Assessment of Dan-iso A/S insulation
Authors
Valenta, Martin ; Zséli, Márk
Term
4. Term
Education
Publication year
2023
Submitted on
2023-01-12
Pages
117
Abstract
This thesis assesses two mechanical recycling methods for rigid polyurethane (PUR) developed by Dan-iso A/S that are not currently used by other companies. Because end‑of‑life PUR insulation is typically incinerated, Dan-iso aims to divert both production scrap and construction waste into a circular economy. The study examines how recycled PUR differs from virgin PUR through laboratory measurements of thermal conductivity, microstructural characteristics (stereo microscopy), and compressive strength on samples from fine- and coarse‑granulated processes with recycled content up to 45%. Findings indicate that both methods are technically and commercially feasible, that environmental impacts are reduced compared with virgin PUR, and that production costs decrease, potentially improving market attractiveness. In addition, the recycled materials are evaluated in an external wall renovation of a case building and benchmarked against other insulation options using life cycle assessment (LCA) and life cycle cost (LCC); the calculations provide a basis for comparing competitiveness. More detailed comparative outcomes beyond feasibility, lower environmental impact, and reduced production price are not provided in the excerpt.
Dette speciale vurderer to mekaniske genanvendelsesmetoder for hårdt polyurethan (PUR) udviklet af Dan-iso A/S, som i øjeblikket ikke anvendes af andre virksomheder. Baggrunden er, at PUR-isolering typisk bliver forbrændt ved slutningen af levetiden; Dan-iso sigter mod at bringe både egen produktionsaffald og byggeaffald ind i en cirkulær økonomi. Studien undersøger, hvordan genanvendt PUR adskiller sig fra jomfruelig PUR, gennem laboratoriemålinger af varmeledningsevne, struktur (stereomikroskopi) og trykstyrke på prøver fra to processer (fin- og grovgranulering) med genanvendelsesindhold op til 45 %. Resultaterne indikerer, at begge metoder er teknisk og markedsmæssigt gennemførlige, at det miljømæssige aftryk er lavere end for jomfruelig PUR, og at produktionsprisen falder, hvilket kan gøre produktet mere konkurrencedygtigt. Desuden sammenlignes materialets anvendelse i en case-bygnings renovering (ydervæg) med andre isoleringsløsninger ved hjælp af livscyklusvurdering (LCA) og livscyklusomkostninger (LCC); beregningerne giver et grundlag for at vurdere materialets attraktivitet i forhold til alternativer. Detaljerede sammenligningsresultater udover gennemførlighed, reduceret miljøpåvirkning og lavere produktionspris er ikke angivet i uddraget.
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Keywords