Abstract: This invention relates to an absorption type heat exchanging apparatus having an evaporation unit, an absorption unit, a condensation unit and a regeneration unit. A diluted absorption liquid transfer pipe and a concentrated absorption liquid transfer pipe are installed between the absorption and regeneration units. A pump placed in one of these pipes is connected to a power take-off device which is placed in the other pipe and which is adapted to have rotative driving power imparted thereto by the absorption liquid in the pipe. Rotative driving power is imparted to the power take-off device by the energy based on the difference between the pressures in the regeneration and absorption units. This rotative driving power is transmitted to the pump. Thereby, the power to be provided to the pump from the outside is reduced.

Abstract: High-pressure gas generating apparatus includes a gas generator body provided with a combustion chamber. The gas generator body has a primary propellant injector including orifices for injecting a primary fuel and orifices for injecting a primary oxidizing agent, both the orifices being open to the combustion chamber, an igniter for igniting the primary fuel forced out from the injector, and valve means having a secondary fuel injecting orifice for injecting a metal fuel into a high-temperature gas atmosphere to be reacted therewith and containing a secondary oxidizing agent produced by the reaction of the primary fuel injected from the primary propellant injector with the primary oxidizing agent similarly injected.

Abstract: High-pressure gas generating apparatus includes a combustion chamber and a water jacket surrounding the combustion chamber. A metal fuel injecting nozzle is disposed in the center of one end of the combustion chamber. The water in the jacket is injected into the combustion chamber in the form of a swirling stream around the fuel injected from the nozzle.

Abstract: High-pressure gas generating apparatus includes a combustion engine and a metal fuel storage chamber surrounding the combustion chamber. The combustion chamber has at its one end a metal fuel injecting orifice and water injecting orifices. The fuel injecting orifice communicates with the fuel storage chamber, and the water injecting orifices communicate with a water heating tube extending helically in the interior of the combustion chamber.

Abstract: Method in which a metal fuel in the form of molten droplets is brought into contact with water for reaction. The fuel comprises aluminum as a primary fuel component and at least one of lithium, magnesium, sodium, potassium and sodium-potassium alloy as an auxiliary fuel component and is used in the form of an alloy or a mixture of these fuel components. When used in the form of an alloy, the fuel is preheated to a molten state and injected into a reactor under high pressure, whereby the fuel is made into droplets and contacted with water vapor introduced into the reactor from another system. For use as a mixture, the fuel is made into a slurry the liquid phase of which consists singly of the auxiliary fuel component, and the slurry is injected into an atmosphere containing water vapor.