Building Integrated Photovoltaic: Building Envelope Material and Power Generator for Energy-Efficient Buildings

2018 ◽  
pp. 109-129
Author(s):  
Karunesh Kant ◽  
Amritanshu Shukla ◽  
Atul Sharma
Keyword(s):  
Energy Efficient ◽  
Building Envelope ◽  
Power Generator ◽  
Energy Efficient Buildings ◽  
Building Integrated Photovoltaic ◽  
Envelope Material

scholarly journals BIM and BEM Methodologies Integration in Energy-Efficient Buildings Using Experimental Design

Buildings ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 491
Author(s):  
Jorge González ◽  
Carlos Alberto Pereira Soares ◽  
Mohammad Najjar ◽  
Assed N. Haddad
Keyword(s):  
Experimental Design ◽  
Energy Efficient ◽  
Thermal Characteristics ◽  
Energy Performance ◽  
Building Envelope ◽  
Climatic Zones ◽  
Energy Efficient Buildings ◽  
Energy Modelling ◽  
Building Information ◽  
Energetic Performance

Linking Building Information Modelling and Building Energy Modelling methodologies appear as a tool for the energy performance analysis of a dwelling, being able to build the physical model via Autodesk Revit and simulating the energy modeling with its complement Autodesk Insight. A residential two-story house was evaluated in five different locations within distinct climatic zones to reduce its electricity demand. Experimental Design is used as a methodological tool to define the possible arrangement of results emitted via Autodesk Insight that exhibits the minor electric demand, considering three variables: Lighting efficiency, Plug-Load Efficiency, and HVAC systems. The analysis concluded that while the higher the efficiency of lighting and applications, the lower the electric demand. In addition, the type of climate and thermal characteristics of the materials that conform to the building envelope have significant effects on the energetic performance. The adjustment of different energetic measures and its comparison with other climatic zones enable decision-makers to choose the best combination of variables for developing strategies to lower the electric demand towards energy-efficient buildings.

Possible Solutions for Ground Slabs of Energy Efficient Buildings

2014 ◽  
Vol 1041 ◽  
pp. 105-108
Author(s):  
Anna Sedláková ◽  
Pavol Majdlen ◽  
Ladislav Ťažký
Keyword(s):  
Energy Efficiency ◽  
Heat Flow ◽  
Thermal Comfort ◽  
Energy Efficient ◽  
Direct Contact ◽  
Thermal State ◽  
Building Envelope ◽  
Heat Losses ◽  
Internal Environment ◽  
Energy Efficient Buildings

The building envelope is a barrier that separates the internal environment from the effects of weather. This barrier ought to facilitate the optimal comfort of the interior environment in winter as well as summer. It has been shown in practice that most building defects occur within the building envelope. This includes external walls, roofs and floors too, and is impartial to new or renovated buildings. Heat losses of buildings through external constructions – roof, external walls, ground slabs are not negligible. It is therefore important to pay more attention to these construction elements. Basementless buildings situated on the ground are in direct contact with the subgrade and its thermal state. An amount of heat primarily destined for the creation of thermal comfort in the interior escapes from the baseplate to the cooler subgrade. The outgoing heat represents heat losses, which unfavourably affect the overall energy efficiency of the building. The heat losses represent approximately 15 to 20 % of the overall heat losses of the building. This number is a clear antecedent for the need to isolate and minimalize heat flow from the building to the subgrade.

The Importance of a Fan Location in the Front Door in Measuring of the Air Permeability by the Blower Door Test

2013 ◽  
Vol 649 ◽  
pp. 125-128 ◽  
Author(s):  
Barbora Hrubá ◽  
Marcela Černíková ◽  
Lucie Kucerova ◽  
Lubomír Martiník
Keyword(s):  
Energy Efficient ◽  
Evaluation Criteria ◽  
Air Permeability ◽  
Building Envelope ◽  
Measuring Device ◽  
Front Door ◽  
Energy Efficient Buildings ◽  
Timber Construction ◽  
Weak Part

The value of air permeability, or the value of n50 provides important information about the impermeability of the building envelope and thus the quality of internal environment of the building. It is also one of the main evaluation criteria in classifying energy efficient buildings. Air permeability is determined by Blower Door Test where the fan blows air in or out from the measured area. The measurement is performed in a overpressure and afterwards in a underpressure during which the leaks are detected. The frame is usually placed into the front door which themselves is a weak part in the building envelope, and thus the rate of leakage completely denies. The effect of leakage of the front door is so significant that it can often cause a misclassification of the energy efficient buildings. We have tested this hypothesis by Blower Door Test on a passive timber construction build in 2007 during which we have measured the object in position of measuring device placed in the front door and the balcony door that are not encumbered by leaks caused by a security hardware and by other specific elements

Indoor Thermal Environment Simulation by Using MATLAB and Simulink

2010 ◽  
Vol 29-32 ◽  
pp. 2785-2788
Author(s):  
Jian Yao ◽  
Jin Xu
Keyword(s):  
Energy Efficient ◽  
Indoor Environment ◽  
Thermal Environment ◽  
Building Envelope ◽  
Cold Winter ◽  
Performance Simulation ◽  
Application Study ◽  
Indoor Thermal Environment ◽  
Energy Efficient Buildings ◽  
Environment Simulation

To compare the indoor thermal environment under different building envelope constructions, a Matlab-based tool was presented for building envelope performance simulation. An application study of two cases illustrates energy efficient buildings can provide more suitable indoor environment than non-energy efficient buildings in cold winter and hot summer. In conclusion, this paper provides a new and fast way for the prediction of indoor thermal environment.

scholarly journals Comparative analysis of radon concentrations in buildings of different energy efficiency classes on example of five Russian cities

2020 ◽  
Vol 13 (2) ◽  
pp. 47-56
Author(s):  
I. V. Yarmoshenko ◽  
A. D. Onishchenko ◽  
G. P. Malinovsky ◽  
A. V. Vasilyev ◽  
E. I. Nazarov ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Comparative Analysis ◽  
Radon Concentration ◽  
Energy Efficient ◽  
Residential Buildings ◽  
High Energy ◽  
Building Envelope ◽  
Soviet Period ◽  
Energy Efficient Buildings ◽  
Radon Concentrations

A comparative analysis of the radon concentrations in modern multi-storey residential buildings of high energy efficiency class and buildings typical for urban areas of the twentieth century was carried out. The study was conducted in Russian cities located in various climatic zones – Ekaterinburg, Krasnodar, St. Petersburg, Salekhard, Chelyabinsk. The radon concentration in samples of buildings was measured using integrated radon radiometers based on nuclear track detectors according to a single method. The surveyed sample included 498 apartments in multi-apartment buildings. Among all the examined building types, the highest average radon concentration is observed in modern energy-efficient houses – 43 Bq/m3. In other types of buildings, the following average radon concentrations were obtained: brick 2–5 floors – 35 Bq/m3; panel 5 floors – 32 Bq/m3; panel 7–12 floors 1970-1990 years of construction – 22 Bq/m3; brick> 5 floors 1970–1980 years of construction – 20 Bq m3; panel, built since 1990 – 24 Bq/m3. The results of the study confirm the assumption that radon concentration in modern multi-storey energy-efficient houses is on average higher than in typical residential buildings of the Soviet period. The increased accumulation of radon in energy-efficient buildings is associated with a decrease in the building envelope permeability and the contribution of fresh air to the general air exchange. Despite the fact that there were no cases of exceeding hygienic standards for the indoor radon concentration in the framework of this study, the higher radon concentration in buildings of increased energy efficiency requires attention from the point of view of implementing the principle of optimization of radiation protection. In the future, extensive construction of energy-efficient buildings may increase the average and collective doses to the urban population in the Russian Federation.

Diagnostics of Current Developments in the Field of Building Airtightness

2014 ◽  
Vol 501-504 ◽  
pp. 2227-2230 ◽  
Author(s):  
Michal Kraus ◽  
Darja Kubečková
Keyword(s):  
Sustainable Development ◽  
Energy Balance ◽  
Heat Loss ◽  
Energy Efficient ◽  
Qualitative Method ◽  
Building Envelope ◽  
Basic Principles ◽  
Energy Efficient Buildings ◽  
Recent Developments

One of the basic principles of energy efficient buildings in accordance with sustainable development is perfectly airtight building envelope. Oversized heat loss through the building envelope leakage adversely affects the energy balance of buildings. The paper provides diagnostic of the recent developments in airtightness of buildings using qualitative method. The aim of this paper is to draw conclusions - dependences, definitions of weak and strong points of the process, their causes and consequences.

Influence of Thermal Break Element Applied in Balcony Slab on Internal Surface Temperature

2014 ◽  
Vol 1057 ◽  
pp. 79-86
Author(s):  
Peter Buday ◽  
Rastislav Ingeli ◽  
Miroslav Čekon
Keyword(s):  
Energy Efficient ◽  
Energy Use ◽  
Internal Surface ◽  
Building Envelope ◽  
Cold Climate ◽  
Energy Efficient Buildings ◽  
Thermal Bridge ◽  
Advanced Analysis ◽  
Thermal Bridges ◽  
Energy Efficient Building

Reduction of energy use in buildings is an important measure to achieve climate change mitigation. It is essential to minimize heat losses when designing and building energy efficient buildings. For an energy-efficient building in a cold climate, a large part of the space heating demand is caused by transmission losses through the building envelope. To achieve this, it is necessary to have processed a detailed design of buildings. Thermal bridges have to be eliminated in the design of buildings. Thermal bridges occur as point ones or linear. One of the specific details that create thermal leakage is located in balcony slabs. The balcony is one of the main reasons of the increased heat loss of buildings. The presence of thermal bridge in constructions of balcony envelopes influences the energy consumption, durability of the building envelopes, and also the thermal comfort of occupants. This paper is focused on advanced analysis of thermal performance of thermal break element applied in balcony slab with parametric correlation to the thermal properties of wall building envelope.

scholarly journals Envelope Life Cycle Costing of Energy-Efficient Buildings in Ukraine

2019 ◽  
Vol 8 (10) ◽  
pp. 2314-2321
Keyword(s):  
Energy Efficiency ◽  
Life Cycle ◽  
Energy Efficient ◽  
Life Cycle Cost ◽  
Building Envelope ◽  
Problem Analysis ◽  
Regulatory Documents ◽  
Thermal Insulating ◽  
Energy Efficient Buildings ◽  
Feasible Solutions

The article describes main points and characteristics of the building envelope design considering life-cycle cost and compliance with the codes for energy efficiency parameters in Ukraine. This article contains of the problem analysis of the requirements development for the energy-efficient buildings parameters in Ukraine considering life-cycle cost in the walling design. The structural concepts for the thermal insulation of building exterior walls and roof coatings and their impact on energy efficiency are considered. Designing rational structural concepts for thermal insulating envelope of energy-efficient buildings. The role of the life cycle cost criterion in making decisions on the choice of building envelope is clarified. Analysis of activities, publications and regulatory documents in Ukraine and the EU-countries for the design of rational thermal insulating building envelope considering life-cycle cost to reducing energy consumption. The requirements of regulatory documents on the design of energy-efficient buildings in Ukraine are systematized. The variants of construction solutions for building envelope are considered in terms of the life-cycle cost and energy saving requirements. The tasks of choosing optimal solutions for enclosing structures of external walls and building coatings are multicriteria of a cardinal choice of alternatives with different important measures from a finite set of feasible solutions when considering a weakly structured problem with clearly defined separated parameters. Thermal insulating building envelope using modern insulation systems should be used in all types of buildings.

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