Starting point I asked myself: do hydrogen drones exist already? And if so, what is their performance and cost? Why hydrogen drones? Electric aviation runs on hydrogen and fuel cells. Current battery technology lacks the energy density required, unlike hydrogen fuel cells. Current recordist electric aircraft use hydrogen as their primary fuel. But do fuel…

Starting point Why do enclosed motorcycles not get public adoption, and will transport electrification increase adoption? What is an enclosed motorcycle? Enclosed motorcycles (EM) is a self-descriptive term: they are motorcycles (or close relatives) that approximate cars by sporting a protective shell around them (see Figure 1). EMs are also called cabin motorcycles.

Part 3 on emerging air conditioning technologies — Starting point As climate change warms the world, we need to switch our current air conditioning technology; precisely because of climate change. So we need alternatives; is the ionocaloric cooling and heating an option? The current air conditioning danger The current air conditioning (CAC) technology relies on refrigerants put into cycles of liquid and vapor. The refrigerants…

Starting point How do current electric motorcycles fare to their gas counterparts? The advantages of electric motorcycles The first advantage of electric motorbikes is their engines. Electric engines are more efficient, making them lighter for the same power. The lower weight helps to increase performance in itself. Torque is superior in electric motors, delivering more acceleration and…

The pitch Despite having lower emissions than other transportation means, trains must also go carbon-free: Is hydrogen an option? Current Powertrains Power-wise, currently, trains have two main options: electrified train lines and diesel trains. The emissions performance of trains running on electrified lines depends significantly on the carbon emissions of the electricity that feeds…

Introduction We need new air conditioning systems and elastic may be the way to go. Current air conditioning (AC) technology is over a hundred years old, creating environmental problems. AC consumes too much energy as more people worldwide adopt the technology. Particularly in the hottest hours of warm seasons, the accumulated…

Part 3 of a series on solar power technologies — The pitch The solar panel engine is the photovoltaic (PV cell), but how many types exist? There are tens of different technologies with many variations. This article is part 3 of a series examining PV cell technologies. A glance at PV cells generations With so many different technologies, a taxonomy that helps us navigate such complexity is helpful…

17 to 24 of March 2023 — EVs 24 March 2023 Polestar, the Swedish Electric Vehicle startup, reaches the top 10 in car sales overall in Germany with its Polestar 2 model. Its Polestar 2 two variants surpassed sales of the long versions of the Tesla Model 3 and Model Y. Via Electrek Environment/Renewable 21 March 2023 President Biden signs act to create Avi Kwa…

The pitch Let us eliminate our current air conditioning (AC) systems for new ones that do away with refrigerant fluids that threaten our environment and consume too much energy. The context Buildings were responsible for 30% of the world’s final energy consumption and 27% of emissions in 2021. …