WO2002066905A2 - Solar water heater and pasteurizer - Google Patents
Solar water heater and pasteurizer Download PDFInfo
- Publication number
- WO2002066905A2 WO2002066905A2 PCT/US2002/000091 US0200091W WO02066905A2 WO 2002066905 A2 WO2002066905 A2 WO 2002066905A2 US 0200091 W US0200091 W US 0200091W WO 02066905 A2 WO02066905 A2 WO 02066905A2
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- WO
- WIPO (PCT)
- Prior art keywords
- water
- container
- water heater
- heater according
- energy
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/50—Solar heat collectors using working fluids the working fluids being conveyed between plates
- F24S10/501—Solar heat collectors using working fluids the working fluids being conveyed between plates having conduits of plastic material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/50—Rollable or foldable solar heat collector modules
- F24S20/55—Rollable or foldable solar heat collector modules made of flexible materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
- F24S60/30—Arrangements for storing heat collected by solar heat collectors storing heat in liquids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/50—Elements for transmitting incoming solar rays and preventing outgoing heat radiation; Transparent coverings
- F24S80/52—Elements for transmitting incoming solar rays and preventing outgoing heat radiation; Transparent coverings characterised by the material
- F24S80/525—Elements for transmitting incoming solar rays and preventing outgoing heat radiation; Transparent coverings characterised by the material made of plastics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/04—Solar heat collectors specially adapted for particular uses or environments for showers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/50—Elements for transmitting incoming solar rays and preventing outgoing heat radiation; Transparent coverings
- F24S80/56—Elements for transmitting incoming solar rays and preventing outgoing heat radiation; Transparent coverings characterised by means for preventing heat loss
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
Definitions
- the present invention relates to the field of liquid heating, and more specifically to the use of solar energy to pasteurize water.
- Existing batch solar water heaters generally comprise a vessel made of glass, metallic or polymeric material that can contain water and may further be constructed of an energy absorbent colored material.
- Disadvantages of present designs include the fact that many are bulky and made of expensive materials, and still others are inefficient at recruiting, transferring and adequately storing sufficient heat to achieve temperatures adequate to achieve pasteurization.
- many of the current designs are not capable of achieving temperatures required for pasteurizing water.
- feces e.g., human and animal feces
- polluted water which people use for drinking or washing.
- people drink the live microbes they can multiply, cause disease, and be shed in feces into water, continuing the cycle of disease transmission.
- the present invention overcomes many of the problems in the art by providing a simple, inexpensive and portable apparatus for heating and pasteurizing liquids, as well as methods using same.
- the simple and portable design is useful for providing a renewable supply of drinking water.
- the invention apparatus is relatively inexpensive to manufacture, is trouble-free and reliable in use, and may be readily collapsed and folded for storage or transport.
- the invention is embodied in a solar water heater having a container, at least one energy converting structure for collecting solar energy and imparting it to water within the container, and sufficient insulation to minimize heat loss to surfaces that may be in contact with the container, thereby enabling one to achieve water temperatures of at least 60° C.
- Solar water heaters according to the present invention are thus capable of pasteurizing water by heating the liquid contained therein to temperatures of at least 60° C.
- Invention apparatus includes a water tight transparent container for the liquid to be pasteurized, and at least one energy converting structure for collecting solar energy, converting the solar energy into heat, and transmitting the heat to the liquid in the container.
- the container may have energy converting structure(s) included as an integral part thereof, or the container may be any water tight transparent container, with at least one energy converting structure introduced therein.
- the water heater may comprise an energy reflective structure to further prevent heat loss to the surrounding environment.
- the container may also comprise a temperature indicator that indicates the temperature or temperature history of water within the container, h this manner the user can readily determine if the temperature and length of time required for pasteurization have been achieved.
- temperature indicators allow the user to monitor the temperature of water in the container and discontinue exposure to irradiation when the water reaches an acceptable temperature.
- invention methods comprise introducing liquid into a water tight transparent container having therein the energy converting structure(s), and exposing the container to a suitable energy source, e.g., sunlight, for a time sufficient to heat the liquid to the desired temperature.
- a suitable energy source e.g., sunlight
- Pasteurization can be achieved by mamtaining the liquid at a specified temperature for a specified time.
- FIG. 1 is a cross-sectional elevation view of one embodiment of an invention solar water heater.
- FIG. 2 is a cross-sectional elevation view of another embodiment of an invention solar water heater.
- FIG. 3 is a cross-sectional elevation view of a yet another embodiment of an invention solar water heater.
- FIG. 4 is a cross-sectional elevation view of a further embodiment of an invention solar water heater.
- Fig. 5 is a cross-sectional elevation view of a still another embodiment of an invention solar water heater.
- Fig. 6 is a cross-sectional elevation view of a yet another embodiment of an invention solar water heater.
- Fig. 7 is a top-surface photograph view of a still another further embodiment of an invention solar water heater.
- Fig. 8 is a bottom-surface photograph view of the embodiment of an invention solar water heater shown in Fig. 7.
- Fig. 9 is a cross-sectional photograph view of the embodiment of an invention solar water heater shown in Fig. 7.
- solar water heaters comprising a water tight resealable container, at least one energy converting structure incorporated within said water heater, and one or more insulating structures sufficient to enable said water heater to achieve water temperatures of at least 60° C.
- solar water heaters comprising a water-tight container, one or more energy converting structures therein, and sufficient insulation to produce water temperatures of at least 60° C.
- solar water heaters comprising a water-tight resealable container, one or more energy converting structures therein, and at least one insulating structure associated with said water heater to reduce energy loss from external surfaces thereof and provide insulation sufficient to enable said water heater to achieve water temperatures of at least 60° C.
- solar water heaters comprising a water-tight container, wherein said container comprises a top and a bottom and at least one resealable opening, one or more energy converting structures therein, and at least one insulating structure to reduce energy loss from external surfaces thereof and provide insulation sufficient to enable said water heater to achieve water temperatures of at least 60° C.
- the water heater may comprise energy reflective surfaces. These surfaces may be associated with said container, and/or associated with said insulating structures. Such reflective surfaces facilitate capture of photons from incident radiation by the pasteurizer, as well as further reducing energy loss and thus enhancing the efficiency of the solar water heater.
- the water heater may further comprise lenses which redirect and/or concentrate incident radiation (e.g., Freznel lenses) so as to enhance the capture of photons from incident radiation by the pasteurizer, thus enhancing the efficiency of the solar water heater.
- incident radiation e.g., Freznel lenses
- Such lenses may be associated with the insulating structures or may be provided as a separate element (e.g., as an overlay or additional layer of the invention assembly.
- Containers contemplated for use in the practice of the present invention include any portable water tight container.
- containers contemplated for use in the practice of the present invention include bags constructed of a flexible material, enclosures of rigid materials (e.g., a bottle, a box, or the like), and the like.
- the containers may be constructed of glass, polymeric materials (e.g., polyesters such as polyethylene terephthalate; polyolefins such as polyethylene and polypropylene; polyamides, polyethers, and the like, as well as combinations of any two or more thereof), and the like. It is presently preferred that the container be constructed of a material suitable for containing potable water, e.g., polyethylene, polypropylene, polyethylene terephthalate, and the like.
- polymeric materials e.g., polyesters such as polyethylene terephthalate; polyolefins such as polyethylene and polypropylene; polyamides, polyethers, and the like, as well as combinations of any two or more thereof
- the container be constructed of a material suitable for containing potable water, e.g., polyethylene, polypropylene, polyethylene terephthalate, and the like.
- a standard transparent polymeric water bottle, or the like may be employed as the water tight container.
- Such containers may either comprise an integral energy converting structure or one may be introduced therein.
- a standard transparent polymeric water bottle, or the like may be converted into a water heater/pasteurizer by introducing an energy converting structure into the container, and adding an insulating structure and/or a solar or reflective cooker outside of the container.
- the container comprises one or more pleated structures (e.g., a bellows, or the like) to provide for expansion of the container upon filling said container with liquid.
- pleated structures e.g., a bellows, or the like
- containers contemplated for use herein can be provided in a variety of shapes to accommodate a variety of spaces where (or uses for which) the container might be stored (or employed), hi addition, invention containers can optionally be equipped with one or more straps (or grommets to which one or more straps can be attached) to facilitate carrying the containers, for example strapped on one's back like a backpack, hanging the container from a tree limb or free-standing pole, carrying on one's head, propping up in any convenient configuration to maximize exposure to incident radiation, or the like.
- straps or grommets to which one or more straps can be attached
- Containers contemplated for use in the practice of the present invention preferably comprise at least one resealable opening for introducing and dispensing liquid.
- Any resealable opening may be employed, including threaded spout and cap combinations, sports-bottle type caps, snap-top spout and cap combinations, filter- containing caps, zippers (e.g., of the ZIPLOCKTM design, or the like), corks, stoppers, stopcocks, and the like, and/or a shower head or a sprayer type attachment (taking care, of course, that the heated water is allowed to cool to no greater than about 55°C prior to use as a shower to prevent scalding). It is presently preferred that the resealable opening be water-tight.
- the opening may comprise an air vent to accommodate expansion of the contents due to heat.
- the water heater may also include a vacuum type lid that enables water to be pump- sprayed out of the container similar to garden sprayers or a water- well pump design.
- polymer or “polymeric” means any material having a polymer structure (e.g., polyolefins (e.g., polyethylene, polypropylene, and the like), polyesters (e.g., polyethylene terephthalate, and the like), polyamides (e.g., nylon, and the like), polyurethanes, and the like, as well as combinations of any two or more thereof) and which is suitable for containing potable water.
- polyolefins e.g., polyethylene, polypropylene, and the like
- polyesters e.g., polyethylene terephthalate, and the like
- polyamides e.g., nylon, and the like
- polyurethanes e.g., polyurethanes
- materials contemplated for use in the preparation of invention containers are materials which inherently have an anti-reflective outer surface (or materials to which such a surface can be applied). This will minimize the amount of incident energy which impacts the invention container, but fails to be captured by the water being treated.
- polymeric materials employed in the practice of the present invention may optionally include stabilizers, UN absorbers, UN inhibitors, and the like. Such additives can enhance the useful life of the invention container and may also increase the efficiency with which invention solar water heaters capture solar energy.
- a polymeric material having a higher softening point or polymeric material modified so as to contain agents which impart a higher softening point to said polymeric material and/or actually reduce light transmission therethrough to reduce the likelihood of overheating the water to be pasteurized (with the potential to compromise the integrity of the vessel).
- a thicker sheet of polymeric material can be used, which is also beneficial in providing a more rugged vessel, especially useful when elevated temperatures are reached.
- energy converting structure means a structure having the ability to convert light energy to heat, and which is compatible for use in contact with potable water. Suitable materials include preferably darkly colored polymer sheeting, colored rigid materials such as polymers, metals, or the like. Presently preferred colors are dark green and/or black due to their ability to absorb light and convert the incident radiation into heat. As those of skill in the art can readily understand, by placing an energy converting structure in contact with water, and exposing the structure to sunlight, the energy converting structure will convert the incident radiation to heat, which will be transmitted from the structure into the water.
- any shape and size energy converting structure may be employed in the practice of the present invention.
- a two-sided panel energy converting structure may be employed.
- collapsible energy converting structures e.g., pleated, accordion-like structures, or the like
- the internal energy converting structure may also be joined to the cap or to an external element of the container which is capable of adjusting the position of the energy converting structure inside the container, or for a mixing or stirring effect.
- the container may further comprise at least one insulating structure, h sulating structures maybe provided at any portion of the container where minimization of heat loss is desired, including the top, bottom and/or sides of the container.
- the insulating structure maybe a separate component that is placed over, around and/or under the container, or the insulating structure may be an integral part of the container, or a combination of integral and separate structures maybe employed.
- any surface on which the invention water heater is placed e.g., the ground
- it is presently preferred that invention containers employ an insulating structure that is coextensive with the bottom of the container.
- the insulating structure if placed on the bottom of the container, also contain an upper surface that comprises an energy reflective structure to redirect potentially escaping energy back into the container. It is presently preferred that the insulating structure, if placed on the top or sides of the container, be transparent to permit the passage of light energy therethrough.
- the insulating structure may comprise materials defining an airspace.
- An insulating airspace may be achieved by any way known to those of skill in the art.
- an additional ply of flexible material may be bonded to the container to create an inflatable air space (having one or more separate chambers).
- the inflatable air space optionally comprises a resealable opening, such as those described herein, for the inflation thereof.
- This configuration has the benefit of requiring minimal space for storage when not in use.
- An additional benefit of this configuration is the ability to use such a container in the deflated state to capture heat by conduction even in the absence of incident radiation.
- the inflatable airspace can be further equipped with a desiccant to minimize clouding (due to the presence of moisture) upon inflation thereof.
- the insulating air space can be preformed so that inflation is not required to achieve the desired insulating effect.
- materials such as bubble wrap can be used to provide the desired insulating air space.
- the airspace can be any of a variety of structures, including those as simple as a mere pillow of air, to more intricate structures such as those provided by insulating o materials such as bubble-wrap (i.e., an insulating surface divided into numerous small pockets of air), inflatable multi-chambered structures, closed-cell foam, open cell foam, styrofoam, THINSULATETM, or other such polymeric insulation materials, or the like, all of which are contemplated for use in the practice of the present invention.
- insulating materials employed in the top surface of 5 the invention pasteurizer should be sufficiently transparent so that radiant energy can pass therethrough.
- Insulating structures contemplated for use in the practice of the present invention can be of almost any shape.
- insulating structures can be employed.
- the insulating o structure is wedge shaped so that it aids in orienting the invention container toward the source of radiation (e.g., the sun).
- the container can be carried on one's back like a backpack, and the insulating structure could be sized to facilitate orienting the container at such an angle that the capture of incident sunlight is 5 maximized, while providing insulation from the heat for the person carrying the bag on their back.
- the insulating structure could be configured so as to facilitate carrying the container on one's head.
- the insulating structure provides both protection to the carrier from exposure to excessive heat from the heated water therein, and stability to the container to facilitate carrying the container.
- the container may further comprise at least one reflective structure capable of redirecting energy towards energy converting structure(s) contained within the water heater. It is contemplated that any inexpensive material capable of reflecting energy can be used.
- a reflective structure could be located on the bottom surface of the water heater either internally or externally.
- a reflective structure could be located at the top surface of the water heater either internally or externally (so as to provide additional collection surface to facilitate capture of incident radiation), h accordance with additional alternate embodiments, the reflective structure may be placed between the container and an insulating structure placed on the bottom surface of the water heater, or the reflective structure may be placed between the container and an insulating structure placed at the top surface of the water heater (so as to provide additional collection surface to facilitate capture of incident radiation), and the like.
- energy reflecting structure means a structure having the ability to reflect potentially escaping energy away from the reflecting structure, and/or the ability to capture additional radiation that would otherwise fall outside the invention structure.
- Suitable materials include colored polymer sheeting, colored rigid materials such as polymers, metals, or the like. A presently preferred color is silver due to its reflective properties.
- energy reflecting structures comprising a flared reflective wrap which can be placed about invention containers. Such a structure maximizes the amount of incident energy which is directed toward the container.
- the reflective structure can be repositioned from time to time to maximize its ability to redirect the incident energy to the container.
- additional components may be included to further enhance the efficiency with which incident radiation is collected.
- one or more battens can be included to constrain the shape of the container upon introduction of water and/or air therein so as to maximize the surface of the water heater which is properly oriented to efficiently capture incident radiation.
- one or more concentrating lenses can be included on at least a portion of the container, or positioned between the container and incident radiation.
- one or more Freznel lenses can be incorporated as part of the insulating layer placed over the top of the water-containing container (e.g., around the edges of the invention pasteurizer to facilitate capture of additional radiation, or covering substantially all of the top surface of the invention pasteurizer).
- one or more Freznel lenses can be employed in association with the invention pasteurizer as a separate add-on feature, e.g., as a ring which surrounds the periphery of the pasteurizer, or as an overlay covering some or all of the top surface of the invention pasteurizer.
- containers contemplated for use in the preparation of mvention water heaters comprise an assembly of two pieces (i.e., first and second sheets) of flexible polymeric material stacked on top of one another and bonded together at or near their perimeters (e.g., to create a bag or an envelope).
- Two piece envelope-type containers may have an energy converting structure introduced therein, or the energy converting structure may be integrated into the container.
- the energy converting structure can be provided as a third piece of flexible polymeric material that is stacked between the first and second sheets and bonded along its perimeter between the first and second sheets. In this manner a three ply envelope is created with one ply comprising an energy converting structure.
- the third sheet i.e., energy converting structure
- the third sheet i.e., energy converting structure
- Liquid circulation can also be accomplished in other manners, for example by bonding the energy converting structure on fewer than all sides of its perimeter, thereby also allowing liquid to flow from one side of the energy converting structure to the other.
- such containers can optionally be equipped with straps, or grommets to which straps can be attached to facilitate handling (and orientation) of the container.
- assemblies comprising stacked first, second and third sheets of a flexible polymeric material, bonded together at or near the perimeters of said sheets to create a three-ply structure, wherein said first and second sheets comprise a water-tight container containing therein said third sheet, and wherein said third sheet is a two-sided panel of an energy converting structure.
- the third sheet may be perforated.
- the assembly further comprises a fourth sheet of flexible polymeric material stacked onto and bonded to said first or second sheet of material along the perimeter thereof, said fourth sheet providing an insulating airspace.
- each of the chambers defined by the sheets further comprise a resealable opening for the introduction of water and air, respectively, therethrough.
- the present assembly is further embodied by the optional addition of a plurality of sheets creating multiple tiers, canals, or the like defining airtight spaces comprising insulating structures.
- the present assembly is still further embodied by the optional addition f a bottom sheet comprising energy reflecting properties.
- Invention solar heaters are particularly useful as pasteurization devices. Contrary to popular belief, it is not necessary to boil water to make it safe to drink. Also it is usually not necessary to distill water to make it safe to drink. Heating water to as little as 65-70° C (149-158° F) for 6 minutes, or to a higher temperature for a shorter time, will kill substantially all germs, viruses, and parasites. All effective time and temperature combinations are contemplated for use in the practice of the present invention. Furthermore, the temperature demands of the pasteurization protocol may be achieved with or without filtration. Optionally, the water may also be filtered or chemically treated as desired to achieve one's purity preference and/or to achieve a liquid product free from certain undesirable contaminants.
- invention water heaters optionally include a temperature indicator (e.g., a thermometer) for indicating the temperature or the temperature history of the liquid within the container portion of invention apparatus and assemblies.
- a temperature indicator e.g., a thermometer
- Any temperature indicator suitable for determining the temperature and/or temperature history of a liquid in a container maybe employed in the practice of the present invention. Easily useable and relatively durable (preferably non-breakable) temperature indicators are presently preferred. Accordingly, in one aspect of the invention, the temperature indicator is a liquid crystal sheet indicator
- LCDs liquid crystal displays
- LCD indicators When LCD indicators are used, they can readily be incorporated in any of a variety of locations within the invention water heaters.
- WAPI water pasteurization indicator
- a WAPI is a plastic (or glass) tube with both ends heated, pinched, and sealed, and with a particular type of soybean fat in one end that melts at 154° F (e.g., the "MYVEROL” 18-06K, available from Eastman Kodak Co., Kingsport, TN 37662).
- the tube itself is buoyant, but is alternatively fastened in place with suitable fastening means, e.g., a washer, or the like, so it sinks to the bottom (coolest) part of the water, with the fat in the high end of the tube.
- the WAPI can be positioned within the cap employed to seal the resealable opening, thereby facilitating introduction and removal thereof from the container.
- the resealable opening itself could be configured so as to receive one or more WAPI's therein, holding the WAPI in place for ease of introduction and removal.
- WAPI's prepared from glass tubes have the advantage of being hermetic, which should provide extended life for the wax therein, while still being relatively durable with respect to the handling to which invention water heater is likely to be subj ected.
- Additional WAPIs contemplated for use in the practice of the present invention include multiple WAPIs, wherein two or more tubes are employed, each containing a component that melts at a different temperature, so that a minimum required temperature may be indicated by the first component, and additional temperatures indicated by the additional component(s).
- Each component employed in this aspect of the invention can be treated to appear a different color, thereby facilitating visual observation thereof.
- the lower melting component has melted, but one or more of the higher melting component(s) has(ve) not, one can more readily establish how long temperature must be maintained to achieve pasteurization.
- all of the indicator materials have melted, then one can confirm that the highest indicated temperature has been achieved, and therefore, less time should be required to achieve pasteurization.
- other WAPIs may also be employed in the practice of the present invention.
- Any fastening means e.g., a nylon string, a bracket within the cap for the container, a slot for receiving the temperature sensing means as part of the energy converting structure, and the like
- Any fastening means is suitable for use in the practice of the present invention, so long as there is some means provided to facilitate manipulation and/or retrieval of the tube without recontaminating the water.
- the tube can be readily reused by flipping it over and attaching the fastening means to the other end of the WAPI after the wax has solidified.
- temperature indicating means can be strategically placed at the interface between the fluid-containing portion and the insulating portion, so as to facilitate determination of the temperatures to which the container has been subjected, thus allowing one to monitor and make sure that the contents of the container are not excessively heated, with attendant safety concerns, durability of the container, and the like.
- invention water heaters may optionally include any one or any combination of various filters including particulate, microbial, and/or odor absorbing charcoal filters. While pasteurization can kill dangerous microorganisms, the process does nothing to improve the taste of water or remove any incipient odors. Use of activated charcoal filters, or the like, will remove unpleasant odors and tastes from water. Accordingly, in another embodiment of the present invention, invention water heaters further comprise an activated charcoal filter, or the like. The filter may be used either inside or outside of the container. In addition, the filter can be associated with the opening of the container so that water can be passed through the filter upon introduction of the water into the container, and/or upon pouring the water out of the container.
- the filter can be mounted to slide into position at the spout of the container when the container is oriented for pouring, and to otherwise rest at a position removed from the spout when the container is in the upright position, hi this manner, water can be introduced into the container without passing through the filter.
- Numerous other means for mounting of a filter are possible and contemplated for use in the practice of the present invention.
- the solar heater may further comprise a shower head in fluid communication with an opening in the container.
- solar heated shower water is provided.
- a further embodiment of the solar heated shower comprises a temperature indicator which monitors the water temperature to avoid temperatures greater than 55° C, at which temperatures scalding injuries are possible.
- Various structures to facilitate ease of use such as hang straps, hooks, and the like, are also contemplated for use in the practice of this and other embodiments of the present invention.
- methods for the pasteurization of liquids comprising introducing energy converting structure(s) and water into a transparent container, and exposing said container to a suitable energy source for a time sufficient to pasteurize said liquid.
- Another method for the pasteurization of water embodied by the present invention comprises introducing energy converting structure(s) and water into a container, surrounding said container with insulating material, and exposing said water heater to a suitable energy source for a time sufficient to pasteurize said water.
- Solar heaters described herein are all contemplated for use in the practice of this embodiment of the invention. Any methods for the pasteurization of water described herein may further comprise the step of surrounding said container and or entire water heater with a solar cooker, or another energy focusing device.
- a suitable energy source means any source of energy that is capable of being converted to heat, and which is compatible for use in contact with potable water.
- the presently preferred energy source is solar energy because of its natural and inexpensive properties.
- Alternative non-natural light and energy sources are also contemplated for use in conjunction with the present invention.
- any combination of natural and/or non-natural energy sources are contemplated for use in the practice of the present invention.
- methods of assembly of solar water heaters comprising stacking first, second and third sheets of a flexible polymeric material, bonding same together at or near the perimeters of said sheets to create a three-ply structure, wherein said first and second sheets comprise a water-tight container containing said third sheet, and wherein said third sheet is an energy converting structure.
- the third sheet may be perforated.
- the method of assembly further comprises stacking a fourth sheet of flexible polymeric material onto and bonding same to said first or second sheet of material along the perimeter thereof (and optionally at various points across the surface thereof), said fourth sheet providing one or more insulating (inflatable and/or sealed) airspaces.
- each of the chambers defined by the sheets further comprise a resealable opening for the introduction of water and air, respectively, therethrough.
- the present method of assembly is further embodied by the optional addition of a plurality of sheets creating multiple tiers, canals, or compartments comprising energy converting structures, adjacent to airtight spaces comprising insulating structures.
- solar water heater kits which can be used with existing transparent containers to render them suitable for pasteurization
- hivention kits comprise at least one energy converting structure, and at least one thermal insulating structure.
- the energy converting structure can be introduced into any suitable container, which is then enclosed within the thermal insulating structure to minimize heat loss therefrom.
- invention kits further comprise one or more particulate, anti-microbial, or charcoal filters.
- Another optional component of invention kits is a temperature indicator for indicating the temperature history of the water contained within said water heater.
- Additional optional components of invention kits include a universally fitting cap, spout, stopcock, sprayer, shower, or sport-cap attachment compatible with said existing container outlet.
- invention kits optionally include a reflective cooker, and/or solar cooker, and/or a focusing device to enhance the ability of the resulting water heater to capture incident energy.
- a reflective cooker and/or solar cooker
- a focusing device to enhance the ability of the resulting water heater to capture incident energy.
- Especially preferred reflective structures contemplated for use herein include the flared, reflective wraps described above which can be wrapped around almost any structure, and will not only reflect radiation that might otherwise escape back into the invention container, but it will also increase the amount of incident energy that will actually be collected and directed at the contents of the container.
- kits which can be used with existing containers to render them suitable for pasteurization, said kits comprising at least one energy converting structure, a reflective cooker, and/or a solar cooker.
- FIG. 1 illustrates a flexible solar water heater with energy converting structure on the bottom surface thereof.
- the solar water heater (100) comprises an insulating air space (103) on the top surface of the heater, a water chamber (109) centrally located within the heater, an energy converting structure (115) located on the internal bottom surface of the water chamber (109), and an insulating foam or inflatable structure (117) located on the bottom surface of the container (100).
- the insulating air space (103) further comprises a plurality of battens (to provide additional support to the insulating airspace and to constrain the top surface of the heater to a relatively flat orientation so as to maximize the capture of incident radiation) and an air opening (105) used to inflate or deflate the insulating air space (103) as needed.
- the container (100) also includes a water tight, resealable water fill opening (111) that allows the centrally located water chamber (109) to be emptied and filled as needed.
- the water fill opening (111) is made resealable through the use of a resealable cap (113) located externally to the container.
- a water pasteurization indicator (WAPI) (119) is placed into the water chamber (109) through the water fill opening (111), and is used to determine the water temperature history, thus indicating whether temperatures required to achieve pasteurization have been attained.
- WAPI water pasteurization indicator
- FIG.2 illustrates a flexible solar water heater with a perforated energy converting structure placed centrally in the water chamber.
- the solar water heater (200) comprises an insulating air space (203) on the top surface of the heater, a water chamber (209) centrally located within the heater, a perforated energy converting structure (215) located in the center of the water chamber (209), and an insulating foam structure (217) located on the bottom surface of the container (200).
- the perforated energy converting structure (215) allows for the free flow of water both above and below structure (215) within the water chamber (209) allowing a mixing effect.
- the bottom surface of the container (200) further includes a reflective structure (221) located either on the internal or external bottom surface of the container (200) or on the upper surface of the insulating foam structure (217) located on the bottom surface of the container (200).
- the insulating air space (203) further comprises an air opening (205) used to inflate or deflate the insulating air space (203) as needed.
- the container (200) also includes a water tight, resealable water fill opening (211) that allows the centrally located water chamber (209) to be emptied and filled as needed.
- the water fill opening (211) is made resealable through the use of a resealable cap (213) located externally to the container.
- a water pasteurization indicator (WAPI) (219) is placed into the water chamber (209) through the water fill opening (211), and is used to determine the water temperature history, thus indicating the completion of the pasteurization process.
- WAPI water pasteurization indicator
- FIG.3 illustrates a rigid solar water heater.
- the solar water heater (300) comprises a transparent resealable container (301), an insulating air space blanket (303) which wraps around the container (301), a water chamber (309) which is the inner compartment of the container (301), an energy converting structure (315) located in the center of the water chamber (309), and optionally an independent insulating foam structure (317) placed below the bottom surface of the container (301).
- the energy converting structure (315) is expansive (i.e., accordian-like), thus allowing a larger surface area structure to be introduced into the container (301) through a relatively small resealable container opening (311).
- the energy converting structure (315) allows for the free flow of water both above and below the structure (315) within the water chamber (309) allowing a mixing effect.
- the bottom surface of the container (301) further includes a reflective structure (321) located on either the internal or external bottom surface of the container (301) (not shown) or on the upper surface of the insulating foam structure (317) placed below the bottom surface of the container (as shown here) (301).
- the insulating air space blanket (303) optionally further comprises an air opening (305) used to inflate or deflate the insulating air space blanket (303) as needed (e.g., such air opening is not necessary if bubble wrap is used as the insulating layer).
- the container (301) also includes a water tight, resealable container opening (311) that allows the centrally located water chamber (309) to be emptied and filled as needed.
- the resealable container opening (311) is made resealable through the use of a resealable cap (313) located externally to the container.
- a water pasteurization indicator (WAPI) (319) is placed into the water chamber (309) through the resealable container opening (311), and is used to determine the water temperature history, thus indicating the completion of the pasteurization process.
- WAPI water pasteurization indicator
- FIG. 4 illustrates a modified flexible solar water heater with energy converting structure on the bottom surface thereof.
- the solar water heater (400) comprises an insulating air space (403) on the top surface of the heater, a water chamber (409) centrally located within the heater, an energy converting structure (415) located on the internal bottom surface of the water chamber (409), an insulating foam structure (417) located on the bottom surface of the container (400) and optional Freznel lenses (423) located at the outer edges of the insulating air space (403).
- the insulating air space (403) comprises a plurality of air filled chambers, and optionally may comprise an air opening (not shown) used to inflate or deflate the insulating air space (403) as needed.
- the container (400) also includes a water tight, resealable water fill opening (411) that allows the centrally located water chamber (409) to be emptied and filled as needed.
- the water fill opening (411) is made resealable through the use of a resealable cap (413) located externally to the container.
- a water pasteurization indicator (WAPI) (419) is placed into the water chamber (409) through the water fill opening (411), and is used to determine the water temperature history, thus indicating whether temperatures required to achieve pasteurization have been attained.
- WAPI water pasteurization indicator
- FIG.5 illustrates a modified flexible solar water heater with a perforated energy converting structure placed centrally in the water chamber.
- the solar water heater (500) comprises an insulating air space (503) on the top surface of the heater, a water chamber (509) centrally located within the heater, a perforated energy converting structure (515) located in the center of the water chamber (509), an insulating foam structure (517) located on the bottom surface of the container (500), and an extended reflective surface (522) or an enclosed transparent top with reflective sides (522A) to facilitate collection of additional incident radiation .
- the perforated energy converting structure (515) allows for the free flow of water both above and below structure (515) within the water chamber (509) allowing a mixing effect.
- the bottom surface of the container (500) may further include an optional reflective structure (521) located either on the internal or external bottom surface of the container (500) or on the upper surface of the insulating foam structure (517) located on the bottom surface of the container (500).
- the insulating air space (503) comprises a plurality of air filled chambers, and optionally may further comprise an air opening (not shown) used to inflate or deflate the insulating air space (503) as needed.
- the container (500) also includes a water tight, resealable water fill opening (511) that allows the centrally located water chamber (509) to be emptied and filled as needed.
- the water fill opening (511) is made resealable through the use of a resealable cap (513) located externally to the container.
- a water pasteurization indicator (WAPI) (519) is placed into the water chamber (509) through the water fill opening (511), and is used to determine the water temperature history, thus indicating the completion of the pasteurization process.
- WAPI water pasteurization indicator
- FIG.6 illustrates a cross-section of a modified rigid solar water heater.
- the solar water heater (600) comprises a transparent resealable water chamber/container (609), a transparent multi-chambered insulating air space blanket (603) which wraps around the water chamber/container (609), an energy converting structure (615) located near the inner walls of the water chamber/container (609).
- the energy convertmg structure (615) is introduced through the chamber/container opening (not shown) and expands circular about the round chamber, and may over-lap or gap depending on the length of energy converting structure (615) used.
- the insulating air space blanket (603) may further comprise an air opening (not shown) used to inflate or deflate the insulating air space blanket (603) as needed.
- the water chamber/container (609) also includes a water tight, resealable container opening (not shown) that allows the centrally located water chamber/container (609) to be emptied and filled as needed.
- FIG. 7 represents a top view photograph of a modified flexible solar 5 water heater with energy converting structure on the bottom surface thereof.
- the solar water heater (700) comprises an insulating air space (703) on the top surface of the heater, a handle (731), a reinforcement rod (733), and grommets (735) useful for facilitating ease of transport of said solar water heater (700).
- FIG. 8 represents a bottom view photograph of the modified flexible solar water heater with energy o converting structure on the bottom surface thereof.
- the solar water heater (700) comprises a water fill opening with a resealable cap (713) on the bottom surface (727) of the heater that allows the centrally located water chamber (not shown) to be emptied and filled as needed.
- the solar water heater (700) further comprises a handle (731), a reinforcement rod (733), and grommets (735) useful for facilitating ease of 5 transport of said solar water heater (700).
- FIG. 9 represents a cross-sectional view photograph of the modified flexible solar water heater with energy converting structure on the bottom surface thereof.
- the solar water heater (700) comprises an insulating air space (703) on the top surface of the heater, a water chamber (709) centrally located within the heater, an energy converting structure (715) located on the o internal bottom surface of the water chamber (709), and an insulating foam structure or inflatable airspace (717) located between the bottom surface (727) of the container (700) and the bottom surface of the water chamber (709).
- the insulating air space (703) comprises a plurality of gas filled chambers and may optionally comprise an air valve (not shown) used to inflate or deflate the insulating air space (703) as needed.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Devices For Dispensing Beverages (AREA)
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
APAP/P/2003/002858A AP1651A (en) | 2001-02-16 | 2002-01-04 | Solar water heater and pasteurizer. |
MXPA03006888A MXPA03006888A (en) | 2001-02-16 | 2002-01-04 | Solar water heater and pasteurizer. |
BRPI0207228-9A BR0207228B1 (en) | 2001-02-16 | 2002-01-04 | solar water pasteurizer and method for mounting it. |
AU2002306398A AU2002306398B2 (en) | 2001-02-16 | 2002-01-04 | Solar water heater and pasteurizer |
ZA2003/06077A ZA200306077B (en) | 2001-02-16 | 2003-08-06 | Solar water heater and pasteurizer |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US78833601A | 2001-02-16 | 2001-02-16 | |
US09/788,336 | 2001-02-16 | ||
US29967201P | 2001-06-19 | 2001-06-19 | |
US60/299,572 | 2001-06-19 |
Publications (3)
Publication Number | Publication Date |
---|---|
WO2002066905A2 true WO2002066905A2 (en) | 2002-08-29 |
WO2002066905A3 WO2002066905A3 (en) | 2003-05-08 |
WO2002066905A9 WO2002066905A9 (en) | 2004-04-01 |
Family
ID=26971335
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2002/000091 WO2002066905A2 (en) | 2001-02-16 | 2002-01-04 | Solar water heater and pasteurizer |
Country Status (1)
Country | Link |
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WO (1) | WO2002066905A2 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1814602A1 (en) * | 2004-12-02 | 2007-08-08 | Petra Wadström | Container for purifying water by utilization of sunlight |
US20110011808A1 (en) * | 2001-02-16 | 2011-01-20 | Husson Jr Frank D | Solar water pasteurizer |
US8292100B2 (en) | 2010-05-14 | 2012-10-23 | Aquasolix Corporation | Method and apparatus for solar-based water disinfection |
US20120279927A1 (en) * | 2001-02-16 | 2012-11-08 | Husson Jr Frank D | Solar water pasteurizer |
EP2595923A2 (en) * | 2010-07-23 | 2013-05-29 | UV Cleaning Systems, Inc. | Solar-activated photochemical purification of fluids |
CN104676730A (en) * | 2015-03-13 | 2015-06-03 | 董振刚 | Pasteurization-based sterilization constant-temperature water heating equipment |
US10801754B2 (en) | 2016-01-04 | 2020-10-13 | Uniqan Oy | Product for heating |
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US10801754B2 (en) | 2016-01-04 | 2020-10-13 | Uniqan Oy | Product for heating |
Also Published As
Publication number | Publication date |
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WO2002066905A3 (en) | 2003-05-08 |
WO2002066905A9 (en) | 2004-04-01 |
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