Zoekresultaten

The challenge of implementing green gas into the gas supply

In order to gain a more mature share in the future energy supply, green gas supply chains face some interesting challenges. In this thesis green gas supply chains, based on codigestion of cow manure and maize, are considered. The produced biogas is upgraded to natural gas quality and injected into the existing distribution gas grid and thus replacing natural gas. Literature research showed that relatively much attention has been paid up to now to elements of such supply chains. Research into digestion technology, agricultural aspects of (energy) crops and logistics of biomass are examples of this. This knowledge is indispensable, but how this knowledge should be combined to help understand how future green gas systems may look like, remains a white spot in the current knowledge. This thesis is an effort to fill this gap. A practical but sound way of modeling green gassupply chains was developed, taking costs and sustainability criteria into account. The way such supply chains can deal with season dependent gas demand was also investigated. This research was further expanded into a geographical model to simulate several degrees of natural gas replacement by green gas. Finally, ways to optimize green gas supply chains in terms of energy efficiency and greenhouse gas reduction were explored.

Food supply chain demand and optimization

Food security depends on a network of actors and elements working together to produce and deliver healthy, sustainable, varied, safe and plentiful food supply to society. The interactions between these actors and elements must be designed, managed and optimized to satisfy demand. In this chapter we introduce Food Supply Chain Optimization and Demand, providing a framework to understand and improve food security from an operational and strategic point of view.

Energy self-sufficiency and sustainability in a defined neighbourhood: Bio-methanation to green gas can outperform green hydrogen

In Europe, green hydrogen and biogas/green gas are considered important renewable energy carriers, besides renewable electricity and heat. Still, incentives proceed slowly, and the feasibility of local green gas is questioned. A supply chain of decentralised green hydrogen production from locally generated electricity (PV or wind) and decentralised green gas production from locally collected biomass and biological power-to-methane technology was analysed and compared to a green hydrogen scenario. We developed a novel method for assessing local options. Meeting the heating demand of households was constrained by the current EU law (RED II) to reduce greenhouse gas (GHG) emissions by 80% relative to fossil (natural) gas. Levelised cost of energy (LCOE) analyses at 80% GHG emission savings indicate that locally produced green gas (LCOE = 24.0 €ct kWh−1) is more attractive for individual citizens than locally produced green hydrogen (LCOE = 43.5 €ct kWh−1). In case higher GHG emission savings are desired, both LCOEs go up. Data indicate an apparent mismatch between heat demand in winter and PV electricity generation in summer. Besides, at the current state of technology, local onshore wind turbines have less GHG emissions than PV panels. Wind turbines may therefore have advantages over PV fields despite the various concerns in society. Our study confirms that biomass availability in a dedicated region is a challenge.

More than just chocolate

Côte d’Ivoire produces about 42 percent of the world’s total Cocoa but processes only a very few amount of the production. A big part of the country depends on the commercial benefits of the Cocoa production and supply chain of it. For that reason, the World Bank asked the simulation group of the Amsterdam U. of Applied Sciences in collaboration with the Port of Amsterdam to develop a simulation model that allows the politicians assess the performance of the supply chain of the Cocoa in that region of the world. The simulation model gave light to the potential of improvement in the supply chain by identifying inefficiencies, bottlenecks and blockers that hinder the efficient transport of Cocoa in the chain with the consequence of low productivity. The most important results are presented in the article together with suggestions for improvement in order to increase the wellbeing of the farmers in that region of Africa.

Green supply chain management, marketing tool or revolution

More Than Just Chocolate: Supply Chain Model of Production of Cocoa Crops in Côte d'Ivoire

Côte d’Ivoire produces about 42 percent of the world’s total Cocoa but processes only a very few amount of the production. A big part of the country depends on the commercial benefits of the Cocoa production and supply chain of it. For that reason, the World Bank asked the simulation group of the Amsterdam U. of Applied Sciences in collaboration with the Port of Amsterdam to develop a simulation model that allows the politicians assess the performance of the supply chain of the Cocoa in that region of the world. The simulation model gave light to the potential of improvement in the supply chain by identifying inefficiencies, bottlenecks and blockers that hinder the efficient transport of Cocoa in the chain with the consequence of low productivity. The most important results are presented in the article together with suggestions for improvement in order to increase the wellbeing of the farmers in that region of Africa.