Abstract: An external combustion engine suppressing boiling of cooling water in a cooler. A heater 12 uses waste heat of a heat engine 1 as a heat source to heat a working medium to make it evaporate. A cooler 13 uses cooling fluid cooling the heat engine 1 as a cooling source to cool steam of the working medium and make it condense. A heated part temperature reducing means is provided for reducing a temperature Th of the heated part 12a when the amount of heat radiated from the cooling fluid to the outside becomes smaller than the amount of heat transferred from the working medium to the cooling fluid. Due to this, it is possible to suppress the rise of the temperature Tw of the cooling fluid in the cooler 13, so it is possible to suppress boiling of the cooling water in the cooler 13.

Abstract: An external combustion engine formed with a plurality of heaters for improving output, provided with a container in which a working medium is sealed flowable in a liquid state, the container being formed with heaters for heating part of a working medium to generate vapor of the working medium and coolers for cooling the vapor to liquefy, the generation and liquefaction of the vapor causing the working medium to change in volume and the displacement of the liquid part of the working medium caused by the change in volume of the working medium being converted to mechanical energy for output, wherein at least the parts of the container connected with the heaters being branched into pluralities of tubular parts, a plurality of heaters are formed so as to be connected with the plurality of tubular parts, a plurality of vapor reservoirs for storing the vapor of the working medium are formed so as to be connected with the plurality of heaters, and the plurality of vapor reservoirs are connected with each other.

Abstract: A fluid pump enabling circulation of a working fluid in a Rankine cycle system etc. without utilizing electrical energy and able to be realized at a low cost, provided with a water pump for pumping up working fluid (water) from a steam condenser of the Rankine cycle system and feeding it to a boiler, a fluid vessel, a heater heating and vaporizing working fluid in the vessel, and a cooler cooling and liquefying the steam obtained by vaporization at the heater. Further, the fluid vessel is provided with a vibrator storing expansion energy by the expansion pressure of the steam heated by the heater. When the cooler causes the steam to condense and the pressure falls, the energy stored in the vibrator is used to feed working fluid to the heater 12 where the working fluid is then heated.

Abstract: An external combustion engine alternately repeating a first stroke of making a working fluid evaporate at a plurality of heating portions and making a liquid phase part of the working fluid displace toward an output part side and a second stroke of making the working fluid evaporated at the first stroke condense at the plurality of cooling portions and making the liquid phase part of the working fluid displace toward the side of the plurality of the heating portions and provided with inflow adjusting means for reducing differences in inflows among the plurality of the heating portions, wherein the inflow is defined as the amount of a liquid phase part of the working fluid flowing into the heating portions when the liquid phase part of the working fluid displaces from the output part side to the side of the plurality of the heating portions in the second stroke.

Abstract: A liquid pump for circulating working fluid (water) in a Rankine cycle comprises a U-shaped fluid vessel having a bending pipe portion and a pair of straight pipe portions, wherein a heating device and a cooling device are provided at one of the straight pipe portions for heating and cooling the water in the fluid vessel. The liquid pump further has a discharge pipe portion and an inlet pipe portion, and check valves are respectively provided in the discharge and inlet pipe portions. The water is vaporized by a heating operation of the heating device to increase pressure of the working fluid in the pump, so that the working fluid is discharged. The vaporized working fluid is then cooled down by the cooling device to decrease the pressure of the working fluid in the pump, so that the working fluid is sucked into the pump.

Abstract: An external combustion engine is disclosed, comprising a container (11) for sealing a working liquid (12) in a way adapted to allow the liquid to flow therein, a heater (13) for heating and vaporizing the working liquid (12) in the container (11), and a cooler (14) for cooling and liquefying the vapor of the working liquid (12) heated and vaporized by the heater (13). The displacement of the working liquid (12) caused by the volume change of the vapor of the working liquid (12) is output by being converted into mechanical energy. In the heated portion (11d) of the container (11) for vaporizing the working liquid (12), the direction of displacement of the working liquid (12) at the parts (17, 19) far from the cooler (14) is changed with respect to the direction of displacement at the part (16) near to the cooler (14).

Abstract: In a steam engine 1, an inner wall face 22a of a connecting tube portion 22 is entirely formed out of a water repellent finish face 22b. Accordingly, when liquid located in a portion close to a heater 30 in a vertical direction extending tube 12 is heated, boiled and liquefied, a liquid level of the liquid in the vertical direction extending tube 12 is pushed down from a top dead center Lu to a bottom dead center Lb. At this time, a quantity of liquid drops attached onto the inner wall face 22a of the connecting tube portion 22 can be reduced as compared with a case in which the entire inner wall face 22a of the connecting tube portion 22 is not formed out of a water repellent finish face 22b.

Abstract: An external combustion engine includes: a main container sealed with a working fluid in a liquid state adapted to flow; a heater for heating a portion of the working fluid in the main container and generating the vapor of the working fluid; a cooler for cooling and liquefying the vapor; an output unit for outputting by converting the displacement of the liquid portion of the working fluid generated by the volume change of the working fluid due to the generation and liquefaction of the vapor into mechanical energy; and an auxiliary container communicating with the main container. The heater, the cooler and the output unit are arranged in order, in the direction of displacement of the working fluid. The working fluid is sealed in the auxiliary container which communicates with the portion of the main container nearer the output unit than the cooler.

Abstract: A counter-stream-mode oscillating-flow heat transport apparatus improves heat transport capability by imparting oscillatory displacement to a fluid located near a heat-generating element such that the fluid is directed toward the heat-generating element. Turning portions of serpentine flow paths are disposed to face the heat-generating element. The flow paths are stacked in multiple layers in the direction from the heat-generating element to the flow paths, and a plurality of flow paths are disposed adjacent to the heat-generating element in the direction of fluid oscillation.

Abstract: A steam engine has a pipe shaped fluid container, a heating and cooling devices respectively provided at a heating and cooling portions of the fluid container, and an output device connected to the fluid container, so that the output device is operated by the fluid pressure change in the fluid container, to generate an electric power. In such a steam engine, an inner radius “r1” of the cooling portion is made to almost equal to a depth “?1” of the thermal penetration, which is calculated by the following formula (1); ? 1 = 2 ? a 1 ? ( 1 ) wherein, “a1” is a heat diffusivity of the working fluid at its low pressure, and “?” is an angular frequency of the movement of the working fluid.

Abstract: An external combustion engine provided with a plurality of evaporators and stabilized in output and efficiency, that is, an engine provided with at least one main container, a plurality of evaporators heating the working medium to evaporate, condensers cooling the vapor of the working medium evaporated at the evaporators to make it condense, an output part communicated with the other end of the main container and converting displacement of a liquid part of the working medium occurring due to fluctuations in volume of the working medium accompanying evaporation and condensation of the working medium to mechanical energy for output, a single main container pressure adjusting means adjusting an internal pressure of the main container, and controlling means for controlling the main container pressure adjusting means based on a lowest temperature in the temperatures of the plurality of evaporators constituting a minimum evaporator temperature.

Abstract: An external combustion engine including a container 10 sealed with a working medium 14 in liquid phase adapted to flow, a multiplicity of evaporators 201 to 204 for heating and evaporating part of the liquid-phase working medium 14, a multiplicity of condensers 221 to 224 for cooling and condensing the working medium 14 evaporated in the evaporators 201 to 204, and an output unit 11 for outputting by converting the displacement of the liquid-phase portion of the working medium 14 into mechanical energy. The multiplicity of the evaporators 201 to 204 share a heat source from which heat is supplied thereto.

Abstract: An external combustion engine 10 is disclosed, wherein a container 11 sealed with a working medium adapted to flow in a liquid state includes a heating unit 13 for generating a vapor of the working medium 12 by heating part of the working medium, and a cooling unit 14 for liquefying by cooling the vapor. The volume of the working medium 12 is changed by the generation and liquefaction of the vapor, and the displacement of the liquid portion of the working medium 12 caused by the volume change of the working medium 12 is converted into and output as mechanical energy. The heating unit 13 is structured so that inner members 51a, 53a arranged on the inside and outer members 51b, 53b arranged on the outside are bonded to each other. The outer members 51b, 53b are made of a second material higher in heat resistance than the first material of the inner members 51a, 53a. Further, the thickness of the inner members 51a, 53a is not smaller than the thermal penetration depth ? of the first material.

Abstract: A steam engine has a pipe shaped fluid container, a heating and cooling devices respectively provided at a heating and cooling portions of the fluid container, and an output device connected to the fluid container, so that the output device is operated by the fluid pressure change in the fluid container, to generate an electric power. In such a steam engine, an inner radius “r1” of the cooling portion is made to almost equal to a depth “?1” of thermal penetration, which is calculated by the following formula (1); ? 1 = 2 ? a 1 ? ( 1 ) wherein, “a1” is a heat diffusivity of the working fluid at its low pressure, and “?” is an angular frequency of the movement of the working fluid.

Abstract: A steam engine has a pipe shaped fluid container, a heating and cooling devices respectively provided at a heating and cooling portions of the fluid container, and an output device connected to the fluid container, so that the output device is operated by the fluid pressure change in the fluid container, to generate an electric power. In such a steam engine, the fluid pressure in the fluid container is adjusted such that the fluid pressure does not exceed a saturated vapor pressure at the operating temperature. As a result, unnecessary condensation and liquefaction of the steam due to the increased pressure higher than the saturated vapor pressure can be prevented, to improve performance of the steam engine.

Abstract: An external combustion engine formed with a plurality of heaters for improving output, provided with a container in which a working medium is sealed flowable in a liquid state, the container being formed with heaters for heating part of a working medium to generate vapor of the working medium and coolers for cooling the vapor to liquefy, the generation and liquefaction of the vapor causing the working medium to change in volume and the displacement of the liquid part of the working medium caused by the change in volume of the working medium being converted to mechanical energy for output, wherein at least the parts of the container connected with the heaters being branched into pluralities of tubular parts, a plurality of heaters are formed so as to be connected with the plurality of tubular parts, a plurality of vapor reservoirs for storing the vapor of the working medium are formed so as to be connected with the plurality of heaters, and the plurality of vapor reservoirs are connected with each other.

Abstract: An external combustion engine comprising a container (11) sealed with a working liquid (12) in a way adapted to allow the liquid to flow therein, a heating unit (13, 30) for heating and vaporizing the working liquid (12) in the container (11), and a cooling unit (14) for cooling and liquefying the vapor of the working liquid (12) heated and vaporized by the heating unit (13, 30) is disclosed, wherein the displacement of the working liquid (12) caused by the volume change of the vapor is output by being converted into mechanical energy. A pressure regulating unit (16, 60, 63) regulates the internal pressure (Pc) of the container (11). A control unit (21) controls the pressure regulating unit (16, 60, 63) based on at least the temperature (T1) of the heated portion (11a) of the container (11) for vaporizing the working liquid (12). The control unit (21) calculates the temperature (T1) based on at least the heat quantity (Q) applied from the heating unit (13 30) to the working liquid (12).

Abstract: An external combustion engine comprises a container (11) with a working liquid (12) sealed therein in a state adapted to flow, a heater (13) for heating and vaporizing the working liquid (12) in the container (11), and a cooler (14) for cooling and liquefying the vapor of the working liquid (12) heated and vaporized by the heater (13). The displacement of the working liquid (12) caused by the vapor volume change is output as mechanical energy by being converted into the mechanical energy. A pressure regulating liquid (18) is sealed in a pressure regulating container (16) communicating with the container (11). A pressure regulating unit (19) regulates the internal pressure (Pt) of the pressure regulating container (16).

Abstract: In a steam engine 1, an inner wall face 22a of a connecting tube portion 22 is entirely formed out of a water repellent finish face 22b. Accordingly, when liquid located in a portion close to a heater 30 in a vertical direction extending tube 12 is heated, boiled and liquefied, a liquid level of the liquid in the vertical direction extending tube 12 is pushed down from a top dead center Lu to a bottom dead center Lb. At this time, a quantity of liquid drops attached onto the inner wall face 22a of the connecting tube portion 22 can be reduced as compared with a case in which the entire inner wall face 22a of the connecting tube portion 22 is not formed out of a water repellent finish face 22b.

Abstract: An external combustion engine is disclosed, comprising a container (11) for sealing a working liquid (12) in a way adapted to allow the liquid to flow therein, a heater (13) for heating and vaporizing the working liquid (12) in the container (11), and a cooler (14) for cooling and liquefying the vapor of the working liquid (12) heated and vaporized by the heater (13). The displacement of the working liquid (12) caused by the volume change of the vapor of the working liquid (12) is output by being converted into mechanical energy. In the heated portion (11d) of the container (11) for vaporizing the working liquid (12), the direction of displacement of the working liquid (12) at the parts (17, 19) far from the cooler (14) is changed with respect to the direction of displacement at the part (16) near to the cooler (14).