Early environmental assessment of products using behavior models and the impact of their inaccuracy on environmental product performance

Abstract

The decisions made during the preliminary design phases considerably impact the development of a product's lifecycle, acting on its environmental performance, cost, and duration of its realization. However, the lack of relevant information during these phases does not allow for the accurate evaluation of design solutions. In addition, it generates schedule delays and overruns in the budget allocated to developing a given solution. In this perspective, the present work aims to assess the accuracy of the behavior models used for exploring solutions during the embodiment phase. This was based on two measures of different nature, namely objective accuracy, which is evaluated by referring to real prototyping of a given solution, and the subjective accuracy measure, which allows to the expression of the degradation of the first measure in relation to the reference point. This combination will lead to a measure that can be generalized on all the design space. In a second step, the current work suggests an estimation of the effect of these models' accuracy on the proposed solutions' environmental impact. To this end, a sensitivity study was carried out on the input data of the model (design parameters) in order to deduce the effect of the results obtained (performance parameters) on the mass and, consequently, the environmental impact of the solution. In order to highlight the approach adopted in the present study, it was applied to a real industrial case, ultimately leading to the most optimized solution in terms of accuracy and environmental impact.

Early Environmental Design of Solar Collector with Consideration for Parameter Variability

“…Indeed, the determination of design parameters, including mass, is carried out based on the use of behavior models suited for these phases [24]. Generally, these models serve to: (i) assess performance parameters that embody design objectives, and (ii) identify design parameters best suited to achieve the design goals envisioned by the company.…”

“…indicators, or a singlescore indicator resulting from a combination of these two types of indicators. Several LCA calculation methods enable obtaining a single-score indicator, with the Recipe method being the most recent and comprehensive [24]. We also employ the SimaPro software for calculating the environmental indicator, carried out according to the following formula:…”