scholarly journals Energy, Economic, and Environmental Performance of a Single-Family House in Chile Built to Passivhaus Standard

2021 ◽  
Vol 13 (3) ◽  
pp. 1199
Author(s):  
Camilo Bravo-Orlandini ◽  
José M. Gómez-Soberón ◽  
Claudia Valderrama-Ulloa ◽  
Francisco Sanhueza-Durán
Keyword(s):  
Energy Consumption ◽  
Environmental Performance ◽  
Energy Demand ◽  
Energy Use ◽  
Initial Step ◽  
Energy Performance ◽  
Primary Energy ◽  
Single Family ◽  
Passive Strategies ◽  
Heating Energy Demand

The energy consumption of buildings accounts for 22% of total global energy use and 13% of global greenhouse gas emissions. In this context, this study aims to evaluate the energy, economic, and environmental performance of housing in Chile built according to the Passivhaus (PH) standard. The standard was applied to housing in eight representative climate zones with a single-family residence as reference. The analysis incorporated passive strategies, which are considered as pillars of the PH. The energy performance was analyzed using the Passive House Planning Package software (PHPP), version 9.6a. The results showed that when every passive strategy is implemented, the heating energy demand decreases by 93%, while the refrigeration demand is nonexistent. These results were achieved through a 37% increase in the overall initial budget investment, which will be amortized over an 11-year period. In this way, the primary energy consumption is reduced by 32% and, correspondingly, CO2 emissions are reduced by 39%. In modern Chile, it is difficult (but not impossible) to incorporate PH. However, governmental programs and aids could represent an initial step. Therefore, this research will help to identify strategies for incorporating PH in Chile, with the aim of improving the energy performance of housing.

scholarly journals Additional requirement to the Swedish nearly zero energy requirements

2021 ◽  
Vol 246 ◽  
pp. 14002
Author(s):  
Åsa Wahlström ◽  
Mari-Liis Maripuu
Keyword(s):  
Energy Demand ◽  
Energy Use ◽  
Primary Energy ◽  
Building Envelope ◽  
Net Energy ◽  
Single Family ◽  
Qualitative Properties ◽  
Advantages And Disadvantages ◽  
Additional Requirement ◽  
Starting Point

This study has analysed which options would be appropriate to use as additional requirements to the main requirement of primary energy number in the new Swedish building regulations. The starting point is to ensure that buildings are built with good qualitative properties in terms of the building envelope so that low energy use can be maintained throughout the life of the building despite changes in installation systems or the building’s occupancy. The additional requirements should aim to minimize energy losses, i.e., to ensure that the building's total energy demand is low. The following possible additional requirements have been examined: net energy demand, net energy demand for heating, heat power demand, heat loss rate and average heat transfer coefficient. In order to ensure that the additional requirements will work as desired and to explore possibilities with, and identify the consequences of, the various proposals, calculations have been made for four different categories of buildings: single-family houses, apartment buildings, schools and offices. The results show that the suggested option net energy demand will not contribute to any additional benefits in relation to primary energy number. The other options analysed have both advantages and disadvantages and it is difficult to find a single additional requirement that fulfils all the pre-set demands.

scholarly journals Analysis of the Impact of Different Variables on the Energy Demand in Office Buildings

2020 ◽  
Vol 12 (13) ◽  
pp. 5347
Author(s):  
José Luis Fuentes-Bargues ◽  
José-Luis Vivancos ◽  
Pablo Ferrer-Gisbert ◽  
Miguel Ángel Gimeno-Guillem
Keyword(s):  
Energy Consumption ◽  
Energy Demand ◽  
Energy Use ◽  
Computer Software ◽  
Energy Performance ◽  
Point Of View ◽  
Regulatory Systems ◽  
Energy Behaviour ◽  
Balance Energy ◽  
The Impact

The design of near zero energy offices is a priority, which involves looking to achieve designs which minimise energy consumption and balance energy requirements with an increase in the installation and consumption of renewable energy. In light of this, some authors have used computer software to achieve simulations of the energy behaviour of buildings. Other studies based on regulatory systems which classify and label energy use also generally make their assessments through the use of software. In Spain, there is an authorised procedure for certifying the energy performance of buildings, and software (LIDER-CALENER unified tool) which is used to demonstrate compliance of the performance of buildings both from the point of view of energy demand and energy consumption. The aim of this study is to analyse the energy behaviour of an office building and the variability of the same using the software in terms of the following variables: climate zone, building orientation and certain surrounding wall types and encasements typical of this type of construction.

Architectural Elements with Respect to the Energy Performance of Buildings

2014 ◽  
Vol 1020 ◽  
pp. 561-565 ◽  
Author(s):  
Rastislav Ingeli ◽  
Katarína Minarovičová ◽  
Miroslav Čekon
Keyword(s):  
Energy Demand ◽  
Energy Use ◽  
Energy Performance ◽  
High Energy ◽  
Primary Energy ◽  
Zero Energy ◽  
Architectural Elements ◽  
Zero Energy Building ◽  
Very High Energy ◽  
Building Operation

Buildings account for 40% of the primary energy use and 24%of the generation of green house gases worldwide. Therefore, a reduction of the specific energy demand of buildings and increased use of renewable energy are important measures of climate change mitigation. On the 18th of May 2010 a recast of the EPBD was approved which further clarifies the intention that buildings shall have a low energy demand. The recast of the EPBD specifies that by the end of 2020 all new buildings shall be “nearly zero-energy buildings”. A nearly zero-energy building is defined as a building with a very high energy performance and very simple shape. The current focusing on the energy efficiency of the building operation may lead to uniform cuboid architecture with heavy insulated building envelopes. The paper deals with the influence of energy concept on architectural elements (and their properties as shape, material, colour, texture etc.)

scholarly journals ANALYSIS OF ENERGY DEMAND FOR LOW-ENERGY MULTI-DWELLING BUILDINGS OF DIFFERENT CONFIGURATION / SKIRTINGOS KONFIGŪRACIJOS MAŽAENERGIŲ DAUGIABUČIŲ PASTATŲ ENERGIJOS POREIKIŲ TYRIMAS

2014 ◽  
Vol 6 (4) ◽  
pp. 414-420 ◽  
Author(s):  
Giedrė Streckienė ◽  
Elena Polonis
Keyword(s):  
Energy Demand ◽  
Energy Savings ◽  
Energy Performance ◽  
Primary Energy ◽  
Low Energy ◽  
Single Family ◽  
Energy Performance Of Buildings ◽  
New Energy ◽  
Concrete Blocks ◽  
Family House

To meet the goals established by Directive 2010/31/EU of the European Parliament and of the Council on the energy performance of buildings, the topics of energy efficiency in new and old buildings must be solved. Research and development of new energy solutions and technology are necessary for increasing energy performance of buildings. Three low-energy multi-dwelling buildings have been modelled and analyzed in the presented study. All multi-dwelling houses are made of similar single-family house cells. However, multi-dwelling buildings are of different geometry, flat number and height. DesignBuilder software was used for simulating and determining heating, cooling and electricity demand for buildings. Three different materials (silicate, ceramic and clay concrete blocks) as bearing constructions of external walls have been analyzed. To decrease cooling demand for buildings, the possibility of mounting internal or external louvers has been considered. Primary energy savings for multi-dwelling buildings using passive solar measures have been determined. Norint pasiekti Europos Sąjungos direktyvos 2010/31/EB tikslus dėl pastatų energinio naudingumo, reikia spręsti energijos efektyvumo klausimus naujų ir esamų pastatų srityje. Naujų energinių sprendinių ir technologijų tyrimai bei plėtra būtini norint padidinti pastatų energinį naudingumą. Šiame tyrime modeliuojami ir analizuojami trys mažaenergiai daugiabučiai pastatai. Visi jie sudaryti iš vienodo dydžio butų, tačiau pastatai tarpusavyje skiriasi geometrija, butų skaičiumi ir aukštingumu. Siekiant nustatyti ir išnagrinėti pastatų šilumos, vėsos ir elektros energijos poreikius, naudotasi DesignBuilder programa. Visų daugiabučių pastatų atvejais nagrinėjamos trys skirtingos išorės sienų laikančiųjų konstrukcijų medžiagos: silikatiniai, keraminiai ir keramzitbetonio blokeliai. Siekiant sumažinti vėsos poreikį pastatuose taip pat buvo analizuojama galimybė sumontuoti vidines arba išorines žaliuzes. Nustatyti sutaupytieji pirminės energijos kiekiai daugiabučių pastatų atvejams taikant pasyviąsias apsaugos nuo saulės priemones.

scholarly journals Toward Energy Savings in Campus Buildings under a Life Cycle Thinking Approach

2020 ◽  
Vol 10 (20) ◽  
pp. 7123
Author(s):  
Ricardo Abejón ◽  
Jara Laso ◽  
Marta Rodrigo ◽  
Israel Ruiz-Salmón ◽  
Mario Mañana ◽  
...  
Keyword(s):  
Life Cycle ◽  
Energy Consumption ◽  
Energy Use ◽  
Energy Savings ◽  
Raw Materials ◽  
Energy Performance ◽  
Primary Energy ◽  
Point Of View ◽  
Life Cycle Thinking ◽  
Building Industry

Recent studies have identified that buildings all over the world are great contributors to energy consumption and greenhouse gas emissions. The relationship between the building industry and environmental pollution is continuously discussed. The building industry includes many phases: extraction of raw materials, manufacturing, construction, use, and demolition. Each phase consumes a large amount of energy, and subsequent emissions are released. The life cycle energy assessment (LCEA) is a simplified version of the life cycle assessment (LCA) that focuses only on the evaluation of energy inputs for different phases of the life cycle. Operational energy is the energy required for day-to-day operation processes of buildings, such as heating, cooling and ventilation systems, lighting, as well as appliances. This use phase accounts for the largest portion of energy consumption of the life cycle of conventional buildings. In addition, energy performance certification of buildings is an obligation under current European legislation, which promotes efficient energy use, so it is necessary to ensure that the energy performance of the building is upgraded to meet minimum requirements. For this purpose, this work proposes the consideration of the energy impacts and material resources used in the operation phase of a building to calculate the contribution of these energy impacts as new variables for the energy performance certification. The application of this new approach to the evaluation of university buildings has been selected as a case study. From a methodological point of view, the approach relied on the energy consumption records obtained from energy and materials audit exercises with the aid of LCA databases. Taking into practice the proposed methodology, the primary energy impact and the related emissions were assessed to simplify the decision-making process for the energy certification of buildings. From the results obtained, it was concluded that the consumption of water and other consumable items (paper) are important from energy and environmental perspectives.

Assessment of the Life Cycle Energy Efficiency of a Primary School Building in Turkey

2019 ◽  
Vol 887 ◽  
pp. 335-343
Author(s):  
Nazanin Moazzen ◽  
Mustafa Erkan Karaguler ◽  
Touraj Ashrafian
Keyword(s):  
Energy Efficiency ◽  
Life Cycle ◽  
Energy Consumption ◽  
Energy Demand ◽  
Energy Use ◽  
Human Life ◽  
Energy Performance ◽  
Building Envelope ◽  
Embodied Energy

Energy efficiency has become a crucial part of human life, which has an adverse impact on the social and economic development of any country. In Turkey, it is a critical issue especially in the construction sector due to increase in the dependency on the fuel demands. The energy consumption, which is used during the life cycle of a building, is a huge amount affected by the energy demand for material and building construction, HVAC and lighting systems, maintenance, equipment, and demolition. In general, the Life Cycle Energy (LCE) needs of the building can be summarised as the operational and embodied energy together with the energy use for demolition and recycling processes.Besides, schools alone are responsible for about 15% of the total energy consumption of the commercial building sector. To reduce the energy use and CO2 emission, the operational and embodied energy of the buildings must be minimised. Overall, it seems that choosing proper architectural measures for the envelope and using low emitting material can be a logical step for reducing operational and embodied energy consumptions.This paper is concentrated on the operating and embodied energy consumptions resulting from the application of different architectural measures through the building envelope. It proposes an educational building with low CO2 emission and proper energy performance in Turkey. To illustrate the method of the approach, this contribution illustrates a case study, which was performed on a representative schoold building in Istanbul, Turkey. Energy used for HVAC and lighting in the operating phase and the energy used for the manufacture of the materials are the most significant parts of embodied energy in the LCE analyses. This case study building’s primary energy consumption was calculated with the help of dynamic simulation tools, EnergyPlus and DesignBuilder. Then, different architectural energy efficiency measures were applied to the envelope of the case study building. Then, the influence of proposed actions on LCE consumption and Life Cycle CO2 (LCCO2) emissions were assessed according to the Life Cycle Assessment (LCA) method.

scholarly journals Analysis of the Effects of Strengthening Building Energy Policy on Multifamily Residential Buildings in South Korea

2020 ◽  
Vol 12 (9) ◽  
pp. 3566
Author(s):  
Byung Chang Kwag ◽  
Sanghee Han ◽  
Gil Tae Kim ◽  
Beobjeon Kim ◽  
Jong Yeob Kim
Keyword(s):  
Energy Consumption ◽  
South Korea ◽  
Energy Policy ◽  
Energy Demand ◽  
Residential Buildings ◽  
Building Energy ◽  
Energy Performance ◽  
Primary Energy ◽  
Building Envelope ◽  
Primary Energy Consumption

The purposes of this study were to overview the building-energy policy and regulations in South Korea to achieve energy-efficient multifamily residential buildings and analyze the effects of strengthening the building design requirements on their energy performances. The building energy demand intensity showed a linear relationship with the area-weighted average U-values of the building envelope. However, improving the thermal properties of the building envelope was limited to reducing the building-energy demand intensity. In this study, the effects of various energy conservation measures (ECMs) on the building-energy performance were compared. Among the various ECMs, improving the boiler efficiency was found to be the most efficient measure for reducing the building-energy consumption in comparison to other ECMs, whereas the building envelope showed the least impact, because the current U-values are low. However, in terms of the primary energy consumption, the most efficient ECM was the lighting power density because of the different energy sources used by various ECMs and the different conversion factors used to calculate the primary energy consumption based on the source type. This study showed a direction for updating the building-energy policy and regulations, as well as the potential of implementing ECMs, to improve the energy performances of Korean multifamily residential buildings.

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 Determining The Effect Of Building Geometry On Energy Use Patterns Of Office Developments

2021 ◽  
Author(s):  
Tonima Ferdous
Keyword(s):  
Energy Consumption ◽  
Energy Demand ◽  
Energy Use ◽  
Energy Performance ◽  
Design Parameters ◽  
Use Patterns ◽  
Aspect Ratios ◽  
Building Geometry ◽  
Use Values ◽  
Solar Control

The project investigates potentials of building geometry to minimize energy consumption in office developments. Five distinct building geometries are developed to represent mid-size office occupancies in the context of Toronto (located at southern Ontario, Canada). A square, a rectangle elongated on eastwest, a rectangle elongated on north- south, an H-shape, and a cruciform are examined with varied design parameters; such as: window to wall ratio and external static solar control devices (horizontal overhangs and vertical fins). The IES VE software is applied to predict the yearly energy consumption results for 40 analysis permutations. The outcome of this research shows that, the deviation of energy use values from one shape to another is relatively small. In addition to that, window to wall ratio appears slightly overpowering on the energy use pattern of a building than its shape. Shading design is found particularly helpful in reducing cooling energy demand in offices spaces. Overall, the energy performance of five archetypes is observed to comply with individual building aspect ratios (i.e. compactness). Thus, the findings of this project are expected to provide useful guidelines to the architects to utilize building geometry as an energy saving measure when designing office buildings.

scholarly journals Determining The Effect Of Building Geometry On Energy Use Patterns Of Office Developments

2021 ◽  
Author(s):  
Tonima Ferdous
Keyword(s):  
Energy Consumption ◽  
Energy Demand ◽  
Energy Use ◽  
Energy Performance ◽  
Design Parameters ◽  
Use Patterns ◽  
Aspect Ratios ◽  
Building Geometry ◽  
Use Values ◽  
Solar Control

The project investigates potentials of building geometry to minimize energy consumption in office developments. Five distinct building geometries are developed to represent mid-size office occupancies in the context of Toronto (located at southern Ontario, Canada). A square, a rectangle elongated on eastwest, a rectangle elongated on north- south, an H-shape, and a cruciform are examined with varied design parameters; such as: window to wall ratio and external static solar control devices (horizontal overhangs and vertical fins). The IES VE software is applied to predict the yearly energy consumption results for 40 analysis permutations. The outcome of this research shows that, the deviation of energy use values from one shape to another is relatively small. In addition to that, window to wall ratio appears slightly overpowering on the energy use pattern of a building than its shape. Shading design is found particularly helpful in reducing cooling energy demand in offices spaces. Overall, the energy performance of five archetypes is observed to comply with individual building aspect ratios (i.e. compactness). Thus, the findings of this project are expected to provide useful guidelines to the architects to utilize building geometry as an energy saving measure when designing office buildings.

Sign in / Sign up

Export Citation Format

Share Document