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Static and dynamic thermal properties of construction components: A comparison in idealized and experimental conditions using lumped parameter models

Static and dynamic thermal properties of construction components: A comparison in idealized and experimental conditions using lumped parameter models
Static and dynamic thermal properties of construction components: A comparison in idealized and experimental conditions using lumped parameter models

The U values assumptions for construction components represent a significant source of uncertainty when estimating the energy performance of buildings. This uncertainty affects decision-making processes in multiple ways, from policy making to design of new and refurbished buildings. The correct estimation of both static (e.g. thermal transmittance) and dynamic thermal properties is crucial for quality assurance in building performance assessment. Further, while today many sophisticated simulators are available for building performance modelling, lumped parameter models can help reducing computational time for parametric simulation or optimization and enable inverse estimation of lumped thermal characteristics. A lumped parameter approach for construction components is proposed, for example, by the ISO 52016-1:2017 norm, introducing simplifications that are intrinsically dependent on component's stratigraphy. This approach complements ISO 13786:2017 norm method, which is limited to steady-state periodic temperature and heat flux boundary conditions. In this research we consider these two different approaches, detailed and lumped modelling, comparing them first in idealized conditions and then in experimental conditions to analyse the robustness of methods.

1757-899X
Tronchin, Lamberto
8527a327-51fb-4865-b99d-eab721dadec9
Manfren, Massimiliano
f2b8c02d-cb78-411d-aed1-c4d056365392
Vodola, Vincenzo
2331a583-1fee-47f3-8d5a-529da9c73e84
Bisegna, Fabio
c7e4f398-1d69-4ad7-a43e-e930fef382db
Nardecchia, Fabio
a3bbd54a-f53b-429b-a9a9-d0d3c1f2af78
Tronchin, Lamberto
8527a327-51fb-4865-b99d-eab721dadec9
Manfren, Massimiliano
f2b8c02d-cb78-411d-aed1-c4d056365392
Vodola, Vincenzo
2331a583-1fee-47f3-8d5a-529da9c73e84
Bisegna, Fabio
c7e4f398-1d69-4ad7-a43e-e930fef382db
Nardecchia, Fabio
a3bbd54a-f53b-429b-a9a9-d0d3c1f2af78

Tronchin, Lamberto, Manfren, Massimiliano, Vodola, Vincenzo, Bisegna, Fabio and Nardecchia, Fabio (2019) Static and dynamic thermal properties of construction components: A comparison in idealized and experimental conditions using lumped parameter models. IOP Conference Series: Materials Science and Engineering, 609. (doi:10.1088/1757-899X/609/7/072042).

Record type: Article

Abstract

The U values assumptions for construction components represent a significant source of uncertainty when estimating the energy performance of buildings. This uncertainty affects decision-making processes in multiple ways, from policy making to design of new and refurbished buildings. The correct estimation of both static (e.g. thermal transmittance) and dynamic thermal properties is crucial for quality assurance in building performance assessment. Further, while today many sophisticated simulators are available for building performance modelling, lumped parameter models can help reducing computational time for parametric simulation or optimization and enable inverse estimation of lumped thermal characteristics. A lumped parameter approach for construction components is proposed, for example, by the ISO 52016-1:2017 norm, introducing simplifications that are intrinsically dependent on component's stratigraphy. This approach complements ISO 13786:2017 norm method, which is limited to steady-state periodic temperature and heat flux boundary conditions. In this research we consider these two different approaches, detailed and lumped modelling, comparing them first in idealized conditions and then in experimental conditions to analyse the robustness of methods.

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Published date: 23 October 2019
Venue - Dates: 10th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings, IAQVEC 2019, Italy, 2019-09-04 - 2019-09-06

Identifiers

Local EPrints ID: 435981
URI: http://eprints.soton.ac.uk/id/eprint/435981
ISSN: 1757-899X
PURE UUID: 0d12d547-2b84-48d1-abd9-8206dfffd5d7
ORCID for Massimiliano Manfren: ORCID iD orcid.org/0000-0003-1438-970X

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Date deposited: 26 Nov 2019 17:30
Last modified: 20 Jan 2020 17:37

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Contributors

Author: Lamberto Tronchin
Author: Vincenzo Vodola
Author: Fabio Bisegna
Author: Fabio Nardecchia

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