ASSESSING THE IMPACT OF IMPROVING MANAGEMENT QUALITY THERMAL AND HYDRAULIC MODES ON THE EFFICIENCY OF THE COMBINED SYSTEM DISTRICT HEATING

2020 ◽  
Vol 5 ◽  
pp. 138-143
Author(s):  
S.P. PETROV ◽  
K.V. PODMASTERYEV ◽  
A.V. PILIPENKO ◽  
N.I. MARKIN ◽  
O.S. NIKITENKO ◽  
...  
Keyword(s):  
Heat Supply ◽  
District Heating ◽  
Combined System ◽  
Management Quality ◽  
Hydraulic Regime ◽  
The Impact

The questions of influence of thermal and hydraulic regime management quality in cogenerated system of centralized heat supply on its effectiveness are observed.

scholarly journals Technological Innovation in the Aspect of Safety in the Process of Heat Supply

2019 ◽  
Vol 1 (1) ◽  
pp. 412-418
Author(s):  
Aleksandra Wrzalik ◽  
Matevž Obrecht
Keyword(s):  
Energy Efficiency ◽  
Heat Supply ◽  
Renewable Energy Sources ◽  
District Heating ◽  
High Energy ◽  
The European Union ◽  
Heating Systems ◽  
Operation Conditions ◽  
Network Operation ◽  
The Impact

AbstractIn recent years heating in Poland has been transformed as a result of the priorities of the country's energy policy implemented within the European Union. The increase in energy security, the development of renewable energy sources and the fulfilment of legal and environmental requirements are very important. Exploitation of district heating systems should ensure reliable and safe heat supplies for industrial and municipal customers with high energy efficiency and reduction of environmental impact. The article discusses the conditions and directions of centralized heating systems development as well as technical and economic issues, which are important for the security of heat supply. The Author describes selected technological innovations used in the technical infrastructure for heat transfer and modern IT systems which are improving the management of heating systems. The article includes the results of simulation research with use of IT tools showing the impact of selected innovations on the improvement of network operation conditions. Directions of modernization of heating systems in the aspect of increasing energy efficiency and security of heat supply have also been indicted here.

Potential carbon emissions reduction related to the recovery of unutilised waste heat

2021 ◽  
pp. 014362442098627
Author(s):  
Lina Aglén
Keyword(s):  
Carbon Emissions ◽  
Heat Supply ◽  
Waste Heat ◽  
District Heating ◽  
Technical Note ◽  
Building Stock ◽  
Heat Potential ◽  
The Uk ◽  
The Impact ◽  
Heating Networks

The introduction of district heating will have a significant impact on the building services industry, from the architecture of a building to its operation. This technical note investigates a delimited portion of the potential of currently unutilised heat which has the possibility to supply district heating networks in the UK. The UK industrial sector, wastewater treatment facilities and the existing UK waste incineration plants all produce waste heat available in a temperature range suitable for extraction into district heating networks via commercialised techniques broadly used in other countries. This technical note presents a comparative literature review, comparing UK statistics and studies with performance data based on Swedish operational facilities. It finds 51.7TWh of currently unutilised heat could be recovered annually, with a significant associated emission decrease if incorporated into the heat supply of the UK building stock. A quantitative analysis is carried out to compare the identified potential with the current UK heat demand and the potential impact on the UK carbon emissions is estimated. The calculations indicate a reduction of 14% in the required UK total domestic heat supply, despite only including a limited fraction of the available waste heat potential. This technical note serves to highlight and emphasise the large amount of available waste heat potential currently not utilised in the UK. By estimating the impact of waste heat utilisation and incorporation into district heating and heat networks in the UK, the technical note aims to fuel discussion around the further incorporation of waste heat to be utilised in the UK heat sector.

Analytic Optimization of Cost Effective Thermoelectric Generation on Top of Rankine Cycle

2013 ◽  
Author(s):  
Kazuaki Yazawa ◽  
Yee Rui Koh ◽  
Ali Shakouri
Keyword(s):  
Steam Turbine ◽  
Fuel Efficiency ◽  
Cost Effective ◽  
Rankine Cycle ◽  
Energy Conversion Efficiency ◽  
Design Parameters ◽  
Steam Temperature ◽  
Combined System ◽  
Fuel Consumption Rate ◽  
The Impact

Thermoelectric (TE) generators have a potential advantage of the wide applicable temperature range by a proper selection of materials. In contrast, a steam turbine (ST) as a Rankine cycle thermodynamic generator is limited up to more or less 630 °C for the heat source. Unlike typical waste energy recovery systems, we propose a combined system placing a TE generator on top of a ST Rankine cycle generator. This system produces an additional power from the same energy source comparing to a stand-alone steam turbine system. Fuel efficiency is essential both for the economic efficiency and the ecological friendliness, especially for the global warming concern on the carbon dioxide (CO2) emission. We report our study of the overall performance of the combined system with primarily focusing on the design parameters of thermoelectric generators. The steam temperature connecting two individual generators gives a trade-off in the system design. Too much lower the temperature reduces the ST performance and too much higher the temperature reduces the temperature difference across the TE generator hence reduces the TE performance. Based on the analytic modeling, the optimum steam temperature to be designed is found near at the maximum power design of TE generator. This optimum point changes depending on the hours-of-operation. It is because the energy conversion efficiency directly connects to the fuel consumption rate. As the result, physical upper-limit temperature of steam for ST appeared to provide the best fuel economy. We also investigated the impact of improving the figure-of-merit (ZT) of TE materials. As like generic TE engines, reduction of thermal conductivity is the most influential parameter for improvement. We also discuss the cost-performance. The combined system provides the payback per power output at the initial and also provides the significantly better energy economy [$/KWh].

scholarly journals Excess heat supply collaborations within the district heating sector: Drivers and barriers

2015 ◽  
Vol 7 (3) ◽  
pp. 033117 ◽  
Author(s):  
Sofia Päivärinne ◽  
Olof Hjelm ◽  
Sara Gustafsson
Keyword(s):  
Heat Supply ◽  
District Heating ◽  
Excess Heat

scholarly journals Wastewater Treatment Plants as Local Thermal Power Stations—Modifying Internal Heat Supply for Covering External Heat Demand

Processes ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 1981
Author(s):  
Florian Kretschmer ◽  
Bernd Hrdy ◽  
Georg Neugebauer ◽  
Gernot Stoeglehner
Keyword(s):  
Wastewater Treatment ◽  
High Temperature ◽  
Low Temperature ◽  
Feasibility Study ◽  
Heat Recovery ◽  
Heat Supply ◽  
Wastewater Treatment Plants ◽  
Internal Heat ◽  
District Heating ◽  
Gas Combustion

To counteract climate change, the application of renewable energy sources and their efficient use are of crucial importance. In this context, wastewater has also gained increased attention in recent years. For decades, wastewater treatment plants have applied the heat from digester gas combustion to supply internal demands. However, in the context of efficient energy use the question arises: can using high temperature heat for supplying low temperature demand still be considered the best option? This article presents an innovative approach to covering wastewater treatment plant (WWTP) internal demand with low temperature wastewater heat recovery, making thermal energy from digester gas combustion available for feed-in to a local high temperature district heating network. The presented feasibility study was carried out in an Austrian municipality and investigates the heat balance, the economic risk, climatic benefits and the social aspects of the suggested approach. The practical implementation of the novel approach was planned in two steps. First, the WWTP should be connected to the district heating network to enable the feed-in of excess heat. Second, the WWTP internal heat supply should be modified and based on wastewater heat recovery from the effluent. Due to the promising results of the feasibility study, the first step was realized in summer 2020. The second and final step was initiated in 2021.

scholarly journals Management of modernization of heat supply system of the region in the context of its sustainable development

2020 ◽  
pp. 20-36
Author(s):  
Tetiana Zheliuk
Keyword(s):  
Energy Efficiency ◽  
Sustainable Development ◽  
Heat Supply ◽  
District Heating ◽  
Heat Supply System ◽  
Heating System ◽  
Energy Sector ◽  
Supply System ◽  
District Heating System ◽  
The Sustainable Development

Introduction. One of the main directions of ensuring the sustainable development of the national economy and its regions is the reform of the energy sector, which can take place through the modernization or innovation of its components. An important component of these reforms is to provide the population with the environmentally friendly and socially safe thermal energy. At the present stage of management, the heat supply is the most costly branch of public utilities, which is supplemented by the problems of the inefficient fuel balance structure; worn-out infrastructure and low energy efficiency. This highlights the need to study the management of modernization of the heat supply system in the region in view of the declared vectors of the long-term development. Object of research is the process of managing the modernization of the heat supply system in the region. Subject of the research is a set of scientific approaches and practical mechanisms of modernization of the heat supply system of the region in the context of ensuring its sustainable development. Objective. The conceptual foundations of modernization of the heat supply system of the region in the context of its sustainable development through the introduction of the innovative technologies both in the management process and in the energy sector itself is substantiated in the paper. Methods. The following general scientific methods were used during the research process: system, structural analysis, grouping, when studying the structural elements and isolation of problems of development of the heat supply system of the region; historical analysis, when considering the scientific principles and institutional mechanism of modernization of the region’s heat supply system; comparative analysis in assessing the possibilities of the green transition of the heat supply system of the region and also when considering the features of the use of grant resources in the modernization of the heat supply system of the region; economic analysis in assessing the current state of the district heating system, etc. results. The essential determinants of the heat supply system of the region are analyzed, the objective need, organizational and economic mechanisms for managing the modernization of the heat supply, taking into account the need for the balanced development of the energy sector of the region are verified. The scientific novelty of the obtained results lies in the substantiation of the conceptual approaches to the management of modernization of the heat supply system of the region by innovating the forms and methods of managerial influence on the heat supply system of the region. The conclusion is made about the following effective approaches in managing the modernization of the district heating system: planning of the sustainable development of the energy sector, development of programs for modernization of the district heating, implementation of the infrastructure and soft projects, implementation of the international projects, motivation of households and entrepreneurship in the heat sector, participation in the grant requests, in state crediting programs, realization of the business projects in the field of production of environmentally friendly fuel; conducting an information campaign among the population and other key market players to raise the awareness of the energy efficiency financing mechanisms. The practical significance of the obtained results is that the developed recommendations will be used to improve the organizational and economic mechanism of management of the district heating system modernization and ensure its sustainable development.

Methods for Comprehensive Analysis of Heat Supply Reliability

2013 ◽  
Vol 2 (4) ◽  
pp. 120-142
Author(s):  
V. A. Stennikov ◽  
I. V. Postnikov
Keyword(s):  
Heat Supply ◽  
Methodological Approach ◽  
Flow Distribution ◽  
Heat Supply System ◽  
Short Review ◽  
Comprehensive Analysis ◽  
Heat Energy ◽  
Production And Distribution ◽  
The Impact ◽  
Supply Reliability

The paper deals with the problem of comprehensive analysis of heat supply reliability for consumers. It implies a quantitative assessment of the impact of all stages of heat energy production and distribution on heat supply reliability for each consumer of the heat supply system. A short review of existing methods for the analysis of fuel and heat supply reliability is presented that substantiates the key approaches to solving the problem of comprehensive analysis of heat supply reliability. A methodological approach is suggested, in which mathematical models and methods for nodal evaluation of heat supply reliability for consumers are developed and the studies on the impact of different elements of fuel and heat supply systems on its level are described. Mathematical modeling is based on the Markov random processes, models of flow distribution in a heat network, deterministic dependences of thermal processes of heat energy consumption and some other models.

The Impact of Tariff Regulation on Potential Investor’s Decision in District Heating

2016 ◽  
Vol 2016 (5) ◽  
pp. 92-112
Author(s):  
Viktoriya Gimadi
Keyword(s):  
Current System ◽  
Investment Decision ◽  
District Heating ◽  
Rate Of Return ◽  
Total Revenue ◽  
Negative Effect ◽  
The Impact ◽  
The Empirical Analysis ◽  
Efficiency Indicators

The paper analyses the ways how long-term tariff regulation impacts on investment decision in district heating in Russia. Concessions in district heating gave us good chance to analyze impact of tariff regulation on the potential concessionaire decision who is choosing between agreements. The empirical analysis shows that potential concessionaire makes such decisions taking into account specific tariff parameters. The probability of attracting potential investor increases because of indicated volume of rate of return or including energy efficiency indicators; the ratio of operating expenses has negative effect on the probability. The growth rates of total revenue indicated for all years of the planned agreement has no effect on the probability. Potential concessionaire prefers to choose agreements, where the volume of investment commitments is lower, because he is not ready to assume ambitious commitments in the district heating in the current system of regulation.

The Impact of Tariff Regulation on Investment in Russian Electricity Distribution Sector

2016 ◽  
Vol 2016 (5) ◽  
pp. 69-91
Author(s):  
Yuliya Orlova ◽  
Olga Kadreva
Keyword(s):  
District Heating ◽  
Distribution Networks ◽  
Investment Model ◽  
Electricity Distribution ◽  
Explanatory Factors ◽  
Dynamic Investment ◽  
Distribution Sector ◽  
The Impact ◽  
Positive Effect

The paper investigates the mid-term results of the tariff regulation influence on the amount of capital expenditures in Russian electricity distribution sector. We estimate panel data with the dynamic investment model using system GMM method. We showed that horizon of tariff regulation period is statistically significant and transition from the short-term regulation to the long-term tariff system had positive effect on the amount of regulated companies’ investments. At the same time we found that the design of long-term regulation applied in Russia in 2009–2013 (type of RAB-regulation and long-term indexation) was not statistically significant to the amount of investments. All over all, the amount of investments in electricity distribution networks has similar to European peers explanatory factors. The obtained results are important to the further improvement of regulation in power energy and can be applied in district heating as well.

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