. This way iRTGs may achieve an efficient integrated management of energy, gases and water, using just existing technologies: heat pumps (water to water for building’s basement and air to air for green­house), solar panels, IOT equipment, etc., controlled in a smart/intelligent manner. If a Smart City is composed mostly of iRTG buildings it becomes a Smart Green Skyline City, with low carbon foot­print and high carbon offset. The paper provides a mathematical iRTG model.

scholarly journals Improving Regulation and the Role of Natural Risk Knowledge to Promote Sustainable Low Enthalpy Geothermal Energy Utilization

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2925
Author(s):  
Giorgio De Giorgio ◽  
Michele Chieco ◽  
Pier Paolo Limoni ◽  
Livia Emanuela Zuffianò ◽  
Vittoria Dragone ◽  
...  
Keyword(s):  
Geothermal Energy ◽  
Anthropogenic Activities ◽  
Global Scale ◽  
Heat Pumps ◽  
Local Scale ◽  
Energy Resources ◽  
Energy Utilization ◽  
Renewable Energy Resources ◽  
Technical Standards ◽  
Natural Risk

The use of geothermal energy resources to support anthropogenic activities have a long-lasting tradition, renewed in recent decades with the increasing use of low enthalpy geothermal energy (LEG) with combined systems of heat pumps and geothermal exchange, exploiting the enormous thermal capacity and very low temperature variability of subsoil, including rocks and water. The further potential global increase of LEG use could be enormous, although LEG is already the main geothermal energy sources in Europe, contributing significantly to reach 2030 UN sustainable development goals (SDGs) on renewable energy resources, as a further leg to support all necessary efforts for these scopes. This research pursues LEG spreading improving knowledge on limitations of guidelines, technical regulations and/or laws, briefly rules, especially in terms of potential risks or limitations due to environmental constrains or natural phenomena. A global documentary research, including scientific articles, books, technical reports from qualified institutions, technical standards, guidelines, regulations, and laws, was realized with three different groups of keywords. A total of 161 documents were selected after some steps, including quality check. Identical English and Italian keyword sets were used to span from an international global scale to the complex local scale which characterizes the Italian experience. A complex sheet was filled in for each document, supporting data discussion, planned with a geographical criterion, from global to local. The system of rules resulted worldwide inhomogeneous and complex, with high differences from countries, nations or regions, also at local scale. The low quality or the absence of simple and careful “rules” emerged an important obstacle to LEG diffusion that can guarantee sustainability and the absence of natural risks. Main virtuous systems of rules were recognized as very useful to promote LEG spreading but these are still uncommon. The discussion of optimal experiences and the overview of potential natural risks due to LEG complete the paper.

Renewable Energy Resources for Better Economics and Sustainable Living in Rural and Desert Areas

2019 ◽  
Vol 10 (12) ◽  
pp. 1165-1171
Author(s):  
Karl Gatterer ◽  
◽  
Salah Arafa ◽  
Keyword(s):  
Renewable Energy ◽  
Poverty Reduction ◽  
Energy Resources ◽  
Green Economy ◽  
Renewable Energy Resources ◽  
Economic Activities ◽  
Energy Materials ◽  
Sustainable Living ◽  
Sustainable Community Development ◽  
Access To Knowledge

Reliable and affordable energy is the key for the socio-economic development in rural and desert communities worldwide. While energy can be used for consumption purposes such as Lighting, Access to Information, Comfort and Entertainment, productive use of renewable energy is the key enabler for SMEs and Economy to grow. The paper examines the complex interactions among Energy, Materials, Water, Food, Building, Employment and Environment. It also discusses the implementation of renewable energy technologies to overcome some of barriers faced by rural villages and desert communities. It shows some of the special applications and approaches used over the past few decades in energy conversion, consumption and conservation to achieve poverty reduction, social justice and sustainable development. Field experiences in Basaisa projects, Egypt showed that open free dialogues with all stakeholders, site-specific education and training, appropriate local financing systems and access to knowledge are key-elements and essential factors for achieving green economy and sustainable community development. The coming decade will see a continued expansion of knowledge about renewable energy resources and its useful applications as systems friendly to the environment and as tools for economic activities, sustainable living and growth in rural and desert communities.

Management of Renewable Energy Resources in India

2012 ◽  
Vol 2 (11) ◽  
pp. 121-124
Author(s):  
Savitha C Savitha C ◽  
◽  
Dr. S. Mahendrakumar Dr. S. Mahendrakumar
Keyword(s):  
Renewable Energy ◽  
Energy Resources ◽  
Renewable Energy Resources
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