AN INVESTIGATION BY THE BEP-TR METHOD OF THE EFFECT OF OBSTRUCTION ANGLE PARAMETER ON LIGHTING ENERGY PERFORMANCE AND DAYLIGHT SUPPLY

2021 ◽  
Vol 16 (3) ◽  
pp. 179-194
Author(s):  
Özlem Sümengen ◽  
Melike Özömer
Keyword(s):  
Energy Consumption ◽  
Energy Performance ◽  
The European Union ◽  
Zoning Regulations ◽  
Consumption Values ◽  
Supply Factor ◽  
Lighting Energy ◽  
Improved Model ◽  
European Union Member States ◽  
Angle Parameter

ABSTRACT Following the EN 15193, 2008 Energy Performance in Buildings Regulation in the European Union Member States, a comprehensive calculation can be made on lighting energy performance and daylight effect. This improved model accounts for Turkey’s “BEP-TR” (“Regulation on Energy Performance in Buildings”). In the present study, the effect of the obstruction angle parameter of buildings on lighting energy consumption and daylight provided is examined through a sample hotel project by the BEP-TR calculation method. This study investigates the effect of daylight on lighting energy performance alternatives that were produced according to the height, building distance variations (causing obstruction angle), and the correlation between annual lighting consumption values, daylight supply factor, and obstruction parameters. Accordingly, the current study aims to develop a method to assist zoning regulations, building intervals, and height decisions by determining specific ratios between obstruction parameters, daylight supply factor and lighting energy consumption values. Results of this study clearly show that obstruction parameter variables affect both the daylight supply factor and annual lighting energy significantly.

scholarly journals Building Energy Performance Analysis after Changing Its Form of Use from an Office to a Residential Building

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 564
Author(s):  
Przemysław Markiewicz-Zahorski ◽  
Joanna Rucińska ◽  
Małgorzata Fedorczak-Cisak ◽  
Michał Zielina
Keyword(s):  
Energy Consumption ◽  
Multinational Corporations ◽  
Energy Demand ◽  
Residential Building ◽  
Energy Performance ◽  
Office Building ◽  
Modern World ◽  
Simultaneous Increase ◽  
The European Union ◽  
Zero Energy

Lowering energy consumption is one of the most important challenges of the modern world. Since the construction sector accounts for 40% of total energy consumption worldwide, the Parliament of the European Union has developed a Directive, according to which all newly designed and thermally upgraded buildings should meet the requirements of almost zero energy demand (nZEBs) from 1 January 2021. At the same time, in Poland, but also in many other countries in the world, there is a growing oversupply of office space in large cities with a simultaneous increase in demand for apartments, which is caused, among other things, by the increase in the share of remote work and the COVID-19 pandemic. Consequently, this is forcing owners to change the use of buildings from office to residential. This article analyses the possibilities of changing the function of an office building to a multi-family residential building. For both functional solutions, a comparative energy analysis was carried out, taking into account different work schedules and the requirements for new buildings with zero energy demand. The analyses have shown that changing the form of use of an office building to a multi-family building without significant financial and technical costs is possible. On the other hand, the reverse change of the form of use is much more difficult and, in many cases, practically impossible. Due to the fact that many offices are now multinational corporations, this issue is global.

scholarly journals Trends of Energy Performance Certification of Buildings in Azerbaijan

2018 ◽  
Vol 7 (3.2) ◽  
pp. 563
Author(s):  
Samira Akbarova ◽  
. .
Keyword(s):  
European Union ◽  
Energy Consumption ◽  
Energy Saving ◽  
Energy Performance ◽  
Building Codes ◽  
Construction Sector ◽  
The European Union ◽  
Certification System ◽  
Energy Auditing ◽  
World Trend

Energy consumption by construction sector is estimated by multi- disciplinary energy auditing and results are represented in an energy performance building certificate. The building certification, which is a world trend today, is applied successfully for many buildings  inAzerbaijantoo. The purpose of this paper to study the current methodology of energy building certification in terms of the technological aspects of energy auditing. Many documents of the European Union directives and Russian building codes and regulations in the field of ecology and energy saving in construction sector have been revised for implementing them as base for national energy performance certification system AZERI GREEN ZOOM. The assessment categories and main requirements have been considered. The results of this overview have shown the trends and problems in this field.  There are given examples of certified buildings.  

scholarly journals Top Energy Saver of the Year: Results of an Energy Saving Competition in Public Buildings

2020 ◽  
Vol 24 (3) ◽  
pp. 278-293
Author(s):  
Jan Kaselofsky ◽  
Ralf Schüle ◽  
Marika Rošā ◽  
Toms Prodaņuks ◽  
Anda Jekabsone ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Energy Use ◽  
Residential Buildings ◽  
Electricity Consumption ◽  
Energy Performance ◽  
Heat Consumption ◽  
The European Union ◽  
Public Building ◽  
Team Members

AbstractNon-residential buildings in the European Union consume more than one third of the building sector’s total. Many non-residential buildings are owned by municipalities. This paper reports about an energy saving competition that was carried out in 91 municipal buildings in eight EU member states in 2019. For each public building an energy team was formed. The energy teams’ activities encompassed motivating changes in the energy use behaviour of employees and small investments. Two challenges added an element of gamification to the energy saving competition. To assess the success of the energy saving competition, an energy performance baseline was calculated using energy consumption data of each public building from previous years. Energy consumption in the competition year was monitored on a monthly base. After the competition the top energy savers from each country were determined by the percentage-based reduction of energy consumption compared to the baseline. On average, the buildings had an electricity and heat consumption in 2019 that was about 8 % and 7 %, respectively, lower than the baseline. As an additional data source for the evaluation, a survey among energy team members was conducted at the beginning and after the energy competition. Support from superiors, employee interest and motivation and behaviour change as assessed by energy team members show a positive, if weak or moderate, correlation with changes in electricity consumption, but not with changes in heat consumption.

Uncertainty of Daylighting Performance of Manual Solar Shades and its Influence on Lighting Energy

2020 ◽  
pp. 77-84
Author(s):  
Jian Yao ◽  
LiYi Chen ◽  
Wu Jin
Keyword(s):  
Energy Consumption ◽  
Economic Analysis ◽  
Stochastic Model ◽  
Building Energy ◽  
Energy Performance ◽  
Building Energy Consumption ◽  
Occupant Behaviour ◽  
The South ◽  
Weak Relationship ◽  
Lighting Energy

Occupant behaviour significantly influences building energy consumption. This paper is devoted to studies the uncertainty of daylighting performance and lighting energy of manual solar shades on the south facade. A developed stochastic model for manual solar shades was used for co-simulation by BCVTB. Results show that uncertainty of shade action was not suppressed by the shade behaviour model with very weak relationship between different simulation outputs. Uncertainty of daylighting performance is 15.08 % while lighting energy uncertainty is 10.38 %. Although this level of energy uncertainty is not very significant, it influences economic analysis of manual solar shades and therefore, occupant related uncertainty should be taken into consideration when predicting energy performance of manual shades.

scholarly journals Energy Efficiency Evaluation of Different Glazing and Shading Systems in a School Building

2019 ◽  
Vol 111 ◽  
pp. 03052 ◽  
Author(s):  
Mohammed Khalaf ◽  
Touraj Ashrafian ◽  
Cem Demirci
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Demand ◽  
Energy Performance ◽  
Building Envelope ◽  
School Building ◽  
Total Energy Consumption ◽  
Heating And Cooling ◽  
Lighting Energy ◽  
Energy Efficiency Evaluation

The energy conversations methods and techniques take a significant role in the energy performance of the buildings. Façade and shading systems are in continuous development, and recent studies are showing the importance of implementation of such systems to reduce energy consumption and enhance the effectiveness of the building performance. School buildings are mostly being used during daytime, hence, require active use of sunlight. A measure that is taken on a school building envelope can prevent overheating and overcooling and reduce the heating and cooling energy consumption but at the same time can increase the lighting energy consumption vice versa. Thus, it is necessary to optimise the energy required for climatisation of a building with lighting energy demand. The main aim of the paper is to provide analysis for façade and shading systems applied to a school building and study the effectiveness of it on energy consumption and conservation. The case study for this paper is a typical building project designed to be located in Istanbul, Turkey and has a traditional façade system which is clear double layer windows without any shading devices. The analyses of the energy efficiency of these systems will be presented. The different glazing types and shading systems alternatives will show the most efficient one to be used as some optimised alternatives for the systems. Findings indicate that proper glazing and shading systems can reduce the needed energy for heating and lightening and thus total energy consumption of a school building significantly.

Cost Optimality and/or Sustainability in our Building's Life

2014 ◽  
Vol 899 ◽  
pp. 87-92
Author(s):  
Krisztina Severnyak
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Minimum Energy ◽  
Energy Performance ◽  
Construction Technology ◽  
The European Union ◽  
Optimum Energy ◽  
Minimum Requirements ◽  
Optimum Cost ◽  
Traditional Natural

As energy efficiency is becoming an increasingly important feature, buildings are expected to comply with several criteria and requirements and these criteria are changed and extended with time. The Directive 2002/91/EC of the European Parliament and Commission on the energy performance of buildings and the Directive 2010/31/EU request Member States to apply minimum energy performance requirements. These minimum requirements are indeed applied all over the European Union and should be regularly reviewed. Our research aimed at clarifying whether optimum cost and/or energy efficiency represents the next step towards actual energy efficiency. The Directive brought forth an aspect that should have been prioritized long ago already: Are the construction and refurbishment of buildings in Europe economically feasible? The methodology prescribed by the Directive leaves several questions open and provokes further research. The methodology uses costs only as the basis for examining energy consumption and emissions related to already existing, newly constructed or refurbished buildings or refurbishment options. Optimum cost does not necessarily correspond to optimum energy or environmental performance. The price of materials and equipment built in does not always reflect the energy built in or environmental advantages. Subsidies to promote energy efficiency may bias optimum costs. Viewing optimums from the broader aspect of energy consumption, proper results are only yielded by analyses completed for the entire life cycle of buildings. This way, we may decide which characteristics attribute more to a low energy and emission status, i.e. state-of-the-art construction technology or traditional, natural constructing methods such as those used for „conservative eco buildings.” [1]

scholarly journals EXPANDING THE POSSIBILITIES OF BUILDING MODERNIZATION: CASE STUDY OF LITHUANIA

2014 ◽  
Vol 20 (6) ◽  
pp. 819-828 ◽  
Author(s):  
Vytautas Stankevičius ◽  
Jūratė Karbauskaitė ◽  
Arūnas Burlingis ◽  
Jolanta Šadauskienė ◽  
Romaldas Morkvėnas
Keyword(s):  
European Union ◽  
Energy Consumption ◽  
Great Difficulty ◽  
The European Union ◽  
Sustainable Building ◽  
Apartment Buildings ◽  
Heated Floor ◽  
European Union Member States ◽  
The Eu

Energy saving has become one of the foremost priorities in the European Union and a great deal of attention is directed towards the sector of sustainable building. However, the EU members that have an extensive Soviet heritage now face a great difficulty in reducing energy consumption. Since many apartment buildings are in especially poor thermal condition, and the heat supply infrastructure is morally and physically outdated, energy consumption for heating is significant. The modernization (renovation) of such old buildings is impeded not only by legal and technical factors, but also financial and social aspects in regard to the residents. Thus, this paper provides new model of investments and modernization of apartment buildings on the basis of the calculation of energy input per one degree-day of the heated floor area. The presented degree-days calculation method enables the calculation and inter-comparison of data gathered in all European Union member states without taking into account specific climate parameters of each.

scholarly journals Multi-Criteria Optimisation of an Experimental Complex of Single-Family Nearly Zero-Energy Buildings

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1541 ◽  
Author(s):  
Małgorzata Fedorczak-Cisak ◽  
Anna Kotowicz ◽  
Elżbieta Radziszewska-Zielina ◽  
Bartłomiej Sroka ◽  
Tadeusz Tatara ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Energy Performance ◽  
Single Family ◽  
Zero Energy ◽  
Construction Costs ◽  
Direct Construction ◽  
Experimental Complex ◽  
European Union Member States ◽  
Occupancy Costs ◽  
Zero Energy Buildings

The Directive 2010/31/EU on the energy performance of buildings has introduced the standard of “nearly zero-energy buildings” (NZEBs). European requirements place the obligation to reduce energy consumption on all European Union Member States, particularly in sectors with significant energy consumption indicators. Construction is one such sector, as it is responsible for around 40% of overall energy consumption. Apart from a building’s mass and its material and installation solutions, its energy consumption is also affected by its placement relative to other buildings. A proper urban layout can also lead to a reduction in project development and occupancy costs. The goal of this article is to present a method of optimising single-family house complexes that takes elements such as direct construction costs, construction site organisation, urban layout and occupancy costs into consideration in the context of sustainability. Its authors have analysed different proposals of the placement of 40 NZEBs relative to each other and have carried out a multi-criteria analysis of the complex, determining optimal solutions that are compliant with the precepts of sustainability. The results indicated that the layout composed of semi-detached houses scored the highest among the proposed layouts under the parameter weights set by the developer. This layout also scored the highest when parameter weights were uniformly distributed during a test simulation.

scholarly journals Energetic and Exergetic Analysis of Low Global Warming Potential Refrigerants as Substitutes for R410A in Ground Source Heat Pumps

Energies ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3538 ◽  
Author(s):  
Sergio Bobbo ◽  
Laura Fedele ◽  
Marco Curcio ◽  
Anna Bet ◽  
Michele De Carli ◽  
...  
Keyword(s):  
Global Warming ◽  
Energy Consumption ◽  
Global Warming Potential ◽  
Energy Performance ◽  
Heat Pumps ◽  
Working Fluid ◽  
The European Union ◽  
Ground Source Heat Pumps ◽  
Compression Phase ◽  
Ground Source

In the European Union (EU), buildings are responsible for about 40% of the total final energy consumption, and 36% of the European global CO2 emissions. The European Commission released directives to push for the enhancement of the buildings energy performance and identified, beside the retrofit of the current building stock, Heating, Ventilation, and Air Conditioning (HVAC) systems as the other main way to increase renewable energy sharing and overall building energy efficiency. For this purpose, Ground Source Heat Pumps (GSHPs) represent one of the most interesting technologies to provide energy for heating, cooling, and domestic water production in residential applications, ensuring a significant reduction (e.g., up to 44% compared with air-source heat pumps) of energy consumption and the corresponding emissions. At present, GSHPs mainly employ the refrigerant R410A as the working fluid, which has a Global Warming Potential (GWP) of 2087. However, following the EU Regulation No. 517/2014 on fluorinated greenhouse gases, this high GWP refrigerant will have to be substituted for residential applications in the next years. Thus, to increase the sustainability of GSHPs, it is necessary to identify short time alternative fluids with lower GWP, before finding medium-long term solutions characterized by very low GWP. This is one of the tasks of the UE project "Most Easy, Efficient, and Low-Cost Geothermal Systems for Retrofitting Civil and Historical Buildings" (acronym GEO4CIVHIC). Here, a thorough thermodynamic analysis, based on both energy and exergy analysis, will be presented to perform a comparison between different fluids as substitutes for R410A, considered as the benchmark for GSHP applications. These fluids have been selected considering their lower flammability with respect to hydrocarbons (mainly R290), that is one of the main concerns for the companies. A parametric analysis has been performed, for a reversible GSHP cycle, at various heat source and sink conditions, with the aim to identify the fluid giving the best energetic performance and to evaluate the distribution of the irreversibilities along the cycle. Considering all these factors, R454B turned out to be the most suitable fluid to use in a ground source heat pump, working at given conditions. Special attention has been paid to the compression phase and the heat transfer in evaporator and condenser.

scholarly journals ENERGY BALANCE OF A LOW ENERGY HOUSE

2012 ◽  
Vol 18 (3) ◽  
pp. 369-377 ◽  
Author(s):  
Rasa Džiugaitė-Tumėnienė ◽  
Vidmantas Jankauskas ◽  
Violeta Motuzienė
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Renewable Energy Sources ◽  
Energy Systems ◽  
Energy Performance ◽  
Building Envelope ◽  
Low Energy ◽  
The European Union ◽  
Consumption Data ◽  
Low Energy Buildings

Currently, such topics as improvement of energy efficiency of buildings and energy systems, development of sustainable building concepts, and promotion of renewable energy sources are in the focus of attention. The energy efficiency targets of the European Union are based on information regarding energy consumed by buildings. The amount of energy consumed by buildings depends on the main influencing factors (namely, climate parameters, building envelope, energy systems, building operation and maintenance, activities and behaviour of occupants), which have to be considered in order to identify energy efficiency potentials and opportunities. The article aims to investigate the total amount of energy consumed by a low energy house, built in Lithuania, using a combination of energy consumption data received from a simulation and measured energy consumption data. The energy performance analysis in the low energy house revealed some factors that have the main influence on the total figures of energy consumed by the house. The identified significant factors were used to find the optimal solutions for the design of low energy buildings.

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