An approach to mesoscale electric power production is presented which relies on a clean and efficient combustor coupled with a free-piston Stirling engine. The design and development of a catalytic combustor is discussed, whose main components are: a multiplexed electrospray to disperse jet propulsion fuel (JP-8), a stack of catalytically coated grids through which fuel conversion and heat rele...

Governmental policies and international treaties that aim at curbing the emissions of greenhouse gases and local pollutants can be expected. These regulations will increase the competitiveness of CO2-neutral energy sources, i.e., renewables, nuclear or fossil fuels with CO2-sequestration. The purpose of this paper is to assess the relative competitiveness of methanol and hydrogen as fuels in th...

Both evaporative emissions and tailpipe emissions have been reduced by more than 90% from uncontrolled levels in state-of-the-art. However, now that the objective is to reach near-zero emission levels, the need for aggressive purging of the canister and fuel tank and the need for extremely precise control of engine Air/Fuel ratio (A/F) come into conflict. On-board diagnostics and the wide varia...

The detection of minute amounts of wt),ter in any fuel-based system is important. Its presence in a large underground tank might be a sign of a leak where fuel is flowing into the water table and causing an environmental problem. A simple and effective means of real time monitoring of small concentrations of dissolved water in fuel tanks is therefore needed. Due to their polar molecular structu...

To investigate the movement characteristics of fuel within an aircraft’s tank during maneuvering, this study employs numerical simulations using Finite Pointset Method (FPM) with specific boundary conditions and excitation. The simulation results successfully capture complex phenomena free surface fluctuations, surging, rolling, breaking, along corresponding changes in center gravity induced by...

abstract: in this paper, optimization of boeing 747 wing has been accomplished for cruise condition (mach number=0.85, flight altitude=35000 ft), where an optimal wing shape is proposed. objective functions are minimization of wing weight and drag force that as well as confining design parameters, two functional constrains are applied. the first functional constrain is fuel tank volume in the a...

A dynamical system involving the decaying test of a partially filled liquid tank is analyzed in present paper. This analysis relevant for design aircraft fuel tanks, where wings' ...

Hydrogen internal combustion engine (ICE) vehicles present much of the same promise as hydrogen fuel cell vehicles (FCVs): reduced reliance on imported oil and reduced carbon dioxide emissions. Proponents envision hydrogen ICE as a bridging technology from gasoline vehicles to hydrogen FCVs. This paper examines the hydrogen ICE technology, focusing on relevant aspects such as power, fuel econom...

Feasibilities of heat and cold storage technologies for vehicles were discussed for improvement of vehicle fuel efficiency. Energy performance of a plug-in cold thermal energy storage system, in which ice slurry is produced at a stationary chiller and charged into a tank in a vehicle for cabin and cargo cooling, was discussed. Energy balance of the plug-in system was compared with onboard heat ...