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Steady-State Calculation vs. Dynamic Energy Simulations during the Early Design Phase

Pepe, Emanuele LU and Dubois, Marie-Claude LU (2023) 19th Advanced Building Skins Conference & Expo
28-29 October 2024, Bern, Switzerland
 p.73-85
Abstract
This article uses the steady-state calculation, based on the heating degree-day method, to verify dynamic
energy simulations and estimate a building's heating energy use in early design phases. Utilizing Climate
Studio through Rhinoceros/Grasshopper, this method acts as a control, ensuring reliability of the dynamic
model's input/output. The simulations were conducted on a single building block with increasing density.
Heating demand considerations included conduction, air leakage, and ventilation. Employing Copenhagen,
Denmark (55.7° N, 12.6° E) climate file, the heating demands was assessed both with and without solar
radiation. The results show a near alignment between the steady-state and dynamic results with... (More)
This article uses the steady-state calculation, based on the heating degree-day method, to verify dynamic
energy simulations and estimate a building's heating energy use in early design phases. Utilizing Climate
Studio through Rhinoceros/Grasshopper, this method acts as a control, ensuring reliability of the dynamic
model's input/output. The simulations were conducted on a single building block with increasing density.
Heating demand considerations included conduction, air leakage, and ventilation. Employing Copenhagen,
Denmark (55.7° N, 12.6° E) climate file, the heating demands was assessed both with and without solar
radiation. The results show a near alignment between the steady-state and dynamic results with differences
ranging from 2.2% to 5.4% when solar radiation is omitted and a control constant outdoor temperature of 0°C
is applied. However, a discrepancy exceeding 36% is observed when including solar radiation and an average
outdoor temperature of 10°C, attributable to solar radiation combined with the building's thermal mass lag
absent in steady-state calculations. While the steady-state approach has limitations, it offers a simplified yet
reliable method to estimate energy use in early stages (Less)
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author
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organization
publishing date
type
Contribution to conference
publication status
published
subject
pages
23 pages
conference name
19th Advanced Building Skins Conference & Expo<br/>28-29 October 2024, Bern, Switzerland<br/>
conference location
Bern, Switzerland
conference dates
2023-10-30 - 2023-10-31
language
English
LU publication?
yes
id
7763ae32-81d9-4a19-8feb-8f99b6bab49a
date added to LUP
2024-03-06 14:53:20
date last changed
2024-03-15 10:45:03
@misc{7763ae32-81d9-4a19-8feb-8f99b6bab49a,
  abstract     = {{This article uses the steady-state calculation, based on the heating degree-day method, to verify dynamic<br/>energy simulations and estimate a building's heating energy use in early design phases. Utilizing Climate<br/>Studio through Rhinoceros/Grasshopper, this method acts as a control, ensuring reliability of the dynamic<br/>model's input/output. The simulations were conducted on a single building block with increasing density.<br/>Heating demand considerations included conduction, air leakage, and ventilation. Employing  Copenhagen,<br/>Denmark (55.7° N, 12.6° E) climate file, the heating demands was assessed both with and without solar<br/>radiation. The results show a near alignment between the steady-state and dynamic results with differences<br/>ranging from 2.2% to 5.4% when solar radiation is omitted and a control constant outdoor temperature of 0°C<br/>is applied. However, a discrepancy exceeding 36% is observed when including solar radiation and an average<br/>outdoor temperature of 10°C, attributable to solar radiation combined with the building's thermal mass lag<br/>absent in steady-state calculations. While the steady-state approach has limitations, it offers a simplified yet<br/>reliable method to estimate energy use in early stages}},
  author       = {{Pepe, Emanuele and Dubois, Marie-Claude}},
  language     = {{eng}},
  month        = {{10}},
  pages        = {{73--85}},
  title        = {{Steady-State Calculation vs. Dynamic Energy Simulations during the Early Design Phase}},
  year         = {{2023}},
}