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In this study, a scaling of a series of high level built environment energy models has been introduced, enabling an assessment of energy trade-offs in terms of selected dimensionless governing parameters. The developed models' additional objective is to offer a tool needed to assess the order of magnitude estimates of an influence a system may have on the environment in terms of both the resources...
In this paper we address the problem of taking the general notion of sustainability as reported in the Brundtland Report and later in Arrow et al approach and interpreting it from a thermodynamics point of view, with a goal of developing operational principles of sustainability in terms of physical principles that complement economic views.
Thermodynamics provides a value system and rules for evaluating separation and recycling systems. After a brief development to calculate the minimum work required to separate an ideal mixture, we review what thermodynamics has to say about four questions: 1) What gets recycled? 2) What gets lost? 3) What gets saved? and 4) How can we improve the system.
In this paper, we present the formulation of a framework for the quantitative thermodynamic analysis of manufacturing processes and systems. Since manufacturing typically involves the input of high-quality material/energy and/or dissipation of low-quality energy/waste to manipulate a material, an approach that combines both the first and the second laws of thermodynamics is appropriate. This formulation...
Wind turbine farms are an effective generator of electricity in windy parts of the world, with prices progressing to levels competitive with other sources. Choosing the correct turbine for a given installation requires significant engineering and the current trend leads towards groups of large horizontal axis turbines. Unfortunately, large wind turbines have to contend with large forces and other...
This work focuses on developing a compact representation of the material recycling potential for products at end-of-life. This representation is based on two measures: the value of the materials used in a product and the mixture of materials used in a product. These measures are similar to those used in constructing the Sherwood plot, which relates metal prices to the concentration of metals in a...
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