Articles tagged with "transportation"
There are many unintended consequences as fuel supplies become more scarce and expensive. (With a h/t to Rune Likvern), I see that those Greeks who are being starved of affordable fuel are starting to chop trees down for warmth and income. This sort of desperation has devastated the countryside all over Albania, Africa, and Asia, and it is extremely difficult to stop the practice from spreading or to recover from it. The world expects that fuel must be available at an affordable price, and one of the ongoing questions is whether it will continue to be.
In that regard, BP has just released its Annual Energy Outlook 2030, examining how the world energy supply, and mix, will change in the years up to 2030. The booklet is an update from the study released last year, and reviewed at the time. This year the introductory speech by Bob Dudley focused on energy demand in China and India, Middle East exports, and transport fuel demand. BP sees overall energy demand growing some 40% over the next two decades, with virtually all growth coming from the developing countries. More than half will come from China and India alone. And of that energy, they anticipate that the supply will break out as follows:
This is a guest post by Jeff Radtke. Jeff is an independent researcher holding BS degrees in Nuclear Engineering and Physics, and an MS in Nuclear Engineering and Engineering Physics. He is a member of the American Physical Society and The Institute of Electrical and Electronic Engineers. In addition to recent work with electric bicycles, for the past 27 years he has been designing and building nuclear instruments for materials studies, medical, physics and educational applications. He is a longtime lurker, and recent poster on TOD as CyclemotorEngineer.
This post is based on an article published in 2008 in the peer-reviewed "Open Fuels and Energy Science Journal" as The Energetic Performance of Vehicles. The article showed that the accepted vehicle performance metric known as the Gabrielli-von Karman Limit is the same as twice the maximum vehicle kinetic energy divided by maximum motor output power. This result was not found in an extensive literature search.
This type of analysis is useful because it is easy to factor in conversion efficiencies and payload versus tare weight. Rather than use motor output power, one can use the thermal power theoretically available in the flowing fuel. EROI may be factored in, as well as GHG emissions. Analysis may be completed at the level of individual trips, vehicles, or an entire system with resource extraction, infrastructure development, manufacturing and direct fuel use.
Kinetic energy divided by required power is considered a residence time for the input energy in the utilized form. This model may provide an intuitive understanding of energy use. Residence time for anything in a container is the quantity residing divided by the flow rate. This is as true for a vehicle containing kinetic energy as it is for a mountain lake holding melted glacier, or the CO2 present in our atmosphere.
What is the Minimum EROI that a Sustainable Society Must Have? Part 3: Calculating the minimum EROI to support the U.S. transportation system
The following multi-part series is taken from a paper we published last year in the free, on-line journal Energies. You may access the entire PDF here. All references can be found in the pdf. Part 1 can be found here. Part 2 can be found here.
In this final installment of the Minimum EROI series we calculate the minimum EROI required from our energy sources to support the current transportation infrastructure of the U.S.
This is a guest post by Captain Michael Kellick. Captain Kellick has been serving in tall ships for fifteen years, sailing all along the west coast of North America, to Hawaii and across the Caribbean. He is presently working with the Los Angeles Maritime Institute and studies Art as Moral Action with American opera director Peter Sellars at UCLA. He attended the 2009 ASPO conference in Denver last October.
This is a guest post by Stuart Staniford. It was originally posted in Stuart's blog Early Warning.
The Chinese National Bureau of Statistics has a lot of interesting data. The web site is hard to use, at least in my browser, but after poking around in the html source of the pages, I've managed to figure out how to get to all the annual data, which let me make some graphs. I don't know how accurate these numbers are, but here, at any rate, is the official story.
1. IntroductionMany of the articles that discuss the causes and effects of humanity's unprecedented energy use are entirely theoretical, offering little practical guidance for the everyday reader.
This essay offers respite to all the people who confront our collective energy problems with a furrowed brow and an expression that is puzzled by the continuous stream of theoretical insights that explain our current circumstances. This essay confronts our collective energy problems in more practical terms - with an adjustable spanner and a puncture repair kit at the very least.
This is a guest post from Will Stewart. Will is a systems engineer in the DC area and previously has written several guest posts on The Oil Drum, including a series on Passive Solar Design.
As oil production falls and volatile oil prices in concert with a struggling economy induce a pattern of demand suppression/destruction, mobility choices will narrow and Vehicle Miles Traveled (VMT) will decline. What should governments at all levels be proactively preparing for? What should individuals and their families be preparing for in advance? The choices are broad: at a high level, land use planners could refine cities into a series of compact, carfree urban districts interconnected with mass transit. For the existing built-out suburban and exurban communities, however, such choices are limited. Aside from telecommuting, transportation choices will increasingly include biking, carpooling/vanpooling, bus rapid transit, and other efficient means of transportation. Travel between cities and countries will also undergo a transformation, with air travel becoming less and less affordable.
This series will cover current and projected land-based vehicle energy efficiency and a high level overview of the factors that determine it, such as aerodynamic drag, weight, efficiency of motive force (e.g., engine, motor), rolling resistance, driver behavior, drivetrain losses, parasitic losses, environmental factors, Passenger Miles Traveled (PMT), etc. In this first article of the series, we will focus on energy losses associated with aerodynamic drag losses, or more succinctly, “drag”.
|Tri Sled Avatar, a velomobile||Bus rapid transit in Cleveland|
On 21 October the final workshop was held in Brussels (Belgium) of the integrated transport and energy baseline until 2030 (iTREN-2030) modeling project. At the workshop a final scenario was presented that incorporated likely transport and energy policies, and the effects on European transport of a continued global plateau in oil production up to 2030. The integrated scenario was generated by four energy and transport models that have been linked in iTREN-2030 to increase the forecasting power of the transport policies of the European Commission.
In this post I describe the iTREN-2030 project and the different models, covering the POLES global energy supply and demand model in more detail, highlight the conclusions of the present integrated scenario, and give my reflection on the workshop commenting on some areas of improvement to augment the potential of the models.
The iTREN-2030 project is all the more important because the resulting model set and integrated scenario will be used by the European Commission (DG-Tren) in preparing the white paper on transport policies due for 2010. After discussion with the European Parliament and approval by the council of Minister, the European Union will as a result have set out its new course for the future of transport in the period up to 2020.
Road.cc has a review - Yike bike - is the future a folding, electric, penny farthing?.
Let's play a word association game: electric bike, penny farthing, folder, carbon fibre, Porsche… hard to build a mental image from that lot, but one day… that list will immediately make you think “Yike Bike”. Maybe.
What we have here is a folding electric bike that weighs less than 10Kg with a range of about 10Km and that is as easy to charge as a laptop and not that much bigger when folded, which the team behind it hope will one day be the transport of choice of the style-conscious buisnessman or urban commuter for the short hops from penthouse apartment to downtown office. And as for the “Yike” – well, that's what you say the first time your ride it, or at least the cleaned-up version.
A few weeks ago on a family vacation I made a pit stop along one of I-95’s fast-food dominated rest areas. I stood in horror at the sheer size of the people ambling out of their SUVs to load up on burgers, soda and fries. They were beyond just overweight or “fat”. I would say about half were morbidly obese. It was the intersection of our nation’s problems with automobiles, industrial food system and poor land use policies, all of which produced people that could barely manage to walk across the parking lot to load up on more empty calories.