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A conceptual model that simulates the influence of thermal inertia in building structures

Karlsson, Jonathan LU ; Wadsö, Lars LU and Öberg, Mats LU (2013) In Energy and Buildings 60. p.146-151
Abstract
The energy use for maintaining comfortable indoor temperatures are to a certain extent dependent on the thermal storage capacity of materials in contact with the indoor air. This article describes a conceptual model for investigating the effects of increasing the thermal storage capacity of building materials. A building is modeled as an exterior wall, an indoor air volume and a thermally heavy inner wall. The input of thermal energy (heating, solar) is also included, as is a varying external temperature. The result is shown in three-dimensional graphs with different output variables of interest as functions of volumetric heat capacity and thermal conductivity of the material in the heavy construction part (with a standard concrete as a... (More)
The energy use for maintaining comfortable indoor temperatures are to a certain extent dependent on the thermal storage capacity of materials in contact with the indoor air. This article describes a conceptual model for investigating the effects of increasing the thermal storage capacity of building materials. A building is modeled as an exterior wall, an indoor air volume and a thermally heavy inner wall. The input of thermal energy (heating, solar) is also included, as is a varying external temperature. The result is shown in three-dimensional graphs with different output variables of interest as functions of volumetric heat capacity and thermal conductivity of the material in the heavy construction part (with a standard concrete as a reference). Output variables of interest are for example energy consumption, peak power consumption and thermal comfort parameters. Influence of factors such as the thickness of the interior wall, wall surface area, and the influence of free solar radiation can be tested. The aim is to present a minimal and thus fully comprehensible model that can be used as a qualitative tool to investigate the influence of thermal mass on building performance. The model was tested for a cold-climate case and the results show that passive energy storage through high thermal mass can significantly change the power consumption pattern, which can give significant benefits, while the total energy consumption in most cases is not much influenced. (C) 2013 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Thermal mass, Concrete, Simulation, Energy consumption, Thermal power, need, Thermal comfort, Time constant, Qualitative analysis, Cold spell, Free solar heat
in
Energy and Buildings
volume
60
pages
146 - 151
publisher
Elsevier
external identifiers
  • wos:000317539800015
  • scopus:84873933912
ISSN
1872-6178
DOI
10.1016/j.enbuild.2013.01.017
language
English
LU publication?
yes
id
abf8525b-f05e-404c-8263-589f7acc6ef3 (old id 3853627)
date added to LUP
2013-06-20 08:47:53
date last changed
2019-01-20 03:00:22
@article{abf8525b-f05e-404c-8263-589f7acc6ef3,
  abstract     = {The energy use for maintaining comfortable indoor temperatures are to a certain extent dependent on the thermal storage capacity of materials in contact with the indoor air. This article describes a conceptual model for investigating the effects of increasing the thermal storage capacity of building materials. A building is modeled as an exterior wall, an indoor air volume and a thermally heavy inner wall. The input of thermal energy (heating, solar) is also included, as is a varying external temperature. The result is shown in three-dimensional graphs with different output variables of interest as functions of volumetric heat capacity and thermal conductivity of the material in the heavy construction part (with a standard concrete as a reference). Output variables of interest are for example energy consumption, peak power consumption and thermal comfort parameters. Influence of factors such as the thickness of the interior wall, wall surface area, and the influence of free solar radiation can be tested. The aim is to present a minimal and thus fully comprehensible model that can be used as a qualitative tool to investigate the influence of thermal mass on building performance. The model was tested for a cold-climate case and the results show that passive energy storage through high thermal mass can significantly change the power consumption pattern, which can give significant benefits, while the total energy consumption in most cases is not much influenced. (C) 2013 Elsevier B.V. All rights reserved.},
  author       = {Karlsson, Jonathan and Wadsö, Lars and Öberg, Mats},
  issn         = {1872-6178},
  keyword      = {Thermal mass,Concrete,Simulation,Energy consumption,Thermal power,need,Thermal comfort,Time constant,Qualitative analysis,Cold spell,Free solar heat},
  language     = {eng},
  pages        = {146--151},
  publisher    = {Elsevier},
  series       = {Energy and Buildings},
  title        = {A conceptual model that simulates the influence of thermal inertia in building structures},
  url          = {http://dx.doi.org/10.1016/j.enbuild.2013.01.017},
  volume       = {60},
  year         = {2013},
}