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Composite Membranes for Medium-Temperature PEM Fuel Cells
Annual Review of Materials Research, 2003▪ Abstract The main obstacles to greater commercialization of polymer electrolyte fuel cells are mostly related to the low-proton conductivity at low-relative humidity of the known ionomeric membranes, to their high methanol permeability and poor mechanical properties above ∼130°C.
ALBERTI, Giulio, CASCIOLA, Mario
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Temperature of interstellar warm ionized medium
Astrophysics and Space Science, 2012This investigation on the temperature of the interstellar warm ionized medium (WIM) is characterized by the number and energy balance of the constituents of the WIM complex plasma viz. H plasma (electrons/ions/neutral atoms) and graphite dust, having a size distribution, characterized by the MRN (Mathis, Rumpl and Nordsieck) power law.
Sanjay K. Mishra +2 more
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Temperature Green Function for a Cylindrically Anisotropic Medium
ZAMM, 1998Summary: The two- and three-dimensional temperature Green functions for a cylindrically anisotropic medium are obtained in a closed form. These Green functions would be useful for thermoelastic BEM and FEM analysis of the cylindrically orthotropic composite materials.
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Sensible Heat Storage for Medium and High Temperatures
2008Storage systems using sensible heat storage have been developed for operation temperatures up to 400°C. These systems are intended for integration into solarthermal power plants demanding storage capacities in the MWh-range. Research has been focused on the development of cost effective storage systems using concrete with embedded heat exchangers ...
Laing, Doerte +2 more
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Brownian motion in a medium with inhomogeneous temperature
Physica A: Statistical Mechanics and its Applications, 1989Abstract We consider the motion of a Brownian particle in a medium with inhomogeneous temperature in the presence of an external potential. We start from the Klein-Kramers equation; in this equation a thermophoretic force, proportional to the temperature gradient, should in general be included to obtain a correct description of thermodiffusion ...
M.E. Widder, U.M. Titulaer
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Medium-temperature fumarolic gas sampling
Bulletin Volcanologique, 1981In order to sample medium-temperature fumaroles, gases are collected by means of iron or glass tubings and conveyed to the condensation system through glass dewar tubes. One type of condenser was designed for condensate measurement and gas sampling for Radon activity determination; the other, with NaOH absorbing solution, for the S/Cl ratio measurement
R. Cioni, E. Corazza
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Decomposition of nitrous oxide at medium temperatures
Combustion and Flame, 2000Flow reactor experiments were done to study the decomposition of N{sub 2}O at atmospheric pressure and in a temperature range of 600--1,000 C. Dilute mixtures of N{sub 2}O with H{sub 2}, CH{sub 4}, CO with and without oxygen with N{sub 2} as carrier gas were studied.
Gerhard Löffler +3 more
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Medium Temperature Deformation of Al Alloys
1998A strong demand is arising for medium temperature (100°–250°C) resistant aluminium alloys, issued mainly from the aeronautical and from the automotive industries. As far as the aeronautical industry is concerned, it is mainly related to the future Supersonic Civil Transport (SCT) aircraft: in the European project, very stringent technical requirements ...
G. Lapasset, P. Costa
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Penetration of Temperature Waves in a Random Medium
Journal of Mathematics and Physics, 1967Chen, Y. M., Tien, C. L.
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Measurement of the Flow and Temperature of a Compressed Medium
1968When designing rheometers, it is first necessary to choose a means of measuring the level of a liquid under pressure in the column of the rheometer. This can be done by one of the methods previously described. Secondly, the capillaries must be properly selected.
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