Among the alternative fuels enabling energy transition, hydrogen-based transportation is a sustainable and efficient choice. It finds application both in light-duty heavy-duty mobility. However, hydrogen gas has unique qualities that must be taken into account when employed such vehicles: high-pressure levels up to 900 bar, storage composite tanks with temperature limit of 85 °C, negative Joule...

An interpretation of the Gough-Joule-Effect from an atomistic point of view is given by a special investigation of lattice vibrations using a non-interacting model. The calculations are restricted to crystals with ideal crystal structure built up of only one kind of particles. Approximate analytical formulas are derived. A comparison between the classical macroscopic theory and the here present...

The performance of Joule-Thomson (JT) cryocoolers can be improved by introducing ejectors. Ejectors with various geometric features have been proposed and investigated for cryogenic cooling in earlier studies, but only limited research is done on ejectors a nozzle throat diameter less than 1 mm. In this paper, we present miniature ejector 162 ?m that was measured using X-ray computed tomography...

Nowadays humans are facing difficult issues, such as increasing power costs, environmental pollution and global warming. In order to reduce their consequences, scientists concentrating on improving generators focused energy harvesting. Thermoelectric (TEGs) have demonstrated capacity transform thermal directly into electric through the Seebeck effect. Due unique advantages they present, thermoe...

The Joule–Thomson expansion is studied for Reissner–Nordström-Anti-de Sitter black holes with cloud of strings and quintessence, as well its thermodynamics. cosmological constant treated thermodynamic pressure, whose conjugate variable considered the volume. characteristics are in four main aspects case ω=−1 ω=−23, including coefficient, inversion curves, isenthalpic curves ratio between minimu...

or non-reacting gas mixtures, thus enabling values of (for such mixtures T to be used to guide the equation of state theory for mixtures. This is of interest, for a complete knowledge of the van der Waals forces in mixtures is of profound importance in the application of thermodynamics to chemical equilibria at finite pressures. I J. W. Gibbs, Scientific Papers, Vol. I, p. 87. 2 J. A. Beattie, ...

Acute obstruction of the central airways can occur due to foreign-body inhalation, mucus plugs, or blood clots. Airway obstruction due to blood clots is clinically suspected in a patient with acute respiratory failure if the patient has hemoptysis. However, one third of patients with acute endobronchial obstruction due to blood clots may present without obvious hemoptysis.1,2 Management involve...

Joule heating in single-walled carbon nanotubes CNTs using a quantum mechanical approach is presented in this paper. The modeling is based on the energy transfer between the electrons and both acoustic and optical phonons. In this formulation, only the knowledge of the full energy dispersion relation, phonon dispersion relation, and the electron-phonon coupling potential is required for the cal...

SPICA, a Japanese led mission, is part of the JAXA future science program and is planned for launch in 2018. SPICA will perform imaging and spectroscopic observations in the 5 to 210 mm waveband. The SPICA payload features three instruments, one of which, SAFARI, is developed by a European based consortium. SPICA’s distinctive feature is to use an actively cooled telescope down to 4 K. In addit...