From the conference paper : "The authors examined how to improve the total (onsite and offsite) labour productivity of production and assembling of fast retrofitting concepts in the Netherlands. The authors analysed the collected data of two NetZero energy renovations in which the initial process were quite traditional. In the first case the labour productivity can increase spectacularly by prefabricating the roof. In the second case the providers modernized the process by working in multi-disciplinary teams. No evidence have been found that working in a multi-disciplinary team can increase the labour productivity but the time for realization did decrease."
DOCUMENT
Due to climate change the frequency of extreme precipitation increases. To reduce the risk of damage by flooding, municipalities will need to retrofit urban areas in a climate-resilient way. To justify this investment, they need insight in possibilities and costs of climate-resilient urban street designs. This chapter focused on how to retrofit characteristic (Dutch) typologies of urban residential areas. For ten cases alternative street layouts were designed with a determination of the life cycle costs and benefits. All designs are resilient to extreme rain events. The results show that most flat urban typologies can easily be retrofitted in a climate-resilient way without additional costs compared to the standard way of retrofitting. Climate proofing sloping areas are highly dependent on the situation downstream. When there is no space downstream to divert the water into waterways or parks, costs to provide storage easily rise above traditional levels for retrofitting. In addition to reducing flood risk, for each case one variant includes resilience to extreme heat events making use of green. The life cycle costs and benefits of the green variants showed that especially green designs in high-density urban areas result in a better value for money.
MULTIFILE
The growing demand for both retrofitting and refitting, driven by an aging global fleet and decarbonization efforts, including the need to accommodate alternative fuels such as LNG, methanol, and ammonia, offers opportunities for sustainability. However, they also pose challenges, such as emissions generated during these processes and the environmental impacts associated with the disposal of old components. The region Rotterdam and Drechtsteden form a unique Dutch maritime ecosystem of port logistics, shipbuilding, offshore operations, and innovation facilities, supported by Europe’s largest port and world-class infrastructure connecting global trade routes. The Netherlands’ maritime sector, including the sector concentrated in Zuid-Holland, is facing competition from subsidized Asian companies, leading to a steep decline in Europe’s shipbuilding market share from 45% in the 1980s to just 4% in 2023. Nonetheless, the shift toward climate-neutral ships presents economic opportunities for Dutch maritime companies. Thus, developing CE approaches to refitting is essential for promoting sustainability and addressing the pressing environmental and competitive challenges facing the sector and has led companies in the sector to establish the Open Joint Industry Project (OJIP) called Circolab of which this PD forms the core.
The energy transition is a highly complex technical and societal challenge, coping with e.g. existing ownership situations, intrusive retrofit measures, slow decision-making processes and uneven value distribution. Large scale retrofitting activities insulating multiple buildings at once is urgently needed to reach the climate targets but the decision-making of retrofitting in buildings with shared ownership is challenging. Each owner is accountable for his own energy bill (and footprint), giving a limited action scope. This has led to a fragmented response to the energy retrofitting challenge with negligible levels of building energy efficiency improvements conducted by multiple actors. Aggregating the energy design process on a building level would allow more systemic decisions to happen and offer the access to alternative types of funding for owners. “Collect Your Retrofits” intends to design a generic and collective retrofit approach in the challenging context of monumental areas. As there are no standardised approaches to conduct historical building energy retrofits, solutions are tailor-made, making the process expensive and unattractive for owners. The project will develop this approach under real conditions of two communities: a self-organised “woongroep” and a “VvE” in the historic centre of Amsterdam. Retrofit designs will be identified based on energy performance, carbon emissions, comfort and costs so that a prioritisation strategy can be drawn. Instead of each owner investing into their own energy retrofitting, the neighbourhood will invest into the most impactful measures and ensure that the generated economic value is retained locally in order to make further sustainable investments and thus accelerating the transition of the area to a CO2-neutral environment.
De verplichting in de Binnenvaart om haar emissies te reduceren leidt tot grote uitdagingen in de sector, omdat nieuwe technologie in bestaande schepen tot problemen leidt en vaak een te grote investering vraagt. VIV, de branchevereniging van inbouw-, reparatie- en revisiebedrijven, heeft zich uitgesproken voor het gebruik van hernieuwbare methanol. Het ontbreekt de bedrijven echter aan kennis en vaardigheid over de conversie van een bestaande dieselmotor naar hernieuwbare methanol. De methanol industrie, verenigd in het Methanol Institute, zet zich in voor het gebruik van methanol in de scheepvaart. In de Zeevaart is al ervaring opgedaan met hernieuwbare methanol, maar de schaal en technologie verschilt met die in onze Binnenvaart. VIV en het Methanol Institute hebben de HAN benaderd met de vraag om de kennis en vaardigheid in gebruik van hernieuwbare methanol in scheepsmotoren te vergroten. De HAN beantwoordt deze marktvraag in 4 werkpakketten waar het draait om de retrofit conversie van een bestaande binnenvaartaandrijving, op een praktisch toepasbare manier. Ze maakt hier een vertaalslag van de wetenschap en kennis bij grote zeevaartmotoren, naar het binnenvaart-MKB. Dit gebeurt door te onderzoeken binnen welke kaders, en met welke indicatoren tijdens het afstellen van een onderzoeksmotor, een optimale methanol dual-fuel motor opgezet kan worden. Het hoofddoel is het verhogen van de kennis en vaardigheid over dual-fuel motoren op Hernieuwbare Methanol in de reparatie- en revisiesector. Het Schoon Schip project combineert de opgedane kennis met kennis uit de academische wereld, en de motorervaring van alle partners, om tot een betrouwbare toepassing van methanol in de binnenvaart te komen. Het gaat er om tot een werkende praktijkoplossing te komen voor het gebruik van hernieuwbare methanol in de bestaande vloot van 12.000 binnenvaartschepen.
