scholarly journals The Effect of Balcony Thermal Breaks on Building Thermal and Energy Performance: Field Experiments and Energy Simulations in Chicago, IL

Buildings ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 190
Author(s):  
Irina Susorova ◽  
Brent Stephens ◽  
Benjamin Skelton
Keyword(s):  
Energy Consumption ◽  
Thermal Resistance ◽  
High Performance ◽  
Energy Use ◽  
Field Experiments ◽  
Building Energy ◽  
Energy Performance ◽  
Curtain Wall ◽  
Energy Simulations

A common envelope performance problem in buildings is thermal bridging through balcony slab connections, which can be improved with the use of commercially available thermal break products. Several prior studies have used simulation-based and/or hot box test apparatus approaches to quantify the likely effect of balcony thermal breaks on effective thermal resistance of building enclosures. However, in-situ measurements of thermal performance in real buildings remain limited to date. This study uses a combination of field measurements and models to investigate the effects of installing balcony thermal breaks on the interior surface temperatures, effective thermal resistance, and annual building energy consumption. For the field experiment, yearlong measurements were conducted on the 13th floor of a 14-story multi-family building in Chicago, IL, in which thermocouple sensors were embedded into eight balconies and their adjacent interior floor slabs just before concrete was poured to complete the construction. The eight balconies included four control balconies without thermal breaks and four thermally-broken balconies with a commercially available thermal break product installed. The experimental data were then combined with 2-D heat transfer modeling and whole building energy simulations to investigate the impacts of the thermal break product installation on the envelope thermal resistance and overall energy use in the case study building as well as in several more generic building designs with simpler geometries. The results demonstrate that although the balcony thermal breaks helped regulate interior slab temperatures and improved the effective thermal resistance of the curtain wall enclosure assembly by an estimated ~14% in the case study building, the predicted effect on annual energy consumption in all modeled building types was small (i.e., less than 2%). The results also highlight the importance of paying careful attention to envelope design details when using thermal break products and considering the use of thermal break products in combination with other energy efficiency strategies to achieve high performance enclosures.

Dehumidification Strategies to Improve Energy Use at Retailers: A Case Study of a Supermarket Located in Guayaquil, Ecuador

2020 ◽  
Author(s):  
Jaqueline Litardo ◽  
Rubén Hidalgo-León ◽  
Paul Coronel ◽  
Andrea Damian ◽  
José Macías ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Energy Use ◽  
Building Energy ◽  
Energy Performance ◽  
Air Conditioner ◽  
Baseline Model ◽  
Air Conditioners ◽  
Frozen Food ◽  
Desiccant Wheel

Abstract This study aims to model and evaluate the energy performance of a supermarket located in Guayaquil, Ecuador. For this purpose, we modeled the baseline of the supermarket using EnergyPlus software. All input parameters used in the simulations were provided by the supermarket staff. Air-conditioners and refrigerated cases were modeled using the default templates in EnergyPlus but replacing the specifications of the site systems. The baseline model predicted, within ±10%, the energy consumption of the case study when compared to the real electricity bills of the building. Then, we incorporated a desiccant wheel for each of the air-conditioner units that supply the frozen food area. Results showed relevant reductions of about 52% in cooling energy by decreasing the humidity level from 70% to 40% with the use of desiccant systems. However, the introduction of these systems increased the total building energy consumption by about 3% due to the regeneration process.

Simulated and Actual Energy Use of a Green Building: A Case Study on the Magic School of Green Technology

2013 ◽  
Vol 368-370 ◽  
pp. 1174-1178 ◽  
Author(s):  
Tzu Ching Su ◽  
Yu Chung Wang ◽  
Hsien Te Lin
Keyword(s):  
Energy Use ◽  
Green Building ◽  
Building Energy ◽  
Energy Performance ◽  
Green Technology ◽  
Zero Carbon

This is a case study on the Magic school of Green Technology (MSGT), the first zero-carbon building in Taiwan. This study simulated the energy performance of the MSGT by using eQUEST, a tool for simulating building energy, before the construction was complete. This study compared the simulated energy use with the actual energy use of the MSGT in 2011, and determined that the actual energy use was lower than the simulated energy use. Based on this comparison, the study proved that the MSGT consumed 65% less energy than do similarly sized buildings with the same functions.

scholarly journals The application of the EN ISO 52016 standard and its Italian National Annex to assess the heating and cooling needs of a reference office building

2021 ◽  
Vol 312 ◽  
pp. 06003
Author(s):  
Franz Bianco Mauthe Degerfeld ◽  
Ilaria Ballarini ◽  
Giovanna De Luca ◽  
Vincenzo Corrado
Keyword(s):  
Building Energy ◽  
Energy Performance ◽  
Office Building ◽  
Dynamic Calculation ◽  
Building Stock ◽  
Existing Building ◽  
Building Energy Performance ◽  
Heating And Cooling ◽  
Energy Simulations

The EN ISO 52016-1 standard presents a new simplified dynamic calculation procedure, whose aim is to provide an accurate energy performance assessment without excessively increasing the number of data required. The Italian National Annex to EN ISO 52016-1, currently under development, provides some improvements to the hourly calculation method; despite many works can be found in literature on the hourly model of EN ISO 52016-1, the National Annexes application has not been sufficiently analysed yet. The aim of the present work is to assess the main improvements introduced by the Italian National Annex and to compare the main results, in terms of energy need for space heating and cooling. To this purpose, an existing building representative of the Italian office building stock in Northern Italy was selected as a case study. The energy simulations were carried out considering both continuous and reduced operation of the HVAC systems. The options specified in the Italian National Annex were firstly applied one by one, and then all together. The variation of the energy need compared to the international base procedure is finally quantified. For the premises and the scope above discussed, the present work is intended to enhance the standardisation activity towards the adoption of more accurate and trustable calculation methods of the building energy performance.

scholarly journals Controlled Mechanical Ventilation in Buildings: A Comparison between Energy Use and Primary Energy among Twenty Different Devices

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 2123 ◽  
Author(s):  
Lamberto Tronchin ◽  
Kristian Fabbri ◽  
Chiara Bertolli
Keyword(s):  
Mechanical Ventilation ◽  
Energy Consumption ◽  
Thermal Energy ◽  
High Performance ◽  
Energy Use ◽  
Operating Cost ◽  
Primary Energy ◽  
Energy Requirements ◽  
Controlled Mechanical Ventilation

Indoor air quality (IAQ) of buildings is a problem that affects both comfort for occupants and the energy consumption of the structure. Controlled mechanical ventilation systems (CMVs) make it possible to control the air exchange rate. When using CMV systems, it is interesting to investigate the relationship between the useful thermal energy requirements for ventilation and the energy consumption of these systems. This paper addresses whether there is a correlation between these two parameters. The methodology used in this work involves the application of equations of technical Italian regulations UNI/TS 11300 applied to a case study. The case study is represented by a 54 m3 room, which is assumed to have three CMV systems installed (extraction, insertion, insertion and extraction) for twenty different devices available on the market. Afterwards, simulations of useful thermal energy requirements QH,ve and primary energy EP,V were performed according to the electrical power of each fan W and the ventilation flow. The results show that the two values are not linearly correlated: it is not possible to clearly associate the operating cost for CMV systems according to building requirements. The study also shows that CMV systems are particularly efficient for high-performance buildings, where there is no leakage that can be ascribed to windows infiltrations.

Parametric Analysis of Building Elements on Building Energy Use

2015 ◽  
Vol 74 (4) ◽  
Author(s):  
Atefeh Mohammadpour ◽  
Mohammad Mottahedi ◽  
Shideh Shams Amiri ◽  
Somayeh Asadi ◽  
David Riley ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Energy Use ◽  
Full Range ◽  
Building Energy ◽  
Energy Performance ◽  
Simulation Software ◽  
Design Parameters ◽  
Building Energy Consumption ◽  
Commercial Building ◽  
Building Shape

Building energy modeling is essential to estimate energy consumption of buildings. Predicting building energy consumption benefits the owners, designers, and facility managers by enabling them to have an overview of building energy consumption and can help them to determine building energy performance during the design phase. This paper focuses on two different shapes of commercial building, H and rectangle to estimate energy consumption in buildings in three different climate zones, cold, hot-humid, and mixed-humid. To address this, DOE-2 building simulation software was used to build and simulate individual commercial building configurations that were generated using Monte Carlo simulation techniques. Ten thousand simulations for each building shape and climate zone were conducted to develop a comprehensive dataset covering the full range of design parameters. 

scholarly journals A Case Study of an Office Building to Identify Energy Consumption and Carbon Management Solutions Using Physical Data and Simulation Software

2021 ◽  
Vol 945 (1) ◽  
pp. 012049
Author(s):  
Ramesh Subramaniam ◽  
Vignes Ponniah ◽  
Shalini Sanmargaraja ◽  
Eric Lou ◽  
Muhammad Afiq Bin Nor Adli ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Carbon Emission ◽  
Greenhouse Gas Emission ◽  
Building Energy ◽  
Energy Performance ◽  
Simulation Software ◽  
Office Building ◽  
Total Consumption ◽  
Physical Data

Abstract To measure the level of energy performance of a building, there are several categories of energy consumption to be calculated such as oil, natural gas and electricity. In order to significantly minimise the Greenhouse gas emission in an office, it is important to tap into the positive progress of energy efficiency of equipment which contributes to total energy performance of a building. Consequently, to enable accurate building energy consumption of a building, energy modelling method is applied to identify total consumption and cost of energy usage with effects of carbon emission. Hence, this will help to reduce the costing of energy inside building with differences of efficiency options. Therefore, this paper aims to analyse an office building in terms of the level of energy consumption and carbon emission as a case study. The first objective is to identify the amount of energy consumption and carbon emission inside the building using the simulation software. Secondly, to identify the differences between the data recorded through simulation software and physical data. Finally, to identify solutions to decrease the carbon emission by applying measures towards reducing energy consumption inside the building.

Building Energy Simulation for LEED Qualification on a Commercial Building in China

2012 ◽  
Vol 193-194 ◽  
pp. 258-269 ◽  
Author(s):  
Ching Hin Law ◽  
Jian Kun Yang ◽  
Xiang Yang Jiang
Keyword(s):  
Energy Consumption ◽  
Energy Cost ◽  
Building Energy ◽  
Energy Performance ◽  
Energy Simulation ◽  
Building Energy Simulation ◽  
Commercial Building ◽  
Simulation Process

This research introduced and implemented building energy simulation via a case study of a commercial project in China, by considering the green features which can reduce the annual energy consumption of this building. This simulation process was based on the requirement described within LEED EA c1 Optimize Energy Performance. The result concluded that more than 39.41% of energy cost was reduced and thus the project can obtain 16 points from this credit.

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 Identification of Environmental and Contextual Driving Factors of Air Conditioning Usage Behaviour in the Sydney Residential Buildings

Buildings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 122
Author(s):  
Bongchan Jeong ◽  
Jungsoo Kim ◽  
Zhenjun Ma ◽  
Paul Cooper ◽  
Richard de Dear
Keyword(s):  
Energy Consumption ◽  
Air Conditioning ◽  
Energy Use ◽  
Residential Buildings ◽  
Significant Proportion ◽  
Building Energy ◽  
Energy Performance ◽  
Time Of Day ◽  
Performance Simulation ◽  
Building Energy Performance

Air conditioning (A/C) is generally responsible for a significant proportion of total building energy consumption. However, occupants’ air conditioning usage patterns are often unrealistically characterised in building energy performance simulation tools, which leads to a gap between simulated and actual energy use. The objective of this study was to develop a stochastic model for predicting occupant behaviour relating to A/C cooling and heating in residential buildings located in the Subtropical Sydney region of Australia. Multivariate logistic regression was used to estimate the probability of using A/C in living rooms and bedrooms, based on a range of physical environmental (outdoor and indoor) and contextual (season, day of week, and time of day) factors observed in 42 Sydney region houses across a two-year monitoring period. The resulting models can be implemented in building energy performance simulation (BEPS) tools to more accurately predict indoor environmental conditions and energy consumption attributable to A/C operation.

scholarly journals Building Design Strategies and Their Contribution to Energy Performance for LEED Certification

2006 ◽  
Vol 1 (4) ◽  
pp. 67-87 ◽  
Author(s):  
Audrey Kay Werthan ◽  
Mojtaba Navvab
Keyword(s):  
High Performance ◽  
Green Building ◽  
Building Design ◽  
Building Energy ◽  
Energy Performance ◽  
Design Strategies ◽  
Computer Simulation Study ◽  
Leed Certification ◽  
Difficult Challenge

Leadership in Energy and Environmental Design (LEED) is a national set of standards put forth by the U. S. Green Building Council in 1994 that was intended to inspire building designers to plan greener, more sustainable buildings. LEED offers up to ten points for improved energy optimization performance. It should be noted that achieving these ten points is time consuming, complex, and expensive. This research is a case study that details the process of using a computer simulation study as a building energy optimizing tool in order to achieve these optional points. Determination is made as to how many LEED points can be obtained when basic strategies such as window performance and day-lighting are integrated into one energy optimized building design. The results show that well-established energy conservation methods achieve as few as two or three LEED energy points, thereby possibly offering a disincentive for designers to attempt this difficult challenge. These fundamental efforts to achieve energy optimized building design are the first steps toward high performance building design and offer a fundamental solution to the substantial, negative environmental impacts caused by buildings today.

Sign in / Sign up

Export Citation Format

Share Document