Comparison of EnergyPlus and IES to model a complex university building using three scenarios: Free-floating, ideal air load system, and detailed

Al-janabi, Ali; Kavgic, Miroslava; Mohammadzadeh, Ali; Azzouz, Afaf

doi:10.1016/j.jobe.2018.12.022

Cited by 73 publications

(17 citation statements)

References 33 publications

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“…34 Mousavi and Khana 22 demonstrated IES as a valid tool for daylight analysis with RADIANCE-IES and although discrepancy between dynamic building simulation model output and that of real building energy consumption is widely acknowledged. Literature 35,36 have shown that dynamic simulation tools (including IES) demonstrate good internal consistency for modelling temperature response to environmental conditions. This makes it a valid tool and approach for the comparative analysis presented in this paper.…”

Section: Methodsmentioning

confidence: 99%

Modelling the overheating risk in an uniform high-rise building design with a consideration of urban context and heatwaves

Habitzreuter

Smith

Keeling

2019

Indoor and Built Environment

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Overheating in buildings is one of the increasing concerns related to climate change and can lead to an increase in heat-related health issues and higher energy consumption due to the use of air conditioning systems. Literature shows that internal conditions and demand on environmental control systems can vary with height within buildings. However, an architectural trend towards highly glazed façades for tall buildings suggests the vertical gradient of performance is not always considered in the design process. By simulating a high-rise residential building in London, a comparative analysis of the overheating risks and daylighting at different levels in the building was conducted. In this study the model was able to consider the influence of surrounding built environment on solar gain and so influence of urban location on overheating risk was taken into account. Simulations were conducted using typical reference years as well as meteorological data for specific heat-wave periods experienced in London and that are expected to become more intense and frequent due to climate change. Passive mitigation options (external shading) are demonstrated to help reduce overheating occurrence by 74%, at the same time the impact of decreased daylighting (30%) is less problematic at higher levels where daylight factor is greater.

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Section: Methodsmentioning

confidence: 99%

Modelling the overheating risk in an uniform high-rise building design with a consideration of urban context and heatwaves

Habitzreuter

Smith

Keeling

2019

Indoor and Built Environment

View full text Add to dashboard Cite

show abstract

“…Similarly, energy usage and optimization have been energy use in buildings while enhancing occupant comfort and productivity [36]. Although certain software tools such as EnergyPlus™ (Produced by U.S. Department of Energy, 1000 Independence Ave. SW, Washington DC 20585, USA) have been used recently to include different behavioral modules including aspects of occupant behavior, the tool is mainly designed to be used with standard schedules and the essence of behavioral schedules may not be captured in its entirety by it [37,38]. Further, the collaboration accuracy of modified models is another aspect to look into when using tools designed for working with general schedules to include behavioral schedules [39].…”

Section: Introductionmentioning

confidence: 99%

The Performance Gap in Energy-Efficient Office Buildings: How the Occupants Can Help?

et al. 2020

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Rising demand and limited production of electricity are instrumental in spreading the awareness of cautious energy use, leading to the global demand for energy-efficient buildings. This compels the construction industry to smartly design and effectively construct these buildings to ensure energy performance as per design expectations. However, the research tells a different tale: energy-efficient buildings have performance issues. Among several reasons behind the energy performance gap, occupant behavior is critical. The occupant behavior is dynamic and changes over time under formal and informal influences, but the traditional energy simulation programs assume it as static throughout the occupancy. Effective behavioral interventions can lead to optimized energy use. To find out the energy-saving potential based on simulated modified behavior, this study gathers primary building and occupant data from three energy-efficient office buildings in major cities of Pakistan and categorizes the occupants into high, medium, and low energy consumers. Additionally, agent-based modeling simulates the change in occupant behavior under the direct and indirect interventions over a three-year period. Finally, energy savings are quantified to highlight a 25.4% potential over the simulation period. This is a unique attempt at quantifying the potential impact on energy usage due to behavior modification which will help facility managers to plan and execute necessary interventions and software experts to develop effective tools to model the dynamic usage behavior. This will also help policymakers in devising subtle but effective behavior training strategies to reduce energy usage. Such behavioral retrofitting comes at a much lower cost than the physical or technological retrofit options to achieve the same purpose and this study establishes the foundation for it.

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“…The IdealLoadAirSystem is an object defined to supply heating and cooling to a zone to meet any heating or cooling demand of the zone at all times with 100% efficiency. The IdealLoadAirSystem is widely used to investigate geometry in the early stages of the building design, to study and test complex building materials, and to optimize building envelope performance [46,47]. In this study, the IdealLoadAirSystem was applied to evaluate the building envelope performance.…”

Section: Results Of Simulations Of the Reference Buildingsmentioning

confidence: 99%

An Analysis of the Effectiveness of Greenhouse Gas Reduction Policy for Office Building Design in South Korea

et al. 2019

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This paper examines the effectiveness of South Korea’s policy for reducing greenhouse gas (GHG) emissions in office buildings and evaluates if national targets can be met. A sample of office buildings was categorized into two groups—conventional (Group A) and new (Group B)—based on when their construction was approved. Furthermore, data regarding the three design elements of the building envelope, that is building form, window systems, and U-values were collected. By statistically processing data of each element, reference building models were developed and a case study was conducted for each building. Design changes that were incorporated, keeping in mind the GHG reduction policy, showed 13.1% of saving energy in case 8 (reference building of Group B) than case 1 (reference building of Group A). The savings in case 8 were more than the average GHG reduction rate (12.8%) compared to business as usual (BAU). However, case 4 (a conventional (Group A) building form with new (Group B) window systems and U-values) achieved the greatest savings in building loads. The policy to enhance insulation in new buildings to reduce GHG emissions in the building sector has prompted changes in building forms and window systems and has reduced emissions by 10%, that is 3% more than the expected value. Thus, new innovations in building envelope design could achieve an average 12.8% reduction in emissions in buildings.

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Comparison of EnergyPlus and IES to model a complex university building using three scenarios: Free-floating, ideal air load system, and detailed

Cited by 73 publications

References 33 publications

Modelling the overheating risk in an uniform high-rise building design with a consideration of urban context and heatwaves

Modelling the overheating risk in an uniform high-rise building design with a consideration of urban context and heatwaves

The Performance Gap in Energy-Efficient Office Buildings: How the Occupants Can Help?

An Analysis of the Effectiveness of Greenhouse Gas Reduction Policy for Office Building Design in South Korea

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