Method identifying oversizing of mechanical ventilation systems in office buildings using airflow and electrical power measurements

D.S. Khan*, J. Kolarik, C.A. Hviid, P. Weitzmann

*Corresponding author for this work

    Research output: Contribution to journalConference articleResearchpeer-review

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    Abstract

    Heating, Ventilation and Air-Conditioning engineers face high demands from their clients to deliver reliable, optimized solutions that perform acceptably in terms of energy use and provided comfort. However, time and resources are scarce to deliver an optimized solution. To ensure that the solution works under most operation scenarios, the design is typically based on a combination of conservative rules-of-thumb, general guidelines and a large safety factor. The consequences are building service systems designed for operating conditions that never or very rarely occur leading to oversized systems. The objective of this paper was to propose a method for identifying oversized air-handling units with variable speed drives. It was demonstrated on a case study including six airhandling units in an office building. The method was able to determine that the air-handling units were not grossly oversized or undersized by comparing the measured airflow and SFP from the part- and full-load operation to the design airflow and SFP. However, the method should be extended to include additional performance criterion such as indoor climate and thermal efficiency to be able to conclusively confirm the size of the units.
    Original languageEnglish
    Article number052021
    JournalI O P Conference Series: Materials Science and Engineering
    Volume609
    Issue number3
    Number of pages6
    ISSN1757-8981
    DOIs
    Publication statusPublished - 2019
    Event10th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings - Bari, Italy
    Duration: 5 Sep 20197 Sep 2019
    Conference number: 10

    Conference

    Conference10th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings
    Number10
    Country/TerritoryItaly
    CityBari
    Period05/09/201907/09/2019

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