NOVELTY - A chemical hydride hydrogen generation system has a storage unit (5) for storing chemical hydride solution containing chemical hydride solute in a solvent, a reactor (20), a supplying device and a delivery unit for delivering additional solvent to chemical hydride solution as chemical hydride is consumed. The reactor contains a catalyst which catalyzes reaction of chemical hydride to generate hydrogen.    USE - Used in energy system (claimed).    ADVANTAGE - The clean chemical hydride hydrogen generation system has high efficiency. Since the hydrogen is generated at low pressure in the hydrogen generation system, the hydrogen generation system has high safety. Since the reaction products produced in the system are harmless detergent base chemicals, the system is ecofriendly. Since the system uses the novel chemical borohydride solution, the system is operated at low temperature such as -22 degreesC. Since the system has a pressure control unit, the system follows the load of a fuel cell stalk and meets peak performance requirements. Since the water in the fuel cell exhaust is removed, recycled and introduced into the chemical hydride solution, the system has improved energy densities of 1.2 KWh/L and 0.8 KWh/kg. Hydrogen recycled through a filtration system provides higher efficiency to the system and increased chemical hydride energy density.    DETAILED DESCRIPTION - A chemical hydride hydrogen generation system has a storage unit (5) for storing a chemical hydride solution containing chemical hydride solute in a solvent, a reactor (20), a supplying device and a delivery unit for delivering additional solvent to the chemical hydride solution as chemical hydride is consumed. The reactor contains a catalyst which catalyzes reaction of chemical hydride to generate hydrogen. The supplying device is connected between the storage device and the reactor and supplies the chemical hydride solution from the storage device to the reactor so that the chemical hydride solution reacts to generate hydrogen in the presence of the catalyst.    INDEPENDENT CLAIMS are included for the following:    (1) an energy system which has a fuel cell for generating electricity and water from hydrogen and an oxidant, the chemical hydride hydrogen generation system, a connection between reactor and fuel cell for supplying hydrogen to the fuel cell and a recovery unit, which recovers the water generated in the fuel cell and supplies the recovered water to the chemical hydride solution during the reaction as the chemical hydride solution is consumed; and    (2) generation and supply of hydrogen to a fuel cell, comprising: d.    (a) providing a supply of a solution containing a solvent and chemical hydride dissolved in the solvent;    (b) when hydrogen is required, supplying the solution is to a reactor containing a catalyst to catalyze reaction of the chemical hydride to generate hydrogen;    (c) delivering generated hydrogen to a fuel cell;    (d) recovering water from consumption of hydrogen in the fuel cell; and    (e) supplying the recovered water to the solution to compensate for water consumed during reaction of hydride to generate hydrogen and to promote maintenance of concentration levels for products of the reaction generating hydrogen at desirable levels, thus delaying precipitation of products which limits generation of hydrogen.    DESCRIPTION OF DRAWING(S) - The figure shows the chemical hydride hydrogen generation system.    Storage unit (5)    Reactor (20)