WO1982004474A1 - Process and device for producing domestic hot water from the heat power wasted in cooling down vehicle engines - Google Patents

Process and device for producing domestic hot water from the heat power wasted in cooling down vehicle engines Download PDF

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Publication number
WO1982004474A1
WO1982004474A1 PCT/FR1982/000095 FR8200095W WO8204474A1 WO 1982004474 A1 WO1982004474 A1 WO 1982004474A1 FR 8200095 W FR8200095 W FR 8200095W WO 8204474 A1 WO8204474 A1 WO 8204474A1
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WIPO (PCT)
Prior art keywords
pump
water
vehicle
engine
circuit
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Application number
PCT/FR1982/000095
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French (fr)
Inventor
Raymond Louis Pochard
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Raymond Louis Pochard
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Publication date
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Publication of WO1982004474A1 publication Critical patent/WO1982004474A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D2020/0004—Particular heat storage apparatus
    • F28D2020/0026—Particular heat storage apparatus the heat storage material being enclosed in mobile containers for transporting thermal energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a device intended to supply water for domestic use from a modified cooling system of a heat engine used for the propulsion of a vehicle and by means of ther mioue storage.
  • Another project DE-A-2930 269 aims to use the fluid of the engine cooling circuit as storage fluid, or directly exchange the heat of said circuit by means of an exchanger located in a tank without circulation of the storage fluid therefore with low heat exchanges.
  • the capacity of the cooling circuit is considerably increased. In general, the practical use of heat or hot water is not clear.
  • the present invention aims to remedy the drawbacks of these various proposals.
  • the invention as characterized in the claims solves the problem of efficient heating of domestic water over short distances without modifying the capacity of the engine cooling circuit.
  • the practical use of heated water is advantageously achieved thanks to the features of the device.
  • the vehicle with or without annex (trailer, caravan) is provided with two independent and closed hydraulic circuits, that is to say with each a outward journey (hot fluid) and a return journey (cold fluid), one for cooling the engine, the other forming the storage circuit.
  • These closed circuits are traversed by different fluids, coolant for the engine, heat transfer fluid, for example water for domestic use, for the storage circuit.
  • the cooling circuit includes two thermostatic valves commonly designated by their brand name "calorstat".
  • the first valve is normally located at the setting of the water pump and the second, at the outlet of the exchanger, controls the circuit of the racer.
  • the storage tank is advantageously provided with stratification plates allowing a maximum temperature difference between the two circuits of the exchanger, which facilitates exchanges.
  • the circulation pump in the storage circuit provides very good heat exchanges. Said pump also makes it possible to ensure the use of hot water on the vehicle or to transfer it outside the latter.
  • Charging of the stationary vehicle can be provided by circulation, stored hot water, in a convector.
  • the adaptation of the device to the vehicle can be facilitated, for certain embodiments, by the use of integrated exchangers ev. radiator .
  • An additional advantage resides in an improvement in the thermal regulation of the engine and in its setting in thermal mode thanks to the two thermostatic valves commonly called "CALORSTAT" and designated in the continuation of the patent by this designation.
  • Figure 1 shows an exemplary embodiment with an integrated type choke-radiator device, a pump driven by an electric motor and the use of hot water by transfer to a fixed tank thanks to the reversal of the direction of rotation of the pump. .
  • FIG. 1 shows the detail of the fixed capacity and its connection.
  • FIG. 3 shows an exemplary embodiment with an exchanger-radiator device of the integrated type, a pump with mechanical drive by the motor or by coupling to the water pump of the cooling circuit and direct use of hot water by means of a connection to a cold water supply and hot water distribution network.
  • Figure 4 shows an exemplary embodiment with a liquid-liquid tube bundle discharge device located at the location of a cooling circuit piping, a pump driven by an electric motor and direct use of hot water on the vehicle or its annex
  • the heating of the stationary vehicle can be ensured by means of a convector.
  • Figure 1 shows a complete embodiment of the cooling circuit (1,2,3 or 4,5,6) and the storage circuit (8,10,12,16,9).
  • the normal radiator is replaced by a li ⁇ uide-eir exchanger, liquid-liquid of the integrated type, shown from the front to facilitate understanding.
  • Part 4 corresponds to a conventional water-air radiator with an associated fan.
  • Part 3 corresponds to the primary of a water-water exchanger.
  • thermostatic valve device commonly referred to as
  • “calorstat” 5 can also be integrated between parts 4 and 3.
  • the exchanger 6 of suitable exchange surface (0.05 to 0.2 m or more) of the U-tube bundle style, or other, towards secondary water, allows the inlet and outlet pipes to be grouped in the lower part. In addition, this system facilitates expansion due to temperature variations.
  • the engine cooling circuit, or primary circuit then comprises the pump 1, the "calorstat” 2, the assembly 3 and 4, the “calorstat” 5 and the return and return lines 6 of the pump. When the engine water temperature is sufficient, the "calorstat" 2 allows the circulation of water in 3, the "calorstat” 5 closing the circuit 4.
  • the heat is exchanged by 8 in the secondary circuit or the pump 9, electrically driven by the motor 33, ensures the circulation of the fluid as soon as the temperature measured by the thermal probe 34 is sufficient on the cooling circuit (ex: 40o or 60 °).
  • the pump is automatically stopped when the desired temperature of the storage circuit, measured by the thermal probe 35 is reached (ex: 60 to 80 ° c).
  • the pump is variable speed. This speed advantageously believes, gradually, that the temperature difference, called pinching, between primary and secondary decreases, in order to increase the exchange coefficient given by a relation of the type: k: coefficient: Prantl number of the liquid ⁇ T: pinching : Reynolds number '. thermal conductivity of fluid P: motor power
  • the Reynolds number is directly related to the rotation speed of the pump, but also to the physical properties of the fluid. It is therefore possible to determine a law of variation of the speed of rotation of the pump as a function of the temperature and the nip for a given average power.
  • An electronic assembly 37 can perform the functions described above using probes 34 and 35.
  • the lines 10 and 16 connect the storage tank 12 provided with the stratification plates 13 to the exchanger 8 and to the pump 9.
  • the "calorstat" 5 ensures the circulation of the primary coolant in part 4 and limits the flow in part 3.
  • the heat is then evacuated towards the air by 4, a conventional fan device starting to limit the temperature by 4.
  • the pump 9 can then be ensured by means of the pump 9.
  • the latter being driven by the motor 33, the inversion of the polarity of the supply voltage ensures the inversion ⁇ its direction of rotation.
  • the hot water is therefore drawn directly through line 10 , the pump 9 discharging this water through the pipes 16 and 28.
  • the number of valves and solenoid valves required, for closing 21 or opening 20-22 is reduced.
  • the flexible pipes 28 and 29 provide the hydraulic connections.
  • the electronic device 37 can control the operation and the stopping of the transfer of hot water.
  • the valve 17 makes it possible to avoid any accidental overpressure which could not be compensated by the expansion volume 14 at the storage circuit.
  • the stratification plates 13 avoid as much as possible the mixing of cold water and hot water during the transfer.
  • Sealed "STAUBLI" quick couplings can replace valves 20-22 (figure 1) and 24-25.
  • the valves 26 and 27 can be used to isolate the tank 32 from the cold water inlet 30 and from the hot water outlet 31.
  • Figure 3 shows a variant of the device shown in Fig.1 in which the pump 9 to the secondary circuit is driven directly by the engine or mechanically coupled to the pump 1 of the cooling circuit.
  • An additional "calorstat" 11 and a “bypass” 15 located on the secondary circuit are then necessary if it is desired to adjust the flow rate in part 8 and towards the reservoir 12.
  • the "calorstat" device 5 can be located on an annex pipe connecting the radiator part 4 and the exchanger part 3.
  • the valve 17 prevents any accidental overpressure which could not be compensated by the expansion tank 14 integrated into the storage tank 12.
  • the assembly 12-14 is then easily removable.
  • the tank 12 is used like a normal hot water tank.
  • FIG. 4 shows an embodiment with a liquid-liquid exchanger 3-8 tube bundle of low pressure drop, and suitable exchange surface (0.05 to 0.2 m 2 or more) located on the route of a hot water hose.
  • the primary part 3 of the exchanger is extended by a calibrated pipe 7 as the return of the coolant to the engine. In the case of FIGS. 1 and 3, this return function was directly provided by the cold water box of the integrated exchanger. The operation is identical to those described above.
  • the "calorstat" 5 opens ensuring circulation of the cooling fluid preferably in the radiator 4.
  • the contacts 38 and 39 of the thermostats 34 and 35 respectively ensure the starting and automatic stopping of the engine 33.
  • the tap 23 allows the direct distribution of hot water on the vehicle (motorhome, coach ...) or on a hydraulically connected caravan.
  • the pressurization of hot water is then ensured either by means of the pump 9 by starting the engine 33 by means of the electrical contact 40 controlled by the tap 23, or by compressing the expansion volume 14 integrated in the reservoir 12, said compression being caused by the expansion of the water of the storage circuit and the air of said volume 14 or by the combination of the two methods.
  • Heating of the stationary vehicle can then be ensured by means of a convector 18 located on one of the pipes 10 or 16, the opening of the flaps 19 ensures the activation of a thermostat 36 controlling the setting in route from motor 33 to pump 9 to. by means of a contact 40.
  • the flaps 19 being closed during the heating phase of the water, this device causes only a small loss of heat and does not modify the performance of the storage circuit.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The invention relates to the production of domestic hot water from the heat power wasted in thermal engines. The device comprises two closed hydraulic circuits, in which are circulating two different fluids, each of these circuits being provided with its own pump. The primary or cooling circuit comprises a liquid-air exchanger (4) and a liquid-liquid exchanger (3). The secondary circuit (8) enables the domestic water to be heated, circulating by means of the pump (9) from the capacity (12). The device of the "calorstat" type (2) circulates the fluid driven by the pump (1) towards (3) when the temperature of the engine is sufficient. The device (5) circulates the primary fluid (4) when the engine's temperature (3) becomes too high. Thermostats (34, 35) allow the pump (9) to be started as soon as the temperature of the cooling liquid reaches 40?o to 80?oC and to be stopped when the temperature of the domestic water is high enough (60?o to 80?oC). The thus produced hot water may be used on the vehicle (motor home, caravan) or in a house either by transfer in a tank by means of valves such as (20, 21, 22) and flexible tubing (28, 29) or by using capacity (12) as a normal hot water reservoir.

Description

Procédé et dispositif de production d'eau chaude à usege domestique à partir de l'énergie perdue au cours du refroidissement des moteurs αe véhicules. Method and device for producing domestic use hot water from energy lost during the cooling of vehicle engines.
L'invention concerne un dispositif αestiné à fournir de l'eau à usage domestique à partir d'un système de refroidissement modifié d'un moteur thermique utilisé pour la propulsion d'un véhicule et au moyen d'un stockage ther mioue.The invention relates to a device intended to supply water for domestic use from a modified cooling system of a heat engine used for the propulsion of a vehicle and by means of ther mioue storage.
l'énergie extraite, lors du refroidissement nécessaire, des moteurs à cycles deux ou cuetre temps est actuellement évacuée par des échangeurs (radiateurs) dans l'atmosphère ambiante. L'utilisation quotidienne des véhi cules par exemple pour des trajets de l'ordre ce 10 à 100 kms ou plus représente donc une dissipation importantethe energy extracted, during the necessary cooling, from two or two-stroke cycle engines is currently evacuated by exchangers (radiators) in the ambient atmosphere. Daily use of vehicles for example for journeys of the order of 10 to 100 km or more therefore represents significant dissipation
Certaines propositions visent à réguler ces écnarges vers l'extérieur par un stockage limité de la chaleur produite, qui est de toute façon destinée à être perdue. D'autres propositions DE-A- 2821 690 et DE-A 2635 632 sounaitent emprunter la chaleur de l'eau de refroidissement ou des gazs d'échappement et la stocker sur le véhicule afin de la délivrer ensuite à des points de ramassage pour une utilisation domestique ou industrielle. Les intentions restent très générales et aucun dispositif suff isemment précis n'est défini.Certain proposals aim at regulating these displays towards the outside by a limited storage of the heat produced, which is in any case destined to be lost. Other proposals DE-A- 2821 690 and DE-A 2635 632 can borrow the heat from the cooling water or the exhaust gases and store it on the vehicle in order to then deliver it to collection points for a domestic or industrial use. The intentions remain very general and no sufficiently precise device is defined.
Un autre projet DE-A- 2930 269 vise à utiliser le fluide du circuit de refroidissement du moteur comme fluide de stockage, ou échange directement la chaleur du dit circuit au moyen d'un échangeur situé dans un réservoir sans circulation du fluide de stockage donc avec de faibles échanges thermiques. De plus la contenance du circuit de refroidissement se trouve considérablement augmentée. D'une façon générale l'utilisation pratique de la chaleur ou de l'eau chaude n'apparaît pas clairement.Another project DE-A-2930 269 aims to use the fluid of the engine cooling circuit as storage fluid, or directly exchange the heat of said circuit by means of an exchanger located in a tank without circulation of the storage fluid therefore with low heat exchanges. In addition, the capacity of the cooling circuit is considerably increased. In general, the practical use of heat or hot water is not clear.
La présente invention a pour but de remédier aux inconvénients de ces diverses propositions. L'invention telle qu'elle est caractérisée dans les revendications résoud le problème d'un chauffage efficace de l'eau domestique sur de courtes distances sans modification de la contenance du circuit de refroidissement du moteur. De plus l'utilisation pratique de l'eau chauffée est avantageusement réalisée grâce aux particularités du dispositif. Dans la présente invention le véhicule avec ou sans annexe (remorque, caravane) est muni de deux circuits hydrauliques indépendants et fermés, c'est-à-dire avec chacun un trajet aller (fluide chaud) et un trajet retour (fluide froid), l'un de refroidissement du moteur, l'autre formant le circuit de stockage. Ces circuits fermés sent parcourus par des fluides différents, liquide de refroidissement pour le moteur, fluide caloporteur, par exemple de l'eau à usage domestique, pour le circuit de stockage. Ces deux circuits ont chacun en propre un e pompe de circulation et sont reliés thermiquement par un échangeur de chaleur implanté sur le dit circuit de refroidissement, lequel conserve approximativement sa contenance initiale. Le circuit de refroidissement comporte deux vannes thermcstatiques communément désignées par leur marque de fabricue "calorstat". La première vanne est normalement située à la sertie de la pompe à eau et la seconde, à la sortie de l'échangeur, pilote le circuit du raciateur. Le réservoir de stockage se trouve avantageusement pourvu de plaques de stratification permettant d'avoir un écart de température maximum entre les deux circuits de l'échangeur, ce qui facilite les échanges. La pompe de circulation du circuit de stockage permet d'obtenir de très bons échanges thermiques. La dite pompe permet également d'assurer l'utilisation de l'eau chaude sur le véhicule ou de la transférer à l'extérieur de ce dernier.The present invention aims to remedy the drawbacks of these various proposals. The invention as characterized in the claims solves the problem of efficient heating of domestic water over short distances without modifying the capacity of the engine cooling circuit. In addition, the practical use of heated water is advantageously achieved thanks to the features of the device. In the present invention, the vehicle with or without annex (trailer, caravan) is provided with two independent and closed hydraulic circuits, that is to say with each a outward journey (hot fluid) and a return journey (cold fluid), one for cooling the engine, the other forming the storage circuit. These closed circuits are traversed by different fluids, coolant for the engine, heat transfer fluid, for example water for domestic use, for the storage circuit. These two circuits each have their own circulation pump and are thermally connected by a heat exchanger installed on said cooling circuit, which retains approximately its initial capacity. The cooling circuit includes two thermostatic valves commonly designated by their brand name "calorstat". The first valve is normally located at the setting of the water pump and the second, at the outlet of the exchanger, controls the circuit of the racer. The storage tank is advantageously provided with stratification plates allowing a maximum temperature difference between the two circuits of the exchanger, which facilitates exchanges. The circulation pump in the storage circuit provides very good heat exchanges. Said pump also makes it possible to ensure the use of hot water on the vehicle or to transfer it outside the latter.
Les avantages obtenus grâce à cette invention consistent essentiellement en ceci, que la séparation des circuits de refroidissement et de stockage assure la production directe sur le véhicule d'eau chaude à usage domestique sur des distances relativement courtes (10 à 50 kms ) grâce à la grande qualité des échanges thermiques. La faible modi fication des caractéristiques du circuit de refroidissement (volume, géométrie, trajets du fluide) permet d'utiliser la pompe à eau d'origine sur le dit circuit et la quantité normale de liquide de refroidissement. Un autre avantage important est la réversibilité totale du dispositif qui as sure le fonctionnement normal du moteur en cas de vidange du circuit de stockage et permet donc la dépose éventuelle du réservoir, le véhicule retrouvant alors son poids d'origine à 15 ou 20 kg près. L'utilisation de l'eau chaude sur le véhicule ou à l'extérieur de celui-ci est grandement facilitée grâce à la pompe du circuit de stockage. Le charffcge du véhicule à l'arrêt (camping-car, autocar, ...) peut être assuré par circulation, de l'eau chaude stockée, dans un convecteur. L'adaptation du dispositif au véhicule peut être facilitée, pour certaines formes de réalisation, par l'utilisation d'échangeurs intégrés ev. radiateur . Un avantage annexe réside dans une amélioration de la régulation thermique du moteur et de sa mise en régime thermique grâce aux deux vannes thermostatiques communément appelées "CALORSTAT" et désignées dans la suite du brevet par cette appellation. D'autres caractéristiques et avantages de la présente invention ressortiront de le description qui va suivre, faite en regard des dessins annexés et donnant à titre explicatif mais nullement limitatif diverses formes de réalisation de l'invention.The advantages obtained thanks to this invention consist essentially in this, that the separation of the cooling and storage circuits ensures the direct production on the vehicle of hot water for domestic use over relatively short distances (10 to 50 kms) thanks to the high quality of heat exchange. The small modification of the characteristics of the cooling circuit (volume, geometry, paths of the fluid) makes it possible to use the original water pump on the said circuit and the normal quantity of coolant. Another important advantage is the total reversibility of the device which ensures the normal functioning of the engine in the event of emptying of the storage circuit and therefore allows the possible removal of the tank, the vehicle then regaining its original weight to within 15 or 20 kg. . The use of hot water on or outside the vehicle is greatly facilitated by the storage circuit pump. Charging of the stationary vehicle (camper, coach, ...) can be provided by circulation, stored hot water, in a convector. The adaptation of the device to the vehicle can be facilitated, for certain embodiments, by the use of integrated exchangers ev. radiator . An additional advantage resides in an improvement in the thermal regulation of the engine and in its setting in thermal mode thanks to the two thermostatic valves commonly called "CALORSTAT" and designated in the continuation of the patent by this designation. Other characteristics and advantages of the present invention will emerge from the description which follows, given with reference to the appended drawings and giving, by way of explanation but in no way limiting, various embodiments of the invention.
La figure 1 montre un exemple de réalisation avec un dispositif échengeur-radiateur de type intégré, une pompe à entraînement par moteur électrique et une utilisation de l'eau chaude par transfert vers un réservoir fixe grâce à l'inversinαedu sens de rotation de la pompe.Figure 1 shows an exemplary embodiment with an integrated type choke-radiator device, a pump driven by an electric motor and the use of hot water by transfer to a fixed tank thanks to the reversal of the direction of rotation of the pump. .
La figure 2 montre le détail de la capacité fixe et de son raccordement.Figure 2 shows the detail of the fixed capacity and its connection.
Ls figure 3 montre un exemple de réalisation avec un dispositif échangeur-radiateur de type intégré, une pompe à entraînement mécanique par le moteur ou par couplage à la pompe à eau du circuit de refroidissement et une utilisation directe de l'eau chaude grâce à un raccordement à un réseau d'alimentation en eau froide et de distribution en eau chaude.FIG. 3 shows an exemplary embodiment with an exchanger-radiator device of the integrated type, a pump with mechanical drive by the motor or by coupling to the water pump of the cooling circuit and direct use of hot water by means of a connection to a cold water supply and hot water distribution network.
La figure 4 montre un exemple de réalisation avec un éehargeur liquide-liquide à faisceau de tube situé à l'emplacement d'une tuyauterie du circuit de refroidissement, une pompe à entraînement par moteur électrique et une utilisation directe de l'eau chaude sur le véhicule ou son annexe Le chauffage du véhicule à l'arrêt peut être assuré au moyen d'un convec-teur. La figure 1 présente un exemple de réalisation complet du circuit de refroidissement (1,2,3 ou 4,5,6) et du circuit de stockage (8,10,12,16,9). Le radiateur normal est remplacé par un échangeur liαuide-eir, liquide-liquide de type intégré, représenté de face peur faciliter la compréhension. La partie 4 correspond à un radiateur eau air classique avec un ventilateur associé. La partie 3 correspond au primaire d'un échangeur eau-eau. L'intérêt d'un tel dispositif intégré est d'avoir des boites à eau primaire communes aux deux parties de l'échangeur, donc de simplifier les raccordements. De plus le remplacement d'un radiateur normal par un tel dispositif est aisé et peut donc permettre d'adapter facilement la présente invention sur les véhicules actuels. Un dispositif de vanne thérmostatiσue communément désigné sous le nom deFigure 4 shows an exemplary embodiment with a liquid-liquid tube bundle discharge device located at the location of a cooling circuit piping, a pump driven by an electric motor and direct use of hot water on the vehicle or its annex The heating of the stationary vehicle can be ensured by means of a convector. Figure 1 shows a complete embodiment of the cooling circuit (1,2,3 or 4,5,6) and the storage circuit (8,10,12,16,9). The normal radiator is replaced by a liαuide-eir exchanger, liquid-liquid of the integrated type, shown from the front to facilitate understanding. Part 4 corresponds to a conventional water-air radiator with an associated fan. Part 3 corresponds to the primary of a water-water exchanger. The advantage of such an integrated device is to have primary water boxes common to the two parts of the exchanger, and therefore to simplify the connections. In addition, replacing a normal radiator with such a device is easy and can therefore allow the present invention to be easily adapted to current vehicles. A thermostatic valve device commonly referred to as
"calorstat" 5 peut également être intégré entre les parties 4 et 3. L'échangeur 6 de surface d'échange convena ble (0,05 à 0,2 m ou plus) du style faisceau de tubes en U, ou autre, vers l'eau secondaire, permet de regrouper les tuyauteries d'entrée et de sortie dans la partie basse. De plus ce système facilite les dilatations dues aux variations de températures. Le circuit de refroidissement du moteur, ou circuit primaire, comprend alors la pompe 1, le "calorstat" 2, l'ensemble 3 et 4, le "calorstat" 5 et les conduits aller et retour 6 de la pompe. Quand la température de l'eau du moteur, est suffisante, le "calorstat" 2 permet la circulation de l'eau dans 3, le "calorstat" 5 fermant le circuit 4. La chaleur est échangée par 8 dans le circuit secondaire ou la pompe 9, entraînée électriquement par le moteur 33, assure la circulation du fluide dès-que la température mesurée par la sonde thermique 34 est suffisante sur le circuit de refroidissement (ex : 40º ou 60°). La pompe est arrêtée automatiquement lorsque la température désirée du circuit de stockage, mesurée par la sonde thermique 35 est atteinte (ex : 60 à 80° c). La pompe est à vitesse variable. Cette vitesse croit avantageusement, au fur et à mesure, que l'écart de température, appelé pincement, entre primaire et secondaire diminue, afin d'augmenter le coefficient d'échange donné par une relation du type :
Figure imgf000008_0001
k : coefficient :nombre de Prantl du liquide ΔT : pincement
Figure imgf000008_0002
:nombre de Reynolds '. conductivité thermique du fluide P : puissance du moteur"calorstat" 5 can also be integrated between parts 4 and 3. The exchanger 6 of suitable exchange surface (0.05 to 0.2 m or more) of the U-tube bundle style, or other, towards secondary water, allows the inlet and outlet pipes to be grouped in the lower part. In addition, this system facilitates expansion due to temperature variations. The engine cooling circuit, or primary circuit, then comprises the pump 1, the "calorstat" 2, the assembly 3 and 4, the "calorstat" 5 and the return and return lines 6 of the pump. When the engine water temperature is sufficient, the "calorstat" 2 allows the circulation of water in 3, the "calorstat" 5 closing the circuit 4. The heat is exchanged by 8 in the secondary circuit or the pump 9, electrically driven by the motor 33, ensures the circulation of the fluid as soon as the temperature measured by the thermal probe 34 is sufficient on the cooling circuit (ex: 40º or 60 °). The pump is automatically stopped when the desired temperature of the storage circuit, measured by the thermal probe 35 is reached (ex: 60 to 80 ° c). The pump is variable speed. This speed advantageously believes, gradually, that the temperature difference, called pinching, between primary and secondary decreases, in order to increase the exchange coefficient given by a relation of the type:
Figure imgf000008_0001
k: coefficient: Prantl number of the liquid ΔT: pinching
Figure imgf000008_0002
: Reynolds number '. thermal conductivity of fluid P: motor power
Le nombre de Reynolds est directement lié à la vitesse de rotation de la pompe, mais également aux propriétés physiques du fluide. Il est donc possible de déterminer une loi de variation de la vitesse de rotation de la pompe en fonction de la température et du pincement pour une puissance moyenne donnée. Un ensemble électronique 37 peut réaliser les fonctions décrites précédemment à l'aide des sondes 34 et 35. Lee conduites 10 et 16 relient le réservoir de stockage 12 munis des plaques de stratification 13 à l'échangeur 8 et à la pompe 9 . Lorsque la température de la partie 3 devient trop importante (ex : 70 à 85º) le "calorstat" 5 assure le circulation du liquide de refroidissement primaire dans la partie 4 et limite le débit dans la partie 3. La chaleur est alors évacuée vers l'air par 4, un dispositif classique de ventilateur se mettant en route pour limiter la température de 4. Le transfert de l'eau chaude de la capacité 12 vers une capacité fixe 32 (fig. 2 . peut alors être assurée au moyen de la pompe 9. Celle-ci étant entraînée par le moteur 33 l'inversion de la polarité de la tension d'alimentation assure l'inversion αε son sens de rotation. L'aspiration de l'eau chaude se fait donc directement par la conduite 10, la pompe 9 refoulant cette eau par les tuyauteries 16 et 28. Le nombre des vannes et électrovannes nécessaires, à fermeture 21 ou ouverture 20-22 est réduit. Les conduites souples 28 et 29 assurent les liaisons hydrauliques. Le dispositif électronique 37 peut contrôler le fonctionnement et l'arrêt du transfert d'eau chaude. La soupape 17 permet d'éviter toute surpression accidentelle qui ne pourrait être compensée par le volume d'expansion 14 au circuit de stockage.The Reynolds number is directly related to the rotation speed of the pump, but also to the physical properties of the fluid. It is therefore possible to determine a law of variation of the speed of rotation of the pump as a function of the temperature and the nip for a given average power. An electronic assembly 37 can perform the functions described above using probes 34 and 35. The lines 10 and 16 connect the storage tank 12 provided with the stratification plates 13 to the exchanger 8 and to the pump 9. When the temperature of part 3 becomes too high (eg: 70 to 85º) the "calorstat" 5 ensures the circulation of the primary coolant in part 4 and limits the flow in part 3. The heat is then evacuated towards the air by 4, a conventional fan device starting to limit the temperature by 4. The transfer of hot water from capacity 12 to a fixed capacity 32 (fig. 2. can then be ensured by means of the pump 9. The latter being driven by the motor 33, the inversion of the polarity of the supply voltage ensures the inversion αε its direction of rotation. The hot water is therefore drawn directly through line 10 , the pump 9 discharging this water through the pipes 16 and 28. The number of valves and solenoid valves required, for closing 21 or opening 20-22 is reduced. The flexible pipes 28 and 29 provide the hydraulic connections. The electronic device 37 can control the operation and the stopping of the transfer of hot water. The valve 17 makes it possible to avoid any accidental overpressure which could not be compensated by the expansion volume 14 at the storage circuit.
Sur la figure 2 la capacité 32 avec ses plaques de stratification 13, les vannes ou électrovannes 24 et 25 étant ouvertes, voit arriver l'eau chaude par 28 et repartir l'eau froide par 29 vers la capacité 12 (figure 1). Les plaques de stratification 13 évite au maximum le mélange eau froide eau chaude lors du transfert. Des raccords rapides étanchεε genre "STAUBLI" peuvent remplacer les vannes 20-22 (figure 1) et 24-25. Les vannes 26 et 27 peuvent permettre d'isoler le réservoir 32 de l'arrivée d'eau froide 30 et du départ d' au chaude 31.In FIG. 2, the capacity 32 with its stratification plates 13, the valves or solenoid valves 24 and 25 being open, sees the hot water arriving by 28 and leaving the cold water by 29 towards the capacity 12 (FIG. 1). The stratification plates 13 avoid as much as possible the mixing of cold water and hot water during the transfer. Sealed "STAUBLI" quick couplings can replace valves 20-22 (figure 1) and 24-25. The valves 26 and 27 can be used to isolate the tank 32 from the cold water inlet 30 and from the hot water outlet 31.
La figure 3 montre une variante du dispositif présenté Fig.1 dans laquelle la pompe 9 au circuit secondaire est entraînée directement par le moteur thermique ou couplée mécaniquement à la pompe 1 du circuit de refroidissement. Un "calorstat" supplémentaire 11 et un "by pass" 15 situés sur le circuit secondaire sont alors nécessaires si l'on désire régler le débit dans la partie 8 et vers le réservoir 12 . Le dispositif " calorstat" 5 peut être situé sur une conduite annexe reliant la partie radiateur 4 et la partie échangeur 3. La soupape 17 prévient toute surpression accidentelle qui ne pourrait être compensée par le vase d'expansion 14 intégré au réservoir de stockage 12. L'ensemble 12-14 est alors facilement déposable. Le réservoir 12 est utilisé comme un ballon d'eau chaude normal. Des raccords hydrauliques étanches genre "STAUBLI" 20 et 23 permettent de relier le réservoir 12 d'une part au réseau d'alimentation en eau froide 30, d'autre part au circuit de distribution d'eau chaude par la conduite 31. Le véhicule doit rester immobilisé au plus près du lieu d'utilisation de l'eau chaude.Figure 3 shows a variant of the device shown in Fig.1 in which the pump 9 to the secondary circuit is driven directly by the engine or mechanically coupled to the pump 1 of the cooling circuit. An additional "calorstat" 11 and a "bypass" 15 located on the secondary circuit are then necessary if it is desired to adjust the flow rate in part 8 and towards the reservoir 12. The "calorstat" device 5 can be located on an annex pipe connecting the radiator part 4 and the exchanger part 3. The valve 17 prevents any accidental overpressure which could not be compensated by the expansion tank 14 integrated into the storage tank 12. The assembly 12-14 is then easily removable. The tank 12 is used like a normal hot water tank. Sealed hydraulic connections of the "STAUBLI" type 20 and 23 make it possible to connect the reservoir 12 on the one hand to the cold water supply network 30, on the other hand to the hot water distribution circuit via the pipe 31. The vehicle must remain immobilized as close as possible to the place of use of hot water.
L a figure 4 présente un mode de réalisation avec un échangeur liquide-liquide 3-8 à faisceau de tubes de faible perte de charge, et de surface d'échange convenable (0,05 à 0,2 m2 ou plus) implanté sur le trajet d'une durite d'eau chaude. La partie primaire 3 de l'échangeur est prolongée par une conduite calibrée 7 as s urant le retour du liquide de refroidissement vers le moteur. Dans le cas des figures 1 et 3 cette fonction de retour était directement assurée par la boite à eau froide de l' échangeur intégré. Le fonctionnement est identique à ceux décrits précédemment. Quand l'échangeur 3-8 n'assure plus une évacuation suffisante des calories le "calorstat" 5 s'ouvre assurant la circulation du fluide de refroidissement préférentiellement dans le radiateur 4. Les contacts 38 et 39 des thermostats 34 et 35 assurent respectivement la mise en route et l'arrêt automatique du moteur 33. Le robinet 23 permet la distribution directe de l'eau chaude sur le véhicule (camping-car, autocar ...) ou sur une caravane connectée hydrauliquement. La mise en pression de l'eau chaude est alors assurée soit au moyen de la pompe 9 par la mise en route du moteur 33 grâce au contact électrique 40 commandé par le robinet 23, soit par la compression du volume d'expansion 14 intégré au réservoir 12, la dite compression étant provoquée par la dilatation de l'eau du circuit de stockage et de l'air du dit volume 14 soit par la combinaison des deux procédés. Le chauffage du véhicule à l'arrêt peut alors être assuré au moyen d'un convecteur 18 situé sur l'une des conduites 10 ou 16 dont l'ouverture des volets 19 assure la mise en circuit d'un thermostat 36 contrôlant la mise en route du moteur 33 àe la pompe 9 au. moyen d'un contact 40. Les volets 19 étant fermés pendant la phase de chauffage de l'eau, ce dispositif n'entraine qu'une faible déperdition de chaleur et ne modifie pas les performances du circuit de stockage. L a Figure 4 shows an embodiment with a liquid-liquid exchanger 3-8 tube bundle of low pressure drop, and suitable exchange surface (0.05 to 0.2 m 2 or more) located on the route of a hot water hose. The primary part 3 of the exchanger is extended by a calibrated pipe 7 as the return of the coolant to the engine. In the case of FIGS. 1 and 3, this return function was directly provided by the cold water box of the integrated exchanger. The operation is identical to those described above. When the exchanger 3-8 no longer ensures sufficient removal of the calories, the "calorstat" 5 opens ensuring circulation of the cooling fluid preferably in the radiator 4. The contacts 38 and 39 of the thermostats 34 and 35 respectively ensure the starting and automatic stopping of the engine 33. The tap 23 allows the direct distribution of hot water on the vehicle (motorhome, coach ...) or on a hydraulically connected caravan. The pressurization of hot water is then ensured either by means of the pump 9 by starting the engine 33 by means of the electrical contact 40 controlled by the tap 23, or by compressing the expansion volume 14 integrated in the reservoir 12, said compression being caused by the expansion of the water of the storage circuit and the air of said volume 14 or by the combination of the two methods. Heating of the stationary vehicle can then be ensured by means of a convector 18 located on one of the pipes 10 or 16, the opening of the flaps 19 ensures the activation of a thermostat 36 controlling the setting in route from motor 33 to pump 9 to. by means of a contact 40. The flaps 19 being closed during the heating phase of the water, this device causes only a small loss of heat and does not modify the performance of the storage circuit.

Claims

RevendicationsClaims
1 - Dispositif destiné à fournir de l'eau chaude à usage domestique à partir d'un système de refroidissement modifié d'un moteur thermique utilisé pour la propulsion d'un véhicule, et au moyen d'un stockage thermique, caractérisé par le fait que le dit véhicule avec ou sans annexe (remorque, caravane ...) possède deux circuits hydrauliques distincts et fermés, c'est-à-dire avec chacun un trajet aller (fluidechaud) et un trajet retour (fluide-froid), l'un de refroidissement du moteur, ( 1, 3, 4, 5, 6), l'autre (8, 10, 12, 16, 9) formant le circuit secondaire de stockage, ces circuits fermés étant parcourus par des fluides différents, liquide de refroidissement pour l'un, eau à usage domestique pour l'autre, les deux circuits ayant chacun en propre une pompe de circulation et étant reliés thermiouement par un échangeur de chaleur implanté sans modifier sensiblement la contenance du circuit de refroidissement.1 - Device intended to supply hot water for domestic use from a modified cooling system of a heat engine used for the propulsion of a vehicle, and by means of thermal storage, characterized by the fact that the said vehicle with or without annex (trailer, caravan ...) has two separate and closed hydraulic circuits, that is to say with each one outward journey (fluidechaud) and a return journey (fluid-cold), l one for cooling the engine (1, 3, 4, 5, 6), the other (8, 10, 12, 16, 9) forming the secondary storage circuit, these closed circuits being traversed by different fluids, cooling liquid for one, domestic water for the other, the two circuits each having their own circulation pump and being thermally connected by a heat exchanger installed without significantly modifying the capacity of the cooling circuit.
2 - Dispositif selon la revendication 1 caractérisé par le fait que le circuit de refroidissement modifié utilise un échangeur liquide-liquide(3, 8) de faible perte de charge, afin d'utiliser au mieux la pompe à eau normale du moteur et implanté en remplacement de durites existantes, le dit échangeur (3, 8) comportant un faisceau de tubes en ϋ ou autres afin d'obtenir une surface d'échange convenable (0,05 à 0,2 m2 ou plus), la partie secondaire (8) constituant l'élément de chauffage de l'eau circulant grâce à la pompe (9) vers le réservoir (12). 3 - Dispositif selon les revendications 1 et 2 caractérisé en ce qu'il comporte deux dispositifs communément appelés "Calorstat" afin que la montée en température et le fonctionnement normal du moteur ne soient pas pertur bés, le premier (2) ne permettant le passage de l'eau vers le circuit de refroidissement que lorsque la température de fonctionnement du moteur est atteinte, le se cond (5) assurant l'évacuation de la chaleur, qui n'a pu être échangée avec le circuit secondaire de stockage, vers le radiateur du véhicule (4).2 - Device according to claim 1 characterized in that the modified cooling circuit uses a liquid-liquid exchanger (3, 8) of low pressure drop, in order to best use the normal water pump of the engine and implanted in replacement of existing hoses, the said exchanger (3, 8) comprising a bundle of en or other tubes in order to obtain a suitable exchange surface (0.05 to 0.2 m 2 or more), the secondary part ( 8) constituting the heating element of the water flowing through the pump (9) to the tank (12). 3 - Device according to claims 1 and 2 characterized in that it comprises two devices commonly called "Calorstat" so that the rise in temperature and the normal operation of the engine are not disturbed, the first (2) not allowing passage of water to the cooling circuit only when the engine operating temperature is reached, the cond (5) ensuring the evacuation of the heat, which could not be exchanged with the secondary storage circuit, towards the vehicle radiator (4).
4 - Dispositif selon l'une quelconque des revendications 1, 2 et 3 caractérisé par le fait qu'il utilise un échangeur intégré de type liquide-air (4) et liquide-liquide (3, 6) possèdant au moins une boite à eau commune, entre (4 et 3) une ou des vannes thermostatiques telles que (5), à ouverture ou fermeture, incorporées ou placées sur une ou des tuyauteries annexes et éventuellement des vannes d'isolement et de vidange, cet échangeur intégré rem plaçant alors le radiateur classique.4 - Device according to any one of claims 1, 2 and 3 characterized in that it uses an integrated exchanger of the liquid-air type (4) and liquid-liquid (3, 6) having at least one water box common, between (4 and 3) one or more thermostatic valves such as (5), opening or closing, incorporated or placed on one or more ancillary pipes and possibly isolation and drain valves, this integrated exchanger then replacing the classic radiator.
5 - Dispositif selon la revendication 1 caractérisé par le fait que la pompe (9) permettant la circulation de l'eau à usage domestique du circuit de stockage est entraînée directement par le moteur thermique ou par un couplage à la pompe à eau normale du véhicule.5 - Device according to claim 1 characterized in that the pump (9) allowing the circulation of water for domestic use of the storage circuit is directly driven by the engine or by coupling to the vehicle's normal water pump .
6 - Dispositif selon la revendication 1, caractérisé par le fait qu'un moteur électrique (33) alimenté par le circuit électrique du véhicule assure l'entrainement de la pompe (9) du circuit de stockage.6 - Device according to claim 1, characterized in that an electric motor (33) supplied by the electric circuit of the vehicle ensures the drive of the pump (9) of the storage circuit.
7 - Dispositif selon les revendications 1 et 6 caractérisé par le fait que des dispositifs de contrôle thermostatiques tels (34, 35, 36) assurent la mise en marche, ou l'arrêt du moteur (33), en contrôlant la température du circuit de refroidissement, du circuit de stockage, ou une température dans le véhicule.7 - Device according to claims 1 and 6 characterized in that thermostatic control devices such (34, 35, 36) ensure the implementation starting, or stopping the engine (33), by controlling the temperature of the cooling system, the storage circuit, or a temperature in the vehicle.
8 - Dispositif selon l'une quelconque des revendications 1, 6 et 7 caractérisé par le fait qu'un dispositif électronique (34) permet de régler la tension d'alimentation du moteur (33) et donc sa vitesse en fonction de la température mesurée sur le circuit de stockage ou en fonction d'un écart de température mesuré entre ce circuit et le circuit de refroidissement du moteur.8 - Device according to any one of claims 1, 6 and 7 characterized in that an electronic device (34) makes it possible to adjust the supply voltage of the motor (33) and therefore its speed as a function of the measured temperature on the storage circuit or as a function of a temperature difference measured between this circuit and the engine cooling circuit.
9 - Dispositif selon l'une quelconque des revendications 1, 5, 6, 7 et 8 caractérisé par le fait que la pompe 9 implantée sur le véhicule où sur une annexe est utilisée, au besoin en inversant son sens de rotation, si elle est entraînée par un moteur électrique, pour le transfert de l'eau chaude domestique vers une capacité de stockage (32) liée au lieu d'utilisation.9 - Device according to any one of claims 1, 5, 6, 7 and 8 characterized in that the pump 9 located on the vehicle where on an annex is used, if necessary by reversing its direction of rotation, if it is driven by an electric motor, for the transfer of domestic hot water to a storage capacity (32) linked to the place of use.
10 - Dispositif selon l'une quelconque des revendications 1, 6, 7, 6 et 9 caractérisé par le fait que la pompe 6 du circuit secondaire de stockage d'eau chaude à usage domestique est utilisée pour la distribution de cette eau sur le véhicule dans le cas où celui-ci est un camping-car ou un car de grande randonnée, ou dans une caravane reliée au véhicule.10 - Device according to any one of claims 1, 6, 7, 6 and 9 characterized in that the pump 6 of the secondary circuit for storing domestic hot water is used for the distribution of this water on the vehicle in the case where this is a motorhome or a long-distance coach, or in a caravan connected to the vehicle.
11 - Dispositif selon l'une quelconque des revendications 1 à 4 et 6 à 10 caractérisé par le fait qu'un appareil convecteur (16) destiné au chauffage du véhicule à l'arrêt est implanté sur une des conduites (10) ou (16) du circuit de stockage, le dit convecteur étant munis de volets normalement fermés penoant la phase de stockage et ouverts si l'on désire du chauffage, l'ouverture des dits volets assurant la mise en service d'un thermostat (36) commandent la mise en mar che du moteur (33) entraînant la pompe. (9).11 - Device according to any one of claims 1 to 4 and 6 to 10 characterized in that a convector device (16) for heating the stationary vehicle is located on one of the pipes (10) or (16 ) of the storage circuit, the so-called convector being provided with shutters normally closed during the storage phase and open if heating is desired, the opening of said shutters ensuring the commissioning of a thermostat (36) controls the starting of the engine (33) driving the pump. (9).
12 - Dispositif selon la revendication 1 caractérisé par le fait qu'une ou plusieurs plaques (13) de stratification horizontale équipent le réservoir de stockage (12) afin de délimiter une séparation physique entre l'eau chauffée et l'eau froide, ce dispositif améliorant aussi bien la phase de chauffage que la phase de transfert ou d'utilisation directe de l'eau chaude.12 - Device according to claim 1 characterized in that one or more plates (13) of horizontal stratification equip the storage tank (12) in order to delimit a physical separation between the heated water and the cold water, this device improving both the heating phase and the transfer or direct use phase of hot water.
13 - Dispositif εelon les revendications 1 et 12 caractérisé par le fait que le volume libre d'expansion nécessaire au circuit secondaire est inclus dans le réservoir de stockage permettant éventuellement l'obtention directe d'eau sous pression (1 à quelques bars) grâce à la dilatation de l'eau et de l'air du volume libre,ainsi qu'une plus grande facilité de démontage.13 - Device εelon of claims 1 and 12 characterized in that the free volume of expansion necessary for the secondary circuit is included in the storage tank possibly allowing direct obtaining of pressurized water (1 to a few bars) thanks to the expansion of water and air in the free volume, as well as greater ease of disassembly.
14 - Dispositif selon l'une quelconque des revendications 1 à 7 caractérisé par le fait que les deux circuits distincts et le dispositif thermostatique tel que(5)ou autre permettent d'assurer en cas de vidange complète du circuit secondaire dit de stockage, le refroidissement du moteur par le radiateur normal ou la partie (4) de l'échangeur intégré permettant la dépose du réservoir (12) et le retour du véhicule à son état antérieur. 14 - Device according to any one of claims 1 to 7 characterized in that the two separate circuits and the thermostatic device such as (5) or other allow to ensure in case of complete emptying of the secondary circuit called storage, engine cooling by the normal radiator or the part (4) of the integrated exchanger allowing the removal of the tank (12) and the return of the vehicle to its previous state.
PCT/FR1982/000095 1981-06-10 1982-06-08 Process and device for producing domestic hot water from the heat power wasted in cooling down vehicle engines WO1982004474A1 (en)

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FR8111403810610 1981-06-10
FR8111403A FR2507752B1 (en) 1981-06-10 1981-06-10 METHOD AND DEVICE FOR PRODUCING HOT WATER FOR DOMESTIC USE FROM LOST ENERGY DURING COOLING OF VEHICLE ENGINES

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GB2225096A (en) * 1988-10-14 1990-05-23 Keith Duell Motor vehicle water supply system

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FR2554564A1 (en) * 1983-11-07 1985-05-10 Dujmovic Tomislav Water-heating appliance for vehicles with internal combustion engines, especially for a camping car.
GB0228105D0 (en) 2002-12-03 2003-01-08 Thomason John A Method and apparatus for conserving heat
GB2406901B (en) * 2003-10-06 2007-12-27 Ec Power As Heat transfer system
FR2928975B1 (en) * 2008-03-20 2011-09-23 Patrice Philippe Pierre Claude DEVICE FOR SAVING ENERGY BY STORING THE HOT FLUID AT THE COOLING SYSTEM OUTPUT OF A THERMAL MOTOR OF A MOBILE ENGINE TO RETURN IT TO A HEATING SYSTEM EXTERIOR THEREIN.
FR2994477A1 (en) * 2012-08-10 2014-02-14 Suez Environnement System for recovering part of heat released by thermal engine of vehicle, has connecting/disconnecting unit provided with stationary heat receiving device to transfer heat stored in container from vehicle to receiving device

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GB957460A (en) * 1961-11-03 1964-05-06 Searle Russell John Apparatus for heating water by means of the water cooling system of an internal combustion engine
DE2635632A1 (en) * 1976-08-07 1978-02-09 Sigrid Dipl Ing Reinhard Waste heat recovery system for vehicle engines - consists of thermal storage heat exchanger attached to vehicle side
DE2821690A1 (en) * 1978-05-18 1979-11-22 Harald Biesterfeldt Vehicle with IC engine - has heat store to recover waste energy in exhaust and cooling water
DE2930269A1 (en) * 1979-07-26 1981-03-12 Bruno 6208 Bad Schwalbach Hanke Vehicle engine surplus heat utilisation system - stores heat in accumulator for extraction at tapping point to heat house

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB957460A (en) * 1961-11-03 1964-05-06 Searle Russell John Apparatus for heating water by means of the water cooling system of an internal combustion engine
DE2635632A1 (en) * 1976-08-07 1978-02-09 Sigrid Dipl Ing Reinhard Waste heat recovery system for vehicle engines - consists of thermal storage heat exchanger attached to vehicle side
DE2821690A1 (en) * 1978-05-18 1979-11-22 Harald Biesterfeldt Vehicle with IC engine - has heat store to recover waste energy in exhaust and cooling water
DE2930269A1 (en) * 1979-07-26 1981-03-12 Bruno 6208 Bad Schwalbach Hanke Vehicle engine surplus heat utilisation system - stores heat in accumulator for extraction at tapping point to heat house

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2225096A (en) * 1988-10-14 1990-05-23 Keith Duell Motor vehicle water supply system
GB2225096B (en) * 1988-10-14 1992-09-16 Keith Duell Motor vehicle water supply system

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FR2507752B1 (en) 1986-09-05
EP0081512A1 (en) 1983-06-22
FR2507752A1 (en) 1982-12-17
JPS58500863A (en) 1983-05-26

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