scholarly journals Mobile Thermal Energy Storage

2021 ◽  
pp. 44-50
Author(s):  
Vladimir Demchenko ◽  
Alina Konyk ◽  
Vladimir Falko
Keyword(s):  
Heat Supply ◽  
Heat Storage ◽  
Peak Load ◽  
District Heating ◽  
Heat Supply System ◽  
Supply System ◽  
Heat Losses ◽  
Working Fluid ◽  
Heat Accumulator ◽  
District Heating System

The article is devoted to topical issues related to the storage, accumulation and transportation of heat by stationary and mobile heat storage. Analysis of the current state of the district heating system indicates significant heat losses at all stages of providing the consumer with heat. The use of heat storage in heat supply systems leads to balancing the heat supply system, namely, the peak load is reduced; heat production schedules are optimized by accumulating excess energy and using it during emergency outages; heat losses caused by uneven operation of thermal equipment during heat generation are reduced; the need for primary energy and fuel consumption is reduced, as well as the amount of harmful emissions into the environment. The main focus is on mobile thermal batteries (M-TES). The use of M-TES makes it possible to build a completely new discrete heat supply system without the traditional pipeline transport of the heat carrier. The defining parameters affecting the efficiency of the M-TES are the reliability and convenience of the design, the efficiency and volume of the “working fluid”, the operating temperature of the MTA recharging and the distance of transportation from the heat source to the consumer. The article contains examples of the implementation of mobile heat accumulators in the world and in Ukraine, their technical and technological characteristics, scope and degree of efficiency. The technical indicators of the implemented project for the creation of a mobile heat accumulator located in a 20-foot container and intended for transportation by any available means of transport are given.

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.

scholarly journals The development of the district heat supply system of the city of Karaganda

2019 ◽  
Vol 135 ◽  
pp. 01031
Author(s):  
Mereke Agilbayeva ◽  
Alexey Kalinin
Keyword(s):  
Heat Supply ◽  
District Heating ◽  
Heat Supply System ◽  
Heating System ◽  
Supply System ◽  
The State ◽  
District Heating System ◽  
Pipeline Networks ◽  
The City ◽  
Heat Loads

The district heating system of Karaganda (Kazakhstan) is considered in the article. The characteristics of the existing cogenerators and the state of the pipeline networks are given. Given the analysis of the existing state of the entire district heating of Karaganda. Proposed the program for the integrated development of the heat supply system bringing world experience in implementing the main development and modernization of heating networks. Shown the experience of reconstruction of heat supply facilities in the city of Karaganda within the framework of the state loan program “Nurly Zhol”. Based on the statistical data on the development of the city of Karaganda and its heat supply system the predicted heat loads are given until 2030. Due to the shortage of available heat capacity, options for the development of a centralized heat supply system in Karaganda are given and analyzed.

scholarly journals Improvement of methods of comprehensive assessment of the operation efficiency of centralized heat supply systems in municipal heat power engineering

2021 ◽  
Vol 2 (8 (110)) ◽  
pp. 16-22
Author(s):  
Igor Kozlov ◽  
Vyacheslav Kovalchuk ◽  
Oleksandr Klymchuk ◽  
Katerina Sova ◽  
Inna Aksyonova ◽  
...  
Keyword(s):  
Heat Supply ◽  
Boiler House ◽  
District Heating ◽  
Heat Supply System ◽  
Supply System ◽  
Comprehensive Assessment ◽  
Main Element ◽  
Heat Output ◽  
District Heating System ◽  
Overall Efficiency

The possibility of a comprehensive assessment of the efficiency of the operation of a district heating system based on the indicator of the overall efficiency of the equipment OEE (overall equipment efficiency) and its extension to the system as a whole is considered. The disunity of the direction of existing approaches in assessing the efficiency of operation of district heating systems does not allow a comprehensive assessment of the overall efficiency of the functioning of the technological sequence of the entire system. It is proposed to consider efficiency as the probability of full functioning of all elements of the heat supply system. It is shown that the heat output of the boiler house is proportional to the power consumption of the boiler house and is approximated by a periodic function. It is shown that the main element of the heat supply system, which determines its efficiency, is the heat-generating source. As a result of the study, it is determined that the efficiency of the heat-generating source functioning increases as the maximum value of its efficiency is reached. Numerical modeling has shown that the flexible use of the installed heat generator capacity contributes to an increase in the efficiency factor from 0.53 to 0.70 and the overall efficiency of the heat supply system can be increased by more than 30 %. When designing a boiler house, it was recommended to provide for the installation of capacities with gradation 1; 0.5; 0.25. It is shown that the OEE indicator allows one to characterize the efficiency of both the heat supply system as a whole and its individual components, and can be used in the design and analysis of the operation of systems

OS4-5 Study of Heat Supply System Using Distributed Heat Storage Unit for a Multiple Dwelling Houses

2007 ◽  
Vol 2007.12 (0) ◽  
pp. 181-182
Author(s):  
Hitoshi ASANO ◽  
Hikaru MORITA ◽  
Masato TANIMOTO ◽  
Yohei BABA ◽  
Yoshinori HISAZUMI ◽  
...  
Keyword(s):  
Heat Supply ◽  
Heat Storage ◽  
Heat Supply System ◽  
Supply System ◽  
Storage Unit

Effect of Operating Conditions on Water Injector of District Heating Supply System

2012 ◽  
Vol 152-154 ◽  
pp. 1041-1045
Author(s):  
Kun Zhang ◽  
Bo Zhang ◽  
Sheng Qiang Shen
Keyword(s):  
Pressure Loss ◽  
Heat Supply ◽  
District Heating ◽  
Heat Supply System ◽  
Area Ratio ◽  
Supply System ◽  
Operating Conditions ◽  
Operating Parameters ◽  
Fluid Temperature

The effect is discussed between operating parameters of District Heat Supply System and injector geometry by calculation. It is illustrated that heat supply load affects injector geometry worst, and suction fluid temperature has great impact on injector’s area ratio, while pressure loss of system offers no effects on diffuser geometry of injector.

EXPERIMENTAL STUDIES OF PARAMETERS ELEMENTS OF THE SOLAR HEAT SUPPLY SYSTEM

2020 ◽  
Vol 4 (1) ◽  
pp. 11-15
Author(s):  
D.V. BURKOV ◽  
E.V. BURKOVA
Keyword(s):  
Solar Collector ◽  
Heat Supply ◽  
Experimental Studies ◽  
Heat Supply System ◽  
Supply System ◽  
Heat Accumulator ◽  
Solar Heat ◽  
The Relationship

Experimental studies of solar heat supply system elements were carried out. Parameters describing the relationship between a heat accumulator and a solar collector are obtained.

scholarly journals Estimating the cost of heat generation and consumption in district heating systems

2021 ◽  
Vol 289 ◽  
pp. 02003
Author(s):  
Oleg Khamisov ◽  
Andrey Penkovskii ◽  
Angelica Kravets
Keyword(s):  
Heat Generation ◽  
Heat Supply ◽  
Lagrange Function ◽  
District Heating ◽  
Heat Supply System ◽  
Supply System ◽  
Efficient Operation ◽  
Marginal Prices ◽  
Nodal Prices ◽  
The Cost

The pricing of thermal energy is an important component of the efficient operation of the heat supply system. The article deals with the calculation of the cost of heat for consumers and producers of heat as based on the optimization problem of operation modes of the heat supply system with its further reduction to the conditions of optimality. The latter is to be achieved on the basis of the Lagrange function, with undetermined Lagrange multipliers obtained in the calculation process to be interpreted as nodal (marginal) prices of heat. This approach allows one to determine the pricing at each node. Based on the calculation of nodal prices of heat we determine the cost of heat transportation. Backed by the methodological tools developed, we have performed a demonstration of the calculation of nodal prices of heat and developed an algorithm for calculation of nodal prices of heat generation and consumption and overall technical and economic performance indicators of the heat supply system.

scholarly journals Performance Efficiency of an Energy-Saving Mini Dryer with a Combined Heat Supply System

2018 ◽  
Vol 12 (6) ◽  
pp. 9-14
Author(s):  
Umudvar R. Gasanov ◽  
Sevil A. Magerramova
Keyword(s):  
Energy Saving ◽  
Heat Supply ◽  
Heat Storage ◽  
Heating Surface ◽  
Heat Supply System ◽  
Supply System ◽  
Convective Drying ◽  
Drying Methods ◽  
Drying Process ◽  
Grain Drying

Abstract. The paper presents the description and operating principle of energy-saving mini-grain dryers for drying small grain batches on farms using conductive and convective drying methods and the process of grain cooling with heat obtained from a traditional heat source and a heat carrier prepared with a solar collector or a charged heat storage. (Research purpose) To develop and study a compact energy-saving grain dryer, with a heat supply system based on both a traditional source and a heat transfer fluid heated by a solar collector or a charged heat storage. (Materials and methods) The authors have carried out experimental studies of the drying process of wheat grain to determine the effectiveness of the developed unit for grain drying; the main condition for saving energy has been taken as the minimization of the total unit cost of the evaporation of one kilogram of moisture. (Results and discussion) The authors have conducted a two-factor experiment to determine the main optimal parameters affecting the grain drying process - the speed of grain movement in the conductive chamber and the temperature of the heating surface of its casing based on the calculated mathematical model. In the first variant, the drying process was carried out only by the conductive method using the heat from a traditional energy source. In the second variant, the drying was carried out by successive use of conductive and convective methods, and the grain was cooled using both thermal energy received from a traditional source and solar radiation heat along with the heat of the spent heat carrier. (Conclusions) The study has revealed that the most effective option in terms of saving thermal energy is grain drying with the consistent use of conductive and convective drying methods followed by grain cooling. The heat supply of the drying unit was partially carried out by using the heat of solar radiation and the heat obtained from the spent coolant recycling. In this optimal variant, the heat consumption for evaporation of one kilogram of moisture from the grain is minimal and amounts to 1.53-2.50 MJ per kilogram with a grain movement speed of in the dryer of 0.007-0.011 m per second and a heating surface temperature of 85-91 degrees Celsius.

Development of Single Loop Heat Supply System for Local Community Cogeneration: Prototype Test of a Heat Supply Unit With Heat Storage and Tap Water Preheating by Heat Pump Unit

2005 ◽  
Author(s):  
Hitoshi Asano ◽  
Terushige Fujii ◽  
Yoshinori Hisazumi ◽  
Toshihiro Hori ◽  
Tetsuo Abiko
Keyword(s):  
Heat Pump ◽  
Management System ◽  
Heat Supply ◽  
Local Community ◽  
Heat Storage ◽  
Tap Water ◽  
Heat Supply System ◽  
Supply System ◽  
Hot Water ◽  
Single Loop

In order for economically viable distributed generation systems for local community to spread, it is essential to develop an efficient and low-cost heat supply system. We propose a new heat supply system called DREAMS (Distributed Residential Energy with Advanced Management System). The key technology for the system is to connect compact heat supply units installed in all the households of the local community, such as a condominium, by a single loop of hot water piping. Two methods to decrease the heat supply rate through the single loop are proposed in this paper. The one is an utilization of a compact heat supply unit with heat storage in each house. The momentary heat demand can be covered by the heat storage. The other is a tap water preheating. A new CO2 regenerative heat pump cycle was proposed for the recover of the low temperature heat from the generator. A new heat supply unit with a practical capacity was manufactured, and the heat supply performance was evaluated by some experiments. Furthermore, an advanced energy management system has been under consideration to realize the effective system operation by utilizing IT. In this paper, experimental results on the performance of the new heat supply unit, the new CO2 heat pump system and evaluation of the energy-saving effect of our DREAMS are presented.

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