WO2005061969A1 - Procede de chauffage d'eau solaire - Google Patents

Procede de chauffage d'eau solaire Download PDF

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Publication number
WO2005061969A1
WO2005061969A1 PCT/AU2004/001812 AU2004001812W WO2005061969A1 WO 2005061969 A1 WO2005061969 A1 WO 2005061969A1 AU 2004001812 W AU2004001812 W AU 2004001812W WO 2005061969 A1 WO2005061969 A1 WO 2005061969A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
predetermined
sanitation
heating
sanitising
Prior art date
Application number
PCT/AU2004/001812
Other languages
English (en)
Inventor
Brendan Bourke
Original Assignee
Rheem Australia Pty Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2003907145A external-priority patent/AU2003907145A0/en
Application filed by Rheem Australia Pty Limited filed Critical Rheem Australia Pty Limited
Priority to NZ546849A priority Critical patent/NZ546849A/en
Priority to AU2004303898A priority patent/AU2004303898B2/en
Publication of WO2005061969A1 publication Critical patent/WO2005061969A1/fr

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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
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/0036—Domestic hot-water supply systems with combination of different kinds of heating means
    • F24D17/0063—Domestic hot-water supply systems with combination of different kinds of heating means solar energy and conventional heaters
    • F24D17/0068—Domestic hot-water supply systems with combination of different kinds of heating means solar energy and conventional heaters with accumulation of the heated water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S50/00—Arrangements for controlling solar heat collectors
    • F24S50/40—Arrangements for controlling solar heat collectors responsive to temperature
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S90/00—Solar heat systems not otherwise provided for
    • F24S90/10—Solar heat systems not otherwise provided for using thermosiphonic circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/20—Safety or protection arrangements; Arrangements for preventing malfunction for preventing development of microorganisms
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • 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

Definitions

  • This invention relates to a process and system for sanitising water in a solar water heating system.
  • the present invention provides a water sanitising process to be performed in a water heating system which includes: a water storage means, a solar water heater for heating water in the storage means, and a supplementary water heater for heating the water, the system having a sanitation mode of operation whereby when the system determines that a predetermined heating condition is met, the water is subjected to heating by the supplementary water heater, the process including the sanitation initiation steps of: determining a time period Pw that has passed since the water last satisfied a predetermined sanitation-satisfaction criterion of the system; then comparing Pw with a predetermined maximum allowable period Pw.max; then if Pw is equal to or greater than Pw.max, placing the system in the sanitation mode of operation; then determining whether the predetermined heating condition is met; and then if the predetermined heating condition is met, subjecting the water to heating by the supplementary water heater.
  • the sanitation-satisfaction criterion can be that heating of the water, that has been effected by the supplementary water heater, is terminated. Then, the termination of the heating of the water can be effected by the deactivation of the supplementary water heater.
  • the sanitation-satisfaction criterion can be that said water heating system is activated.
  • a first said predetermined heating condition can be where the temperature Tw of the water is less than a predetermined minimum sanitation temperature Ts.min, the process including the steps, of: determining Tw; then comparing Tw with Ts.min; then if Tw is less than Ts.min, determining that the first predetermined heating condition is satisfied; and then if it is determined that the first predetermined heating condition is satisfied, subjecting the water to heating by the supplementary water heater.
  • a second said predetermined heating condition can be where Tw is greater than or equal to Ts.min and where Tw has been greater than or equal to Ts.min for a time period Ps which is less than a predetermined minimum sanitation time period Ps.min, the process including the steps, after the step of comparing Tw with Ts.min, and if Tw is equal to or greater than Ts.min, of: comparing Ps with Ps.min; then if Ps is less than Ps.min, determining that the second predetermined heating condition is satisfied; and then if it is determined that the second predetermined heating condition is satisfied, subjecting the water to heating by the supplementary water heater.
  • the step of placing the system in the sanitation mode of operation can include the step of setting Ps to zero.
  • the step of placing the system in the sanitation mode of operation can include activating the supplementary water heater.
  • the water sanitising process can includes the further sanitation initiation steps, after the step of comparing Pw with the predetermined maximum allowable period Pw.max, and if Pw is less than Pw.max, of: determining whether the water satisfies a predetermined test parameter; and then if the water satisfies the predetermined test parameter, placing the system in the sanitation mode of operation.
  • the predetermined test parameter can include that Pw is greater than a first predetermined proportion of Pw.max and that Tw is equal to or greater than a first predetermined test temperature. Then, preferably, the first predetermined proportion of Pw.max is substantially two-thirds of Pw.max and the first predetermined test temperature is substantially 35 oC.
  • the test parameter can further include that Pw is equal to or less than the first predete ⁇ nined proportion, that Pw is greater than a second predetermined proportion of Pw.max and that Tw is equal to or greater than a second predetermined test temperature. Then, preferably, the second predetermined proportion of Pw.max is substantially one-third of Pw.max and the second predetermined test temperature is substantially 45 oC.
  • the test parameter further can include that Pw is equal to or less than the second predetermined proportion, that Pw is less than a third predetermined proportion of Pw.max, and that Tw is equal to or greater than a third predetermined test temperature.
  • the third predetermined proportion of Pw.max is equal to the second predetermined proportion and the third predetermined test temperature is substantially 55oC
  • the third predetermined proportion of Pw.max is substantially one-third of Pw.max and the third predetermined test temperature is substantially 55 oC.
  • the test parameter can further include that Pw is equal to or less than the first predetermined proportion, that Pw is equal to or less than a plurality of further predetermined proportions of Pw.max, that Pw is greater than a yet further predetermined proportion of Pw.max and that Tw is equal to or greater than a further predetermined test temperature corresponding to said yet further predetermined proportion.
  • the ⁇ vater sanitising process can include the sanitation initiation step, after the step of determining whether the water satisfies the predetermined test parameter, and if the water does not satisfy the predetermined test parameter, of repeating the sanitation initiation steps.
  • the water sanitising process can include the step of exiting the sanitation mode of operation, if the system is in the sanitation mode of operation, after the step of determining whether the predetermined heating condition is met, and if the predetermined heating condition is not met.
  • the step of exiting the sanitation mode of operation can include deactivating the supplementary water heater.
  • the predetermined sanitation-satisfaction criterion can satisfied substantially when the step of deactivating the supplementary water heater is carried out.
  • the process can include the step, when the predetermined sanitation-satisfaction criterion of the system is satisfied, of setting Pw to zero.
  • the present invention also provides a water heating system including: a solar water heater having a collector, a tank and a heat exchanger to heat water in said tank with heat derived from solar energy; a heating means in said tank; and a sanitising control system connected to said heating means, the control system being configured to effect a sanitising process in which the water is heated by the heating means to a sanitising temperature and maintained at said sanitising temperature for a predetermined sanitising period if said control system detects that a predetermined time period has elapsed since the water heating system was switched on or since the water was last maintained at said sanitising temperature for said predetermined sanitising period.
  • the water heating system can include an instantaneous water heater configured for receiving water from said tank so as to heat the water from said tank to a desired temperature if said water is below the desired temperature.
  • said instantaneous water heater is a gas heater or an electric heater.
  • the heating means can be a heat exchanger which transfers heat to said water from combustion gases.
  • said heating means is an electric element.
  • the sanitising process can be the process described in paragraph [002] above.
  • Figure 1 is is a schematic perspective view of a first water heating system for carrying out a process according to an embodiment of the invention
  • Figure 2 is a schematic perspective view of an alternative water heating system
  • Figure 3 is a block diagram representing a solar ⁇ vater heating control process.
  • FIG. 1 there is shown a first water heating system 10 which includes sloping solar water heating panels 12, a solar heater water storage tank 14 and an instantaneous gas water heater 16.
  • the panels 12 have tubes 18 which are interconnected at a lower end by header pipes 20 and at an upper end by header pipes 22.
  • the header pipes 20 are interconnected to each other, and are connected to the tank 14 by a pipe 26.
  • the header pipes 22 are also interconnected to each other, and are connected to the tank 14 by a pipe 24.
  • a further pipe 28 leads from the tank 14 to the water heater 16.
  • the water heater 16 is connected to further piping (not shown) leading to locations where water in the system 10 will ultimately be used, such as domestic taps.
  • a supplementary electric water heating element 30 disposed within the tank 14.
  • the system 10 is controlled by a system controller 32 (shown diagrammatically in Figure 1).
  • the system 10 is configured to operate as a thermosiphon system in which the panels 12 are oriented at an angle, with the header pipes 20 being disposed at a lower end as foreshadowed above, and the header pipes 22 being disposed at an upper end also as foreshadowed above. It will be appreciated that the tank
  • the 14 can be heated by a heat exchanger (not shown) arranged inside or outside the tank 14, with the heat exchanger being in fluid communication with the panels 12, whereby a heat transfer fluid is supplied to absorb heat from the panels 12 and to transfer that heat to the water in the tank 14.
  • the heat transfer fluid can circulate by thermosiphoning means, or a pump can be present in the heat transfer fluid circuit to circulate the heat transfer fluid therein.
  • the system 40 shown includes a pair of solar panels
  • the system 40 also includes a water tank 50 and a gas powered water heater
  • the header pipes 46 are interconnected to each other, and to a pipe 54 which leads to a port of a pump 56 which is at a position near to the lower end of the tank 50.
  • the header pipes 48 are interconnected to each other and are connected to a pipe 58 which leads to another port of the pump 56.
  • a third port of the pump opens into the tank 50 at 57.
  • a further pipe 60 leads from a position near the upper end of the tank 50 to the gas heater 52.
  • piping leads from the gas heater 52 to positions where a user may use water from the system 40, such as domestic taps.
  • the system 40 is also provided with a supplementary electric water element 62 in the tank 50.
  • the system 40 can be provided with a heat exchanger similar to that referred to above in relation to the system 10, which is arranged inside or outside the tank 50, with the heat exchanger being in fluid communication with the panels 42, whereby a heat transfer fluid is supplied to absorb heat from the panels 42 and to transfer that heat to the water in the tank 50.
  • the heat transfer fluid can circulate by thermosiphoning means, or a pump can be present in the heat transfer fluid circuit to circulate the heat transfer fluid therein.
  • the system 40 also includes a controller 64 similar to the controller 32 of the system 10.
  • the controllers 32 and 64 operate so as to effect a sanitising process in which the water in the respective tank 14 or 50 is heated by the supplementary electric element 30 or 62 to a sanitising temperature, and maintained at the sanitising temperature for a predetermined sanitising period, if a certain condition is met.
  • This condition is that the controller 32 or 64 detects that a predetermined time period has elapsed since the water heating system 10 or 40 was switched on, or since the water was last maintained at the sanitising temperature for the predetermined sanitising period.
  • control process generally designated 70, represented by the block diagram of Figure 3. Although the process 70 is described below in relation to both the systems 10 and 40, it is to be understood that the process 70 applies respectively (separately) to the systems 10 or 40.
  • the process 70 is for determining whether water in the systems 10 or
  • these sanitation modes of operation are for sanitising water in the systems 10 or 40, for the purpose of killing organisms such as the legionella bacteria.
  • FIG. 3 In the block diagram of Figure 3 there are shown diamond shaped blocks and rectangular blocks.
  • the diamond shaped blocks represent determinations to be made (that is, questions to be answered) by the respective controller 32 or 64.
  • the point at which the controller 32 or 64 arrives at the determination to be made is represented by the vertical line joining the relevant diamond shaped block. If the answer to the relevant question represented by the block is a "yes" answer, then the progress of the process 70 is represented by the line extending to the right of the respective block. If the answer is a "no" answer, then the process 70 continues as represented by the line extending to the left of the respective block.
  • the process 70 can be considered as starting at, and proceeding from, the position 73 on line 72.
  • the first question arrived at by the process 70 is represented by the block 74 and is as follows: Is the relevant supplementary electric element 30 or 64 in an activated state? The answer at the start of the process 70, as mentioned above, is "no". Therefore the process 70 proceeds to the left along the line 76 to the next question, represented by the block 78.
  • This question is: Is the time period Pw that has passed, since the water in the system 10 or 40 last complied with that system's so-called sanitation-satisfaction criteria, greater or equal to the maximum allowable time period Pw.max.
  • Pw.max is the time period, either set by water regulatory authorities or by scientific studies, as the maximum period the water can stand before it requires sanitation. This, typically, can be 30 days or any appropriate length of time. [056] If the time period Pw that has passed is greater or equal to the maximum allowable time period Pw.max, then the process 70 proceeds along the line 80 to the block 82.
  • the block 82 represents the steps of activating the supplementary electric element 30 or 62.
  • the block 82 also represents the step of setting to zero a time period Ps which represents the period of time for which the water in the system 10 or 40 has exceeded a temperature required for sanitation to be carried out, that is, the so-called minimum sanitation temperature Ts.min of the respective system, as described in more detail below.
  • the step represented by the block 82 also represents the point at which the system 10 or 40 enters its so-called sanitation mode of operation, which is essentially the mode that the system 10 or 40 is in when its supplementary electric element 30 or 62 is activated or energised.
  • the process 70 continues along the line 84 which, as can be seen, joins up with the line 72. Accordingly, the question represented by the block 74 is again asked as part of the process 70. As the supplementary electric element 30 or 62 has just been activated as represented by the block 82, the answer to the question represented by the block 74 will now be "yes", so that the process 70 will now continue to the right, along the line 86.
  • the line 86 leads to a further question represented by the block 88, which is: is the temperature Tw of the water in the system 10 or 40 equal to or greater than the above-mentioned predetermined minimum sanitation temperature Ts.min? In the preferred embodiment, Ts.min is 60°C.
  • the process 70 will proceed to the left along the line 90 to the step represented by the block 92.
  • the step represented by the block 92 is to once again set Ps, being the time period for which the temperature Tw of the water has equalled or exceeded the minimum sanitation temperature Ts.min, to zero. This is because the temperature Tw indeed does not equal or exceed Ts.min.
  • the supplementary electric element 30 or 62 is in an activated condition so that the water is continually being heated by this element so that ultimately, after sufficient such cycles, the temperature Tw of the water will equal or exceed the minimum sanitation temperature Ts.min.
  • the answer to the question represented by the block 88 will be "yes" so that the process 70 will proceed to the right as represented by the line 98 to the question represented by the block 100.
  • Ps being the time period for which the temperature Tw of the water has exceeded Ts.min
  • Ps.min a particular predetermined minimum time period for successful sanitation
  • the question, as represented by the block 100, is based on the requirement that, for the water to be successfully sanitised, its temperature Tw must not merely equal or exceed Ts.min, but must have so equalled or exceeded it for a minimum period of Ps.min.
  • the supplementary electric element 30 or 62 is in an activated condition so that the process 70 again proceeds to the right as represented by the line 86. Accordingly, in this event, it will be appreciated that the water is still being subjected to heating by the supplementary water element 30 or 62 with the process 70 still being in the sanitation mode of operation of the system 10 or 40.
  • step as represented by the block 106 is to deactivate the supplementary electric element 30 or 62 and also to set to zero Pw which, as described above, is the time period since the water in the system 10 or 40 last complied with the relevant sanitation-satisfaction criterion.
  • the sanitation-satisfaction criterion is, in effect, the point at which sanitation of the water has been successfully completed, which is represented by the step of deactivating the supplementary electric element 30 or 62 as represented by the block 106.
  • the deactivating of the supplementary electric element 30 or 62 not only represents the sanitation-satisfaction criterion being complied with, but also represents the system 10 or 40 being removed from (ie. exiting) its sanitation mode of operation.
  • the process 70 continues as represented by the lines 96, 84 and 72, to once again arrive at the question represented by the block 74.
  • the answer to the question represented by the block 74 is once again "no", so that the process 70 proceeds to the left as represented by the line 76 to the question represented by the block 78.
  • the question represented by the block 78 is whether the time period Pw, being the period since the water last complied with the sanitation-satisfaction criterion, equals or exceeds a maximum predetermined time period Pw.max. It will be recalled that when Pw did exceed Pw.max, this marked the point at which the process 70 entered the sanitation mode of operation of the system 10 or 40. In the present stage of the process 70, as the step represented by the block 106 (that is, deactivating the supplementary electric element 30 or 62 and setting Pw to zero) has only just occurred, the time period Pw will not yet equal or exceed the maximum allowable time period Pw.max, so that the answer to the question represented by the block 78 will be "no".
  • the first such criterion is the question represented by the block 110. This is the question as to whether the time period Pw exceeds a first predetermined proportion, being two thirds, of Pw.max. If the answer to that question is "yes", then the process 70 continues to the right as represented by the line 112, to the further question represented by the block 114. This question is whether the temperature Tw of the water is equal to or exceeds a first test temperature, being 35°C. If the water satisfies these criteria (that is, if the answer to the questions represented by the blocks 110 and 114 are both "yes"), then the process 70 proceeds as represented by the lines 116 and 80, to the step represented by the block 82, followed by the lines 84 and 72. As the step represented by the block 82 involves activating the supplementary element 30 or 62, the carrying out of this step at this stage therefore also involves the system 10 or 40 again entering its sanitation mode of operation, as described above.
  • the process 70 proceeds to the left as represented by the line 118, followed by the line 84, and then the line 72, to once again arrive at the question represented by the block 74.
  • the step represented by the block 82 that is, the activating of the supplementary electric element 30 or 62, will be circumvented so that, when the question represented by the block 74 is arrived at, the supplementary electric element will be in a deactivated state.
  • the answer to that question will be "no”
  • the process 70 will again proceed to the left as represented by the line 76 to the question represented by the block 78.
  • This question is whether the time period Pw exceeds a second predetermined proportion, being one third, of Pw.max, in ⁇ vhich event the process 70 proceeds to the right as represented by the line 124, to the question represented by the block 126. [077] This is the question as to whether the temperature Tw of the water is equal to or exceeds a second test temperature, being 45°C. If the answer to the questions represented by the blocks 122 and 126 are both "yes", then the process 70 proceeds as represented by the line 128 followed again by the line 80 to the step represented by the block 82, and then as represented by the lines 84 and 72, to the question represented by the block 74. The carrying out of the step represented by the block 82, in this case, again marks the point at which the system 10 or 40 enters its sanitation mode of operation.
  • the question represented by the block 138 is whether the temperature Tw of the water equals or exceeds a third test temperature, being 55°C. If the answer to this question is "yes", then the process 70 proceeds to the right as represented by the line 140, followed by the line 80, to the step represented by the block 82, which is to activate the supplementary electric element 30 or 62, and to set Ps to zero, and then to proceed as represented by the lines 84 and 72 to the question represented by the block 74.
  • the process 70 proceeds as represented by the line 144 followed by the line 118 and then the lines 84 and 72 to the question represented by the block 74.
  • the step represented by the block 82 that is, activating the supplementary electric element 30 or 62
  • the process 70 will proceed to the left as represented by the line 76 to the question represented by the block 78.
  • the block diagram of Figure 3 represents two identifiable areas.
  • the first area is represented by the blocks 78, 110, 114, 122, 126, 142 and 138, which is that part of the process 70 which determines whether or not the sanitation mode of operation of the system 10 or 40 is to be entered.
  • the second area of the block diagram is represented by the blocks 88, 92, 100 and 106, being the part of the process 70 within the sanitation mode of operation of the system 10 or 40, and which is adapted for determining whether the process 70 is to remain in this sanitation mode of operation, or to exit the sanitation mode of operation.
  • the embodiments thus provide the means to monitor a solar water heating system and to sanitise the water. This is achieved, first, by monitoring the system to determine whether a sufficient period of time has elapsed for there to be significant risk of undesirable organisms, such as legionella bacteria, to have developed in the continually warm conditions resulting from the solar nature of the system. Then, the water is subjected to the type of heating conditions that are suitable for killing such organisms. At the same time, the system is adapted to make use of at least some of the heat provided by the solar features of the system itself (such as the solar heat-absorbing panels), so that the added heat energy required to effect sanitising is less than it would be in the absence of the solar features.
  • control associated with these two areas might be carried out separately, with means for communicating with each other so that the system "knows” whether and when to switch from one control process to the other, that is, ⁇ vhen the sanitation mode of operation is entered or exited.
  • the system can be adapted so as not to enter the sanitation mode of operation at all in cases where the nature of heating provided by the solar features themselves are sufficient to achieve suitable sanitation of the water.
  • a case may be where there are hot sunny weather conditions which are suitable for maintaining the water at a temperature equal to or exceeding Tw.max for a period equal to or exceeding Pw.max.
  • the process embodiment represented in Figure 3 is configured to enter the sanitation mode of operation when certain specific relationships exist between elapsed time and water temperature (eg. Pw being greater than two-thirds of Pw.max and Tw being equal to or greater than 35°C).
  • three such relationship are provided, as represented by the blocks 110 and 114, 122 and 126, and 134 and 138, each being conditional on the preceding relationship.
  • further such relationships i.e "levels" of interrogation
  • each such relationship may be a relationship between elapsed time (in the sense of a predetermined proportion of Pw.max) and a corresponding temperature.
  • each such relationship will constitute a further level of interrogation, whereby, if the parameters of a particular relationship are satisfied, the process will enter the sanitation mode of operation.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

L'invention porte sur un procédé de désinfection de l'eau qui s'effectue dans un système de chauffage d'eau (40) comprenant : des moyens de stockage de l'eau (50), un dispositif de chauffage d'eau solaire (42) qui chauffe l'eau dans les moyens de stockage (50), et un dispositif de chauffage d'eau supplémentaire (52) destiné à chauffer l'eau, le système de l'invention comprenant une mode de fonctionnement de désinfection selon lequel, lorsque le système a déterminé qu'un état de chauffage prédéterminé a été atteint, l'eau est soumise au chauffage par le dispositif de chauffage d'eau supplémentaire (52), le procédé comprenant les étapes suivantes de démarrage de la désinfection : on détermine qu'une période de temps Pw s'est écoulée depuis que l'eau a répondu pour la dernière fois à un critère de désinfection prédéterminé devant être satisfait ; on compare alors Pw avec la période admissible maximale prédéterminée Pw.max; si Pw est supérieur ou égal à Pw.max, on place le système en mode de fonctionnement de désinfection ; on détermine alors si l'état de chauffage prédéterminé est atteint ; et si l'état de chauffage prédéterminé est atteint, on soumet l'eau au chauffage par le dispositif de chauffage d'eau supplémentaire.
PCT/AU2004/001812 2003-12-23 2004-12-22 Procede de chauffage d'eau solaire WO2005061969A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NZ546849A NZ546849A (en) 2003-12-23 2004-12-22 A water heater and water sanitizing process
AU2004303898A AU2004303898B2 (en) 2003-12-23 2004-12-22 Solar water heating process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2003907145 2003-12-23
AU2003907145A AU2003907145A0 (en) 2003-12-23 Solar Water Heating Sanitation Process

Publications (1)

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WO2005061969A1 true WO2005061969A1 (fr) 2005-07-07

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WO (1) WO2005061969A1 (fr)

Cited By (10)

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EP1735569A1 (fr) 2004-03-15 2006-12-27 Zip Industries (Aust) Pty Ltd Chauffe-eau et procede de commande de celui-ci
WO2007098561A1 (fr) * 2006-03-02 2007-09-07 Dux Manufacturing Limited Procédé et dispositifs d'exploitation de systèmes de fourniture d'eau chaude
US7982164B2 (en) 2007-11-09 2011-07-19 Calentadores De America, S.A: De C.V. Water heater with ionized ignition and electronic control of temperature
US7985943B2 (en) 2007-11-09 2011-07-26 Calentadores De America, S.A: De C.V. Water heater of endorsement with ionized ignition and electronic control of temperature, for solar heaters of the type thermosiphon
EP2564124A1 (fr) * 2010-04-26 2013-03-06 W&E International (Canada) Corp. Réservoir et système de stockage et de chauffage de fluide à auto-circulation entraîné par la chaleur
US8485178B2 (en) 2007-11-09 2013-07-16 Calentadores De America, S.A: De C.V. Solar water heating system with a backup water heater, and electronic temperature control for a backup heater in a forced circulation solar water heating system
EP2673571A4 (fr) * 2011-02-08 2015-08-05 Trathom Corp Système de captage d'énergie solaire thermique à protection contre la surchauffe et dérivation de température froide
AU2012216633B2 (en) * 2006-03-02 2015-11-12 Dux Manufacturing Limited Methods and apparatuses for operating hot water systems
DE102016118131A1 (de) 2016-08-24 2018-03-01 Deutsches Zentrum für Luft- und Raumfahrt e.V. Verfahren zum Steuern und/oder Regeln eines solarthermischen Kraftwerks und solarthermisches Kraftwerk
CN108362019A (zh) * 2018-04-02 2018-08-03 广州西奥多科技有限公司 一种太空能热水器控制系统及控制方法

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Cited By (13)

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Publication number Priority date Publication date Assignee Title
EP1735569A1 (fr) 2004-03-15 2006-12-27 Zip Industries (Aust) Pty Ltd Chauffe-eau et procede de commande de celui-ci
AU2007219645B2 (en) * 2006-03-02 2012-03-15 Dux Manufacturing Limited Methods and apparatuses for operating hot water systems
WO2007098561A1 (fr) * 2006-03-02 2007-09-07 Dux Manufacturing Limited Procédé et dispositifs d'exploitation de systèmes de fourniture d'eau chaude
AU2012216633B2 (en) * 2006-03-02 2015-11-12 Dux Manufacturing Limited Methods and apparatuses for operating hot water systems
US7985943B2 (en) 2007-11-09 2011-07-26 Calentadores De America, S.A: De C.V. Water heater of endorsement with ionized ignition and electronic control of temperature, for solar heaters of the type thermosiphon
US8485178B2 (en) 2007-11-09 2013-07-16 Calentadores De America, S.A: De C.V. Solar water heating system with a backup water heater, and electronic temperature control for a backup heater in a forced circulation solar water heating system
US7982164B2 (en) 2007-11-09 2011-07-19 Calentadores De America, S.A: De C.V. Water heater with ionized ignition and electronic control of temperature
EP2564124A1 (fr) * 2010-04-26 2013-03-06 W&E International (Canada) Corp. Réservoir et système de stockage et de chauffage de fluide à auto-circulation entraîné par la chaleur
EP2564124A4 (fr) * 2010-04-26 2014-09-24 W & E Int Canada Corp Réservoir et système de stockage et de chauffage de fluide à auto-circulation entraîné par la chaleur
EP2673571A4 (fr) * 2011-02-08 2015-08-05 Trathom Corp Système de captage d'énergie solaire thermique à protection contre la surchauffe et dérivation de température froide
DE102016118131A1 (de) 2016-08-24 2018-03-01 Deutsches Zentrum für Luft- und Raumfahrt e.V. Verfahren zum Steuern und/oder Regeln eines solarthermischen Kraftwerks und solarthermisches Kraftwerk
CN108362019A (zh) * 2018-04-02 2018-08-03 广州西奥多科技有限公司 一种太空能热水器控制系统及控制方法
CN108362019B (zh) * 2018-04-02 2020-02-18 广州西奥多科技有限公司 一种太空能热水器控制方法

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