Exergy concept and its implementation in the recycling of metals
| Autor: | Zvonko Gulisija, Branislav Marković, Miroslav Sokić, Vaso Manojlović, Dragana Zivkovic, Ilija B. Ilić, Nada Štrbac |
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| Rok vydání: | 2017 |
| Předmět: |
Exergy
quality losses Product design Waste management kvalitativni gubici Process (engineering) media_common.quotation_subject exergy concept Resource efficiency Scrap recycling Contamination reciklaža 12. Responsible consumption contamination kontaminacija Environmental science Production (economics) General Materials Science Quality (business) eksergijski koncept media_common |
| Zdroj: | Zaštita materijala Zaštita materijala (2017) 58(1):100-103 |
| ISSN: | 2466-2585 0351-9465 |
| DOI: | 10.5937/zasmat1701100m |
| Popis: | Modern industrial product design implies presence of many different materials. Consequently, in the recycling process, shredding and separation procedures are applied. However, all materials cannot be completely separated; therefore, there is a contamination in the recycling streams. The quality of the materials streams can be reduced in each of the following recycling steps. These qualitative losses cannot be described by material balance. This paper presents the concept of exergy as a measure of quality losses, and gives the methods for the calculation of the exergy content and the exergy loss. Losses attributed to the recycling or material losses, material contamination losses and dilution requirements can be used as indicators for the materials quality loss as well as for the resource efficiency in the production systems. In this paper, the example of calculations on the steel scrap is presented. Dizajn modernih industrijskih proizvoda je takav da oni predstavljaju kompleksne spojeve različitih materijala. Zbog toga se u postupku reciklaže materijala primenjuju procesi usitnjavanja i razdvajanja. Međutim materijali se ne mogu u potpunosti razdvojiti i zbog toga dolazi do kontaminacija u reciklažnim tokovima. Zbog toga se kvalitet materijala može smanjivati u svakom narednom reciklažnom koraku. Ovakvi kvalitativni gubici ne mogu se opisati masenim bilansom, i u radu je prikazan eksergijski koncept kao merilo gubitaka kvaliteta, odnosno dat je metod za izračunavanje eksergijskog sadržaja i eksergijskog gubitka. Gubici pripisani reciklaži ili tačnije materijalni gubici, gubici usled kontaminacije drugim metalima i posledično potreba za razblaživanjem, mogu se koristiti kao indikatori gubitka kvaliteta materijala i efikasnosti korišćenja resursa u proizvodnim sistemima. U radu je dat primer proračuna na čeličnom otpadu. |
| Databáze: | OpenAIRE |
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