US20130145788A1 - Device for preparing hot water by recovering heat from waste water - Google Patents

Device for preparing hot water by recovering heat from waste water Download PDF

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Publication number
US20130145788A1
US20130145788A1 US13/701,539 US201113701539A US2013145788A1 US 20130145788 A1 US20130145788 A1 US 20130145788A1 US 201113701539 A US201113701539 A US 201113701539A US 2013145788 A1 US2013145788 A1 US 2013145788A1
Authority
US
United States
Prior art keywords
compressor
hot water
heat
water reservoir
heat pipe
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US13/701,539
Other languages
English (en)
Inventor
Stefan Holzer
Evgeni Rehfuss
Andreas Renner
Markus Spielmannleitner
Gerhard Wetzl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Assigned to BSH BOSCH UND SIEMENS HAUSGERAETE GMBH reassignment BSH BOSCH UND SIEMENS HAUSGERAETE GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: REHFUSS, EVGENI, SPIELMANNLEITNER, MARKUS, RENNER, ANDREAS, HOLZER, STEFAN, WETZL, GERHARD
Publication of US20130145788A1 publication Critical patent/US20130145788A1/en
Abandoned legal-status Critical Current

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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
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters
    • F24H4/04—Storage heaters
    • 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
    • F24D17/0005—Domestic hot-water supply systems using recuperation of waste heat
    • F24D17/001—Domestic hot-water supply systems using recuperation of waste heat with accumulation of heated water
    • 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
    • F24D17/02—Domestic hot-water supply systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
    • F28D15/043—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure forming loops, e.g. capillary pumped loops
    • 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
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/07—Heat pipes
    • 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
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12—Hot water central heating systems using heat pumps
    • 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
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/18—Domestic hot-water supply systems using recuperated or waste heat
    • 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
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency

Definitions

  • the invention relates to a device for preparing hot water by recovering heat from waste water by means of a heat pump comprising a compressor and an evaporator, in particular by means of a small heat pump for household applications, having a hot water reservoir, which is supplied with thermal energy by the evaporator of the heat pump.
  • Heat is generally recovered from waste water in devices known from practical use by means of a saturated steam circulation process.
  • the compressor used here heats up during operation generally to temperatures in a range between around 70° C. and 90° C., which are therefore generally much higher than the temperature of the hot water reservoir which is maximum around 60 degrees. This higher temperature means that the compressor emits appreciable heat to the environment, easily amounting to more than 50 watts. This compressor heat is therefore lost so the small heat pump does not achieve a sufficiently high level of efficiency for economical operation.
  • the object of the invention is to utilize the waste heat from the compressor in a simple and economical manner, in order in this way to achieve a more efficient mode of operation during the recovery of heat from waste water.
  • this object is achieved in that the hot water reservoir is thermally connected to the compressor of the heat pump by way of at least one heat pipe, the hot water reservoir being disposed above the compressor and the at least one heat pipe serving to dissipate waste heat produced during operation of the compressor to the hot water reservoir.
  • the waste heat produced at the compressor of the heat pump during its operation can also be transmitted, it being possible, as known, for said heat pipes or heat tubes to transport large quantities of heat when arranged and embodied in an appropriate manner, in so far as the heat source, in this instance the compressor, is located at the lower end of the heat pipe and the heat sink, in this instance the hot water reservoir, is located at the higher end.
  • Such heat pipes are generally filled with a readily evaporated fluid, which collects in the region of the lower end.
  • the invention further proposes that the heat pipe should be connected with good thermal contact to the hot water reservoir or compressor by bonding, welding or soldering by means of a connection that cannot be released on one or both sides.
  • the heat pipe prefferably be connected with good thermal contact by means of a connection that can be released on one or both sides by way of clamping pieces or comparable connecting means connected in a fixed manner to the hot water reservoir or compressor.
  • This solution allows more flexible construction options for the device. In particular it is easier to take apart for maintenance purposes.
  • the heat pipes consist of at least partly elastically configured tubes. Firstly this allows a large free selection of positions for the hot water reservoir and compressor, the only condition being that the compressor is disposed lower than the hot water reservoir.
  • the elastic configuration of the tubes of the heat pipes means that the compressor vibrations occurring during operation can be absorbed more readily so they are not transmitted to the reservoir. This generally allows the device to operate more quietly.
  • the insulation is particularly advantageous here for the insulation to be provided with a coating that reflects infrared radiation, so that no radiant heat can be lost through the insulation.
  • Aluminum is particularly suitable for the coating material.
  • the compressor has a metallic gloss, low-radiation surface.
  • This surface is expediently made of corrosion-resistant material such as aluminum or chrome.
  • FIGURE shows a schematic illustration of a device according to the invention.
  • the device shown only schematically in the drawing serves to prepare hot water, with heat being recovered from the waste water that results preferably with household applications by means of a heat pump.
  • This heat pump consists in the usual manner of a compressor 1 and an evaporator (not shown in detail) as well as of a condenser and throttle valve (also not shown in the drawing).
  • Such devices configured in the form of a small heat pump can be used in particular for household applications.
  • a hot water reservoir 2 which is supplied with thermal energy by the evaporator of the heat pump.
  • the hot water reservoir 2 is set up with connectors 3 (only outlined in the drawing) for water on the one hand and the cooling circuit on the other hand, the connectors 3 not being shown in detail in the drawing for the sake of clarity.
  • the hot water reservoir 2 is thermally connected to the compressor 1 of the heat pump by way of two so-called heat pipes 4 , the arrangement being selected so that the hot water reservoir 2 is disposed above the compressor 1 .
  • These heat pipes 4 or heat tubes are filled with a readily evaporated fluid, which collects in the lower region. When this lower region is heated, in this instance by the compressor 1 , the fluid evaporates and the vapor is distributed throughout the pipe, said vapor condensing back in the colder upper region and emitting the condensation heat there.
  • This type of heat transmission ensures that heat is transported essentially from bottom to top, as there is no fluid that could evaporate in the upper region. Heat is therefore only transported from top to bottom by way of heat conduction through the heat tube. However this component is comparatively very small. This means that the compressor 1 , which is generally at a higher temperature than the hot water reservoir 2 during operation, emits heat to the hot water reservoir 2 . If the compressor 1 is deactivated however, the essentially unidirectional heat transmission through the heat pipes 4 prevents heat flowing from the hot water container to the then cooler compressor 1 .
  • the two heat pipes 4 are in good thermal contact with the hot water reservoir 2 or compressor 1 , this thermal contact consisting of either a non-releasable connection by bonding, welding or soldering or a releasable connection, with clamping pieces 5 or comparable connecting means connected in a fixed manner to the hot water reservoir 2 or compressor 1 then being provided, which accommodate the ends of the heat pipes 4 .
  • the heat pipes 4 can consist, in a manner not shown in detail in the drawing, of at least partly elastically configured tubes, these allowing simpler assembly and a largely free selection of the position of the hot water reservoir 2 in relation to the compressor 1 .
  • the elastic tubes can also absorb the vibrations of the compressor 1 occurring during operation, so they are not transmitted to the reservoir, thereby allowing quieter operation generally.
  • the compressor 1 , the heat pipes 4 and the hot water reservoir 2 are generally provided with insulation in a manner that is also not illustrated in detail, it being possible for said insulation to be configured so that the compressor 1 , the heat pipes 4 and the hot water reservoir 2 are all enclosed by it.
  • said insulation can be provided with a coating that reflects infrared radiation. Aluminum is particularly suitable for this coating.
  • it should not be painted black in the usual manner but should have a metallic gloss, low-radiation surface. A corrosion-resistant material such as aluminum or chrome is particularly recommended for this.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
US13/701,539 2010-06-09 2011-05-26 Device for preparing hot water by recovering heat from waste water Abandoned US20130145788A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010029880.8 2010-06-09
DE102010029880A DE102010029880A1 (de) 2010-06-09 2010-06-09 Vorrichtug zur Warmwasserbereitung durch Abwasserwärmerückgewinnung
PCT/EP2011/058614 WO2011154264A2 (fr) 2010-06-09 2011-05-26 Dispositif de production d'eau chaude par récupération de chaleur d'eaux usées

Publications (1)

Publication Number Publication Date
US20130145788A1 true US20130145788A1 (en) 2013-06-13

Family

ID=44626620

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/701,539 Abandoned US20130145788A1 (en) 2010-06-09 2011-05-26 Device for preparing hot water by recovering heat from waste water

Country Status (7)

Country Link
US (1) US20130145788A1 (fr)
EP (1) EP2580529A2 (fr)
JP (1) JP2013528281A (fr)
CN (1) CN102933908A (fr)
DE (1) DE102010029880A1 (fr)
RU (1) RU2012153790A (fr)
WO (1) WO2011154264A2 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2700279A (en) * 1952-06-12 1955-01-25 Gen Motors Corp Refrigerating apparatus and water heater
US4206805A (en) * 1978-03-30 1980-06-10 Beckett Ralph R Heat recovery unit
US6749014B2 (en) * 1999-09-23 2004-06-15 Joseph C. Ferraro External flue heat exchangers
US20070259155A1 (en) * 2001-02-27 2007-11-08 Lawrence Zupon Reflective insulation
US20090096301A1 (en) * 2007-10-16 2009-04-16 Denso Corporation Motor drive circuit mounting structure and electric compressor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2700279A (en) * 1952-06-12 1955-01-25 Gen Motors Corp Refrigerating apparatus and water heater
US4206805A (en) * 1978-03-30 1980-06-10 Beckett Ralph R Heat recovery unit
US6749014B2 (en) * 1999-09-23 2004-06-15 Joseph C. Ferraro External flue heat exchangers
US20070259155A1 (en) * 2001-02-27 2007-11-08 Lawrence Zupon Reflective insulation
US20090096301A1 (en) * 2007-10-16 2009-04-16 Denso Corporation Motor drive circuit mounting structure and electric compressor

Also Published As

Publication number Publication date
EP2580529A2 (fr) 2013-04-17
WO2011154264A2 (fr) 2011-12-15
DE102010029880A1 (de) 2011-12-15
JP2013528281A (ja) 2013-07-08
RU2012153790A (ru) 2014-07-20
CN102933908A (zh) 2013-02-13
WO2011154264A3 (fr) 2012-11-22

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Owner name: BSH BOSCH UND SIEMENS HAUSGERAETE GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HOLZER, STEFAN;REHFUSS, EVGENI;RENNER, ANDREAS;AND OTHERS;SIGNING DATES FROM 20121126 TO 20121223;REEL/FRAME:029722/0795

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION