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Environmental aspects Eco-Efficiency An assessment based on the specific TEWI value takes into account the effects of glob- al warming during the operating period of a refrigeration, air conditioning or heat pump installation. However, not the entire ecologi- cal and economical aspects are considered. But apart from ecological aspects, economi- cal aspects are highly significant when eval- uating technologies and making investment decisions. With technical systems, the reduction of environmental impact frequent- ly involves high costs, whereas low costs often have increased ecological conse- quences. For most companies, the invest- ment costs are decisive, whereas they are often neglected during discussions about minimizing ecological problems. For the purpose of a more objective assess- ment, studies* were presented in 2005 and 2010, using the example of supermarket refrigeration plants to describe a concept for evaluating Eco-Efficiency. It is based on the relationship between added value (a product's economic value) and the resulting environmental impact. Concept of Eco-Efficiency With this evaluation approach, the entire life cycle of a system is taken into account in terms of: o ecological performance in accordance with the concept of Life Cycle Assess- ment as per ISO 14040, o economic performance by means of a Life Cycle Cost Analysis. This means that the overall environmental impact (including direct and indirect emis- sions), as well as the investment costs, operating and disposal costs, and capital costs are taken into account. The studies also confirm that an increase of Eco-Efficiency can be achieved by investing in optimized plant equipment (minimized operating costs). Hereby, the choice of refrigerant and the associated system tech- nology play an important role. Eco-Efficiency can be illustrated in graphic representation (example, see Fig. 5). The results of the Eco-Efficiency evaluation are shown on the x-axis in the system of coordi- nates, whilst the results of the life cycle cost analysis are shown on the y-axis. This shows clearly: A system that is situated higher in the top right quadrant exhibits an increasingly better Eco-Efficiency – and conversely, it becomes less efficient in the bottom left sector. The diagonals plotted into the system of coordinates represent lines of equal Eco- Efficiency. This means that systems or pro- cesses with different life cycle costs and environmental impacts can quite possibly result in the same Eco-Efficiency. * Study 2005: Compiled by Solvay Management Support GmbH and Solvay Fluor GmbH, Hannover, together with the Information Centre on Heat Pumps and Refrigeration (IZW), Hannover. Study 2010: Compiled by SKM ENVIROS, UK, commissioned by and in cooperation with EPEE (European Partnership for Energy and Environment). Both projects were supported by an advisory group of experts from the refrigeration industry. Fig. 4 Concept of Eco-Efficiency Fig. 5 Example of an Eco-Efficiency evaluation 7PDF Image | REFRIGERANT REPORT 21
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