Is Aviation Technology going in the right direction regarding Climate Impact?

The aviation industry is shouting out its aim to reach ”net-zero carbon” by 2050. Nevertheless, air traffic is expected to grow up until then, and if fuel consumption is reduced by new technologies and aircraft, other sources of global<br/>warming such as N Ox emissions and contrails are less considered. Therefore, the climate impact improvement...

The geographical scale of a circular economy: Introducing a framework to determine a relevant geographical scale for the recycling of materials, based on a case study of concrete and copper for the Municipality of Leiden

The implications of a CE and the transition towards it are widely researched. However, there is a lack of research into the relevant geographical scales of CE. Thus, this research aims to present a framework that identifies the optimal geographical scale for the recycling of materials based on various factors. The framework is tested against a...

Quantifying and visualising anthropogenic emissions of CO2 in the urban environment: Exploring trends in the spatial distribution of emissions

About 75 percent of CO2 emissions caused by the combustion of fossil fuels stem from cities. Climate policy minimising the amount of emitted carbon can not be evaluated without accurate quantification of CO2 emissions.<br/>Not only the amount of emitted carbon is of interest, but also being able to place emissions in both the spatial as well as...

Static back-pressure effects on the performance of a dual-fuel engine

The use of fossil fuels and their impact on humans and nature is becoming a bigger concern worldwide. An interesting concept to lower polluting emissions coming from maritime engines is the combined use of a dual-fuel engine and an underwater exhaust system. In the dual-fuel engine natural gas is used as the main fuel type. It is seen as a...

Assessment of the Climate Impact Mitigation Potential of Intermediate Stop Operations: A Dynamic Programming Approach

<br/>Aviation emissions present a significant contribution to climate change. The rate at which new technology is developed cannot suffice the emission reduction requirements for the growth of this industry. Therefore, new areas of improvement, such as operational changes, should be considered. The inclusion of stop-overs in long-haul routes can...

reduction of the emissions for trailing suction hopper dredges during operation

The International Maritime Organisation (IMO) is a specialized agency responsible for the safety and security of shipping and the prevention of marine and atmospheric pollution by ships. Air pollution is one of the contributors, CO2 emission is recognised as the biggest contributor to the increasing temperature of the Earth. Global warming is a...

Improving identification of HT-ATES performance drivers and -barriers

High temperature aquifer thermal energy storage (HT-ATES) can potentially solve the mismatch between heat supply and demand. It can provide a large scale seasonal heat storage solution. Thereby it enables an increase in full load hours of the base heat source, which can benefit project performance on both costs and emissions. However, the...

Prediction of emissions from combustion systems using 0D and 1D reacting flow models

Emission prediction is a complex problem involving the coupling between the flow field and chemistry. Most of the time CFD is the preferred modeling approach, yielding predictions with varying degrees of accuracy. But because of a high computational cost, CFD investigations are often limited to the use of reduced chemical mechanisms. In this...

Positive Impact With Community Currencies

Money is an essential technology used by many people around the globe every day. It is beneficial for efficient trade and saving. The aim of this graduation is to design money. A positive impact on the environmental is made with the design of a so called community currency. In the economy we stumble upon limits which the market cannot easily...

A Low Emissions Taxi Movement Planning Tool

The goal of this research project was to develop and test an online, automated taxi movement planning tool, that optimizes the timed taxiing routes of all aircraft on an airport, by minimizing the impact on the environment. Automatic taxi planning tools have been developed before, but the emissions have never been included before as a factor in...