Validation of coupled airflow and heat transfer routines in a building simulation tool

Pekka Tuomaala, Carey Simonson, Kalevi Piira

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

3 Citations (Scopus)

Abstract

Several organizations and expert groups have released different test cases for the validation of building simulation tools. This study is a summary of validation results obtained by a new whole building simulation tool developed at a Finnish national research organization. Currently, this new simulation tool is focused on heat transfer and airflow in buildings and their effect on indoor air quality and thermal comfort. In the future, the new simulation tool can be expanded to analyze the energy consumption of buildings because the model solves the coupled mass, momentum, and energy balance equations. Ventilation fans, wind, and thermal buoyancy are included as driving forces for the air infiltration and ventilation processes. Multimode heat transfer- including convection, conduction, and radiation -is modeled to ensure the reliability of thermal simulation results. When validating the routines in a numerical model, it is important to apply both simple and complex tests. It is proposed that a series of analytical, intermodel, and empirical tests are needed to verify different aspects of a numerical model. As a result, several validation tests from the literature are applied to demonstrate the validity of the airflow and heat transfer routines in the simulation tool. In addition, coupled airflow and heat transfer in a fireplace is measured and simulated to validate the coupled airflow and heat transfer routines.
Original languageEnglish
Title of host publicationASHRAE 2002 Winter Meeting
Pages435-449
Volume1
Publication statusPublished - 2002
MoE publication typeA4 Article in a conference publication

Publication series

SeriesASHRAE Transactions
Volume108
ISSN0001-2505

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Heat transfer
Ventilation
Numerical models
Heat convection
Thermal comfort
Energy balance
Buoyancy
Infiltration
Air quality
Fans
Momentum
Energy utilization
Radiation
Air
Hot Temperature

Cite this

Tuomaala, P., Simonson, C., & Piira, K. (2002). Validation of coupled airflow and heat transfer routines in a building simulation tool. In ASHRAE 2002 Winter Meeting (Vol. 1, pp. 435-449). ASHRAE Transactions, Vol.. 108
Tuomaala, Pekka ; Simonson, Carey ; Piira, Kalevi. / Validation of coupled airflow and heat transfer routines in a building simulation tool. ASHRAE 2002 Winter Meeting. Vol. 1 2002. pp. 435-449 (ASHRAE Transactions, Vol. 108).
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Tuomaala, P, Simonson, C & Piira, K 2002, Validation of coupled airflow and heat transfer routines in a building simulation tool. in ASHRAE 2002 Winter Meeting. vol. 1, ASHRAE Transactions, vol. 108, pp. 435-449.

Validation of coupled airflow and heat transfer routines in a building simulation tool. / Tuomaala, Pekka; Simonson, Carey; Piira, Kalevi.

ASHRAE 2002 Winter Meeting. Vol. 1 2002. p. 435-449 (ASHRAE Transactions, Vol. 108).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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AB - Several organizations and expert groups have released different test cases for the validation of building simulation tools. This study is a summary of validation results obtained by a new whole building simulation tool developed at a Finnish national research organization. Currently, this new simulation tool is focused on heat transfer and airflow in buildings and their effect on indoor air quality and thermal comfort. In the future, the new simulation tool can be expanded to analyze the energy consumption of buildings because the model solves the coupled mass, momentum, and energy balance equations. Ventilation fans, wind, and thermal buoyancy are included as driving forces for the air infiltration and ventilation processes. Multimode heat transfer- including convection, conduction, and radiation -is modeled to ensure the reliability of thermal simulation results. When validating the routines in a numerical model, it is important to apply both simple and complex tests. It is proposed that a series of analytical, intermodel, and empirical tests are needed to verify different aspects of a numerical model. As a result, several validation tests from the literature are applied to demonstrate the validity of the airflow and heat transfer routines in the simulation tool. In addition, coupled airflow and heat transfer in a fireplace is measured and simulated to validate the coupled airflow and heat transfer routines.

M3 - Conference article in proceedings

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Tuomaala P, Simonson C, Piira K. Validation of coupled airflow and heat transfer routines in a building simulation tool. In ASHRAE 2002 Winter Meeting. Vol. 1. 2002. p. 435-449. (ASHRAE Transactions, Vol. 108).