Cabin Ventilation Measurement
Although one might consider them as secondary requirements, passenger comfort issues – such as indoor air quality or thermal comfort – are actually important design constraints for automotive makers, but also for aircraft manufacturers, who care about the full experience of their vehicles’ passengers.
Within a vehicle’s cabin - as inside a building – indoor air quality and thermal comfort are very dependent from the performance of the HVAC system. Therefore, R&D teams working on the development of new cabin designs in the automotive or aircraft industry will highly rely on advanced airflow modeling when analyzing the air conditioning and ventilation systems.
Still even the most advanced modeling tools require some validation. The same R&D teams will therefore benefit from accurate measurement techniques in order to:
- Benchmark and validate their modeling tools,
- Further analyze the performance of the cabin ventilation system, in conditions which are not easily modeled.
Unique Measuring Technique
Tracer gas measurement methods are amongst the most performant flowrate measurement techniques available in complex geometries and over a wide range of air velocity profiles. They are typically based upon the measurement of the dilution ratio of a specific tracer gas (whose injection rate is controlled) in an airflow stream.
Based upon the photoacoustic IR spectroscopy monitor, INNOVA 1412i, our tracer gas system is a unique product on the market which features: a multi-channel sampler, a highly accurate and reliable tracer gas monitor and our advanced application software to supervise the integrated system.
The portability of our solution is a key differentiator for field tests in real travelling conditions.
- Using a highly accurate, reliable and stable measurement principle with only a quite modest amount of tracer-gas
- Quick and easy measurements installation of the equipment
- The flexibility and portability of this solution for field tests in real travelling conditions
- User-friendly: easy calibration, configuration and measurement data presentation and analysis on PC
Easily configurable for any type of IR active tracer gas (SF6, Freons, …)
A typical set-up for measuring total airflow
The measuring equipment is placed in the trunk for the automobile and the laptop computer to control the measurement is placed on the front passenger seat, making the measurement system fully mobile. The tracer gas is dosed into the outdoor air intake and the tracer gas concentration is measured at the right foot well vent, the right side window defrost and the left windscreen defrost. The tracer gas measurment system is placed in the trunk of the car.