Underground hydrogen storage has been recognized as a key technology for storing enormous amounts of hydrogen, thus aiding in the industrial-scale application economy. However, underground is only poorly understood, which leads to high project risk. This research examined effect caprock availability and injection rate on recovery factor leakage address some fundamental questions related storage...

Geological sequestration of CO2 on a massive scale implies that large area fractions of the underground could become flooded by CO2, imposing a unprecedented regulatory challenge to environmental authorities. Therefore we propose carbon sequestration bonds as complementary, market-based instruments that should further help to manage the risk of decadal-scale CO2 leakage. Such bond schemes addre...

The MV/LV transformer without a tank in the underground substation can produce remarkable interference with the computer Cathode-Ray Tube (CRT) displayers above the ground, because of the generated power frequency magnetic field. To resolve such problem, a tank with high conductivity or/and high permeability is needed to enclose the transformer. To evaluate the shielding effectiveness, the fini...

The leakage prediction calculation method for dynamic seal rings in underground equipment is presented this paper. framework of the given. model built. non-Newtonian fluid interface element brought in. was developed based on thermal–structural coupled and fluid–structural method. A test performed to validate proposed It proved that film thickness an O-ring made nitrile rubber pulling-in travel ...

Using CFD, the paper deals with a simulation of all phenomena related to forced-air duct fitted fan, emphasis on unit aerodynamic resistance and untight air ducts. We created 3-dimentional model system including perforations simulating untightens in order make computation network. Boundary conditions were set calculations made ANSYS Fluent 19.1 programme. The computational results assessed usin...