APPLICATION OF SUBTRACT AND OPERATE METHOD FOR DEVELOPING FUNCTION ENERGY STRUCTURES OF PRODUCTS AND SYSTEMS - A RULE-GUIDED APPROACH
Year: 2015
Editor: Christian Weber, Stephan Husung, Gaetano Cascini, Marco Cantamessa, Dorian Marjanovic, Monica Bordegoni
Author: Markos, Panagiotis; Dentsoras, Argyris
Series: ICED
Institution: University of Patras, Greece
Section: Design for Life
Page(s): 259-268
ISBN: 978-1-904670-64-3
ISSN: 2220-4334
Abstract
The relation between functionality and energy efficiency of products and systems is examined. An extended configuration of Function Structure scheme is proposed and named as Function Energy Structure (FES). (FES) represents in a qualitative, yet detailed manner, the actual functions performed by the components (assemblies, subassemblies or parts) of a product and depicts the energy type(s) used and the energy transformations and losses that take place. (FES) indicates also the components used for the embodiment of each separate function. In (FES), the represented functions are in general form-independent. However, some functions may be related to certain components if the latter embody the product s working principle. For the formulation of (FES), a Subtract and Operate approach is used that locates product functions. These functions are then transferred to a proper Function Structure form, where all necessary material and energy notations are added. The whole process is rule-guided and for that reason sets of proper rules are introduced. A case study of a traction elevator serves as a reference example and contributes to better perceiving and understanding of the proposed method.
Keywords: Design Methods, Ecodesign, Functional Modelling, Energy Efficiency, Reverse Engineering