Browse Topic: Ferries

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Modeling and Design of a PEM Fuel Cell System for Ferry Applications2023-24-014508/28/2023
The upcoming regulations to achieve zero-emission passenger transport present challenges for designing new ferry powertrains. The proposed work investigates the feasibility of using a Proton Exchange Membrane Fuel Cell (PEMFC) power system to power a long-haul ferry. The paper describes the zero-order cell model as well as the method for estimating cell degradation. The stack modeling, heat balance equations, and auxiliary modeling are also presented. The proposed model enables the simulation of the fuel cell under different operating conditions and includes the use of air or oxygen as an oxidizer. A thermal management strategy for the overall PEMFC system is also proposed. The model was calibrated on the characteristic curves of the PEMFC Ballard FCvelocity™ HD6 (150 kW) and validated by reproducing experimental results. Then, a real load profile of a ferry, as well as the proposed powertrain is considered as case study. The presented results are related to a single daily mission and
Saponaro, Gianmarco, Stefanizzi, Michele, Franchini, Emanuele, Torresi, Marco, Camporeale, Sergio
Technical Paper
SAE TOMORROW TODAY: Zero Emission Island Hopping with Seagliders1334110/06/2022
No airport security. 180 mph cruise speed. Zero emissions. This is the future of island hopping in coastal regions around the world made possible by a completely new mode of transportation: all-electric seagliders. As a pioneer in sustainable maritime mobility, REGENT recently achieved a revolutionary first in aviation for foil-to-wing take-off. We sat down with Billy Thalheimer, Co-Founder and CEO, REGENT, for an exclusive interview on his company's ground-breaking Wing-in-Ground Effect (WIG) technology. He explains how seagliders are essentially two vessels in one - a hydrofoil ferry in the harbor that can take off onto its wings. Staying within about a wingspan of the water, seagliders can service routes up to 180 miles with existing technology, and 500 miles with upgradeable batteries. Backed by some of the world's premier investors, including Mark Cuban, REGENT is transforming regional air travel, decarbonizing maritime, and pioneering the first successful foil-to-wing flight
Hineman, Marcie
Podcast
Chip-Based Power Measurement SensorTBMG-2701906/01/2017
Phone signals spend at least some time traveling over fiber-optic cables. To ensure that the information gets where it needs to go, and to help researchers find better ways to ferry this information around, it’s necessary to reliably measure radiation power through these fibers. In order to calibrate a radiation power meter, researchers currently have to use a bulky cryogenic system and transfer the measurements to at least one other intermediate system. Each of these transfers increases uncertainties in the measurements, and the cryogenic systems are relatively rare and expensive to use and maintain
Magazine Article
Launch Escape System Advances Commercial Human SpaceflightTBMG-1098809/01/2011
Launch escape system Space Exploration Technologies (SpaceX) Hawthorne, CA 310-363-6000 www.spacex.com
Magazine Article
As Shuttle Era Ends, NASA Still Chasing DreamsTBMG-1045307/05/2011
This Friday, the Space Shuttle program is scheduled to launch its final flight. But as the shuttle era ends, new space vehicles continue to be developed -- even those that are not so new
Magazine Article
A Rapid Temperature Superposition Method to Determine Creep Behaviour of Thermoplastics for Automotive Electronics Applications2009-26-008301/21/2009
Recent developments in polymer technology have gained automotive industry's attention as a viable alternative for ubiquitous metals. Apart from the design loads envisaged, an automotive part is subjected to multiple environmental loads including variation in ambient temperature. In particular, several automotive electronics applications feature product placements in zones of high temperature (on-engine being the most severe with temperatures exceeding 125°C), which drive the material close to melting points. Exposure to such a harsh environment will have adverse effects on the components (particularly those made of plastics) whose life span is expected to be 20 years. This calls for better characterization of polymers to help predict their behavior during usage. The challenge lies in devising an effective experimental procedure backed with an analytical method to present the material property in a rapidly usable format for technical analysis. Traditional long-term creep test procedures
Kulkarni, Mukund, Krishna, Arvind
Technical Paper
EVA Operations Using the Spacelab Logistics Pallet for Hardware Deliveries2001-01-220107/09/2001
There are a large number of space structures, orbital replacement units (ORUs) and other components that must be transported to orbit on a regular basis for the assembly and maintenance of the International Space Station (ISS). Some of this hardware will be ferried on the Spacelab Logistics Pallet (SLP), which has a long and reliable history of space flight successes. The carrier is well used, well qualified, and very adaptable for repeated use in accommodating cargoes of various sizes and shapes. This paper presents an overview of past, present and future hardware design solutions that accommodate EVA operations on the SLP. It further demonstrates how analysis techniques and design considerations have influenced the hardware development, EVA operations, and compliance with human engineering requirements for the SLP
Hagale, Thomas J.
Technical Paper
Off-Highway Exhaust Gas After-Treatment:Combining Urea-SCR, Oxidation Catalysis and Traps93036303/01/1993
Primary measures, to reduce the NOx emissions from diesel engines, penalize the fuel consumption and aggravate the CO2 problem. Instead, an after-treatment system is proposed that permits optimum combustion and yet reduces the NOx by more than 95%. Such installations are in operation for more than five years. Successful deployment on a short-haul ferry, subject to highly cyclic operation, began in Spring 1992. The chief features are high space-velocity (25,000 1/h), urea as non-toxic reactant and rapid transient response. The attained results counter the misgivings about the SCR catalysis. Development aims at further halving the size thus facilitating service in off-highway vehicles such as locomotives and earth-movers. The integration of particulate traps using knitted micro-fibers is under development
Hug, H. T., Mayer, A., Hartenstein, A.
Technical Paper
AV-8B Operational Features for Rapid Deployment80122809/01/1980
The Marine Corps Vertical and Short Takeoff and Landing (V/STOL) AV-8B light attack aircraft's operational features will enhance the tactical air support required by the Rapid Deployment Force (RDF). With its ability for vertical and short takeoff and vertical landing, the AV-8B gives the RDF the potential to enhance basing flexibility. In addition to its unique V/STOL characteristics the AV-8B has an unfueled ferry range of over 2000 nautical miles. It can also carry 2270 kilograms (5000 pounds) of ordnance to 500 nautical miles radius without refueling
Showers, R.G.
Technical Paper
Golden Gate Coordinated System-Commuting By Land and By Sea76062502/01/1976
This paper describes the growing automobile congestion within the Golden Gate Corridor and reviews an alternative means of public transportation through the use of buses and ferries. The paper outlines the planning and design criteria used in the selection of an optimum vessel and related terminal facilities. Three new Spaulding Class 165 foot, 750 passenger, vessels are presently under construction. These vessels will be all aluminum with a 25 knot power package consisting of gas turbine engines and waterjet pumps. Two modern marine passenger terminals have also been designed, with construction of one already completed
Kowleski, S. M.
Technical Paper
Shuttle Ferry Propulsion System73092802/01/1973
A unique propulsion system is being developed for the Space Shuttle Orbiter utilizing airbreathing engines to provide a means for horizontal flight testing and ferrying the Orbiter within the contiguous United States. Primarily, the NASA was concerned with ferrying the Orbiter from manufacturing site to launch site, but it was also recognized that on some occasions weather conditions or other emergency situations might dictate landing at alternate sites when returning from space missions. These situations would also require subsequent takeoff and ferry to a launch site. To fulfill these objectives, certain ground rules and criteria were selected, consisting primarily of takeoff capability on a hot day from a runway 10,000 feet in length, a 423 nautical mile minimum cruise range, engine out cruise ceiling of 10,000 feet, the use of existing engines, and an installation that was easily attached and removed from the Orbiter vehicle. The current ferry configuration, which meets these
Doell, James F.
Technical Paper
The ATL 98 Carvair Story62043701/01/1962
This paper gives the background to the story and some of the problems encountered in converting the Douglas DC-4 to its new role as a commercial vehicle ferry transport renamed the Carvair. The story has created considerable interest, probably because the vehicle ferry operation is unique, and secondly because the modification is about the largest successful one ever to be carried out
Leftley, Arthur C.
Technical Paper
Design Considerations and Selection of Controls for Vessels Equipped With Controllable-Pitch Propellers62038501/01/1962
The propulsion control system of a vessel equipped with a controllable pitch propeller is discussed along with factors influencing its design. These factors are the hull, propeller, and prime mover (diesel, gas-turbine, and steam) characteristics and the vessel's operating requirements. The system is also discussed in relationship to such special problems as vessels with a high displacement to horsepower ratio. The appendix includes a complete description of the propulsion control system in 352 ft passenger ferries
Wennberg, P. K.
Technical Paper
CONSIDERATIONS OF THE RENDEZVOUS PROBLEMS FOR SPACE VEHICLES60026801/01/1960
The problems involved in making a soft rendezvous in space are considered, as in the transfer of personnel or supplies from a ferry vehicle to a space station. The various phases of a complete rendezvous mission, such as the injection, approach, terminal, and acquisition phases, are brought out. Special attention is given to the penalties that arise due to errors in such quantities as velocity, altitude, orbital inclination, etc., and on schemes for correcting flight paths so as to use a minimum of fuel. Attention is also focused on the wait time that is involved before a rendezvous launch can be made. Wait periods of many days appear necessary if launch is to be made into the correct orbital plane, with a subsequent lead or lag correction, but wait periods of only about a day or two are feasible if launch is made into an incorrect orbital plane with a subsequent plane correction
HOUBOLT, JOHN C.
Technical Paper
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