Comparing indicators to rank strategies to save potable water in buildings
| Autor: | Enedir Ghisi, Yuri Triska, Ricardo Forgiarini Rupp |
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| Rok vydání: | 2014 |
| Předmět: |
Consumption (economics)
Economics and Econometrics Engineering business.industry Internal rate of return Energy consumption Environmental economics Investment (macroeconomics) Greywater Net present value Rainwater harvesting Water resource management business Waste Management and Disposal Embodied energy |
| Zdroj: | Resources, Conservation and Recycling. 87:137-144 |
| ISSN: | 0921-3449 |
| Popis: | The main objective of this paper is to compare indicators based on energy consumption and financial savings to rank strategies to save potable water in buildings. The method is based on potable water savings, embodied energy, energy consumption for operation, and investment feasibility analysis; and it was applied to a school in the city of Florianopolis, southern Brazil. The strategies considered to save potable water were rainwater, greywater, water-efficient appliances, and their combinations. The embodied energy was estimated using indices of embodied energy per mass of material, and labour. The indicators used to rank the strategies were potential for potable water savings, index between potable water savings and embodied energy or total energy consumption, net present value, internal rate of return, discounted payback, and index between potable water savings and initial costs. All strategies and combinations were feasible, but the use of water-efficient appliances was the best. Amongst the indicators used to rank the strategies, five of them led to the same ranking. Such indicators can be applied to rank potable water saving strategies in other types of buildings and climates. |
| Databáze: | OpenAIRE |
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