Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
  • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
  • F24H1/18—Water-storage heaters
  • F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
  • F24H1/205—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes with furnace tubes
  • F24H1/206—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes with furnace tubes with submerged combustion chamber

Definitions

• the present invention is related to a heat storage or a boiler with storage.
• Water in tanks or storages have been used to accumulate energy. Such storages often are used in connection with boilers or kettles heated with wood, solar heating systems, heat pumps etc. and to utilize the electric tariffs in the best possible way. Accumulators store energy from the time the energy is available, until the time the energy is utilized.
• Such accumulating tanks may be provided as closed systems having expansion tanks or as open systems with open possibility of expansion.
• the tanks further physicly may be constructed with circular or rectangular cross sections.
• accumulator tanks are used for general heating of buildings and also for provision of heated consumption water.
• Today such accumulator tanks frequently are used in connection with central kettles for heating with wood, sun heating and accumulation of electric energy. Typical for this is the use of modern kettles for wood, used for heating where the efficiency of the kettle is larger than the need of energy from the building.
• Correspondingly accumulator tanks are used for 5 storing energy transformed from electric energy.
• the kettle is connected with a water storage having sufficient s volume so that the kettle may be maintained in operation without any chance of boiling.
• This opens also for heating with wood, maintaining the comfort of the central heating system.
• wood may be used for example once a week.
• the development for wood firing kettles extend towards kettles having small water content and as little ceramics weight as possible in the combustion zone. The reason for this mainly is that such kettles very rapidly reach correct working temperature, thereby providing a minimum of contamination and 5 also that only a small effect is connected to the kettle itself.
• a kettle of the known type has a very large water volume and a ceramics weigh which binds 27 kWh before it comes up in the correct working temperature, lasting about 1% hours. In another embodiment only 8 kWh is bound up and the working temperature is 0 achieved after 15-20 minutes.
• a kettle may connected to an accumulator tank in a number of ways.
• the most known and simple connection principle is based on a constant circulation through the kettle and the storage. This means, however, that the kettle is not sufficiently 5 warm before the storage is partly loaded, resulting into condensation in the kettle due to low temperature.
• the normal connection between the storage and the kettle is use of a charging pump and a thermostat valve ensuring the internal circulation in the kettle until the operation temperature i achieved and where cold water from the storage gradually is drawn from the storage.
• the disadvantage with this connection is that the residual energy of the kettle cannot be exploited. As mentioned above, relatively large residual energies
• figure 1 schematically a section along I-1 in figure 2 and figure 2 discloses a front
• the kettle 2 itself is inserted into the storage 1. Furthermore, the kettle 2 comprises a completely or partly insulated box 3, effecting the water in the box 3 is heated first.
• 35 11 may be secured to the outside of the sides and the bottom of the box 3. This ensures quick heating and avoids a longer period with a "wet" kettle in the heating phase.
• a sucking pipe 4 water is drawn up to the box 3 such that it is possible to charge the entire storage 1. Without such a device the heating would stop due to stratifications in the water, after the water above the kettle 2 has been heated.
• thermostat valves 10 which gradually open when the water temperature in the box 3 increases sufficiently.
• New and cold water from the bottom of the storage 1 is drawn into the box 3 by means of the sucking pipe 4 and replaces the water which is drawn up to the top of the storage. This process continuous until the storage 1 is completely charged or until a desired charging degree is achieved, by which thermostats may be controlled, which may be arranged at different levels in the storage.
• FIG. 1 discloses schematically a coupling with a circulation pump 7. If such a circulation pump 7 is used, the coupling would be made such that the circulation pump circulates the water in the kettle part 3 in the starting phase, until the working temperature is achieved and thereafter the thermostat valve 8 gradually will let water out of the upper portion of the storage 1 and simultaneously draw new water in, through the riser 4.
• the self-circulation principle can be combined with a pump 7, a propeller or such, for internal stiring of the box. This will avoid that the hot water in the box to an unacceptable degree is ascending up to the top of the box in such a way that the lower surface of the kettle is too cold.
• the riser may be extended above the bottom of the box in such a way that the cold water drains relatively high up in the box. This will ensure an internal stiring in the box when the cold water sinks and mixes with the already heated water.
• baffle plates may be arranged.
• the box may be insulated on the outside and/or inside to avoid the metal surfaces of the box to function as heat exchangers against the cold system water. Even the upper surface of the box 3 may be insulated, because the residual heat in the kettle can penetrate into the system water even if the thermostat valves should be closed.
• the box itself may be made of insulating .material.
• the kettle and the storage as such may be delivered as a complete single unit directly to the construction site.
• the risk for faulty connections of the security equipment for the kettle and the storage thereby is substantially reduced.
• the kettle according to the present invention the kettle can be provided with an oil burner in the lower door and later modifications are substantially simplified by use of the embodiment according to the invention, having the kettle inserted in the storage.

Landscapes

• Engineering & Computer Science (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)
• Central Heating Systems (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=19896653

Family Applications (1)

Country Status (4)

Families Citing this family (2)

Family Cites Families (5)

• 1993
  • 1993-12-06 NO NO934438A patent/NO179424C/no unknown
• 1994
  • 1994-12-06 WO PCT/NO1994/000198 patent/WO1995016169A1/en not_active Application Discontinuation
  • 1994-12-06 AU AU12509/95A patent/AU1250995A/en not_active Abandoned
  • 1994-12-06 EP EP95903467A patent/EP0736160A1/en not_active Withdrawn

Non-Patent Citations (1)

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