scholarly journals An analysis of the power demand and electricity consumption of automatic pellet boiler

2018 ◽  
Vol 2 (21) ◽  
pp. 117-129
Author(s):  
Grzegorz Pełka ◽  
Wojciech Luboń ◽  
Daniel Malik
Keyword(s):  
Energy Consumption ◽  
Renewable Energy Sources ◽  
Electricity Consumption ◽  
Power Demand ◽  
Heating Season ◽  
Total Energy Consumption ◽  
Operating Modes ◽  
Constant Control ◽  
First Case ◽  
Additional Costs

Pellet boilers are increasingly popular on the market, largely due to the fact that their use does not demand constant control by the user, but is reduced only to replenishing fuel and cleaning the combustion chamber and heat exchanger every few days. However, this functionality creates additional costs in terms of power consumption due to the work of boiler components, such as the pellet igniter, screw conveyors motors, fan, pump and controller. The purpose of this research was the analysis of the power demand and energy consumption of the electricity devices installed on the automatic pellet boiler in two operating modes, determining the total energy consumption and costs of electricity due to heating seasons in each mode. In the first mode, the boiler worked with modulated power, and in the second the boiler was working with nominal power. To carry out the mentioned research, a pellet boiler installed in the AGH UST Laboratory of Renewable Energy Sources in Miękinia was used. All the data obtained was used to simulate the total electricity consumption during one standard heating season and the costs involved. In the first case the boiler consumed 623,195 kWh of electricity per heating season and in the second the boiler consumed 304,503 kWh electricity per heating season. Although electricity consumption in the modulated mode is higher, the total cost of heating is lower, due to lower fuel consumption.

scholarly journals Analysis of Energy System in Norway with Focus on Energy Consumption Prediction

2017 ◽  
Vol 9 (1) ◽  
pp. 5-14 ◽  
Author(s):  
Maryam Hamlehdar ◽  
Alireza Aslani
Keyword(s):  
Energy Consumption ◽  
Energy Demand ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Electricity Consumption ◽  
Energy System ◽  
High Energy ◽  
Regression Result ◽  
Industry Growth ◽  
The Status

Abstract Today, the fossil fuels have dominant share of energy supply in order to respond to the high energy demand in the world. Norway is one of the countries with rich sources of fossil fuels and renewable energy sources. The current work is to investigate on the status of energy demand in Norway. First, energy and electricity consumption in various sectors, including industrial, residential are calculated. Then, energy demand in Norway is forecasted by using available tools. After that, the relationship between energy consumption in Norway with Basic economics parameters such as GDP, population and industry growth rate has determined by using linear regression model. Finally, the regression result shows a low correlation between variables.

scholarly journals Utilization of Renewable Energy Sources in Road Transport in EU Countries—TOPSIS Results

Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7457
Author(s):  
Joanna Kisielińska ◽  
Monika Roman ◽  
Piotr Pietrzak ◽  
Michał Roman ◽  
Katarzyna Łukasiewicz ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Renewable Energy Sources ◽  
Road Transport ◽  
Energy Sources ◽  
Topsis Method ◽  
Total Energy Consumption ◽  
Eu Countries ◽  
Relative Closeness ◽  
The Status

The primary aim of this study was to assess and compare EU countries in terms of the use of renewable energy sources in road transport. The following research tasks were undertaken to realize this aim: (1) a review of the literature concerning the negative externalities in road transport, the concept of sustainable development, and legal regulations referring to the utilization of renewable energy sources; (2) presentation of changes in energy consumption (both traditional and renewable) in road transport in EU countries in the years 2008–2019; and (3) identification of leaders among the EU countries in terms of consumption of renewable energy sources in road transport. The aim and tasks were realized using the literature review and TOPSIS method as well as descriptive, tabular, and graphic methods. The analysis was conducted for 28 EU countries according to the status for 2019. The period of 2008–2019 was investigated. Sources of materials included literature on the subject and Eurostat data. Although renewable energy sources accounted for as little as 6% of total energy consumption in road transport in EU countries in 2019, this is a significant topical issue. It results from the direction in which changes need to be implemented in terms of energy generation in this area of human activity. It turned out that blended biodiesel and blended biogasoline were the most commonly used fuels originating from renewable sources. The application of the TOPSIS method resulted in the identification of five groups of EU member countries, which differed in terms of the degree of utilization of renewable energy sources in road transport. Luxemburg, Sweden, and Austria were leaders in this respect. In turn, Malta, Estonia, and Croatia were characterized by very low consumption of renewable energy. The greatest progress in the utilization of renewable energy sources in road transport was recorded in Sweden, Finland, and Bulgaria (changes in the relative closeness to the ideal solution from 0.15 to 0.27), while the greatest reduction in relation to other countries was observed in Austria, Germany, and Lithuania (changes from −0.35 to −0.22).

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 IMPACT OF MODAL CHOICE IN ENERGY CONSUMPTION AND CARBON DIOXIDE EMISSIONS: ANALYSIS OF BRAZILIAN BIOETHANOL SUPPLY CHAIN

2016 ◽  
Vol 13 (2) ◽  
pp. 138 ◽  
Author(s):  
Juliana Monteiro Lopes ◽  
Ilton Curty Leal Junior ◽  
Vanessa De Almeida Guimarães
Keyword(s):  
Supply Chain ◽  
Renewable Energy ◽  
Life Cycle ◽  
Energy Consumption ◽  
Carbon Dioxide Emissions ◽  
Energy Use ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Total Energy Consumption ◽  
South Central

Currently, concerns with sustainable development lead organizations to improve their production processes in order to reduce greenhouse gases emission and energy consumption. Since the bioethanol supply chain is a CO2 emitter and depends on several energy sources, it becomes important to analyze how to improve this chain regarding environmental issues. Thus, this paper presents a comparative study of scenarios with bioethanol supply chain configurations which use different modal alternatives and renewable energy in all its mid-stages. The analysis was based on LCA (life cycle analysis) concepts and in a partial application of LCI (life cycle inventory), so that we can identify which of these scenarios is most appropriate in terms of lower total energy consumption, greater share of renewable energy use and lower CO2 emissions. Based on concepts found in the bibliographic research, the methodology used and the data collected from documental research, this paper analyzes the supply chain that begins with sugarcane plantation and bioethanol production in the south central region of Brazil with destination to export. Based on the results, we concluded that it is possible to improve the performance of the supply chain in environmental terms with a combination of renewable energy sources and modes of transport that are more suitable to the product studied.

scholarly journals Prospects for the use of solar energy in the Irkutsk Region and the Republic of Buryatia

2021 ◽  
Vol 289 ◽  
pp. 05002
Author(s):  
О.S. Kuznetsova ◽  
V.V. Khanaev
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Electricity Consumption ◽  
Electrical Energy ◽  
Energy Sources ◽  
Irkutsk Region ◽  
The Republic ◽  
Distribution Generation

Due to the ever-increasing volume of energy consumption, the number of power plants capable of generating the necessary amount of electrical energy inevitably increases. The development and construction of new renewable energy sources and distribution generation facilities, the increase in electricity consumption and the growth of the tariff stimulates the search for effective technological solutions. Also in connection with the increasing popularity and improvement of technologies, there is a natural need to assess the prospects and potential opportunities of SES in the region as a whole, and for the Irkutsk region and the Republic of Buryatia, in particular.

scholarly journals The influence of design features of housing facilities on energy consumption

2020 ◽  
Vol 175 ◽  
pp. 11019
Author(s):  
Sergei Kolodyazhniy ◽  
Valeriy Mishchenko ◽  
Elena Gorbaneva ◽  
Kristina Sevryukova
Keyword(s):  
Energy Consumption ◽  
Residential Buildings ◽  
Structural Characteristics ◽  
Electricity Consumption ◽  
End User ◽  
Total Energy Consumption ◽  
Apartment Buildings ◽  
Energy Models ◽  
Actual Energy Consumption ◽  
The Impact

This article analyzed the impact of the structural characteristics of old apartment buildings on actual energy consumption. The authors reviewed energy consumption in existing apartment buildings in Voronezh in order to determine the need for major repairs and energy efficiency. For this purpose, a comparative analysis of energy consumption in old apartment buildings and in new ones built in accordance with the current regulations was carried out. Three indicators of energy consumption were considered for analysis: total energy consumption by the end-user, heating of premises and electricity consumption depending on the year of construction of apartment buildings. The characteristics considered were used to quantify energy consumption (heating and power supply). Due to the results obtained, a statistical analysis of energy consumption in old apartment buildings and in new ones was carried out. It was noted that old apartment buildings consume more energy than those built at a late stage, in accordance with the current regulatory framework. The results can be useful in identifying priority elements of the building that will help to effectively reduce energy consumption during major repairs and classify existing residential buildings to build energy models.

scholarly journals Improving building energy modelling by applying advanced 3D surveying techniques on agri-food facilities

2017 ◽  
Vol 48 ◽  
Author(s):  
Francesco Barreca ◽  
Giuseppe Modica ◽  
Salvatore Di Fazio ◽  
Viviana Tirella ◽  
Raimondo Tripodi ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Total Energy ◽  
Performance Assessment ◽  
Food Processing ◽  
Food Industry ◽  
Renewable Energy Sources ◽  
Energy Performance ◽  
Geometric Modelling ◽  
Total Energy Consumption ◽  
Thermophysical Model

Food industry is the production sector with the highest energy consumption. In Europe, the energy used to produce food accounts for 26% of total energy consumption. Over 28% is used in industrial processes. Recently, European food companies have increased their efforts to make their production processes more sustainable, also by giving preference to the use of renewable energy sources. In Italy, the total energy consumption in agriculture and food sectors decreased between 2013 and 2014, passing from 16.79 to 13.3 Mtep. Since energy consumption in food industry is nearly twice the one in agriculture (8.57 and 4.73 Mtep, respectively), it is very important to improve energy efficiency and use green technologies in all the phases of food processing and conservation. In Italy, a recent law (Legislative Decree 102, 04/07/2014) has made energy-use diagnosis compulsory for all industrial concerns, particularly for those showing high consumption levels. In the case of food industry buildings, energy is mainly used for indoor microclimate control, which is needed to ensure workers’ wellbeing and the most favourable conditions for food processing and conservation. To this end, it is important to have tools and methods allowing for easy, rapid and precise energy performance assessment of agri-food buildings. The accuracy of the results obtainable from the currently available computational models depends on the grade of detail and information used in constructional and geometric modelling. Moreover, this phase is probably the most critical and time-consuming in the energy diagnosis. In this context, fine surveying and advanced 3D geometric modelling procedures can facilitate building modelling and allow technicians and professionals in the agri-food sector to use highly efficient and accurate energy analysis and evaluation models. This paper proposes a dedicated model for energy performance assessment in agri-food buildings. It also shows that using advanced surveying techniques, such as a terrestrial laser scanner and an infrared camera, it is possible to create a three-dimensional parametric model, while, thanks to the heat flow meter Accepted paper measurement method, it is also possible to obtain a thermophysical model. This model allows assessing the energy performance of agri-food buildings in order to improve the indoor microclimate control and the conditions of food processing and conservation.

The Effective Use of Renewable Energy Sources and Advanced Technology of Environment Systems in Public Buildings

2013 ◽  
Vol 361-363 ◽  
pp. 382-385
Author(s):  
Marek Kušnír ◽  
Danica Košičanová ◽  
František Vranay
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Cooling System ◽  
Renewable Energy Sources ◽  
Electric Energy ◽  
Heating System ◽  
Photovoltaic System ◽  
Advanced Technology ◽  
Energy Sources ◽  
Total Energy Consumption

Nowadays, choosing of heating source is emphasized. On the market there are different types of heat sources, which need to be properly designed to the required heating output. Finally, it is necessary to take into account the possibilities of fuel burning as well as heat transfer substance. Heating system is dependent on regional weather conditions, where the building is located. All these factors ultimately, with proper design of the heat source, could reduce operating costs in the heating season. Currently in the design of the heating system, there are taken into account the greatest possible energy savings. It is therefore to encourage bigger utilization of renewable energy sources.Currently has the highest proportion of total energy consumption in the buildings, energy for heating. For this reason, the expert and research community seeks to reduce energy consumption at the lowest possible value. For this purpose, people are starting to apply renewable energy sources. These devices using renewable energy sources convert energy from the environment. Most of them are transforming energy from the sun, earth, water and air. This energy is then used directly for heating. In this article we will more closely deal with transforming solar energy into electricity using photovoltaic panels and we will focus on the interaction between the photovoltaic system and heating and cooling system, under certain conditions. Produced electric energy is used for heating system in the school building in Spišská Nová Ves in Slovakia.

scholarly journals Direct energy consumption and CO2 emissions in a Finnish broiler house – a case study

2015 ◽  
Vol 24 (1) ◽  
pp. 10-23 ◽  
Author(s):  
Mari Rajaniemi ◽  
Jukka Ahokas
Keyword(s):  
Energy Consumption ◽  
Co2 Emissions ◽  
Energy Savings ◽  
Electricity Consumption ◽  
Carcass Weight ◽  
Total Energy Consumption ◽  
Energy Saving Potential ◽  
Feed Production ◽  
Direct Energy ◽  
Broiler House

Direct energy (electricity and heating) consumption was measured from one broiler house in southern Finland. CO2 emissions were also calculated. Six broiler flocks were reared per year with an average of 26 000 birds per flock. Heating constituted the major energy input, averaging 1.3 kWh kg-1 of carcass weight. It varied greatly between seasons and was highest during the cold period. Using renewable energy for heating remarkably reduces CO2 emissions compared to fossil energy. Electricity consumption averaged 0.08 kWh kg-1 of carcass weight. The greatest energy saving potential can be found in heating. CO2 emissions can be lowered to similar levels as in warmer countries by using biofuels for heating. Ventilation control is one possibility for direct energy savings in broiler production. Feed production is one of the key elements when total energy consumption is considered.

Рациональное использование свободного напора

2020 ◽  
Author(s):  
E. Rozhnov
Keyword(s):  
Energy Consumption ◽  
Total Energy ◽  
Water Distribution ◽  
Pressure Control ◽  
Total Energy Consumption ◽  
Initial Water ◽  
Operating Modes ◽  
Pumping Stations ◽  
Two Stages ◽  
The City

Линейная удаленность объектов в г. Новокузнецке достигает 40 км с разницей высотных отметок 157 м. Два главных водозабора города удалены друг от друга на расстояние 20 км, что предполагает наличие зон с разным свободным напором. Управление давлением и распределение воды по районам традиционно осуществлялось дросселированием запорной арматурой, а в исходной схеме водоснабжения функционировали 119 насосных станций с агрегатами мощностью от 0,75 до 1250 кВт. По результатам анализа возможных путей решения проблемы были сформированы предложения по установке редукционных клапанов, разработана схема их установки и определены режимы работы новой системы. Установка регуляторов по всему городу решалась в два этапа. В 2016 г. в результате установки семи регуляторов были остановлены 13 повысительных насосных станций общей мощностью более 150 кВт. На втором этапе в 2017 г. были установлены еще 12 регуляторов и остановлены 8 станций общей мощностью 40 кВт, а на пяти станциях была выполнена оптимизация с заменой насосов агрегатами меньшей мощности. Окупаемость проекта составила 4 года.The linear remoteness of the water facilities in the city of Novokuznetsk reaches 40 km with a difference in elevations of 157 m. The two main water intakes of the city are located at the distance of 20 km from each other, which suggests the availability of zones with different free head. Pressure control and water distribution among the districts was traditionally carried out by throttling shutoff valves, and 119 pumping stations with pumps of 0.751250 kW capacity were operating in the initial water supply scheme. Based on the analysis of possible solutions to the problem, proposals were made for the installation of pressure reducing valves, an installation diagram was developed, and the operating modes of the new system were determined. The installation of regulators throughout the city was carried out in two stages. In 2016, as a result of the installation of 7 regulators, 13 booster pumping stations with a total energy consumption of more than 150 kW were phased out at the second stage in 2017, 12 more regulators were installed and 8 more pumping stations with a total energy consumption of 40 kW were put out of operation and 5 pumping stations were upgraded with pump replacement for lower capacity. The project payback period was 4 years.

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