scholarly journals Energy performance of building heating - theory and reality on the example of educational buildings

2018 ◽  
Vol 174 ◽  
pp. 01018
Author(s):  
Piotr Lis ◽  
Anna Lis
Keyword(s):  
Energy Consumption ◽  
Energy Demand ◽  
Energy Performance ◽  
Final Energy ◽  
Theoretical Assumptions ◽  
Educational Buildings ◽  
Final Energy Demand ◽  
Actual Energy Consumption

The calculative methods, which are adopted in various fields of engineering, are usually a certain kind of theoretical approximation of reality. The deviations from a full consistency of actual conditions and theoretical assumptions occur also in case of building heating. This work presents the selected results of examinations connected with an annual energy consumption CH and annual final energy demand Qk,H for heating and conducted on the group of educational buildings. The presented analysis and its results regard the group including 46 of 50 educational buildings, which form a municipal group of the buildings of this type. The purpose of presented analysis was to examine the influence of possible occurrence and level of differences between the annual energy consumption CH and annual final energy demand Qk,H for heating of examined buildings. The realization of this purpose is the basis for further research and analysis aimed at determining the dominant reasons of mentioned differences, establishing their level and propose a calculative method for reducing the differences between the values "picturing" the thermal needs of educational buildings in actual (energy consumption CH) and theoretical (final energy demand Qk,H) conditions.

scholarly journals Comparative Analysis of the Energy Sector Development Trends and Forecast of Final Energy Demand in the Baltic States

2019 ◽  
Vol 11 (2) ◽  
pp. 521 ◽  
Author(s):  
Vaclovas Miskinis ◽  
Arvydas Galinis ◽  
Inga Konstantinaviciute ◽  
Vidas Lekavicius ◽  
Eimantas Neniskis
Keyword(s):  
Economic Growth ◽  
Energy Consumption ◽  
Comparative Analysis ◽  
Detailed Analysis ◽  
Energy Demand ◽  
Baltic Region ◽  
Final Energy ◽  
Final Energy Consumption ◽  
Final Energy Demand ◽  
The Baltic

The paper provides a comparative analysis of economic growth in Estonia, Latvia and Lithuania and discusses differences in development of the main sectors during the period 2000–2016. Based on detailed analysis of energy sector development, the driving factors influencing changes in primary energy consumption in each country and in the Baltic region are discovered. Increase of renewable energy sources (RES) consumption in the Baltic region over this period by 73.6% is emphasized. The paper presents valuable insights from analysis of trends in final energy consumption by sectors of the national economies, branches of the manufacturing sector, and by energy carriers. Long-term relationships between economic growth and final energy consumption are established. An econometric model was applied to predict final energy demand in the Baltic States for the 2020 horizon. It is emphasized that growing activities in the manufacturing and transport sectors will cause increase of final energy demand in all three countries. Based on detailed analysis of greenhouse gas (GHG) emissions trends some positive shifts are shown and the necessity of new policies in the transport sector and agriculture is identified. Changes of emission intensity indicators are examined and a potential for decoupling of carbon dioxide (CO2) emissions from economic growth in Estonia is indicated.

Quantitative Assessment of Advanced Energy Efficiency Retrofitting for Hospitals in India

2016 ◽  
Author(s):  
Lakshman Ravi Teja Pedamallu ◽  
Vivek Kumar Singh ◽  
Alvaro Peixoto Filipe Gomes
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Demand ◽  
System Modeling ◽  
Decomposition Analysis ◽  
World Health ◽  
Total Energy Consumption ◽  
Positive Effects ◽  
Final Energy ◽  
Final Energy Demand

Achieving energy efficiency in buildings is an important factor in developed and as well in developing countries in order to meet its energy demand. Over the past few years, a number of reports have been emerged stating that the buildings sectors are responsible for approximately 31% of global final energy demand. Buildings account for 35% of total final energy consumption in India and building energy consumption is growing about 8% per years. Final energy demand in Indian building sector will grow up-to five times by the end of this century, driven by rapid income and population growth. Hospitals are institutions for the care of people with health problems and are usually functional 24hrs a day, all year around, which demands a lot of energy. Health sector is one of the largest and fastest growing sectors in India. By 2020, it is expected to become a $ 280 billion industry. In India hospitals contribute 23% of total energy consumption and the hospital building growth rate 12–15% in last decade. The World Health Organization estimated that India need 80,000 additional hospital beds every year to meet the demands of India’s population. The aim of this study is to assess the energy demand, energy savings & reduced greenhouse gas emissions by increasing the energy efficiency using advanced retrofitting. Bottom-Up Energy Analysis System (BUENAS) is an end use energy demand projection model for Hospital buildings in India, to normalize the assessment of energy-saving models also going to fill the gap in energy demand reduction by energy system modeling and decomposition analysis. Energy efficiency retrofitting of existing buildings plays a major role in developing country like India in order improve its energy security and minimizing the greenhouse gases. The positive effects of retrofitting of energy efficiency and need the policies and target base proposal for government intention to achieve the potential for energy efficiency are discussed.

scholarly journals Energy Demands Of The Existing Collective Buildings With Bearing Structure Of Large Precast Concrete Panels From Timisoara

2015 ◽  
Vol 5 (1) ◽  
pp. 75-82
Author(s):  
S. Pescari ◽  
V. Stoian ◽  
D. Tudor ◽  
Carmen Măduţa
Keyword(s):  
Energy Consumption ◽  
Energy Demand ◽  
Precast Concrete ◽  
Energy Performance ◽  
Efficient Solutions ◽  
Existing Buildings ◽  
Concrete Panels ◽  
Energy Demands ◽  
Actual Energy Consumption ◽  
Bearing Structure

Abstract One of the targets of EU Directives on the energy performance of buildings is to reduce the energy consumption of the existing buildings by finding efficient solutions for thermal rehabilitation. In order to find the adequate solutions, the first step is to establish the current state of the buildings and to determine their actual energy consumption. The current paper aims to present the energy demands of the existing buildings with bearing structure of large precast concrete panels in the city of Timisoara. Timisoara is one of the most important cities in the west side of Romania, being on the third place in terms of size and economic development. The Census of Population and Housing of 2011 states that Timisoara has about 127841 private dwellings and 60 percent of them are collective buildings. Energy demand values of the existing buildings with bearing structure of large precast concrete panels in Timisoara, in their current condition, are higher than the accepted values provided in the Romanian normative, C107. The difference between these two values can reach up to 300 percent.

An analysis of energy consumption for a selection of countries in the Southern African Development Community

2010 ◽  
Vol 21 (1) ◽  
pp. 11-24 ◽  
Author(s):  
Bruno Merven ◽  
Alison Hughes ◽  
Stephen Davis
Keyword(s):  
South Africa ◽  
Energy Consumption ◽  
Energy Demand ◽  
Southern African Development Community ◽  
Biomass Energy ◽  
Quality Data ◽  
African Development ◽  
Final Energy ◽  
Final Energy Demand ◽  
Business As Usual

This paper examines the energy consumption, supply and resources of some of the countries in the Southern African Development Community (SADC) in 2005, the base year for this analysis. The region is rich in energy resources and currently enjoys relatively stable and affordable electricity. Except in the case of Botswana, Mauritius, Namibia and South Africa, final energy demand is dominated by the residential sector in the form of biomass. Energy consumption or final energy demand in Angola, Botswana, Mozambique, South Africa, Tanzania, Zambia and Zimbabwe is projected to 2030 using a Long Range Energy Alternatives Plan-ning (LEAP) model in a ‘business as usual’ scenario, the other countries being left out because of poor quality data. The projections are carried out by relating historic sectoral GDP and population growth in each country to energy demand and then using the historical link and the projections of these drivers to project energy demand. The analysis under this ‘business as usual’ scenario seems to indicate that we can expect to see a large increase in consumption in these countries, especially in the form of biomass and electricity. In both cases, supply is a concern. Having established what the present resources are; what some of the supply elements are currently in place; what the base-year demand is; and some basic relationships between demand and socio-economic drivers, this paper sets the stage for further studies that include the future energy supply; regional trade; and scenario analysis using indicators of sustainable development for the region. However, further analysis of the regional energy system, is only valuable if it is supported by good data. A reliable energy balance is needed for the countries not modelled here, and in the case of the modelled countries, better data is also needed, especially in the use biomass.

scholarly journals Application of Rough Set Theory (RST) to Forecast Energy Consumption in Buildings Undergoing Thermal Modernization

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1309 ◽  
Author(s):  
Tomasz Szul ◽  
Stanisław Kokoszka
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Set Theory ◽  
Rough Set ◽  
Energy Demand ◽  
Rough Set Theory ◽  
Residential Buildings ◽  
Simple Procedure ◽  
Energy Performance ◽  
Improve Energy Efficiency

In many regions, the heat used for space heating is a basic item in the energy balance of a building and significantly affects its operating costs. The accuracy of the assessment of heat consumption in an existing building and the determination of the main components of heat loss depends to a large extent on whether the energy efficiency improvement targets set in the thermal upgrading project are achieved. A frequent problem in the case of energy calculations is the lack of complete architectural and construction documentation of the analyzed objects. Therefore, there is a need to search for methods that will be suitable for a quick technical analysis of measures taken to improve energy efficiency in existing buildings. These methods should have satisfactory results in predicting energy consumption where the input is limited, inaccurate, or uncertain. Therefore, the aim of this work was to test the usefulness of a model based on Rough Set Theory (RST) for estimating the thermal energy consumption of buildings undergoing an energy renovation. The research was carried out on a group of 109 thermally improved residential buildings, for which energy performance was based on actual energy consumption before and after thermal modernization. Specific sets of important variables characterizing the examined buildings were distinguished. The groups of variables were used to estimate energy consumption in such a way as to obtain a compromise between the effort of obtaining them and the quality of the forecast. This has allowed the construction of a prediction model that allows the use of a fast, relatively simple procedure to estimate the final energy demand rate for heating buildings.

scholarly journals Do energy performance certificates allow reliable predictions of actual energy consumption and savings? Learning from the Swiss national database

2020 ◽  
Vol 224 ◽  
pp. 110235 ◽  
Author(s):  
Stefano Cozza ◽  
Jonathan Chambers ◽  
Chirag Deb ◽  
Jean-Louis Scartezzini ◽  
Arno Schlüter ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Energy Performance ◽  
National Database ◽  
Actual Energy Consumption

scholarly journals Implementation of the ISO 50001 standard to sustainable energy and economic saving the industrial sector

2020 ◽  
Vol 25 (2) ◽  
pp. 261-268
Author(s):  
Guillermo Valencia ◽  
Katherin Nahomy Rodriguez ◽  
Gloria Raquel Torregroza Matos ◽  
Carlos Acevedo ◽  
Jorge Duarte Forero
Keyword(s):  
Energy Consumption ◽  
Energy Demand ◽  
Fossil Fuels ◽  
Gap Analysis ◽  
Energy Performance ◽  
Industrial Sector ◽  
Energy Costs ◽  
Working Pressure ◽  
Economic Saving ◽  
Save Energy

Given the growth in energy demand, the limited energy resources, and the high environmental impact of energy generation from fossil fuels, it is vital to find methods to obtain save energy costs in different sectors, such as residential, industrial, transportation sector, and domestic. This paper presents a methodology that allows the implementation of an energy management system following the guidelines of the ISO 50001 standard. A gap analysis was performed to determine the position of the organization with respect to the requirements of the standard, and the next step was the inspection of the plant to find opportunities for improvement that would lead to energy optimization. From the results, six equipment was the cause of the 82% of the energy consumption in the production process, and some recommendation was proposed with the aim to optimize energy consumption. A methodology is proposed for the standard implementation, which can be implemented by different organizations from different fields to achieve savings in energy costs in the plant. Some relevant actions to improve the energy performance of the plant were proposed, such as the optimization of the compressed air system, the reduction of potential numbers of leakage, and the reduction of the working pressure of the system.

scholarly journals Finding Alternative Methods for Controlling the Power Shortage in Kurdistan through Improving Buildings’ Energy Performance

2018 ◽  
Vol 7 (4) ◽  
pp. 124
Author(s):  
Kawar T. Salih
Keyword(s):  
Energy Efficiency ◽  
Developing Countries ◽  
Energy Consumption ◽  
Energy Demand ◽  
Building Design ◽  
Energy Performance ◽  
Alternative Methods ◽  
Research Approach ◽  
Building Sector

The power shortage is one of the major problems in developing countries. Kurdistan Region of Iraq suffers from this issue, like other developing countries. Especially, after the economy crises that has started in 2014. However, all its efforts for tackling this challenge has been in providing more energy supply stations and more fuel provision. Few studies have been found in the region that seek the relation between the quality of buildings and energy consumption. It is questioned if the building sector in Kurdistan is well managed and environmentally sufficient to consume minimum amount of energy since it is the largest energy consuming sector. This research will seek an alternative to decrease the energy demand in buildings instead of expanding the energy sector. This could be achieved by evaluating the quality of building sector environmentally and improving it. Providing guidelines for building’s thermal regulations, passive building design and increasing the energy efficiency of buildings by renewal means could be alternative strategies for lowering the energy consumption. Theoretical and numerical research approach have been taken in to account for finding the answer through a case study and comparative analysis. A variation of 21-29% of power consumption can be observed between buildings that have not considered energy efficiency criteria in their design and those who reflected them more in the design.

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