[Due to the increasing size of the archives, each topic page now contains only the prior 365 days of content. Access to older stories is now solely through the Monthly Archive pages or the site search function.]
Ricardo in EU-funded HDGAS; seeking >30kW/L, 10% improvements in power, torque and GHG in natural-gas fueled heavy-duty trucks
September 23, 2015
Ricardo is one of 19 collaborating commercial and academic partners in the European Commission’s Horizon 2020 Green Vehicle Initiative project HDGAS—a project that aims to develop, demonstrate and optimize advanced powertrain concepts for dual-fuel and pure natural gas-powered heavy duty vehicles. Particular areas of focus for the company will be the development of engine and aftertreatment systems that offer the prospect of delivering real driving emissions well below Euro VI limits for heavy duty vehicles.
Long haul trucks are an essential element of the transportation mix of modern, industrialized society. They are, however, inherently less amenable to the type of electrification and hybridization strategies that are already contributing to reduced carbon emissions and potential long-term sustainability for the light vehicle sector. A key global imperative is, therefore, the substantial improvement of heavy vehicle engine efficiency and reduction of environmental impact.
Clean Energy to build new CNG stations for multiple transit agencies and large school district; agreements with trucking, refuse and others
August 26, 2015
Clean Energy Fuels Corp. will construct new compressed natural gas (CNG) stations for Arlington Transit (ART) in Arlington County, Virginia; Nassau Inter-County Express (NICE) in Long Island, NY; and North Kansas City (MO) School District, which is set to become the largest school district in the US to transition its school bus fleet to CNG. The company also announced additional agreements across transportation market segments of transit, refuse, trucking and the bulk fuel market.
Transit. NICE has awarded Clean Energy the contract to design, build and operate and maintain a new CNG station that will, upon completion, replace its existing Mitchel Field station, and operate and maintain the existing CNG stations. The five-year contract valued at just over $13 million will extend the partnership between NICE and Clean Energy and will support a fleet of over 200 CNG buses. Clean Energy currently supports another 100 CNG buses at an additional station and provides a total of 4.6 million GGEs of CNG annually for the NICE bus fleet. Completion of the new station is expected for summer 2017.
Next-generation LNG carrier concept about 8% more energy efficient, with 5% more cargo
July 23, 2015
DNV GL announced the completion of the LNGreen joint industry project, which worked to develop a state-of-the-art next-generation LNG carrier. (Earlier post.) The LNGreen joint industry project brought together experts from DNV GL and industry specialists from GTT (cryogenic membrane containment systems for LNG); shipbuilder Hyundai Heavy Industries; and shipowner GasLog.
Each of the project partners contributed their know-how and experience, to develop a next-generation LNG carrier using the latest technology, within the bounds of existing shipbuilding methods. The vessel concept has a significantly improved environmental footprint; a higher level of energy efficiency (up to 8% improvement); as well as an improved boil-off rate and cargo capacity (+5%), making it much better suited to future trading patterns than existing vessels.
Study: natural gas heavy-duty trucking fleet could benefit economy, but has mixed environmental effects
February 20, 2015
Switching from diesel fuel to natural gas may hold advantages for the US heavy-duty trucking fleet, but more needs to be done to reach the full environmental benefits, according to a new white paper released by the Institute of Transportation Studies at the University of California, Davis, and Rice University.
The recent shale-driven emergence of natural gas as an abundant, inexpensive fuel in the US has raised the possibility of a “momentous shift” in the level of natural gas used in transportation. The cost advantage of natural gas over diesel fuel is particularly appealing for vehicles with a high intensity of travel and thus fuel use. In the paper, the team investigated the possibility that natural gas could be utilized to provide fuel cost savings, geographic supply diversity and environmental benefits for the heavy-duty trucking sector—and whether it can enable a transition to lower carbon transport fuels.
MHI completes development of next-generation LNG carrier; apple-shaped tanks and hybrid propulsion
November 29, 2014
|Sayaringo STaGE. Click to enlarge.|
Mitsubishi Heavy Industries, Ltd. (MHI) has completed development of the “Sayaringo STaGE,” a next-generation LNG (liquefied natural gas) carrier. The Sayaringo STaGE was developed as a successor to the Sayaendo (earlier post), the company’s LNG carrier evolved from carriers with Moss-type spherical tanks that offer a high level of reliability. (Moss-type LNG carriers use independent spherical cargo tanks supported by a cylindrical skirt integrated with the hull and covered with a hemispherical steel cover attached to the main deck.)
While the Sayaendo (sayaendo = peas in a pod in Japanese) features a peapod-shaped continuous cover for the Moss spherical tanks that is integrated with the ship’s hull, in lieu of a conventional hemispherical cover, the new Sayaringo (ringo being the Japanese word for “apple”) STaGE adopts apple-shaped tanks, resulting in nearly a16% increase in LNG carrying capacity without changing the ship’s width. Further, a hybrid propulsion system has boosted fuel efficiency by more than 20% compared to the Sayaendo (and more than 40% vis-à-vis earlier carriers).