A1.1 - Development of an Optical Real-Time Measurement System for Air Change Rates in Indoor Environments

Event
SMSI 2025
2025-05-06 - 2025-05-08
Nürnberg
Band
Lectures
Chapter
A1 - Atmospheric Measurement
Author(s)
R. Grüttner, C. Friebe - Institut für Luft- und Kältetechnik gemeinnützige Gesellschaft mbH, Dresden (Germany)
Pages
24 - 25
DOI
10.5162/SMSI2025/A1.1
ISBN
978-3-910600-06-5
Price
free

Abstract

This article presents a novel measurement system and method for determining air change rates in real-time using an optical principle. It measures the attenuation of light intensity through fog aerosols in an indoor volume, employing a light source (laser) and a detector to capture transmitted intensity, allowing measurements across distances of 1 to 50 m. Results were validated against conventional methods, such as the SF6 tracer gas decay method and volumetric air change measurement. Disturbances like temperature variations and external light were successfully mitigated.

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