Applicability and evaluation of airtightness prediction method using pressure differences under actual climate conditions

Park, Seunghwan; Park, Sowoo; Song, Doosam

doi:10.1016/j.jobe.2023.107628

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2024

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Cited by 2 publications

References 8 publications

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Partial Validation of Water Vapor as a Tracer Gas for Determining Air Change Rates

Hakkarainen,

Oskierko-Jeznacki,

Braham

2024

Preprint

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Partial Validation of Water Vapor as a Tracer Gas for Determining Air Change Rates

Hakkarainen,

Oskierko-Jeznacki,

Braham

2024

Preprint

View full text Add to dashboard Cite

Development of Operating Strategies for Return Fan in HVAC System Considering Differential Pressure

Lee,

Kim,

Lee

et al. 2024

Energies

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The pressure difference in buildings causes indoor and outdoor airflow, significantly impacting the indoor thermal environment and building energy consumption due to the introduction of outdoor air. The pressure difference in buildings is highly variable, influenced by outdoor wind speed, indoor–outdoor temperature differences, and heating, ventilating and air conditioning (HVAC) system operation, making it difficult to consider this factor during general HVAC system operation, potentially leading to an imbalance in indoor and outdoor pressure differences. Therefore, this study proposes an appropriate operation strategy for HVAC system return fans considering indoor–outdoor pressure differences. The proposed strategy involves adjusting the return fan airflow to maintain a constant indoor airflow balance, thereby controlling the indoor–outdoor pressure difference, satisfying the indoor thermal environment, and reducing HVAC system energy consumption. To evaluate the proposed strategy, dynamic simulations using TRNSYS and TRNFLOW were utilized, targeting one floor of an office building equipped with a variable air volume (VAV) system. The evaluation results showed that the maximum pressure difference decreased from −142 Pa to −18 Pa compared to the existing strategy, and the total energy consumption of the HVAC system was reduced by 29%, highlighting the importance of considering pressure differences during HVAC system operation.

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Applicability and evaluation of airtightness prediction method using pressure differences under actual climate conditions

Cited by 2 publications

References 8 publications

Partial Validation of Water Vapor as a Tracer Gas for Determining Air Change Rates

Partial Validation of Water Vapor as a Tracer Gas for Determining Air Change Rates

Development of Operating Strategies for Return Fan in HVAC System Considering Differential Pressure

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