scholarly journals Analysis Of Scientific Research On The Use Of Renewable Energy Sources In The Heat Supply System

2021 ◽  
Vol 03 (04) ◽  
pp. 264-274
Author(s):  
Sardor Ilkhomovich Khamraev ◽  
◽  
Saydulla Mirzaevich Khuzhakulov ◽  
Behzodjon Ilkhomovich Kamolov ◽  
Shakhboz Khairulla Oglu Khusunov ◽  
...  
Keyword(s):  
Solar Energy ◽  
Heat Supply ◽  
Residential Buildings ◽  
Renewable Energy Sources ◽  
Scientific Research ◽  
Heat Supply System ◽  
Climatic Conditions ◽  
Energy Potential ◽  
Foreign Countries ◽  
Supply Systems

The article analyzes the results of research conducted by scientists from foreign countries and schools of Uzbekistan on the use of solar energy in the heating systems of residential buildings and sectors of the economy. As a result of a brief analysis of scientific research, it is stated that there are problems with combined heat supply systems operating on the basis of solar energy in natural conditions that are suitable for the climatic conditions and solar energy potential of the southern regions of the country.

scholarly journals A study of using solar energy to cure concrete bricks

2019 ◽  
Vol 97 ◽  
pp. 06041
Author(s):  
Bach Dinh Thien ◽  
Hoang Vinh Long
Keyword(s):  
Solar Energy ◽  
Renewable Energy Sources ◽  
Heat Supply System ◽  
Tidal Energy ◽  
Climatic Conditions ◽  
Saturated Steam ◽  
Ho Chi Minh City ◽  
Test Operation ◽  
Solar Thermal Collector ◽  
Temperature Measurement System

Use of renewable energy sources such as solar energy, wind energy, tidal energy, etc. are important solutions in the trend for sustainable development. The purpose of this research is to build tunnels using solar energy to cure concrete bricks at saturated steam condition. Heat supply system and temperature monitoring of the tunnels consists of three main parts: solar thermal collector to heat water, heat trapping structure, and temperature measurement system with internet connection. The test operation of tunnels in industrial scale was conducted at a factory in Ho Chi Minh City. The results show that it can achieve temperatures above 50°C met curing requirements of concrete bricks. This can confirm the feasibility to use solar energy curing concrete bricks in plants with areas corresponding climatic conditions.

scholarly journals IMPLEMENTATION OF A HYBRID INTERMITTENT HEAT SUPPLY SYSTEM FOR EDUCATIONAL INSTITUTIONS

2020 ◽  
Vol 4 ◽  
pp. 29-31
Author(s):  
Oleksandr Klymchuk ◽  
Lidiia Ivanova ◽  
Olena Bodiul
Keyword(s):  
Renewable Energy ◽  
Heat Supply ◽  
Renewable Energy Sources ◽  
Heat Supply System ◽  
Supply System ◽  
Educational Institutions ◽  
Energy Sources ◽  
Heat Sources ◽  
Public Buildings ◽  
Supply Systems

The experience of introducing a hybrid intermittent heating system for educational institutions is presented. The analysis of theoretical and experimental research, modern energy technologies for the integration of renewable energy sources into innovative and existing heat supply systems for buildings. The adaptation of modern developments of hybrid systems to buildings operating both in permanent and intermittent operation mode (administrative institutions, educational institutions and other public buildings) has been carried out. The conditions for increasing the efficiency of using heterogeneous renewable energy sources in combined heat supply systems have been established. For the proposed combined heat supply system, a hybrid heat generation is provided using low-potential renewable heat sources in the heat pump cycle and high-potential traditional heat sources in a pellet boiler. A mathematical model of the operating modes of a combined heat supply system using renewable heat sources is proposed, which can be used for numerical modeling of thermal processes in a variable heat supply mode for public buildings. The study of the dynamics of heating the premises when changing the climatic conditions of different regions of Ukraine, including the southern regions, is done. This makes it possible to analyze the efficiency of using alternative energy sources for heat supply and substantiate the conditions for including heat accumulators in the circuit. The research results are relevant because allow to achieve significant energy savings for heat supply of public buildings, characterized by a low level of energy efficiency. The proposed solutions indicate that the combined use of the capabilities of heterogeneous renewable energy sources can be effective only with a hybrid method of heat generation using a heat pump and a pellet boiler, taking into account the operating mode of buildings. As a result of theoretical and experimental studies, it was established: the dynamics of heating and cooling of premises with a high accumulation capacity; the share of replacement of the consumed thermal power in the hybrid use of heat generators. The conditions for the most effective use of heat accumulators in a combined heat supply system have been established. The results obtained make it possible to increase the efficiency of the use of renewable energy sources for public buildings, taking into account the mode of their operation, in which the heat supply system operates in an intermittent mode

scholarly journals ENERGY EFFICIENT SOLAR HEAT SUPPLY SYSTEMS FOR BUILDINGS AND STRUCTURES

2021 ◽  
Vol 2021 (1) ◽  
pp. 137-142
Author(s):  
Vasyl Zhelykh ◽  
◽  
Mariana Kasynets ◽  
Khrystyna Myroniuk ◽  
Uliana Marushchak ◽  
...  
Keyword(s):  
Solar Energy ◽  
Solar Collector ◽  
Heat Supply ◽  
Heat Supply System ◽  
Solar Collectors ◽  
Actual Problem ◽  
Solar Heat ◽  
Advantages And Disadvantages ◽  
Heat Supply Systems ◽  
Supply Systems

Today, the energy sector of Ukraine requires significant consumption of traditional energy sources (oil, gas, coal, nuclear energy). However, their use is associated with a number of difficulties, including thermal, chemical, and radioactive contamination of the environment and the exhaustion of their reserves. The paper is devoted to solving the actual problem of improving the efficiency of solar heat supply systems with solar collectors. An analysis of the potential of solar energy and existing solar heat supply systems is presented. The advantages and disadvantages of various solar collector designs and methods of their research are analyzed. The analysis of the main directions for improving the efficiency of solar collectors and solar heat supply systems, in general, is presented. An improved solar heat supply system with the proposed design of a solar collector is obtained and its temperature characteristics are established depending on the intensity of solar energy intake.

scholarly journals Determination of features of formation of energy supply systems with the use of renewable energy sources in the transition period

2021 ◽  
Vol 5 (8 (113)) ◽  
pp. 23-29
Author(s):  
Liliya Nakashydze ◽  
Volodimir Gabrinets ◽  
Yurii Mitikov ◽  
Sergey Alekseyenko ◽  
Iryna Liashenko
Keyword(s):  
Renewable Energy ◽  
Energy Supply ◽  
Transition Period ◽  
Residential Buildings ◽  
Renewable Energy Sources ◽  
Methodological Approach ◽  
Climatic Conditions ◽  
Energy Sources ◽  
Supply Systems ◽  
Energy Supply Systems

An urgent scientific and practical problem is the formation of energy efficient systems for ensuring climatic conditions in premises based on the use of renewable energy sources. The work has improved the technical and methodological approach to the calculations of energy supply and storage systems when using energy-active fences. The special effectiveness of these fences has been shown in the transitional periods of the year, that is, in spring and autumn. A mathematical model has been developed to reliably predict the process of ensuring temperature comfortable conditions (heat balance) when using nonparametric statistics methods. It will improve the quality of forecasting the effect of external air temperature during the transitional periods of the year. The temperature inside the room is taken into account in the presence of a multilayer energy-active fence. To determine the approach to the use of heat in energy supply systems during the transition period, thermal parameters from the inner and outer sides of the building structure are considered. This makes it possible to take into account changes in the heat transfer of these structures when designing a power supply system and determining the optimal modes of its functioning in various natural conditions. The function of energy-active fences associated with the generation of additional heat into the system, obtained through the conversion of solar radiation energy, is considered. To increase this generation, special multilayer designs of energy-active fencing have been proposed. The proposed thermal modernization with the use of energy-active fences allows, on average, over the cold period of the year, to reduce energy consumption by 3.5 times for industrial and residential buildings

scholarly journals Classification of the Energy Production Potential of Water Lens Solar Concentrators Using Machine Learning

2021 ◽  
Vol 2042 (1) ◽  
pp. 012022
Author(s):  
Hamidreza Zarrinkafsh ◽  
Nasim Eslamirad ◽  
Francesco De Luca
Keyword(s):  
Machine Learning ◽  
Solar Energy ◽  
Renewable Energy Sources ◽  
Confusion Matrix ◽  
Climatic Conditions ◽  
Assessment Process ◽  
Supervised Machine Learning ◽  
Energy Potential ◽  
Planning Stage

Abstract Assessing the potential of renewable energy sources for buildings in neighborhoods becomes a crucial task in the early planning stage. Integrating solar energy equipment into urban buildings poses many challenges, such as uncertainties and the complexity of urban built agglomeration. Due to the time-consuming solar energy potential assessment process and lack of knowledge of urban actors, a reliable framework is required to predict buildings’ solar energy potential. This research presents a comprehensive machine learning data processing framework to predict output energy of Water Lenses (WL) based on buildings specifications and relationship to the neighbourhood. The research used a raw dataset consisting of 7000 sample buildings in different situations by applying 12 years of climatic conditions in Tallinn, Estonia. The results were entered into a Supervised Machine Learning process and the Gaussian Naive Bayes technique was used for classification of building features to be implemented with solar systems. Finally, the process was measured by a confusion matrix that showed 80% accuracy of ML output predictions in the urban context.

Use of Natural Ventilation in Malaysia's Future Green Housing

2014 ◽  
Vol 935 ◽  
pp. 316-319
Author(s):  
Alireza Gharakhani ◽  
Eka Sediadi ◽  
Tareef Hayat Khan ◽  
Hadi Bagheri Sabzevar
Keyword(s):  
Solar Energy ◽  
Natural Ventilation ◽  
Residential Buildings ◽  
Renewable Energy Sources ◽  
Ventilation System ◽  
Electricity Consumption ◽  
Green Building ◽  
Climatic Conditions ◽  
Simulation Software ◽  
Asia Pacific

Within the Asia Pacific region, Malaysias WAWASAN 2020 creates the vision of being a green country. Accordingly, the Malaysian Government has established the mission of reducing the carbon emission. The programs include the projects targeting the energy efficiency and saving within the housing and residential buildings that must meet the Green Building criteria to achieve the sustainable architectural design. Renewable energy sources, like wind or solar energy, can be used to ventilate. The review of previous researchers shows that the use of the natural ventilation system decreases the electricity consumption of a simulated housing in the hot and humid climatic conditions such as Malaysia. The purpose of this research is a review of consumes renewable energies such as solar energy and wind for passive cooling. To test the benefit of natural ventilation system, this paper reviewed some analysis that had used simulation software such as CFD.

scholarly journals Energy efficiency and ecological quality of buildings by process control of heat supply systems

2018 ◽  
Vol 251 ◽  
pp. 03052 ◽  
Author(s):  
Andrey Benuzh ◽  
Sergey Fedorov ◽  
Ekaterina Orenburova
Keyword(s):  
Process Control ◽  
Heat Supply ◽  
Heat Supply System ◽  
Heat Transfer Fluid ◽  
Industrial Buildings ◽  
Operation Algorithm ◽  
And Control ◽  
Supply Systems ◽  
Continuous Heat

The article presents special characteristics of mathematical modeling of the process control a resource efficient heat supply system of industrial buildings and facilities, where constant temperature maintenance is especially critical for the process. A functional diagram of the operation of the continuous heat supply process is provided. The dependence of temperature at the point of heat-transfer fluid mixing on environmental is analyzed and control system operation algorithm is proposed.

RENEWABLE ENERGY INTEGRATION FOR HOT WATER SUPPLY AND HEATING OF BUILDINGS

2021 ◽  
pp. 3-12
Author(s):  
Yu. Selikhov ◽  
K. Gorbunov ◽  
V. Stasov
Keyword(s):  
Solar Energy ◽  
Heat Production ◽  
Heat Supply ◽  
Alternative Energy ◽  
Fossil Fuel ◽  
Heat Pumps ◽  
Climatic Conditions ◽  
Economic Feasibility ◽  
Hot Water ◽  
The Cost

Solar energy is widely used in solar systems, where economy and ecology are combined. Namely, this represents an important moment in the era of depletion of energy resources. The use of solar energy is a promising economical item for all countries of the world, meeting their interests also in terms of energy independence, thanks to which it is confidently gaining a stable position in the global energy sector. The cost of heat obtained through the use of solar installations largely depends on the radiation and climatic conditions of the area where the solar installation is used. The climatic conditions of our country, especially the south, make it possible to use the energy of the Sun to cover a significant part of the need for heat. A decrease in the reserves of fossil fuel and its rise in price have led to the development of optimal technical solutions, efficiency and economic feasibility of using solar installations. And today this is no longer an idle curiosity, but a conscious desire of homeowners to save not only their financial budget, but also health, which is possible only with the use of alternative energy sources, such as: double-circuit solar installations, geothermal heat pumps (HP), wind power generators. The problem is especially acute in the heat supply of housing and communal services (HCS), where the cost of fuel for heat production is several times higher than the cost of electricity. The main disadvantages of centralized heat supply sources are low energy, economic and environmental efficiency. And high transport tariffs for the delivery of energy carriers and frequent accidents on heating mains exacerbate the negative factors inherent in traditional district heating. One of the most effective energy-saving methods that make it possible to save fossil fuel, reduce environmental pollution, and meet the needs of consumers in process heat is the use of heat pump technologies for heat production.

scholarly journals TECHNO-ECONOMIC ANALYSIS OF AN OFF-GRID HYBRID ENERGY SYSTEM WITH HOMER PRO

2021 ◽  
Vol 5 (3) ◽  
pp. 56-61
Author(s):  
Ahmet Erhan AKAN
Keyword(s):  
Renewable Energy ◽  
Solar Energy ◽  
Economic Analysis ◽  
Energy Conversion ◽  
Renewable Energy Sources ◽  
Lithium Ion ◽  
Energy Sources ◽  
Renewable Energy Resources ◽  
Energy Potential ◽  
Economic Point

The decrease in fossil-based energy sources and increasing environmental problems increase the tendency to renewable energy sources day by day. The potential of renewable energy sources differs according to the region where the energy will be produced. For this reason, it is crucial to conduct a good feasibility study that deals with the selected systems from a technical and economic point of view before making an investment decision on energy conversion systems based on renewable energy sources. In this study, the most suitable equipment and capacities were investigated by examining the techno-economic analysis of a hybrid system created with wind-solar renewable energies for a detached house, which is considered off-grid, in a rural area of Tekirdağ province (40o58.7ı N, 27o30.7ı E). Investigations were carried out using the HOMER Pro (Hybrid Optimization Model for Electric Renewable) program. The wind and solar energy potential of Tekirdağ province were obtained from the NASA renewable energy resources database added to the HOMER Pro program. The daily electricity requirement of the sample house was chosen as 11.27 kWh, and the current peak electrical load was chosen as 2.39 kW. A wind turbine is connected to the AC busbars, solar collectors and battery group connected to the DC busbars, and a converter that converts energy between AC and DC busbars in the energy conversion system. In order to determine the optimum capacities of the system elements, 27486 different simulations were performed by HOMER Pro. The selection of the most suitable system among these was determined according to the lowest net present cost (NPC) value. In addition, the energy production capacities that will occur in the case of different wind speeds were also investigated. Accordingly, the system to be installed with a solar panel with a capacity of 6.25 kW, PV-MPPT with a capacity of 1 kW, 2 wind turbines with a capacity of 1 kW, 8 Lithium-ion batteries with a capacity of 6V-167 Ah, and a converter with a capacity of 2.5 kW has been determined will generate electrical energy of 5433 kWh per year. In addition, it has been determined that 61.8% of this produced energy will be obtained from solar energy and 38.2% from wind energy, and the simple payback period of the investment will be 14 years. It is thought that this study will provide valuable information to researchers and investors.

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