scholarly journals Energy performance of single family houses in Serbia: Analysis of calculation procedures

2019 ◽  
Vol 23 (Suppl. 5) ◽  
pp. 1695-1705
Author(s):  
Dimitrije Manic ◽  
Mirko Komatina ◽  
Biljana Vucicevic ◽  
Marina Jovanovic
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Dynamic Simulation ◽  
Simulation Method ◽  
Energy Performance ◽  
Building Envelope ◽  
Test Case ◽  
Existing Buildings ◽  
Single Family ◽  
Steady State Method

Energy certification of buildings in Serbia was introduced in 2011 and energy label depends on energy need for heating per unit floor area of heated space, calculated by the fully prescribed monthly quasi-steady-state method defined by ISO 13790. In the Republic of Serbia, most of families live in single-family houses built before the energy certification of buildings was introduced. Therefore, the estimation of energy performance of the existing buildings is important for labeling, and evaluation of energy saving measures and energy strategies to be implemented. This paper examines the applicability of monthly method defined by National legislation on the existing buildings stock in Serbia, by comparing it to the more accurate dynamic simulation method. Typical single-family houses are taken as a test case, since they are responsible for about 76% of energy consumption for heating. The results show that the dynamic simulation method estimates 21% to 54% higher energy need for heating, compared to the monthly method. Also, the monthly method estimates up to 13% higher savings by typical building envelope energy saving measures, compared to the dynamic simulation. This paper recommends improvement in procedures for calculation of building energy performance index to better assess energy consumption, effects of energy saving measures, and create solid background for developing and implementing of energy saving strategies.

scholarly journals Parameters that influence the probability on lower-than-expected energy savings - a pre- and post renovation energy consumption analysis of 90,000 renovated houses in the Netherlands

2019 ◽  
Vol 111 ◽  
pp. 04025
Author(s):  
Paula van den Brom ◽  
Arjen Meijer ◽  
Henk Visscher
Keyword(s):  
Energy Consumption ◽  
The Netherlands ◽  
Energy Savings ◽  
Housing Stock ◽  
Energy Performance ◽  
Building Envelope ◽  
Single Family ◽  
Effective Measure ◽  
Energy Efficient Buildings ◽  
Actual Energy Consumption

Thermal renovations are considered to be an effective measure to reduce residential energy consumption. However, they often result in lower-than-expected energy savings. In this paper, we investigate some parameters that influence the probability on lower-than-expected energy savings. We do this by comparing actual pre- and post-renovation energy consumption of 90,000 houses in the Netherlands. The results of this study confirm that the effect of the parameters differ per renovation measure. For every renovation measure, the energy performance gap post renovation plays a significant role. This implies that the use of actual energy consumption data to determine the potential energy savings could therefore help to reduce the number of renovations resulting in lower-than-expected energy savings. Also, the energy efficiency state of the building pre-renovation plays an important role. One should take into account that renovations of energy inefficient buildings more frequently result in lower-than-expected energy savings than renovations of relatively energy efficient buildings. For the type of house we found that multifamily houses more often result in lower than expected savings when building installations are improved, while single-family houses renovations more frequently result in lower energy savings than expected when the building envelope insulation is improved. These insights can contribute to the decision making process whether or not to take a certain renovation measures, they can also help to manage expectations on housing stock level and individual building level.

scholarly journals Case Study of Thermal Diagnostics of Single-Family House in Temperate Climate

Energies ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 4549 ◽  
Author(s):  
Aleksandra Specjał ◽  
Aleksandra Lipczyńska ◽  
Maria Hurnik ◽  
Małgorzata Król ◽  
Agnieszka Palmowska ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Ventilation System ◽  
Energy Performance ◽  
Primary Energy ◽  
Building Envelope ◽  
Hot Water ◽  
Temperate Climate ◽  
Normative Values ◽  
Single Family ◽  
Family House

Reduction of the primary energy consumption is a crucial challenge for the building sector due to economic and environmental issues. Substantial savings could be achieved within the household. In this paper, we investigate the energy performance of a single-family house located in the temperate climate. The assessment is based on the comprehensive thermal diagnostic of the building performed on-site and via computational analyses. The on-site measurements included diagnostics of the building envelope, heat source, heating and domestic hot water system, ventilation system, and indoor environmental quality. Analyses confirmed that the studied building, which was built in 2008, meets the legislation requirements for the primary energy usage at that time and nowadays. However, results show discrepancies between energy performance obtained through on-site measurements and computational methods following regulations. Partially, discrepancies are a result of differences on normative values and how the building is operated in practice. It is also showed how important the role in the assessment of energy consumption through measurements is played by the measurement period.

scholarly journals INVESTIGATION OF URBAN TEXTURE AND ENERGY CONSUMPTION RELATIONSHIP IN THE CONTEXT OF URBAN TRANSFORMATION: KADIKÖY CASE STUDY

2021 ◽  
Vol 11 (1) ◽  
pp. 162-181
Author(s):  
Halil BEYAZTAŞ
Keyword(s):  
Energy Consumption ◽  
Urban Renewal ◽  
Energy Performance ◽  
Transformation Process ◽  
Building Envelope ◽  
Urban Transformation ◽  
Scale Transformation ◽  
Earthquake Risk ◽  
Existing Buildings ◽  
High Rise

Turkey is undergoing a major transformation process. This process, also called urban renewal, takes place at neighborhood and building (on-site transformation) scales. The literature focuses on transformation problem of the neighborhood scale; however, the characteristics of the problems associated with building scale transformation differ. One of these is texture differentiation. With the on-site renewal process, the existing urban texture and its micro-climate characteristics change. An existing low-rise building in the street is transformed and built as a high-rise multi-storey building, which shades the neighboring buildings in the texture. In this case, it can be predicted that the energy consumption performance of existing buildings will be affected. The aim of this study is to examine the effect of reconstructed high-rise buildings on existing buildings in the texture in terms of energy performance. The study area is chosen as Suadiye (Kadıköy, Istanbul) because of the high urban renewal activity. Using computer simulation methodology, the energy performance of a reference building was calculated for three texture scenarios: base situation (rural texture), 1960 urban texture and 2019 texture (after renewal). In this study, in which the building envelope is kept constant, the effect of the urban texture on the building energy consumption is clearly observed. According to the results of the study, lighting and heating energy consumption of the reference building increased during the transition from rural to 1960 texture. With the urban transformation law numbered 6306 enacted in 2012, it would be possible to save energy by optimizing the urban texture. However, in practice, it is seen that energy consumption of the reference building is increased more in the transformation from the 1960 texture to the 2019 texture. In other words, texture change has increased energy consumption. One of the goals of this high-cost transformation process, which is necessarily experienced with earthquake risk in the first place, was stated as providing energy savings. For this purpose, envelope insulation is mandatory in reconstructed buildings. However, independent of the building envelope, the characteristics of the urban texture also play an important role in energy consumption. For this reason, the optimization of the urban texture should be evaluated as a part of the transformation process and legal regulations should be implemented to support this. Potential impact analysis should be done before intervening in the urban texture.

scholarly journals INVESTIGATION OF URBAN TEXTURE AND ENERGY CONSUMPTION RELATIONSHIP IN THE CONTEXT OF URBAN TRANSFORMATION: KADIKÖY CASE STUDY

2021 ◽  
Vol 11 (1) ◽  
pp. 162-181
Author(s):  
Halil BEYAZTAŞ
Keyword(s):  
Energy Consumption ◽  
Urban Renewal ◽  
Energy Performance ◽  
Transformation Process ◽  
Building Envelope ◽  
Urban Transformation ◽  
Scale Transformation ◽  
Earthquake Risk ◽  
Existing Buildings ◽  
High Rise

Turkey is undergoing a major transformation process. This process, also called urban renewal, takes place at neighborhood and building (on-site transformation) scales. The literature focuses on transformation problem of the neighborhood scale; however, the characteristics of the problems associated with building scale transformation differ. One of these is texture differentiation. With the on-site renewal process, the existing urban texture and its micro-climate characteristics change. An existing low-rise building in the street is transformed and built as a high-rise multi-storey building, which shades the neighboring buildings in the texture. In this case, it can be predicted that the energy consumption performance of existing buildings will be affected. The aim of this study is to examine the effect of reconstructed high-rise buildings on existing buildings in the texture in terms of energy performance. The study area is chosen as Suadiye (Kadıköy, Istanbul) because of the high urban renewal activity. Using computer simulation methodology, the energy performance of a reference building was calculated for three texture scenarios: base situation (rural texture), 1960 urban texture and 2019 texture (after renewal). In this study, in which the building envelope is kept constant, the effect of the urban texture on the building energy consumption is clearly observed. According to the results of the study, lighting and heating energy consumption of the reference building increased during the transition from rural to 1960 texture. With the urban transformation law numbered 6306 enacted in 2012, it would be possible to save energy by optimizing the urban texture. However, in practice, it is seen that energy consumption of the reference building is increased more in the transformation from the 1960 texture to the 2019 texture. In other words, texture change has increased energy consumption. One of the goals of this high-cost transformation process, which is necessarily experienced with earthquake risk in the first place, was stated as providing energy savings. For this purpose, envelope insulation is mandatory in reconstructed buildings. However, independent of the building envelope, the characteristics of the urban texture also play an important role in energy consumption. For this reason, the optimization of the urban texture should be evaluated as a part of the transformation process and legal regulations should be implemented to support this. Potential impact analysis should be done before intervening in the urban texture.

Demonstration Project Analysis of Energy Saving Renovation for Existing Building

2012 ◽  
Vol 450-451 ◽  
pp. 1461-1466
Author(s):  
Ling Wang ◽  
Wen Ling Tian ◽  
Yi Zhang ◽  
Pei Chen
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Heat Supply System ◽  
Building Energy ◽  
Building Envelope ◽  
Building Energy Efficiency ◽  
Existing Buildings ◽  
Existing Building ◽  
The Sustainable Development ◽  
Project Analysis

Building energy efficiency is quite important for the sustainable development of our community.Based on the analysis of the building environment,building envelope,energy consumption of existing buildings and the economic condition of the region in Tangshan,the energy - saving renovation measures of building envelope and heat supply system is decided. Then the energy consumption of the energy - saving renovated building is analysed to verify the renovation results. The measures proposed can be one solution of energy-saving renovation in north region.

Impact of roof shading on building energy performance in warm & humid climatic places of India

2020 ◽  
pp. 50-64
Author(s):  
Kuladeep Kumar Sadevi ◽  
Avlokita Agrawal
Keyword(s):  
Energy Consumption ◽  
Energy Conservation ◽  
Energy Performance ◽  
General Assumption ◽  
Climatic Conditions ◽  
Building Envelope ◽  
Passive Cooling ◽  
Base Case ◽  
U Value ◽  
The Impact

With the rise in awareness of energy efficient buildings and adoption of mandatory energy conservation codes across the globe, significant change is being observed in the way the buildings are designed. With the launch of Energy Conservation Building Code (ECBC) in India, climate responsive designs and passive cooling techniques are being explored increasingly in building designs. Of all the building envelope components, roof surface has been identified as the most significant with respect to the heat gain due to the incident solar radiation on buildings, especially in tropical climatic conditions. Since ECBC specifies stringent U-Values for roof assembly, use of insulating materials is becoming popular. Along with insulation, the shading of the roof is also observed to be an important strategy for improving thermal performance of the building, especially in Warm and humid climatic conditions. This study intends to assess the impact of roof shading on building’s energy performance in comparison to that of exposed roof with insulation. A typical office building with specific geometry and schedules has been identified as base case model for this study. This building is simulated using energy modelling software ‘Design Builder’ with base case parameters as prescribed in ECBC. Further, the same building has been simulated parametrically adjusting the amount of roof insulation and roof shading simultaneously. The overall energy consumption and the envelope performance of the top floor are extracted for analysis. The results indicate that the roof shading is an effective passive cooling strategy for both naturally ventilated and air conditioned buildings in Warm and humid climates of India. It is also observed that a fully shaded roof outperforms the insulated roof as per ECBC prescription. Provision of shading over roof reduces the annual energy consumption of building in case of both insulated and uninsulated roofs. However, the impact is higher for uninsulated roofs (U-Value of 3.933 W/m2K), being 4.18% as compared to 0.59% for insulated roofs (U-Value of 0.33 W/m2K).While the general assumption is that roof insulation helps in reducing the energy consumption in tropical buildings, it is observed to be the other way when insulation is provided with roof shading. It is due to restricted heat loss during night.

scholarly journals Experimental Study on the Thermal Behavior of Exterior Coating Textures of Building in Hot and Arid Climates

2021 ◽  
Vol 13 (8) ◽  
pp. 4175
Author(s):  
Islam Boukhelkhal ◽  
Fatiha Bourbia
Keyword(s):  
Energy Consumption ◽  
Surface Temperature ◽  
External Surface ◽  
Thermal Characteristics ◽  
Energy Performance ◽  
Building Envelope ◽  
Interior Space ◽  
Design Elements ◽  
Aesthetic Appearance ◽  
Reduction Of Energy Consumption

The building envelope is the barrier between the interior and exterior environments. It has many important functions, including protecting the interior space from the climatic variations through its envelope materials and design elements, as well as reduction of energy consumption and improving indoor thermal comfort. Furthermore, exterior building sidings, in addition to their aesthetic appearance, can have useful textures for reducing solar gains and providing good thermal insulation performance. This research examined and evaluated the effect of external siding texture and geometry on energy performance. For this objective, a field in situ testing and investigation of surface temperature was carried out on four samples (test boxes) with different exterior textures and different orientations, under the climate zone of Constantine–Algeria during the summer period. The results indicated significant dependability between the exterior texture geometry, the percentage of shadow projected, and external surface temperature. The second part of the research involved a similar approach, exploring the effect of three types of particles with the same appearance but with different thermal characteristics. It was concluded that the natural plant aggregates “palm particles” had the best performance, which contributed to a significant reduction of external surface temperature reaching 4.3 °C, which meant decreasing the energy consumption.

Energy Saving Technology for Doors and Windows of the Building

2014 ◽  
Vol 1056 ◽  
pp. 128-130
Author(s):  
Fu Yun Yang
Keyword(s):  
Energy Saving ◽  
Indoor Environment ◽  
Energy Performance ◽  
Building Envelope ◽  
Energy Performance Of Buildings ◽  
Summer Heat ◽  
Energy Saving Technology ◽  
Heat Preservation

Doors and windows of the building is an important part of the building envelope. AS the transparent and open envelope of the building, doors and windowsare the weakest part in the winter and summer heat preservation. It directly affects the energy performance of buildings. Therefore, do a good job of building doors and windows energy saving is an important way to optimize the indoor environment and realize energy saving.

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.

OPTIMAL ENERGY DESIGN AND RETROFIT RECOMMENDATIONS FOR THE TURKISH BUILDING SECTOR

2021 ◽  
Vol 16 (1) ◽  
pp. 61-90
Author(s):  
Selçuk Sayin ◽  
Godfried Augenbroe
Keyword(s):  
Energy Saving ◽  
Large Scale ◽  
Optimal Strategies ◽  
Energy Performance ◽  
Optimization Approach ◽  
Investment Strategies ◽  
Single Family ◽  
Building Sector ◽  
Design Standards ◽  
The Cost

ABSTRACT This paper introduces methodologies and optimal strategies to reduce the energy consumption of the building sector with the aim to reduce global energy usage of a given .region or country. Many efforts are underway to develop investment strategies for large-scale energy retrofits and stricter energy design standards for existing and future buildings. This paper presents a study that informs these strategies in a novel way. It introduces support for the cost-optimized retrofits of existing, and design improvements of new buildings in Turkey with the aim to offer recommendations to individual building owners as well as guidance to the market. Three building types, apartment, single-family house and office are analyzed with a novel optimization approach. The energy performance of each type is simulated in five different climate regions of Turkey and four different vintages. For each vintage, the building is modelled corresponding to local Turkish regulations that applied at the time of construction. Optimum results are produced for different goals in terms of energy saving targets. The optimization results reveal that a 50% energy saving target is attainable for the retrofit and a 40% energy saving target is attainable for new design improvements for each building type in all climate regions.

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