scholarly journals Experimental and Numerical Energy Assessment of a Monolithic Aerogel Glazing Unit for Building Applications

2019 ◽  
Vol 9 (24) ◽  
pp. 5473 ◽  
Author(s):  
Cinzia Buratti ◽  
Elisa Moretti ◽  
Elisa Belloni ◽  
Michele Zinzi
Keyword(s):  
Energy Demand ◽  
Residential Building ◽  
Thermal Characterization ◽  
New Production ◽  
Dynamic Simulations ◽  
Building Envelopes ◽  
Energy Assessment ◽  
Rapid Supercritical Extraction ◽  
Heating Energy Demand

In the last few decades, the attention of researchers has been focused on the characterization of aerogels in order to improve the thermal performance of transparent building envelopes. Granular aerogel is already spread in the market thanks to the easy manufacturing system, whereas the difficulty in producing monoliths without defects, cracks, and inhomogeneity limited the diffusion of monolithic aerogel systems. A new production process for the monolithic panels was developed at Union College (Schenectady, NY, USA); it is a rapid supercritical extraction technique which allows a reduction in production time (only a few hours) and results in less solvent waste. Panes with maximum dimensions of about 100 × 100 mm were fabricated and composed in a unique glazing system, with external dimensions 300 × 300 mm. The thermal characterization of the innovative monolithic aerogel glazing system (simple float glazing 4.7-mm-thick monolithic aerogel pane 15-mm-thick simple float glazing 4.7 mm thick), which was carried out by means of a Small Hot Box apparatus, showed a thermal transmittance value of about 1.1 W/(m2K). Data was used in dynamic simulations of a typical non-residential building. They showed that the new investigated solution allows a valuable reduction with respect to a low-e double glazing system in terms of heating energy demand (about 5–7% for Helsinki, 8–12% for Paris, and 10–15% for Turin), for different window-to-wall ratios.

scholarly journals Mechanical characterization of a concrete masonry block enhanced with micro-encapsulated phase changing materials

2021 ◽  
Vol 2042 (1) ◽  
pp. 012184
Author(s):  
Talal Salem ◽  
Mohamad Kazma ◽  
Judy Bitar ◽  
Joseph Moussa ◽  
Dalia Falah
Keyword(s):  
Energy Demand ◽  
Mechanical Characterization ◽  
Thermal Characterization ◽  
Building Envelope ◽  
Building Performance ◽  
Masonry Unit ◽  
Building Envelopes ◽  
Concrete Masonry ◽  
Concrete Mix

Abstract Global energy demand has been increasing exponentially in the last three decades, which has been exacerbated by climate change. To alleviate the energy load, researchers have been exploring innovative passive techniques to enhance the thermal performance of building envelopes. This research evaluates a novel building envelope solution, which includes the development of a Concrete Masonry Unit that is integrated with bio-based micro-encapsulated Phase Changing Materials. The mechanical behaviour of the enhanced CMU is investigated to study the applicability of PCMs into the no-slump concrete mix. Compatibility with the applicable standards opens a broader prospect for thermal characterization and building performance simulations of PCM enhanced CMU building envelopes.

scholarly journals PCSP’s Diagonal Tie Connectors Thermal Bridges Impact on Energy Performance and Operational Cost: Case Study of a High-Rise Residential Building in Estonia

2020 ◽  
Vol 172 ◽  
pp. 08006
Author(s):  
Martin Kiil ◽  
Martin-Sven Käärid ◽  
Paul Klõšeiko ◽  
Karl-Villem Võsa ◽  
Raimo Simson ◽  
...  
Keyword(s):  
Energy Demand ◽  
Residential Building ◽  
Energy Performance ◽  
Relative Increase ◽  
Dynamic Simulations ◽  
Climatic Regions ◽  
High Rise ◽  
Thermal Bridge ◽  
Heating Energy Demand ◽  
Air Circulation

This study analyses the effect of air circulation around diagonal tie connectors in precast sandwich panels on heating energy demand, energy performance value and heating costs of a sample residential building. Dynamic simulations were performed using 4 different climatic boundary conditions: Estonian test reference year, Estonian 48-year weather dataset as well as data from Eastern Germany and Northern Finland. The results show that the effect of the thermal bridge is most noticeable in total room heating energy demand (increase of 10.3%), while the influence on energy performance value was 1.1%. The relative increase of total room heating energy demand was similar (7.0-10.3%) in all studied climatic regions.

scholarly journals Quality Control of the Thermal Properties of Superstructures in Accommodation Spaces in Naval Constructions

2020 ◽  
Vol 12 (10) ◽  
pp. 4194
Author(s):  
David Bienvenido-Huertas ◽  
Juan Moyano ◽  
Carlos E. Rodríguez-Jiménez ◽  
Aurelio Muñoz-Rubio ◽  
Francisco Javier Bermúdez Rodríguez
Keyword(s):  
Quality Control ◽  
Heat Flow ◽  
Energy Demand ◽  
Scientific Literature ◽  
Thermal Characterization ◽  
Design Strategies ◽  
Flow Meter ◽  
Air Conditioning Systems ◽  
Heat Flow Meter

The application of passive design strategies in ships, such as the use of superstructures with high thermal insulation, allows the energy demand of heating, ventilation, and air conditioning systems to be reduced. There is a knowledge gap in the scientific literature on the possibilities to thermally characterize superstructures. Knowing such possibilities would make a methodology available for the quality control of naval constructions and for the inspection of the appropriate state of insulations in existing ships. For this purpose, a total of three different typologies of ship superstructures were monitored, and the data obtained were analyzed by using various existing approaches for the thermal characterization of façades: the heat flow meter method and temperature measurement methods. The results showed that the heat flow meter method constitutes a valid methodology to obtain representative results. In addition, guaranteeing a thermal gradient dependent of the wall typology and placing probes in zones not influenced by thermal bridges ensure that representative results are achieved.

Analysis of Material Solutions of Exterior Walls with Contact Thermal Insulation System

2014 ◽  
Vol 635 ◽  
pp. 165-168 ◽  
Author(s):  
Silvia Vilčeková ◽  
Anna Sedláková ◽  
Eva Kridlova-Burdova ◽  
Ladislav Ťažký
Keyword(s):  
Energy Demand ◽  
Fossil Fuel ◽  
Residential Building ◽  
Environmental Parameters ◽  
Design Stage ◽  
Exterior Wall ◽  
Insulation System ◽  
Wall Structures ◽  
Heating Energy Demand ◽  
Fossil Fuel Energy

Nowadays, heating energy demand has become a significant estimator used during the design stage of any new building. The residential building sector consumes a significant amount of fossil fuel energy and thereby produces a large percentage of greenhouse gas emissions that contribute to global warming and climate change. The aim of the paper is analysis of thermo-physical and environmental parameters of proposed versions of exterior wall structures.

scholarly journals Building energy analysis of an industrial hall based on dynamic simulations

2018 ◽  
Vol 9 (2) ◽  
pp. 145-151
Author(s):  
D. Szagri ◽  
B. Nagy
Keyword(s):  
Energy Consumption ◽  
Reinforced Concrete ◽  
Energy Demand ◽  
Industrial Building ◽  
Dynamic Simulations ◽  
Steel Fibre Reinforced Concrete ◽  
Roof Structure ◽  
Building Simulations ◽  
Coupled Heat And Moisture ◽  
Heating Energy Demand

The aim of the paper is primarily to evaluate the heating energy demand of an industrial hall. In the study, we have made multidimensional dynamic whole building simulations for describing coupled heat and moisture behaviour and energy consumption of the building with different internal loads and compared to the calculated energy consumption of the building according to the Hungarian and Austrian regulations. The walls and roof structure of the industrial building were made with insulated panel systems, the plinth wall was built with monolithic reinforced concrete with 12 cm of XPS insulation. The floor is made of steel fibre reinforced concrete, where 10 cm XPS perimeter insulation was applied. After the calculations, we insulated the floor on the whole surface with 10 cm XPS and investigated the modified structure’s heating energy demand too. In the paper, we analyse the energy consumption of the original and modified industrial building according to the monthly and seasonal calculations and the whole building dynamic simulations and evaluated the differences. Furthermore, we assessed the effect of internal loads, thermal bridges on the simulations.

scholarly journals Stochastic RCM-driven cooling and heating energy demand analysis for residential building

2022 ◽  
Vol 153 ◽  
pp. 111764
Author(s):  
Chuyin Tian ◽  
Guohe Huang ◽  
Joseph M. Piwowar ◽  
Shin-Cheng Yeh ◽  
Chen Lu ◽  
...  
Keyword(s):  
Energy Demand ◽  
Residential Building ◽  
Demand Analysis ◽  
Heating Energy Demand

Operational Energy Comparison of Concrete and Foamed Geopolymer Based Housing Envelopes

2017 ◽  
Author(s):  
José Luís Villalba ◽  
José Macías ◽  
Haci Baykara ◽  
Nestor Ulloa ◽  
Guillermo Soriano
Keyword(s):  
Thermal Conductivity ◽  
Energy Demand ◽  
Material Selection ◽  
Raw Materials ◽  
Construction Material ◽  
Residential Building ◽  
Thermal Characterization ◽  
Sustainable Construction ◽  
Scanning Calorimetry ◽  
Operational Energy

The present article provides an operational energy comparison of modern concrete and foamed geopolymers as envelope materials for single unit housing in Ecuador. The study is performed by replacing the concrete material used in the walls and roof elements with foamed geopolymer components. Residential building sector requires around 35.6% of the total energy demand in Ecuador. For this reason, efforts on building practices improvement are relevant for the Ecuadorian society. The foamed geopolymers are a mixture of aluminosilicate material obtained from Ecuadorian natural zeolite, group of alkaline activators and the foamed agent that when mixing the raw materials and obtain the geopolymer. To assess the potential use of foamed geopolymers as construction material, the annual energy demand for a social interest dwelling was obtained through simulation with EnergyPlus. Prefabricated Insulated Concrete Forms was established as the construction practice for the building model. Annual energy simulations were performed considering two Ecuadorian representative weathers, to Guayaquil and Quito locations. Material properties of foamed geopolymers ware acquired by own experimental facilities. Thermal conductivity was obtained with the use of the hot plate method, while specific heat by means of differential scanning calorimetry (DSC) analysis. This analysis uses foamed geopolymers obtained from two procedures. Thus, these proposed materials presented low density, low thermal conductivity, and acceptable compressive strength values. Finally, an assessment of natural geopolymers as a concrete replacement is presented, including a thermal characterization, and a sustainable construction evaluation. The findings affirm the key role of material selection in construction practices. Reductions around 4.0% in annual electricity demand was achieved for Guayaquil case, while energy consumption decreases around 1.3% for Quito.

Experimental thermal characterization of a Mediterranean residential building with PCM gypsum board walls

2013 ◽  
Vol 61 ◽  
pp. 93-103 ◽  
Author(s):  
I. Mandilaras ◽  
M. Stamatiadou ◽  
D. Katsourinis ◽  
G. Zannis ◽  
M. Founti
Keyword(s):  
Residential Building ◽  
Thermal Characterization ◽  
Gypsum Board
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