TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Component: The energy system also includes a heat exchanger (14) for controlling temperature in the heat transfer circuit; auxiliary heater for heating the chemical hydride solution in the heat transfer circuit; second pump in the heat transfer circuit for circulating the chemical hydride solution; temperature transducer in the heat transfer circuit and connected to the second pump for controlling the second pump; gas and liquid separator (16) in the first circuit between the reactor and the storage tank for separating generated hydrogen from the chemical hydride solution; a hydrogen vent connected through a valve to the hydrogen outlet to the fuel cell stack; aerosol filter in the first connection for filtering aerosol particles out of the hydrogen flow upstream from the fuel cell stack; a first level switch on the separator for the level of chemical hydride solution in the separator and a level control valve connected between the separator and the storage tank and to the first level switch; second level switch on the storage tank and connected to the first pump for controlling the pump; pressure transducer connected to the separator for monitoring the pressure of generated hydrogen; and pressure controller connected to the pressure transducer and to the first pump means for controlling the first pump and the pressure of generated hydrogen.The heat exchanger includes a fan for forcing cooling air through the heat exchanger to effect heat transfer.The temperature transducer is further connected to the fan for actuating the fan in dependence upon the sensed temperature.The second connection(s) is in the first circuit upstream of the reactor.The separator includes an outlet for hydrogen.The first connection is provided between the outlet for hydrogen and the fuel cell stack.The fuel cell stack includes a hydrogen inlet and a hydrogen outlet.The liquid-gas separator is connected to the hydrogen outlet for separating water from exhausted hydrogen. A return line is between the hydrogen outlet and the chemical hydride storage tank for supplying separated water to the chemical hydride solution. A recirculation duct is connected between the liquid-gas separator and the hydrogen inlet of the fuel cell stack. A third pump is in the recirculation duct for recirculating the separated hydrogen from the hydrogen outlet to the hydrogen inlet of the fuel cell stack.The hydrogen vent is connected to a catalytic burner provided with an inlet for an oxidant for consuming excess and vented hydrogen.The fuel cell stack includes an oxidant inlet and an oxidant outlet. A fourth oxygen pump is in the oxidant inlet line. An oxidant exhaust line is connected to the oxidant outlet. An enthalpy exchange device is between the oxidant inlet line and the oxidant exhaust line for transfer of enthalpy between an incoming oxidant stream and an exhaust oxidant stream.The level control valve is actuated to maintain a desired level of the chemical hydride solution within the separator.The fuel cell stack comprises a fuel cell stack including individual fuel cells, in which coolant ducts are provided between the fuel cells and connected in the heat transfer circuit.