scholarly journals Application of renewable energy resources in buildings

2020 ◽  
Author(s):  
Njegoš Dragović ◽  
◽  
Milovan Vuković ◽  
Igor Urošević ◽  
◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Energy Savings ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Renewable Energy Resources ◽  
Living Space ◽  
Current State ◽  
Green Materials ◽  
Under Construction

The structure of the facilities under construction must be designed to be energy efficient. The contribution of each residential or business, production and storage facility must be viewed in the context of energy savings and transformation through a centralized system. Renewable energy sources (RES) make a significant contribution to energy efficiency in buildings, which can be combined with each other and through huge transformations from thermal to electricity, achieve huge savings. in addition to savings and efficiency, RES also affect the construction of facilities that fit into the living space and compensate for the modalities of heating-cooling-transformation-storage-sale of excess energy The paper analyzes the current state of licensing, design and construction of facilities, as well as the issuance of use permits with reference to the installation of "green" materials and the creation of an appropriate atmosphere that supports renew-able energy sources and energy efficiency.

Study on Energy Efficiency and Flexibility in Machinery and Production

2017 ◽  
Vol 871 ◽  
pp. 103-114 ◽  
Author(s):  
Martin Brugger ◽  
Georg Götz ◽  
Christoph Richter ◽  
Gunther Reinhart
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Energy Efficient ◽  
Energy Supply ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Energy Costs ◽  
Current State ◽  
Green Production ◽  
Research Action

Increasing energy costs, the change from conventional to renewable energy sources and the growing awareness of green production, especially in Germany, are crucial challenges for society and for industry. Renewable energy sources, especially solar and wind power, lead to a limited and volatile energy supply. Therefore, energy is no longer a resource which is available and ready on demand in the future. This change in energy supply hugely influences the production and industrial processes and is leading to alternative forms of production. There are high potentials in terms of energy efficiency and energy flexibility to master the described challenges. This paper presents an overview of the current state of the art in energy efficient and, especially, energy flexible production. The focus is on new aspects caused by the changes in production processes. Furthermore, research action fields concerning the energy flexibility of production machines are shown and explained through a practical example.

scholarly journals Scalable Multiport Converter Structure for Easy Grid Integration of Alternate Energy Sources for Generation of Isolated Voltage Sources for MMC

Electronics ◽  
2021 ◽  
Vol 10 (15) ◽  
pp. 1779
Author(s):  
Syed Rahman ◽  
Irfan Khan ◽  
Khaliqur Rahman ◽  
Sattam Al Otaibi ◽  
Hend I. Alkhammash ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Renewable Energy Sources ◽  
Energy Resources ◽  
Energy Sources ◽  
Renewable Energy Resources ◽  
Component Level ◽  
Storage Devices ◽  
Multiport Converter ◽  
Detailed Simulation ◽  
The Individual

This paper presents a novel, scalable, and modular multiport power electronic topology for the integration of multiple resources. This converter is not only scalable in terms of the integration of multiple renewable energy resources (RES) and storage devices (SDs) but is also scalable in terms of output ports. Multiple dc outputs of a converter are designed to serve as input to the stacking modules (SMs) of the modular multilevel converter (MMC). The proposed multiport converter is bidirectional in nature and superior in terms of functionality in a way that a modular universal converter is responsible for the integration of multiple RES/SDs and regulates multiple dc output ports for SMs of MMC. All input ports can be easily integrated (and controlled), and output ports also can be controlled independently in response to any load variations. An isolated active half-bridge converter with multiple secondaries acts as a central hub for power processing with multiple renewable energy resources that are integrated at the primary side. To verify the proposed converter, a detailed design of the converter-based system is presented along with the proposed control algorithm for managing power on the individual component level. Additionally, different modes of power management (emulating the availability/variability of renewable energy sources (RES)) are exhibited and analyzed here. Finally, detailed simulation results are presented in detail for the validation of the proposed concepts and design process.

scholarly journals PERSPECTIVES OF USING ALTERNATIVE ENERGY SOURCES IN UKRAINE IN THE CONTEXT OF INCREASING ENERGY EFFICIENCY IN EUROPE

10.23856/2705 ◽  
2018 ◽  
Vol 27 (2) ◽  
pp. 44-51
Author(s):  
Lidiya Shergina ◽  
Alla Zhemba ◽  
Nataliia Revutska ◽  
Yulia Burma
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Alternative Energy ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Alternative Energy Sources ◽  
Energy Efficiency Improvement ◽  
Energy Independence ◽  
Ecological Type ◽  
Global Energy Consumption

The article is devoted to the issues of the functioning and development of energy in each country, caused mainly by the economic expediency of renewable energy and the requirements of energy independence. Also, the article examines the importance of replacing traditional fuels with alternative energy sources. The international experience of the countries in the field of efficient use of available natural resources of the fuel and energy complex and enhancement of the potential of the energy sector have been analyzed. A number of common characteristics and directions of energy efficiency improvement for European countries are highlighted. Alternative types of energy and measures necessary for their implementation have been offered. The potential resources of renewable energy sources have been analyzed. The article is devoted to the use of economical and ecological type of fuel - biofuel for Ukraine. On the basis of the analysis of the situation on the energy market, renewable energy is examine, which plays a compensatory role in global energy consumption in the conditions of growing exhaustion of non-renewable sources.

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.

scholarly journals Energy Efficiency – Indoor Air Quality Dilemma in Educational Buildings: A Possible Solution

2020 ◽  
Vol 24 (1) ◽  
pp. 357-367
Author(s):  
Liva Asere ◽  
Andra Blumberga
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Pv System ◽  
Educational Buildings ◽  
Electricity Tariff

AbstractThe energy efficiency – indoor air quality dilemma is well known and the main drawback to operate the mechanical ventilation is electricity costs as concluded from previous studies. Educational buildings are one of the places where future taxpayers spend a lot of time. This paper aims to study an alternative solution on how to reduce energy efficiency – indoor air quality dilemma in educational buildings by adopting systems that use renewable energy sources. A typical education building in Latvia is taken as a case study by changing it from a consumer to prosumer. This building type has a specific electricity usage profile that makes the choice of photovoltaics (PV) power quite challenging so the various power options have been analysed and used for an electricity solution. Also, the more decentralised preference is chosen – disconnect from a public heating provider and using a local system with a pellet boiler. Educational buildings using PV can reduce the electricity tariff, but the payback periods are still not very satisfactory without subsidies. The average electricity tariff per month varies between scenarios and the best one is for the scenario with 30 kW installed power. The educational building partly using 16 kW PV system reduces not only its bill for electricity but also reduces CO2 emissions by around 36 tons. The education buildings as energy prosumers using renewable energy sources are reducing GHG emissions by having high indoor air quality.

scholarly journals Energy benchmarking in educational buildings in the city of Kragujevac - possibilities for energy efficiency improvement

2021 ◽  
Vol 18 (1) ◽  
pp. 95-114
Author(s):  
Ana Radojevic ◽  
Danijela Nikolic ◽  
Jasna Radulovic ◽  
Jasmina Skerlic
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Energy Consumption ◽  
Co2 Emissions ◽  
Renewable Energy Sources ◽  
Electricity Consumption ◽  
Energy Sources ◽  
Efficiency Improvement ◽  
Energy Efficiency Improvement ◽  
Energy Benchmarking

The implementation of energy efficiency measures and use of renewable energy sources in educational buildings can significantly contribute to reducing energy consumption, but also to CO2 emissions in the entire public sector. The paper shows the comparison of energy consumption indicators for 61 elementary school buildings which have previously been divided in 12 groups, according to the period of construction and size, based on the national typology called TABULA, as the first step of further study on how to use the renewable energy sources. The aim of this paper is to use the energy benchmarking process to select representative facilities which are suitable for applying renewable energy sources, for their further energy efficiency improvement. Indicators of annual specific electricity consumption and CO2 emissions per unit area [kWh/m2] and per user [kWh/user] were calculated. After that, from two groups (in which the highest electricity consumption and CO2 emissions are 68.37% and 74.53% of the total consumption/ emissions), one representative facility was selected.

scholarly journals Refurbishment of a house in a historical building: energy saving, electrification and flexibility

2020 ◽  
Vol 197 ◽  
pp. 02010
Author(s):  
Giada Romano ◽  
Elisa Pennacchia ◽  
Sofia Agostinelli
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Energy Saving ◽  
Renewable Energy Sources ◽  
Energy Performance ◽  
Building Envelope ◽  
Energy Sources ◽  
Automation Systems ◽  
Architectural Constraints ◽  
Current Energy

Buildings with architectural constraints and recognized historical values require a careful design process, aiming to combine the needs of conservation and the adaptation of the buildings to the modern use and its accessibility. The feasible interventions consist in improving the energy performance of the building envelope, in inserting efficient technological systems and using renewable energy sources where possible. The compatibility between the architectural constraints of the building and its more sustainable future use represents a crucial challenge. This work presents the interventions designed and realized on a small villa located in the Prati district, in Rome. Starting from the requests of the client, the primary objective was to create a comfortable house both in the winter and in the summer season, with widespread use of automation systems for managing the utilities. In line with the current energy scenario, the interventions were oriented to energy efficiency, the reduction of polluting emissions, the electrification of utilities and the use of renewable energy sources. The proposed solutions showed high gains in terms of energy saving even if the changes to the building envelope were limited by the desire to preserve the values of the cultural heritage. Therefore, a virtuous refurbishment can effectively respond to current energy efficiency goals.

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