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GB2385785A - Domestic shower waste water heat exchanger - Google Patents

Domestic shower waste water heat exchanger Download PDF

Info

Publication number
GB2385785A
GB2385785A GB0204834A GB0204834A GB2385785A GB 2385785 A GB2385785 A GB 2385785A GB 0204834 A GB0204834 A GB 0204834A GB 0204834 A GB0204834 A GB 0204834A GB 2385785 A GB2385785 A GB 2385785A
Authority
GB
United Kingdom
Prior art keywords
heat exchanger
water
waste water
heat
water heat
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.)
Withdrawn
Application number
GB0204834A
Other versions
GB0204834D0 (en
Inventor
Jules Wood
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB0204834A priority Critical patent/GB2385785A/en
Publication of GB0204834D0 publication Critical patent/GB0204834D0/en
Publication of GB2385785A publication Critical patent/GB2385785A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
    • F28D7/082—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
    • F28D7/085—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration in the form of parallel conduits coupled by bent portions
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • 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
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0012—Recuperative heat exchangers the heat being recuperated from waste water or from condensates
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/005—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for only one medium being tubes having bent portions or being assembled from bent tubes or being tubes having a toroidal configuration
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C2001/005—Installations allowing recovery of heat from waste water for warming up fresh water
    • 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]
    • Y02B30/56—Heat recovery units

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Details Of Fluid Heaters (AREA)

Abstract

The heat exchanger (1) is fitted in the bath/shower cubicle drain pipe (2) and uses heat from the waste water to preheat the mains supply to the shower water heater. The heat exchanger is only suitable for use with showers that use electric water heaters or combi-boilers, which heat the water on demand.

Description

<Desc/Clms Page number 1>
DOMESTIC SHOWER WASTE WATER HEAT EXCHANGER 1. I conceived the idea for the invention because the combi-boiler, that supplies the central heating and domestic hot water, in my home is of an insufficient capacity to heat water for the shower to a comfortable temperature. This problem only manifests itself during the winter months when the mains water supply to the house is colder. It occurred to me that an efficient way of preheating the water would be to recover heat energy from the shower waste as it left the bath/shower cubicle by means of a heat exchanger.
2. This invention will only provide energy savings when used in conjunction with water heaters that heat water on demand i. e. electric showers and combi-boilers and in applications where the waste water goes directly to drains l. e. domestic showers.
3. It is important that the heat exchanger is situated close to the bath plughole/shower cubicle drain in order to maximise the heat recovery. It is also important that the heat exchanger remains flooded and that there is sufficient coil surface area to make the heat transfer effective.
4. The invention is made using normal materials associated with domestic plumbing and is of a size and shape to fit under a normal bath and fit into the existing plumbing.
5. A preferred embodiment of the invention will now be described with reference to the accompanying drawing in which: FIGURE 1 shows a typical arrangement when incorporated with an electric wall mounted shower heater unit-side elevation.
FIGURE 2 shows the heat exchanger in detail - 3rd angle projection 6. As shown in Fig 1 the heat exchanger (1) is fitted into existing pipework (2) underneath the bath (3). The cold supply (4) to the tap remains untouched, however the cold supply (5) to the shower water heater (6) is plumbed via the heat exchanger (1). A U-bend type water trap (7) is fitted on the outlet side of the heat exchanger (1) to ensure it remains flooded. This serves to maximise heat transfer and prevent odours passing back up through the drain. The hot water supply from the domestic boiler (8) remains untouched.
7. Fig 2 shows the heat exchanger (1) in detail with a view through the top panel. The cold water tubenest arrangement (9) can be seen. Note Direction of Flow arrows.
8. An alternative embodiment of the invention, used in conjunction with a combi-boiler, has not been depicted as the drawing would be cramped on A4 paper. However it would work equally as well.

Claims (5)

  1. CLAIMS 1. A heat exchanger that recovers heat energy from waste water and uses it to preheat the mains water supply to a gas/electric water heater.
  2. 2. A heat exchanger as claimed in Claim 1 that could be inserted into existing plumbing.
  3. 3. A heat exchanger as claimed in Claim 1 or Claim 2 that uses gravity to provide the flow of waste water.
  4. 4. A heat exchanger as claimed in Claim 1 or Claim 2 or Claim 3 that is only suitable for use with an electric shower heater or combi-boiler, not a stored hot water system.
  5. 5. A heat exchanger substantially as herein described above and illustrated in the accompanying drawings
GB0204834A 2002-03-01 2002-03-01 Domestic shower waste water heat exchanger Withdrawn GB2385785A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0204834A GB2385785A (en) 2002-03-01 2002-03-01 Domestic shower waste water heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0204834A GB2385785A (en) 2002-03-01 2002-03-01 Domestic shower waste water heat exchanger

Publications (2)

Publication Number Publication Date
GB0204834D0 GB0204834D0 (en) 2002-04-17
GB2385785A true GB2385785A (en) 2003-09-03

Family

ID=9932075

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0204834A Withdrawn GB2385785A (en) 2002-03-01 2002-03-01 Domestic shower waste water heat exchanger

Country Status (1)

Country Link
GB (1) GB2385785A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005073474A1 (en) * 2004-01-29 2005-08-11 Energiatehnika OU Waste water piping with heat exchanger for bathing installations
WO2011011892A1 (en) * 2009-07-29 2011-02-03 Prodigy Energy Recovery Systems Inc. Gravity driven heat exchanger using greywater from drain
WO2010140138A3 (en) * 2009-06-04 2011-10-13 Garcia Melico Jose Alberto Heat recovery system and thermo-syphon thereof
WO2016042367A1 (en) * 2014-09-15 2016-03-24 Vago Ernesto João Passage box for a water supply system
EP3748240A1 (en) 2019-06-03 2020-12-09 Patentbox Internacional, S.L. Thermal energy interchanger and optimizer system for housing, industrial installations, premise or similar
WO2024002977A1 (en) * 2022-07-01 2024-01-04 Enduce Ab A drain system and a shower or shower cabin

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DE 19608404 A *
DE 19817031 A *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005073474A1 (en) * 2004-01-29 2005-08-11 Energiatehnika OU Waste water piping with heat exchanger for bathing installations
WO2010140138A3 (en) * 2009-06-04 2011-10-13 Garcia Melico Jose Alberto Heat recovery system and thermo-syphon thereof
WO2011011892A1 (en) * 2009-07-29 2011-02-03 Prodigy Energy Recovery Systems Inc. Gravity driven heat exchanger using greywater from drain
WO2016042367A1 (en) * 2014-09-15 2016-03-24 Vago Ernesto João Passage box for a water supply system
EP3748240A1 (en) 2019-06-03 2020-12-09 Patentbox Internacional, S.L. Thermal energy interchanger and optimizer system for housing, industrial installations, premise or similar
WO2024002977A1 (en) * 2022-07-01 2024-01-04 Enduce Ab A drain system and a shower or shower cabin

Also Published As

Publication number Publication date
GB0204834D0 (en) 2002-04-17

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)