IPERION HSIntegrating Platforms for the European Research Infrastructure ON Heritage Science
Technique: Air Exchange Rate and Ventilation (AER)

Air Exchange Rate and Ventilation (AER) system

1. CO2 Logger is a Wireless (bluetooth) and battery opperated CO2 logger, with an auto calibration option, ideal for use within enclosures, 2. Ultrasonic anemometer is a tool to measure air velocity in three dimensions using air pressure differences measured with the doppler effect. It has a high accuracy and measures velocities down to 0.01 m/s; 3. Hot Wire Anemometer is a tool to measure air velocity based on the convective cooling of an electrical resistence. It measures velocities above 0.03 m/s; 4. Thermal Imaging is composed of FLIR Infra Red thermal cameras.

Potential Results

1. The installation of multiple loggers inside and outside enclosures allows a comparison of CO2 decay rates. The ventilation rate can be estimated using the measurements of CO2 decay. The bluetooth connectivity allows the data to be retreived using a mobile device without opening the studied enclosure, which allows greater flexibility to the experimental design. The "Auto Calibration" feature refers to a quick zeroing of the instrument; 2. Ultrasonic anemometer is a tool useful to measure air velocities caused by small temperature or pressure gradients, such as the stack effect in bookshelves, behind paintings or inside display cases. It is bulky (20 by 15 by 15 cm) and its presence can disrupt de flow in narrow spaces. It captures the data in a high frequency (1 Hz) and its interpretation requires specialised computational tools; 3. Hot wire Anemometer is sufficiently accurate to measure air movement in most indoor scenarios and to identify areas of stagnation (less than 0.1 m/s). It is a hand held tool, battery opperated, and it is ideally suited for applications thant involve testing of multiple locations or mapping of air flow; 4. Thermal imagins is a range of cameras of different resolution and accuracy which capture the distribution of temperature of a surface. Thermal imaging has a range of applications, including the identification of areas of evaporative cooling indoors, leakage of hot or cold air and the location of thermal bridges. Quantitatively, it can offer high accuracy in the measurement of temperature, but the quality of the measurements depend on how well known and controlled are the experimental parameters, such as the IR emissivity of the surface.