Monitoring
Tough tests in the field
Measure, study and analyse in order to better understand the natural behaviour of ventilation and to optimise the way our systems are designed: experiment is a key word at Aereco and always will be. By comparing theory and practice, field experiments and studies conducted by Aereco in many countries have increased our knowledge and confirmed the performance of our systems. As follows:
Performance project - Large scale monitoring of demand controlled MEV in occupied housing, France
Applied on two new buildings erected in 2007 located in Paris and near Lyon (France), Performance project has given the opportunity to measure precisely, in a large set of dwellings, the efficiency of the French standard ventilation system (humidity controlled Mechanical Exhaust Ventilation) in general, of the Aereco DCV system in particular. After an assessment of the performance of the installation (envelop, ductwork and airflows), a total of 30 occupied dwellings has been monitored during two years since November 2007 to measure representative parameters for energy consumption and indoor air quality.
The monitoring has enabled to better understand the parameters which can influence the ventilation performance. The results have demonstrated the efficiency of the humidity controlled ventilation in managing the indoor air quality by measuring CO2 and humidity concentrations. Energy savings on the equivalent airflow for energy have been evaluated at 30% on the over-occupied monitored dwellings but the extrapolation to the average occupancy of the French building stock have shown to be around 55% energy savings, which is consistent with the theoretical calculation of the CSTB technical approvals.
Nangis - HR-VENT, France
For 2 years, pressure, airflow, temperature and humidity level values have been recorded in 55 dwellings equipped with humidity sensitive assisted passive stack ventilation systems. It is one of the most extensive field studies, and it has proved very informative on natural and assisted ventilation.
Humidity controlled MEV in a Tokyo appartment, Japan
Started in February 2008 in a 30 years old building in the centre of Tokyo, this experiment has consisted in measuring and recording several ventilation parameters during a couple of weeks in a monitored dwelling, to evaluate the performances of a humidity controlled mechanical ventilation system. Managed by the NILIM (National Institute for Land and Infrastructure Management), this project is the result of a cooperation with French Aereco Company. The dwelling, belonging to Tokyo Gas company, was composed of two bedrooms and three technical rooms for a total surface of 40 m2 (height 2.50 m). The human occupancy was physically simulated by the mean of four water and heat emitters located in the kitchen, bathroom, and bedrooms, while the ventilation performances were measured through specific instrumentation located in each ventilation device (air inlets and air extract units).
Passive stack ventilation in individual house - Hokkaido, Japan
From October 2000 to September 2001, we have measured several parameters on 2 humidity sensitive PSV extracts grilles in a house in Hokkaido, Japan.