Compressed gaseous hydrogen

It is noted that all the candidate compressors mentioned earlier are costly in capital, energy, and operations and maintenance (O M). Advances have centered on the optimization of subsystems for cost reduction and improvement of the energy efficiency of gaseous hydrogen compression. Centrifugal compression and electrochemical hydrogen... 

The pressure at the outlet of the pressure-swing adsorption (PSA) plant is 1.5 MPa. The specific electricity requirement for the compression from 1.5 to 88 MPa at the compressed gaseous hydrogen (CGH2) filling station (required for 70 MPa on-board vehicle storage) amounts to about 0.077 MJei/MJ of CGH2. 

Compressed-air energy storage Corporate average fuel economy California Air Resources Board Coal-bed methane Combined cycle gas turbine Carbon/carbon dioxide capture and storage Clean development mechanism Chlorofluorocarbon Computable general equilibrium Compressed gaseous hydrogen Combined heat and power... 

The book is doubly ambitious in attempting to point the way to the hydrogen mine or source of low-cost hydrogen. Moreover it highlights the difference between compressible gaseous fuels and relatively incompressible liquid fuels for fuel cells. 

The transport of hydrogen in the form of chemical compounds would seem to reduce losses as well as costs, relative to transport of liquid hydrogen or the in any case likely to be too bulky compressed gaseous hydrogen. 

As shown in Figure 1, hydrogen can be delivered for use at a refueling station in several ways. It can be piped to the station via a pipeline, delivered in cryogenic liquid form and then vaporized, delivered in compressed gaseous form and stored in on-site tanks, generated on-site via reforming of hydrocarbon feedstocks such as natural gas, or... 

J2572. Recommended Praetiee for Measuring the Exhaust Emissions, Energy Consumption and Range of Fuel Cell Powered Eleetrie Vehicles Using Compressed Gaseous Hydrogen (draft)... 

These variables are used to determine costs associated with hydrogen compression for both types of gaseous storage using a multistage compressor. The energy required (kW) for isothermal compression is a function of the production rate as well as the inlet and outlet pressures... 

Fig. 10.5 Greenhouse gas intensity of different hydrogen productirai methods CGH compressed gaseous hydrogen, EL electrolysis, SOT solar thermal energy, HVDC high voltage direct current, AER absorption enhanced reforming. Source LBST/FhG-IWES/Hessen Agentur [10]...

CGH2 compressed gaseous hydrogen, 35-70 MPa and room temperature... 

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