WO2001009556A2 - Energy converting apparatus using vertical impulse wave, method thereof and air-conditioning system - Google Patents

Energy converting apparatus using vertical impulse wave, method thereof and air-conditioning system Download PDF

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Publication number
WO2001009556A2
WO2001009556A2 PCT/KR2000/000837 KR0000837W WO0109556A2 WO 2001009556 A2 WO2001009556 A2 WO 2001009556A2 KR 0000837 W KR0000837 W KR 0000837W WO 0109556 A2 WO0109556 A2 WO 0109556A2
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WO
WIPO (PCT)
Prior art keywords
fluid
energy
nozzle
converting
rotating force
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Application number
PCT/KR2000/000837
Other languages
French (fr)
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WO2001009556A3 (en
Inventor
Woo Hyun Han
Eun Hee Kyeun
Original Assignee
Woo Hyun Han
Eun Hee Kyeun
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Woo Hyun Han, Eun Hee Kyeun filed Critical Woo Hyun Han
Priority to AU61870/00A priority Critical patent/AU6187000A/en
Priority to KR10-2001-7004064A priority patent/KR100504764B1/en
Publication of WO2001009556A2 publication Critical patent/WO2001009556A2/en
Publication of WO2001009556A3 publication Critical patent/WO2001009556A3/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/02Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using Joule-Thompson effect; using vortex effect
    • F25B9/04Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using Joule-Thompson effect; using vortex effect using vortex effect
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/004Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being air

Definitions

  • the present invention relates to an energy convertmq apparatus and method and an air-conditioning system using the same, and more particularly to a non-combustion, non-fuel and non-pollution (3N) air-conditioning system, in which a compressed fluid such as gas is forced to pass through a throat of a convergmg-divergmg nozzle, thereby generating vertical impulse waves and thus converting kinetic energy of the compressed fluid into thermal energy to then perform heat exchange, or is forced to pass through a throat of a nozzle under the condition that vertical impulse waves are not generated, thereby rapidly expanding the compressed fluid and thus lowering the temperature of the fluid, to then generate cooling air or refrigerate water by heat exchange with the cooled fluid.
  • 3N non-combustion, non-fuel and non-pollution
  • Conventional energy converters the form of, for example, boilers, are configured to burn fuel such as natural gas, light oil, kerosene, flaming coal, or anthracite, thereby utilizing heat generated during the burning of the fuel, or to convert electrical energy into thermal energy by use of a heating coil.
  • fuel such as natural gas, light oil, kerosene, flaming coal, or anthracite
  • the conventional combustion system increases cost of fuel according to exhaustion of natural fuel resources, and raises a problem of a variety of pollution occurring due to the burning of fuel.
  • a heating cost is greatlv influenced by an increase in the fuel cost.
  • a facility cost for purifying an exhaust gas is added to thereby increase a production cost of a boiler apparatus.
  • an electric boiler is a non-combustion system, it is simple in comparison with a combustion type boiler ana does not generate an exhaust gas. However, the heating cost of the electric boiler is relatively higher than that of the combustion type boiler.
  • combustion type boiler and electric boiler are different individually from each other but the energy conversion efficiency of both boilers is 70-80- or so. Thus, it is not expected that the energy conversion efficiency be greatly increased unless there is change a fundamental energy conversion system.
  • an object of the invention is to provide a high efficiency energy converting apparatus and method of a non-combustion, non-fuel and non-pollution (3N) type and an air-conditioning system using the same, m which a compressed fluid such as gas is forced to pass through a throat of a convergmg-divergmg nozzle m a normal flow and lso-entropy flow fashion, thereby generating vertical impulse waves and thus converting kinetic energy of the compressed fluid into thermal energy to then perform heat exchange.
  • 3N non-combustion, non-fuel and non-pollution
  • Another object of the invention is to provide a high efficiency energy converting apparatus and method of a non-combustion, non-fuel and non-pollution (3N) type and an air-conditioning system using the same, m which a compressed fluid such as gas is forced to pass through a throat of a nozzle in a normal flow and iso-entropy flow fashion, under the condition that vertical impulse waves are not generated, thereby rapidly expanding the compressed fluid and thus lowering the temperature and pressure of the fluid, to then generate cooling air or refrigerate water by heat exchange with the cooled fluid.
  • Still another object of the invention is to provide a new conceptive air-conditioning system having a simple configuration capable of achieving an easy operation, being simply applicable m compact form, and being high efficient resulting m low maintenance fees.
  • an energy converting apparatus comprising: a rotating force generator for generating a rotating force in accordance with electrical energy applied thereto; compression means for compressing the mass of a fluid to a maximum compression degree in accordance with the rotating force applied thereto, thereby converting rotating energy corresponding to the rotating force into kinetic energy of the fluid; and impulse wave converting means for converting the kinetic energy of the fluid into thermal energy by forcing the compressed fluid to pass through a throat in a nozzle a normal flow and iso-entropy flow fashion, to accelerate and to generate vertical impulse waves.
  • the impulse wave converting means comprises a Laval nozzle having a first diameter portion whose inner circumference has the same diameter as that of an outlet of the compression means, a second diameter portion having a gradually decreasing diameter, a third portion having a gradually increasing diameter, and a fourth diameter portion having the same diameter as that of the first diameter portion, which are formed m succession.
  • a diameter ratio between the first and fourth diameter portions and the throat is set in such a manner that velocity of the compressed fluid having passed through a throat betweer the first and third diameter portions in the nozzle is accelerated at a velocity over Mach 1.5.
  • the energy converting apparatus further comprises a heating heat exchanger for conducting a heat exchange of the thermal energy with water, and circulating the resultant heated water through a heating conduit. Further, the energy converting apparatus comprises a heated water heat exchanger for conducting a heat exchange of the thermal energy with water, and discharging the resultant heated water through a heated water conduit . Still further, the energy converting apparatus comprises a heated air heat exchanger for conducting a heat exchange of the thermal energy with air, and discharging the resultant heated air through a heated air conduit.
  • an energy converting method comprising the steps of: applying electrical energy to an electric motor, thereby generating a rotating force; applying the rotating force to a compressor to compress the mass of a fluid tc a maximum compression degree, thereby converting the rotating energy corresponding to the rotating force into kinetic energy of the fluid; and forcing the compressed fluid to pass through a throat of a convergmg-divergmg nozzle, in a normal flow and iso-entropy flow fashion, to accelerate at a velocity over Mach 1.5 and to generate vertical impulse waves, thereby converting the kinetic energy of the fluid into thermal energy.
  • the energy converting method further comprises the steps of conducting a heat exchange with a heat transfer medium and supplying the heated heat transfer medium to a heating load.
  • an energy converting method comprising the steps of: applying electrical energy to an electric motor, thereby generating a rotating force; applying the rotating force to a compressor to compress the mass of a fluid to a maximum compression degree, thereby converting rotating energy corresponding to the rotating force into kinetic energy of the fluid; forcing the compressed fluid to pass through a throat of a convergmg-divergmg nozzle m a normal flow and iso-entropy flow fashion to accelerate at a velocity of the fluid between Mach 1 and Mach 1.5 and rapidly expand, thereby decreasing the temperature and pressure of the fluid, and cooling the fluid; and conducting a heat exchange using the cooled fluid, thereby cooling a heat transfer medium.
  • an air-conditioning system comprising: a rotating force generator for generating a rotating force m accordance with electrical energy applied thereto; compression means for compressing the mass of a fluid to a maximum compression degree in accordance with tie rotating force applied thereto, thereby converting rotating energ ⁇ corresponding to the rotating force into kinetic energy of the fluid; a heating convergmg-divergmg nozzle for forcing the compressed fluid to pass through a throat m the nozzle m a normal flow and iso-entropy flow fashion to accelerate at a velocity of the fluid over Mach 1.5 and generate vertical impulse waves, thereby converting the kinetic erergy of the fluid to thermal energy; a cooling convergmg-divergmg nozzle for forcing the compressed fluid to pass through a throat in the nozzle m a normal flow and iso-entropy flow fashion to accelerate at a velocity of the fluid between Mach 1 and Mach 1.5 and rapidly expand, thereby decreasing the temperature and pressure
  • an air-conditionmg system comprising: a rotating force generator for generating a rotating force accordance with electrical energy applied thereto; compression means for compressing the mass of a fluid to a maximum compression degree m accordance with the rotating force applied thereto, thereby converting rotating energy corresponding to the rotating force into kinetic energy of the fluid; a heating convergmg-divergmg nozzle for forcing the compressed fluid to pass through a throat in the nozzle m a normal flow and iso-entropy flow fashion to accelerate at a velocity of the fluid over Mach 1.5 and generate vertical impulse waves, thereby converting the kinetic energy of the fluid to thermal energy; a heating heat exchanger for conducting a heat exchange of the thermal energy with water and supplying the heated water through a heating conduit; and a heated water heat exchange
  • the fluid is one selected from the group consisting of air, N , Freon, and inert gas.
  • the present invention provides a high efficiency air-conditioning system of a non-combustion, non-fuel and non-pollution (3N) type, in which a compressed fluid such as gas is forced to pass through a throat of a convergmg-divergmg nozzle m a normal flow and iso-entropy flow fashion, thereby generating vertical impulse waves and thus converting kinetic energy of the fluid into thermal energy, or is forced to pass through a throat of a nozzle under the condition that vertical impulse waves are not generated, thereby rapidly expanding the fluid and thus .owennq the temperature and pressure of the fluid, to then generate cooling air or refrigerate cooling water by heat exchange with the cooled fluid.
  • 3N non-combustion, non-fuel and non-pollution
  • FIG.1 is a schematic block diagram illustrating an energy converting apparatus m accordance with the present invention
  • FIG. 2 is a sectional view showing the shape of a nozzle shown in FIG. 1;
  • FIG. 3 is a schematic view illustrating an air-conditioning system according to the present invention.
  • FIG. 4 is a schematic view illustrating an example that the present invention system is adapted to an air-conditioning system for domestic use. Best Mode for Carrying Out the Invention
  • FIG .1 is a schematic block diagram illustrating an energy converting apparatus in accordance with the present invention.
  • FIG. 2 is a sectional view showing the shape of a nozzle shown m FIG. 1.
  • the energy converting apparatus of thepresent invention includes amotor (M) 10 driven by electric power, a compressor 20 driven by a rotating force from the motor 10, for compressing fluid such as gas, a converging-diverging nozzle, namely aLaval nozzle 30 in which the fluid such as gas compressed in the compressor 20 is forced to pass through a throat of a converging-diverging nozzle in a normal flow and iso-entropy flow fashion, thereby generating vertical impulse waves and thus converting kinetic energy of the fluid into thermal energy, or is forced to pass through a throat in the nozzle under the condition that vertical impulse waves are not generated, thereby rapidly expanding the fluid and thus lowering the temperature and pressure of the fluid, and a heat exchanger 40 for conducting a heat exchange appropriate for each purpose using the heat exchanged fluid discharged from the nozzle 30.
  • M motor
  • a compressor 20 driven by a rotating force from the motor 10
  • a converging-diverging nozzle namely aLaval nozzle 30 in which the fluid such as
  • the energy conversion medium that is, the usable gas as a fluid is one among air, N 2 gas, Freon gas, and inert gas, which is not explosive but stable although being compressed at a high temperature and pressure.
  • air is the most preferable gas.
  • the compressor 20 that can be used for compressing the fluid s any one of a reciprocating compressor, a screw compressor, a turbo compressor, and a scroll compressor.
  • the reciprocating compressor has advantages in that a high compression pressure is obtained and that heat of a high temperature is obtained within a reduced oe ⁇ od of time, its application is limited. That is, since the reciprocating compressor exhibits a small amount of discharged air, and high variations in discharge amount and pressure while involving generation of noise and vibrations, it is unsuitable for domestic use, even though it is suitable for industrial use or in a case requiring a large capacity m which those problems can be accommodated to a degree.
  • the screw compressor is advantageous, as compared to the reciprocating compressor, in that the discharge amount and compression amount are constant and the discharge amount is relatively larger than that of the reciprocating compressor, and that there is no or little noise or vibrations generated, which is particularly appropriate for domestic use.
  • the convergmg-divergmg nozzle 30 includes a first diameter portion 31 having the same diameter as that of an outlet of the compressor 20, a second diameter portion 32 extending from the first diameter portion 31 while having a gradually decreasing diameter, a throat 33 forme ⁇ on the end of the second diameter portion 32, a third d ⁇ ameter portion 34 extending from the throat 33 while having a gradually increasing diameter, and a fourth diameter portion 35 havmq the same diameter as that of the first diameter portion 31.
  • the nozzle 30 is installed at a point sufficiently far from a required length of a discharge side of the compressor 20. By doing so, a maximum amount of fluid view of a mass of flu-.d can ideally flow at the throat 33 of the nozzle 30.
  • the value of volume or pressure up to the entrance ot the nozzle 30 has a static property due to the nozzle throat.
  • the length of the throat 33 is set in a manner that a maximum mass amount of flow is maintained at the throat 33. I aS, the throat 33 of the nozzle is choked. Therefore, the velocity of the fluid at the throat becomes Mach 1.
  • the convergmg-divergmg nozzle 30 can further include a re-divergmg orifice 36 for decreasing the velocity of the fluid and increasing the temperature and pressure at its rear end.
  • the convergmg-divergmg nozzle 30 does not generate vertical impulse waves in the case that the flow velocity of the fluid having passed through the throat 33 is accelerated at a velocity between Mach 1 and Mach 1.5, but generates vertical impulse waves in the case that the flow velocity of the fluid is accelerated at a velocity over Mach 1.5.
  • the nozzle 30 is designed to have a diameter ratio between the uniform diameter portion 31 and the throat 33 determined in a manner that the flow velocity of the fluid having passed through the throat 33 is set with a velocity between Mach 1 and Macn 1.5, m tns case that the heat exchanger 40 is used for cooling purpose.
  • the nozzle 30 is designed to have a diameter rat ⁇ o between the uniform diameter portion 31 and the throat 33 determined in a manner that the flow velocity of the fluid having passed through the throat 33 is set with a velocity over Mach 1.5, m the case that the heat exchanger 40 is used for heating purpose.
  • the nozzle 30 is used as a cool g nozzle 3 r d. m the case that the flow velocity of the fluid from the throat 33 is set with a velocity between Mach 1 and Mach 1.5, while the nozzle 30 is used as a heating nozzle 30b m the case that the flow velocity of the fluid is set with a velocity over Mach 1.5.
  • a cooling heat exchanger 41 connected to the cooling nozzle 30a as shown m FIG.3 includes a heat exchanging coil 41a through which a low temperature fluid discharge ⁇ from the nozzle 30a passes in order to generate cooled air, and a olower fan 51 for discharging the cooled air to the outside .
  • a heating heat exchanger 42 connected to the heating nozzle 30b includes a heat exchanging coil 42a through whicn a high temperature fluid discharged from the nozzle 30b passes m order to generate heated air, and a blower fan 52 for discharging the heated air to the outside.
  • a heated water heat exchanger 43 connected to the heating nozzle 30b includes a heat exchanging coil 43d through which a high temperature fluid discharged from t ⁇ e nozzle 30b passes m order to generate heate ⁇ water, and a pump 53 for discharging the heated water to the outside. In this case, the pump 53 can be stalledor omitted as necessary.
  • a heating heat exchanger 44 connected to the heating nozzle 30b includes a heat exchanging coil 44a through which a high temperature fluid discharged from the nozzle 30b passes m order to generate heated water, and a circulating pump 54 for circulating the heated water through a heatm ⁇ conduit 55.
  • the heated water or heating heat exchangers 43 and 44 can employ a plate type heat exchanger or a water tank type heat exchanger, respectively.
  • the plate type heat exchanger is small m comparison with the water tank type heat exchanger and performs an instant heat exchange, thereby reducing the size of the system and supplying the heated water or the heater water rapidly.
  • the cooling or heating fluid (air) discharged after conducting a heat exchange from the heat exchanging coiis 41a-44a is not completely heat-exchanged. Accordingly, the fluid from the heat exchanging coils can be supplied through a filter to an appropriate place or circulated to a compressor 20.
  • the compressed fluid discharged from the compressor 20 can be controlled by using control valves 61 and 62 m a manner that it can be selectively supplied to one of the cooling nozzle 30a and the heating nozzle 30b depending upon a decision that a user selects which one among the heat exchangers 41-44. Accordingly, any one of the heat exchangers 41-44 or more can be selected and operated.
  • a reference numeral 10 denotes a motor, 20 a screw compressor, 22 an air filter, 21 an oil separator, 30 a converging-diverging nozzle, 43 a heated water heat exchanger, 44 a heating heat exchanger , 54 a circulating pump, 55 a heating conduit, 70 an expansion tank and 72 a three-way valve.
  • the operation of the boiler system of FIG. 4 is substantially same as that of FIG. 3.
  • the oil separator 24 is used for separating compressed air and oil since the compressor 20 is a screw compressor using oil.
  • the expansion tank 70 absorbs an expansion of the circulating water m t ⁇ e heating conduit 55 caused by an overheating.
  • the three-way valve 72 switches the cool water of the normal temperature, that is, the tap water to one of the expansion tank 70 and the heated water heat exchanger 43.
  • the heated water can be used through the heated water heat exchanger 43, and the heating conduit 55 is heated by the operation of the heating heat exchanger 44 to thus achieve heating.
  • An indirect heating system of the present invention shown m FIG. 4 can obtain a high heat conversion efficiency corresponding to about 3.44 times that obtained m the conventional direct heating technique in which the heating water is directly heated using an electric heater.
  • the present invention can be applied to various heat exchangers in addition to the embodiments.
  • the heat exchanger according to the present invention can be applied to a vehicle ventilation system, a low-temperature warehouse cooling system, a medical rapid cooling apparatus, and so on.
  • the above embodiments have been described with respect to the case of the one-stage convergmg-divergmg nozzle.
  • the present invention is not limited thereto, but can adopt a two-stage convergmg-divergmg nozzle each stage being connected m series .
  • any nozzle can be used if it can suffice the condition that the fluid having passed through the throat of the nozzle can generate the vertical impulse waves.
  • the ratio between the large aperture of the nozzle and the diameter of the throat is determined according to a load connected to a heat exchanger, which is thus not limited to a particular value.
  • the cooling nozzle 30a and the heating nozzle 30b m the present invention can be constructed m a combination type as shown m FIG. 3 or m an individual type as shown in FIG. 4. Also, the cooling load or heating load, which is connected to the respective nozzles 30a and 30b, can use air or water as a heat transfer medium.
  • the two heat exchangers 43 and 44 as shown m FIG. 4 can be used for a combined use in a supply of heating and heated water.
  • the heating heat exchanger 42 for discharging heated air can be combined.
  • the present invention is not a combustion type heating system, it is possible to realize an air-conditioning system that performs cooling and heating with a simple structure and selectively according to a user selection.
  • the present invention can realize an air-conditioning system of a non-combustion, non-fuel and non-pollution (3N) type, with a simple structure, at a low cost, and in a compact fashion, which a compressed fluid such as gas is used to generate vertical impulse waves and thus convert high kinetic energy of the fluid into thermal energy, or is forced to pass through a throat of a nozz ⁇ e under the condition that vertical impulse waves are not generated, thereby rapidly expanding the compressed fluid and thus lowering the temperature of the fluid, to then generate cooling air or refrigerate water by heat exchange with the cooled fluid.
  • a compressed fluid such as gas

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Abstract

An air-conditioning system of a non-combustion, non-fuel and non-pollution (3N) type, using the same in which a compressed fluid such as gas is forced to pass through a throat of a converging-diverging nozzle, thereby generating vertical impulse waves and thus converting kinetic energy of the fluid into thermal energy to then perform heat exchange, or is forced to pass through a throat in a nozzle under the condition that vertical impulse waves are not generated, thereby rapidly expanding the fluid and thus lowering the temperature of the fluid, to then generate cooling air or refrigerate cooling water by heat exchange with the cooled fluid.

Description

ENERGY CONVERTING APPARATUS USING VERTICAL IMPULSE WAVE, METHOD THEREOF AND AIR-CONDITIONING SYSTEM
Technical Field The present invention relates to an energy convertmq apparatus and method and an air-conditioning system using the same, and more particularly to a non-combustion, non-fuel and non-pollution (3N) air-conditioning system, in which a compressed fluid such as gas is forced to pass through a throat of a convergmg-divergmg nozzle, thereby generating vertical impulse waves and thus converting kinetic energy of the compressed fluid into thermal energy to then perform heat exchange, or is forced to pass through a throat of a nozzle under the condition that vertical impulse waves are not generated, thereby rapidly expanding the compressed fluid and thus lowering the temperature of the fluid, to then generate cooling air or refrigerate water by heat exchange with the cooled fluid.
Background Art
Conventional energy converters the form of, for example, boilers, are configured to burn fuel such as natural gas, light oil, kerosene, flaming coal, or anthracite, thereby utilizing heat generated during the burning of the fuel, or to convert electrical energy into thermal energy by use of a heating coil.
The conventional combustion system increases cost of fuel according to exhaustion of natural fuel resources, and raises a problem of a variety of pollution occurring due to the burning of fuel. Thus, a heating cost is greatlv influenced by an increase in the fuel cost. A facility cost for purifying an exhaust gas is added to thereby increase a production cost of a boiler apparatus.
Since an electric boiler is a non-combustion system, it is simple in comparison with a combustion type boiler ana does not generate an exhaust gas. However, the heating cost of the electric boiler is relatively higher than that of the combustion type boiler.
Further, the above-described combustion type boiler and electric boiler are different individually from each other but the energy conversion efficiency of both boilers is 70-80- or so. Thus, it is not expected that the energy conversion efficiency be greatly increased unless there is change a fundamental energy conversion system.
Meanwhile, a system using an atomic energy, a tidal power or a solar energy is difficult to be commercialized individually or at a small-scale case since its initial facility investment cost is greatly large. Also, a system using a recycled oil or garbage is not so applicable since its facility cost for purifying an exhaust gas is large.
Thus, it is required that a new conceptive energy conversion method having an excellent energy conversion efficiency which is a non-combustion type as in an electric boiler and a heating system using the same be developed. Furthermore, since the conventional heating and cooling systems are remarkably different from each other, it is not so easily possible to incorporate the heating and coolmg systems into a single apparatus. Although the heating ard cooling systems is incorporated into a single apparatus, z " e cost thereof is very expensive and its energy conversion efficiency is low to thereby heighten its maintenance fees. Thus, it is difficult to distribute such a heating and cooling incorporation system for domestic use.
Disclosure of the Invention
Therefore, an object of the invention is to provide a high efficiency energy converting apparatus and method of a non-combustion, non-fuel and non-pollution (3N) type and an air-conditioning system using the same, m which a compressed fluid such as gas is forced to pass through a throat of a convergmg-divergmg nozzle m a normal flow and lso-entropy flow fashion, thereby generating vertical impulse waves and thus converting kinetic energy of the compressed fluid into thermal energy to then perform heat exchange.
Another object of the invention is to provide a high efficiency energy converting apparatus and method of a non-combustion, non-fuel and non-pollution (3N) type and an air-conditioning system using the same, m which a compressed fluid such as gas is forced to pass through a throat of a nozzle in a normal flow and iso-entropy flow fashion, under the condition that vertical impulse waves are not generated, thereby rapidly expanding the compressed fluid and thus lowering the temperature and pressure of the fluid, to then generate cooling air or refrigerate water by heat exchange with the cooled fluid. Still another object of the invention is to provide a new conceptive air-conditioning system having a simple configuration capable of achieving an easy operation, being simply applicable m compact form, and being high efficient resulting m low maintenance fees. According to a first aspect of the present invention, there is provided an energy converting apparatus comprising: a rotating force generator for generating a rotating force in accordance with electrical energy applied thereto; compression means for compressing the mass of a fluid to a maximum compression degree in accordance with the rotating force applied thereto, thereby converting rotating energy corresponding to the rotating force into kinetic energy of the fluid; and impulse wave converting means for converting the kinetic energy of the fluid into thermal energy by forcing the compressed fluid to pass through a throat in a nozzle a normal flow and iso-entropy flow fashion, to accelerate and to generate vertical impulse waves.
The impulse wave converting means comprises a Laval nozzle having a first diameter portion whose inner circumference has the same diameter as that of an outlet of the compression means, a second diameter portion having a gradually decreasing diameter, a third portion having a gradually increasing diameter, and a fourth diameter portion having the same diameter as that of the first diameter portion, which are formed m succession.
A diameter ratio between the first and fourth diameter portions and the throat is set in such a manner that velocity of the compressed fluid having passed through a throat betweer the first and third diameter portions in the nozzle is accelerated at a velocity over Mach 1.5.
The energy converting apparatus further comprises a heating heat exchanger for conducting a heat exchange of the thermal energy with water, and circulating the resultant heated water through a heating conduit. Further, the energy converting apparatus comprises a heated water heat exchanger for conducting a heat exchange of the thermal energy with water, and discharging the resultant heated water through a heated water conduit . Still further, the energy converting apparatus comprises a heated air heat exchanger for conducting a heat exchange of the thermal energy with air, and discharging the resultant heated air through a heated air conduit. According to a second aspect of the present invention, there s provided an energy converting method comprising the steps of: applying electrical energy to an electric motor, thereby generating a rotating force; applying the rotating force to a compressor to compress the mass of a fluid tc a maximum compression degree, thereby converting the rotating energy corresponding to the rotating force into kinetic energy of the fluid; and forcing the compressed fluid to pass through a throat of a convergmg-divergmg nozzle, in a normal flow and iso-entropy flow fashion, to accelerate at a velocity over Mach 1.5 and to generate vertical impulse waves, thereby converting the kinetic energy of the fluid into thermal energy. The energy converting method further comprises the steps of conducting a heat exchange with a heat transfer medium and supplying the heated heat transfer medium to a heating load.
According to a third aspect of the present invention, there is provided an energy converting method comprising the steps of: applying electrical energy to an electric motor, thereby generating a rotating force; applying the rotating force to a compressor to compress the mass of a fluid to a maximum compression degree, thereby converting rotating energy corresponding to the rotating force into kinetic energy of the fluid; forcing the compressed fluid to pass through a throat of a convergmg-divergmg nozzle m a normal flow and iso-entropy flow fashion to accelerate at a velocity of the fluid between Mach 1 and Mach 1.5 and rapidly expand, thereby decreasing the temperature and pressure of the fluid, and cooling the fluid; and conducting a heat exchange using the cooled fluid, thereby cooling a heat transfer medium.
According to a fourth aspect of the present invention, there is provided an air-conditioning system comprising: a rotating force generator for generating a rotating force m accordance with electrical energy applied thereto; compression means for compressing the mass of a fluid to a maximum compression degree in accordance with tie rotating force applied thereto, thereby converting rotating energ} corresponding to the rotating force into kinetic energy of the fluid; a heating convergmg-divergmg nozzle for forcing the compressed fluid to pass through a throat m the nozzle m a normal flow and iso-entropy flow fashion to accelerate at a velocity of the fluid over Mach 1.5 and generate vertical impulse waves, thereby converting the kinetic erergy of the fluid to thermal energy; a cooling convergmg-divergmg nozzle for forcing the compressed fluid to pass through a throat in the nozzle m a normal flow and iso-entropy flow fashion to accelerate at a velocity of the fluid between Mach 1 and Mach 1.5 and rapidly expand, thereby decreasing the temperature and pressure of the fluid, and cooling the fluid; a plurality of heating heat exchangers for conducting a heat exchange of the thermal energy with tne heat transfer medium and supplying the heated heat transfer medium to a heating load; and at least one cooling heat exchanger for conducting a heat exchange using the cooled fluid and supplying the cooled heat transfer medium to a cooling load.
In the air-conditioning system, the heat transfer medium for the heating heat exchanger is one of air and heating water, and the heat transfer medium for the cooling heat exchanger is one of air and cooling water. According to a fifth aspect of the present invention, there is provided an air-conditionmg system comprising: a rotating force generator for generating a rotating force accordance with electrical energy applied thereto; compression means for compressing the mass of a fluid to a maximum compression degree m accordance with the rotating force applied thereto, thereby converting rotating energy corresponding to the rotating force into kinetic energy of the fluid; a heating convergmg-divergmg nozzle for forcing the compressed fluid to pass through a throat in the nozzle m a normal flow and iso-entropy flow fashion to accelerate at a velocity of the fluid over Mach 1.5 and generate vertical impulse waves, thereby converting the kinetic energy of the fluid to thermal energy; a heating heat exchanger for conducting a heat exchange of the thermal energy with water and supplying the heated water through a heating conduit; and a heated water heat exchanger for conducting a heat exchange using the thermal energy with water and discharging the heated water .
The fluid is one selected from the group consisting of air, N , Freon, and inert gas.
As described above, the reason why an energy conversion efficiency is high in the present invention is based on the principle that it is difficult to convert thermal energy to work energy (low efficiency) but it is easy to convert work energy to thermal energy (high efficiency) . That is, the present invention provides a high efficiency air-conditioning system of a non-combustion, non-fuel and non-pollution (3N) type, in which a compressed fluid such as gas is forced to pass through a throat of a convergmg-divergmg nozzle m a normal flow and iso-entropy flow fashion, thereby generating vertical impulse waves and thus converting kinetic energy of the fluid into thermal energy, or is forced to pass through a throat of a nozzle under the condition that vertical impulse waves are not generated, thereby rapidly expanding the fluid and thus .owennq the temperature and pressure of the fluid, to then generate cooling air or refrigerate cooling water by heat exchange with the cooled fluid.
Brief Description of the Drawings
Other objects and aspects of the invention will become apparent from the following description of embodiments with reference to the accompanying drawings m which: FIG.1 is a schematic block diagram illustrating an energy converting apparatus m accordance with the present invention;
FIG. 2 is a sectional view showing the shape of a nozzle shown in FIG. 1; FIG. 3 is a schematic view illustrating an air-conditioning system according to the present invention; and
FIG. 4 is a schematic view illustrating an example that the present invention system is adapted to an air-conditioning system for domestic use. Best Mode for Carrying Out the Invention
Preferred embodiments of the present invention will oe described below with reference to the accompanying drawings.
FIG .1 is a schematic block diagram illustrating an energy converting apparatus in accordance with the present invention. FIG. 2 is a sectional view showing the shape of a nozzle shown m FIG. 1.
As shown in FIG. 1, the energy converting apparatus of thepresent invention includes amotor (M) 10 driven by electric power, a compressor 20 driven by a rotating force from the motor 10, for compressing fluid such as gas, a converging-diverging nozzle, namely aLaval nozzle 30 in which the fluid such as gas compressed in the compressor 20 is forced to pass through a throat of a converging-diverging nozzle in a normal flow and iso-entropy flow fashion, thereby generating vertical impulse waves and thus converting kinetic energy of the fluid into thermal energy, or is forced to pass through a throat in the nozzle under the condition that vertical impulse waves are not generated, thereby rapidly expanding the fluid and thus lowering the temperature and pressure of the fluid, and a heat exchanger 40 for conducting a heat exchange appropriate for each purpose using the heat exchanged fluid discharged from the nozzle 30.
The energy conversion medium, that is, the usable gas as a fluid is one among air, N2 gas, Freon gas, and inert gas, which is not explosive but stable although being compressed at a high temperature and pressure. For example, air is the most preferable gas.
The compressor 20 that can be used for compressing the fluid s any one of a reciprocating compressor, a screw compressor, a turbo compressor, and a scroll compressor. Although the reciprocating compressor has advantages in that a high compression pressure is obtained and that heat of a high temperature is obtained within a reduced oeπod of time, its application is limited. That is, since the reciprocating compressor exhibits a small amount of discharged air, and high variations in discharge amount and pressure while involving generation of noise and vibrations, it is unsuitable for domestic use, even though it is suitable for industrial use or in a case requiring a large capacity m which those problems can be accommodated to a degree. Meanwhile, the screw compressor is advantageous, as compared to the reciprocating compressor, in that the discharge amount and compression amount are constant and the discharge amount is relatively larger than that of the reciprocating compressor, and that there is no or little noise or vibrations generated, which is particularly appropriate for domestic use.
As shown in FIG. 2, the convergmg-divergmg nozzle 30 includes a first diameter portion 31 having the same diameter as that of an outlet of the compressor 20, a second diameter portion 32 extending from the first diameter portion 31 while having a gradually decreasing diameter, a throat 33 formeα on the end of the second diameter portion 32, a third d±ameter portion 34 extending from the throat 33 while having a gradually increasing diameter, and a fourth diameter portion 35 havmq the same diameter as that of the first diameter portion 31. The nozzle 30 is installed at a point sufficiently far from a required length of a discharge side of the compressor 20. By doing so, a maximum amount of fluid view of a mass of flu-.d can ideally flow at the throat 33 of the nozzle 30. The value of volume or pressure up to the entrance ot the nozzle 30 has a static property due to the nozzle throat. The length of the throat 33 is set in a manner that a maximum mass amount of flow is maintained at the throat 33. I aS, the throat 33 of the nozzle is choked. Therefore, the velocity of the fluid at the throat becomes Mach 1.
Preferably, the convergmg-divergmg nozzle 30 can further include a re-divergmg orifice 36 for decreasing the velocity of the fluid and increasing the temperature and pressure at its rear end.
The convergmg-divergmg nozzle 30 does not generate vertical impulse waves in the case that the flow velocity of the fluid having passed through the throat 33 is accelerated at a velocity between Mach 1 and Mach 1.5, but generates vertical impulse waves in the case that the flow velocity of the fluid is accelerated at a velocity over Mach 1.5.
Thus, as shown in FIG. 3, the nozzle 30 is designed to have a diameter ratio between the uniform diameter portion 31 and the throat 33 determined in a manner that the flow velocity of the fluid having passed through the throat 33 is set with a velocity between Mach 1 and Macn 1.5, m tns case that the heat exchanger 40 is used for cooling purpose. Meanwhile, the nozzle 30 is designed to have a diameter rat^o between the uniform diameter portion 31 and the throat 33 determined in a manner that the flow velocity of the fluid having passed through the throat 33 is set with a velocity over Mach 1.5, m the case that the heat exchanger 40 is used for heating purpose.
That is, the nozzle 30 is used as a cool g nozzle 3 r d. m the case that the flow velocity of the fluid from the throat 33 is set with a velocity between Mach 1 and Mach 1.5, while the nozzle 30 is used as a heating nozzle 30b m the case that the flow velocity of the fluid is set with a velocity over Mach 1.5.
Meanwhile, a cooling heat exchanger 41 connected to the cooling nozzle 30a as shown m FIG.3 includes a heat exchanging coil 41a through which a low temperature fluid dischargeα from the nozzle 30a passes in order to generate cooled air, and a olower fan 51 for discharging the cooled air to the outside . Also, a heating heat exchanger 42 connected to the heating nozzle 30b includes a heat exchanging coil 42a through whicn a high temperature fluid discharged from the nozzle 30b passes m order to generate heated air, and a blower fan 52 for discharging the heated air to the outside. Further, a heated water heat exchanger 43 connected to the heating nozzle 30b includes a heat exchanging coil 43d through which a high temperature fluid discharged from tπe nozzle 30b passes m order to generate heateα water, and a pump 53 for discharging the heated water to the outside. In this case, the pump 53 can be stalledor omitted as necessary. Further, a heating heat exchanger 44 connected to the heating nozzle 30b includes a heat exchanging coil 44a through which a high temperature fluid discharged from the nozzle 30b passes m order to generate heated water, and a circulating pump 54 for circulating the heated water through a heatmα conduit 55. The heated water or heating heat exchangers 43 and 44 can employ a plate type heat exchanger or a water tank type heat exchanger, respectively. The plate type heat exchanger is small m comparison with the water tank type heat exchanger and performs an instant heat exchange, thereby reducing the size of the system and supplying the heated water or the heater water rapidly.
Also, the cooling or heating fluid (air) discharged after conducting a heat exchange from the heat exchanging coiis 41a-44a is not completely heat-exchanged. Accordingly, the fluid from the heat exchanging coils can be supplied through a filter to an appropriate place or circulated to a compressor 20.
The compressed fluid discharged from the compressor 20 can be controlled by using control valves 61 and 62 m a manner that it can be selectively supplied to one of the cooling nozzle 30a and the heating nozzle 30b depending upon a decision that a user selects which one among the heat exchangers 41-44. Accordingly, any one of the heat exchangers 41-44 or more can be selected and operated.
FIG. 4 is a schematic view illustrating a boiler system including a heating and heated water incorporated heat exchanger for heating a 100 pyong (1 pyong = 3.954 sq. yds.' house .
In FIG. 4, the identical elements to those of FIG. 3 are assigned with the identical reference numerals as those of FIG. 3. A reference numeral 10 denotes a motor, 20 a screw compressor, 22 an air filter, 21 an oil separator, 30 a converging-diverging nozzle, 43 a heated water heat exchanger, 44 a heating heat exchanger , 54 a circulating pump, 55 a heating conduit, 70 an expansion tank and 72 a three-way valve.
The operation of the boiler system of FIG. 4 is substantially same as that of FIG. 3. The oil separator 24 is used for separating compressed air and oil since the compressor 20 is a screw compressor using oil. The expansion tank 70 absorbs an expansion of the circulating water m t^e heating conduit 55 caused by an overheating. The three-way valve 72 switches the cool water of the normal temperature, that is, the tap water to one of the expansion tank 70 and the heated water heat exchanger 43.
Thus, the heated water can be used through the heated water heat exchanger 43, and the heating conduit 55 is heated by the operation of the heating heat exchanger 44 to thus achieve heating.
An indirect heating system of the present invention shown m FIG. 4 can obtain a high heat conversion efficiency corresponding to about 3.44 times that obtained m the conventional direct heating technique in which the heating water is directly heated using an electric heater. The present invention can be applied to various heat exchangers in addition to the embodiments. For example, the heat exchanger according to the present invention can be applied to a vehicle ventilation system, a low-temperature warehouse cooling system, a medical rapid cooling apparatus, and so on.
The above embodiments have been described with respect to the case of the one-stage convergmg-divergmg nozzle. The present invention is not limited thereto, but can adopt a two-stage convergmg-divergmg nozzle each stage being connected m series . Here, in the case of the heating nozzle, any nozzle can be used if it can suffice the condition that the fluid having passed through the throat of the nozzle can generate the vertical impulse waves.
Also, the ratio between the large aperture of the nozzle and the diameter of the throat is determined according to a load connected to a heat exchanger, which is thus not limited to a particular value.
The cooling nozzle 30a and the heating nozzle 30b m the present invention can be constructed m a combination type as shown m FIG. 3 or m an individual type as shown in FIG. 4. Also, the cooling load or heating load, which is connected to the respective nozzles 30a and 30b, can use air or water as a heat transfer medium.
Thus, the two heat exchangers 43 and 44 as shown m FIG. 4 can be used for a combined use in a supply of heating and heated water. As an option, the heating heat exchanger 42 for discharging heated air can be combined.
Since the present invention is not a combustion type heating system, it is possible to realize an air-conditioning system that performs cooling and heating with a simple structure and selectively according to a user selection.
Industrial Applicability
As described above, the present invention can realize an air-conditioning system of a non-combustion, non-fuel and non-pollution (3N) type, with a simple structure, at a low cost, and in a compact fashion, which a compressed fluid such as gas is used to generate vertical impulse waves and thus convert high kinetic energy of the fluid into thermal energy, or is forced to pass through a throat of a nozz±e under the condition that vertical impulse waves are not generated, thereby rapidly expanding the compressed fluid and thus lowering the temperature of the fluid, to then generate cooling air or refrigerate water by heat exchange with the cooled fluid.
Although the preferred embodiments of the invention have been disclosed for illustrative purposes, those skilled m the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed m the accompanying claims.

Claims

1. An energy converting apparatus comprising: a rotating force generator for generating a rotating force m accordance with electrical energy applied thereto; compression means for compressing the mass of a fluid to a maximum compression degree in accordance with the rotating force applied thereto, thereby converting rotating energy corresponding to the rotating force into kinetic energy of the fluid; and impulse wave converting means for converting the kinetic energy of the fluid into thermal energy by forcing the compressed fluid to pass through a throat in a nozzle m a normal flow and iso-entropy flow fashion, to accelerate and to generate vertical impulse waves.
2. The energy converting apparatus of claim 1, wherein said impulse wave converting means comprises a Laval nozzle having a first diameter portion whose inner circumference has the same diameter as that of an outlet of the compression means, a second diameter portion having a gradually decreasing diameter, a third portion having a gradually increasing diameter, and a fourth diameter portion having the same diameter as that of the first diameter portion, which are formed m succession.
3. The energy converting apparatus of claim 2, wnerein a diameter ratio between the first and fourth diameter portions and the throat is set in such a manner that velocity of the compressed fluid having passed through a throat between the first and third diameter portions in the nozzle is accelerated at a velocity over Mach 1.5.
4. The energy converting apparatus of claim 1, further comprising a heating heat exchanger for conducting a heat exchange of the thermal energy with water, and circulating the resultant heated water through a heating conduit.
5. The energy converting apparatus of any one of claims 1 to 4, further comprising a heated water heat exchanger for conducting a heat exchange of the thermal energy with water, and discharging the resultant heated water through a heated water conduit.
6. The energy converting apparatus of any one of claims 1 to 4 , further comprising a heated air heat exchanger for conducting a heat exchange of the thermal energy with air, and discharging the resultant heated air through a heated air conduit.
7. The energy converting apparatus of any one of claims 1 to 4, wherein said fluid is one selected from the group consisting of air, N2, Freon, and inert gas.
8. An energy converting method comprising the steps of : applying electrical energy to an electric motor, thereoy generating a rotating force; applying the rotating force to a compressor to compress the mass of a fluid to a maximum compression degree, thereoy converting the rotating energy corresponding to the rotating force into kinetic energy of the fluid; and forcing the compressed fluid to pass through a throat of a converging-diverging nozzle, in a normal flow and iso-entropy flow fashion, to accelerate at a velocity over
Mach 1.5 and to generate vertical impulse waves, thereoy converting the kineticenergyofthefluidinto thermal energy .
9. An energy converting method of claim 8, further comprising the steps of conducting a heat exchange with a heat transfer medium and supplying the heated heat transfer medium to a heating load.
10. An energy converting method comprising the steps of: applying electrical energy to an electric motor, thereoy generating a rotating force; applying the rotating force to a compressor to compress the mass of a fluid to a maximum compression degree, thereby converting rotating energy corresponding to the rotating force into kinetic energy of the fluid; forcing the compressed fluid to pass through a throat of a convergmg-divergmg nozzle m a normal flow and iso-entropy flow fashion to accelerate at a velocity of the fluid between Mach 1 and Mach 1.5 and rapidly expand, thereby decreasing the temperature and pressure of the fluid, and cooling the fluid; and conducting a heat exchange using the cooled fluid, thereby cooling a heat transfer medium.
11. The energy converting method of claim 10, wherein said fluid is one selected from the group consisting of air,
N^, Freon, and inert gas.
12. An air-conditioning system comprising: a rotating force generator for generating a rotating force in accordance with electrical energy applied thereto; compression means for compressing the mass of a fluid to a maximum compression degree in accordance with the rotating force applied thereto, thereby converting rotating energy corresponding to the rotating force into kinetic energy of the fluid; a heating convergmg-divergmg nozzle for forcing the compressed fluid to pass through a throat in the nozzle a normal flow and iso-entropy flow fashion to accelerate at a velocity of the fluid over Mach 1.5 and generate vertical impulse waves, thereby converting the kinetic energy of the fluid to thermal energy; a cooling convergmg-divergmg nozzle for forcing the compressed fluid to pass through a throat m t"e nozzle m a normal flow and iso-entropy flow fashion to accelerate at a velocity of the fluid between Mach 1 and Mach 1.5 and rapidly expand, thereby decreasing the temperature and pressure of the fluid, and cooling the fluid; a plurality of heating heat exchangers for conducting a heat exchange of the thermal energy with the heat transfer medium and supplying the heated heat transfer medium to a heating load; and at least one cooling heat exchanger for conductmα a heat exchange using the cooled fluid and supplying the cooled heat transfer medium to a cooling load.
13. The air-conditioning system of claim 12, wherein said heat transfer medium for the heating heat exchanger is one of air and heating water.
14. The air-conditioning system of claim 12, here±n said heat transfer medium for the cooling heat exchanger is one of air and cooling water.
15. An air-conditioning system comprising: a rotating force generator for generating a rotating force in accordance with electrical energy applied thereto; compression means for compressing the mass of a fluid to a maximum compression degree in accordance with the rotating force applied thereto, thereby converting rotating energy corresponding to the rotating force into kinetic energy of the fluid; a heating convergmg-divergmg nozzle for forcing the compressed fluid to pass through a throat the nozzle a normal flow and iso-entropy flow fashion to accelerate at a velocity of the fluid over Mach 1.5 and generate vertical impulse waves, thereby converting the kinetic energy of the fluid to thermal energy; a heating heat exchanger for conducting a heat exchange of the thermal energy with water and supplying the heated water through a heating conduit; and a heated water heat exchanger for conducting a heat exchange using the thermal energy with water and discharging the heated water.
PCT/KR2000/000837 1999-07-30 2000-07-31 Energy converting apparatus using vertical impulse wave, method thereof and air-conditioning system WO2001009556A2 (en)

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KR10-2001-7004064A KR100504764B1 (en) 1999-07-30 2000-07-31 Energy Converting Apparatus Using Vertical Impulse Wave, Method thereof and Air-conditioning System

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KR20010075483A (en) 2001-08-09

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