Model-based temperature measurement technique to quantify the dynamic three-dimensional air freshness flow in the interior of a car. (24th February 2004)

• Record Type: Journal Article
• Authors: Quanten, S.; Van Brecht, A.; Van Hirtum, A.; Janssens, K.; Aerts, J.M.; Berckmans, D.
• Is Part Of: International journal of vehicle design. Volume 34:Number 3(2004)
• Page Start: 218
• Page End: 230
• Publication Date: 2004-02-24
• Subjects: modelling -- temperature gradients -- thermal comfort -- imperfectly mixed fluids -- transfer function -- traffic safety -- air freshness -- model-based -- car interiors; Motor vehicles -- Design and construction -- Periodicals; 629.231
• Languages: English
• ISSNs: 0143-3369

Abstract

A data-based mechanistic (DBM) approach was used to model the spatio-temporal temperature distribution in the imperfectly mixed fluid in a car. The first phase of DBM involves the identification of a mathematical model from experimental data. A second order model proves to deliver a sufficiently good description of the temperature dynamics of the system (R² = 0.985). Furthermore, the physical interpretation of this second order model provides a useful variable. The physical meaning of one of the model parameters is what is called the local volumetric concentration of fresh air flow inside the car. It thus becomes possible to quantify the local air freshness in a complex geometric space as the interior of a car, only using simple temperature measurements. This technique could become a valuable tool in evaluating the performance of for instance climate controllers in interior spaces.