Performance simulations of hybrid ventilation systems in a five-story office building

Jarkko Heinonen, Mika Vuolle, Jorma Heikkinen, Olli Seppänen

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

1 Citation (Scopus)

Abstract

The performance of hybrid ventilation systems was studied to provide an alternative for the mechanical ventilation system with air-to-air heat recovery, which is common in Finnish office buildings. The hybrid ventilation concepts developed for the study are based on a low-pressure mechanical exhaust system and demand control of ventilation airflows. A preliminary calculation with a single-zone air leakage model was used to find out the appropriate ranges of building airtightness and pressure levels of the hybrid ventilation system. NMF-based coupled airflow network and thermal simulation software were used to simulate the airflow and energy performance of the building during a whole year. The results indicate that the ventilation rate can be controlled and energy costs reduced with the hybrid ventilation concepts. The savings in energy costs can be as high as 15% compared to demand-controlled mechanical ventilation with heat recovery. To achieve these savings, an advanced control of airflows and an adequate airtightness of building envelope are required.
Original languageEnglish
Title of host publicationASHRAE 2002 Annual Meeting
Pages1241-1250
Volume2
Publication statusPublished - 2002
MoE publication typeA4 Article in a conference publication

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Office buildings
Ventilation
Waste heat utilization
Air
Leakage (fluid)
Costs

Cite this

Heinonen, J., Vuolle, M., Heikkinen, J., & Seppänen, O. (2002). Performance simulations of hybrid ventilation systems in a five-story office building. In ASHRAE 2002 Annual Meeting (Vol. 2, pp. 1241-1250). ASHRAE Transactions, Vol.. 108
Heinonen, Jarkko ; Vuolle, Mika ; Heikkinen, Jorma ; Seppänen, Olli. / Performance simulations of hybrid ventilation systems in a five-story office building. ASHRAE 2002 Annual Meeting. Vol. 2 2002. pp. 1241-1250 (ASHRAE Transactions, Vol. 108).
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title = "Performance simulations of hybrid ventilation systems in a five-story office building",
abstract = "The performance of hybrid ventilation systems was studied to provide an alternative for the mechanical ventilation system with air-to-air heat recovery, which is common in Finnish office buildings. The hybrid ventilation concepts developed for the study are based on a low-pressure mechanical exhaust system and demand control of ventilation airflows. A preliminary calculation with a single-zone air leakage model was used to find out the appropriate ranges of building airtightness and pressure levels of the hybrid ventilation system. NMF-based coupled airflow network and thermal simulation software were used to simulate the airflow and energy performance of the building during a whole year. The results indicate that the ventilation rate can be controlled and energy costs reduced with the hybrid ventilation concepts. The savings in energy costs can be as high as 15{\%} compared to demand-controlled mechanical ventilation with heat recovery. To achieve these savings, an advanced control of airflows and an adequate airtightness of building envelope are required.",
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Heinonen, J, Vuolle, M, Heikkinen, J & Seppänen, O 2002, Performance simulations of hybrid ventilation systems in a five-story office building. in ASHRAE 2002 Annual Meeting. vol. 2, ASHRAE Transactions, vol. 108, pp. 1241-1250.

Performance simulations of hybrid ventilation systems in a five-story office building. / Heinonen, Jarkko; Vuolle, Mika; Heikkinen, Jorma; Seppänen, Olli.

ASHRAE 2002 Annual Meeting. Vol. 2 2002. p. 1241-1250 (ASHRAE Transactions, Vol. 108).

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

TY - GEN

T1 - Performance simulations of hybrid ventilation systems in a five-story office building

AU - Heinonen, Jarkko

AU - Vuolle, Mika

AU - Heikkinen, Jorma

AU - Seppänen, Olli

PY - 2002

Y1 - 2002

N2 - The performance of hybrid ventilation systems was studied to provide an alternative for the mechanical ventilation system with air-to-air heat recovery, which is common in Finnish office buildings. The hybrid ventilation concepts developed for the study are based on a low-pressure mechanical exhaust system and demand control of ventilation airflows. A preliminary calculation with a single-zone air leakage model was used to find out the appropriate ranges of building airtightness and pressure levels of the hybrid ventilation system. NMF-based coupled airflow network and thermal simulation software were used to simulate the airflow and energy performance of the building during a whole year. The results indicate that the ventilation rate can be controlled and energy costs reduced with the hybrid ventilation concepts. The savings in energy costs can be as high as 15% compared to demand-controlled mechanical ventilation with heat recovery. To achieve these savings, an advanced control of airflows and an adequate airtightness of building envelope are required.

AB - The performance of hybrid ventilation systems was studied to provide an alternative for the mechanical ventilation system with air-to-air heat recovery, which is common in Finnish office buildings. The hybrid ventilation concepts developed for the study are based on a low-pressure mechanical exhaust system and demand control of ventilation airflows. A preliminary calculation with a single-zone air leakage model was used to find out the appropriate ranges of building airtightness and pressure levels of the hybrid ventilation system. NMF-based coupled airflow network and thermal simulation software were used to simulate the airflow and energy performance of the building during a whole year. The results indicate that the ventilation rate can be controlled and energy costs reduced with the hybrid ventilation concepts. The savings in energy costs can be as high as 15% compared to demand-controlled mechanical ventilation with heat recovery. To achieve these savings, an advanced control of airflows and an adequate airtightness of building envelope are required.

M3 - Conference article in proceedings

VL - 2

SP - 1241

EP - 1250

BT - ASHRAE 2002 Annual Meeting

ER -

Heinonen J, Vuolle M, Heikkinen J, Seppänen O. Performance simulations of hybrid ventilation systems in a five-story office building. In ASHRAE 2002 Annual Meeting. Vol. 2. 2002. p. 1241-1250. (ASHRAE Transactions, Vol. 108).