Abstract
VTT has developed and installed indoor air measuring
systems to determine the efficiency of supply air
filtration of buildings in real operational conditions.
The systems have been installed in air handling units of
buildings in China and in Finland. The systems consist of
air sampling, a valve mechanism, particle counters and a
computer that controls the system and records the
measuring data. The measurement of temperature, relative
humidity and carbon dioxide of the air and pressure
difference of the supply air filter is also incorporated.
In one of the installations, the measuring data is sent
wirelessly to a server, where the data is analysed.
The measurement arrangements provide detailed information
on the removal efficiency of the filter as a function of
particle size. Particle concentration measurements of the
supply air and the return air provide ways to assess the
indoor/outdoor ratio of the indoor air impurities,
leakages in the building envelope as well as indoor
sources.
The results provided by the system showed that indoor air
particle concentration can be reduced significantly.
However, this calls for expertise and understanding of
the dynamics of the ventilation system. Installing more
efficient supply air filters resulted in extremely low
particle concentrations in the supply air.
In the future, particle concentration, CO2 and energy
consumption should be optimized simultaneously in a HVAC
control system. The measuring system may have a vital
role in monitoring and controlling the operation of more
intelligent and cost effective HVAC systems. This is
especially true, if the price of the major components of
the measuring system continue to decrease.
| Original language | English |
|---|---|
| Title of host publication | Ventilation 2015 |
| Subtitle of host publication | Proceedings of the 11th International Conference on Industrial Ventilation |
| Pages | 702-708 |
| Publication status | Published - 2015 |
| MoE publication type | A4 Article in a conference publication |
| Event | 11th International Conference on Industrial Ventilation, Ventilation 2015 - Shanghai, China Duration: 26 Oct 2015 → 28 Oct 2015 Conference number: 11 |
Conference
| Conference | 11th International Conference on Industrial Ventilation, Ventilation 2015 |
|---|---|
| Abbreviated title | Ventilation 2015 |
| Country/Territory | China |
| City | Shanghai |
| Period | 26/10/15 → 28/10/15 |
Keywords
- indoor air quality
- filtration efficiency
- I/O ratio
- on-line measurement