GB2124356A - Water heating heat exchanger - Google Patents
Water heating heat exchanger Download PDFInfo
- Publication number
- GB2124356A GB2124356A GB08220644A GB8220644A GB2124356A GB 2124356 A GB2124356 A GB 2124356A GB 08220644 A GB08220644 A GB 08220644A GB 8220644 A GB8220644 A GB 8220644A GB 2124356 A GB2124356 A GB 2124356A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tank
- water tank
- water
- heat
- heat exchanger
- 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- Withdrawn
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 238000010438 heat treatment Methods 0.000 title 1
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 239000003507 refrigerant Substances 0.000 claims abstract description 15
- 239000013505 freshwater Substances 0.000 claims abstract description 13
- 239000002351 wastewater Substances 0.000 claims abstract description 13
- 238000009835 boiling Methods 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 238000009833 condensation Methods 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000003028 elevating effect Effects 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- 230000008016 vaporization Effects 0.000 claims description 2
- 238000011109 contamination Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- F24D17/0005—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
- 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
- F28D15/0275—Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
-
- 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
- F24D2200/00—Heat sources or energy sources
- F24D2200/16—Waste heat
- F24D2200/20—Sewage water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
- F28F2009/222—Particular guide plates, baffles or deflectors, e.g. having particular orientation relative to an elongated casing or conduit
- F28F2009/224—Longitudinal partitions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
- F28F2009/222—Particular guide plates, baffles or deflectors, e.g. having particular orientation relative to an elongated casing or conduit
- F28F2009/226—Transversal partitions
-
- 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
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)
- Washing And Drying Of Tableware (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
An energy saving liquid to liquid heat exchanger for a dishwasher discharging hot waste water, comprises a hot water tank (6) for holding the waste water from the dishwasher and having inlet and outlet pipes (8, 10), a cold water tank (7) for holding the fresh water going to a water heater and having inlet and outlet pipes (13, 15), the cold water tank (7) being disposed on top of the hot water tank (6), a bundle of heat pipes containing low boiling refrigerant disposed inside of the two tanks so as to extract heat from the hot water tank (6) and give it up to the cold water tank (7), whereby the temperature of the fresh water leaving the heat exchanger is higher than its entering temperature, each tank (6, 7) including a central vertical baffle (21) dividing the tank into elongate water inlet and outlet sections, and each section including horizontal baffles (16) which are staggered along the length of the respective section. <IMAGE>
Description
SPECIFICATION
Heat exchanger
The present invention relates to liquid to liquid heat exchangers.
The principal object of my invention is the provision of an energy saving liquid to liquid heat exchanger which materially contributes to the more efficient utilization and conservation of energy sources.
According to the invention there is provided an energy saving liquid to liquid heat exchanger for a dishwasher or like device discharging hot waste water comprising a hot water tank for holding waste water from the dishwasher and having inlet and outlet pipes and a top;
a cold water tank for holding the fresh water going to a waterheater and having inlet and outlet pipes and a bottom;
the cold water tank being mounted upon and in alignment with the hot water tank and secured thereto;
a central vertical baffle within and along the length of each tank, defining elongated intake and outlet sections connected to said tank inlet and tank outlet pipes respectively;;
a plurality of oppositely directed horizontal baffles arranged upon opposite sides of said vertical baffle with the one baffle on one side extending to the vertical baffle and the adjacent baffle extending to the wall of the tank, the baffles being laterally staggered whereby inwardly flowing water passes through the respective intake sections and successively through the respective outlet sections to the corresponding outlets;
and a bundle of parallel spaced heat pipes containing low boiling refrigerant, each pipe extending along the length of and between said tanks and through the corresponding baffles therein and sealingly through the top of the hot water tank and the bottom of the cold water tank;
said tubes at their lower ends extracting heat from the hot water tank vaporizing said refrigerant, the refrigerant vapor rising to the upper ends of said tubes;;
water in the cold water tank successively condensing said vapor, with the heat of condensation being transferred to the water in the cold water tank, whereby the temperature of the fresh water leaving the heat exchanger is higher than its entering temperature;
said baffles being arranged so that water as it moves through the respective sections of the respective tanks moves laterally therein along the respective staggered baffles substantially at right angles to the respective heat pipes.
Further according to the invention there is provided an energy saving liquid to liquid heat exchange process for a dishwasher or like device discharging hot waste water comprising;
providing a hot water tank for holding the waste water from the dishwasher or like device and having inlet and outlet pipes;
providing a cold water tank for holding the fresh water going to a waterheater and having inlet and outlet pipes;
disposing the cold water tank on top of the hot water tank;
disposing inside of the two tanks a bundle of heat pipes containing low-boiling refrigerant;
providing a vertical baffle in and along the length of each tank defining elongated inlet and outlet sections in each tank;
positioning and laterally staggering baffles in each tank and within each section and spaced along the length thereof;;
causing the intake water to move in a path at right angles to the heat pipes and longitudinally of the respective inlet and outlet sections with the water in opposing sections in each tank moving in opposite directions;
evaporating the refrigerant in the heat pipes within the hot water tank extracting heat from the water in the hot water tank;
and condensing refrigerant in the tubes in the cold water tank, with the heat of condensation being transmitted to the water within the cold water tank, elevating the temperature of the fresh water leaving the heat exchanger above its entering temperature.
The present invention, together with the advantages thereof, will become more apparent during the course of the following description, taken in conjunction with the accompanying drawings, in which:
Figures 1 and 2 are, respectively, front elevational and top plan views of an energy saving liquid to liquid heat exchanger embodying my invention.
Referring to the drawings in greater detail, 5 generally designates said heat exchanger which, i this instance, is a water to water heat exchanger for a dishwasher or like device which discharges hot waste water. Said heat exchanger 5 comprises hot and cold water tanks 6 and 7, respectively, of independent water integrity commonly containing a bundle of spaced apart heat pipes 9 each containing low boiling refrigerant as is well known.
Each pipe 9 has ends that are spun closed as will be described. Hot water tank 6 is provided with inlet and outlet pipes 8 and 10, respectively, and drain pipe 1 2. Cold water tank 7 is provided with inlet and outlet pipes 13 and 15, respectively, and a drain pipe 1 9. Conventional water tight seals (not shown) are provided at the top of the hot water tank 6 and at the bottom of cold water tank 7 where the heat pipes 9 pass therethrough.The junction between the two tanks 6 and 7 is preferably insulated at the periphery thereof and closed off as indicated at 11. Each tank is provided with a plurality of oppositely directing horizontal baffles 1 6 and 17, respectively, and a central vertical baffle 21 Said baffles 1 6, 17 and 21 cause the liquid flow in each tank to go down one side and up the other and to flow cross-wise of the heat pipes 9 in opposite directions in each half of the tank.
In operation of said heat exchanger 5, fresh water for a waterheater is piped to inlet pipe 1 3 and outlet pipe 1 5 is piped to the inlet of the hot water heater.
The waste water from the dishwasher is piped to inlet pipe 8 and outlet pipe 10 is piped to the sewer. The low boiling liquid refrigerant in the heat pipes 9 continually extracts heat from tank 6 by boiling and gives up heat to tank 7 by condensing. Liquid condensed at the upper end of each heat pipe 9 runs down the inside wall thereof and gases generated at the lower end thereof from boiling rise to the top. This boiling and condensing process takes place continually in the heat pipes 9 during operation of the heat exchanger 5 so that the temperature of the fresh water leaving the heat exchanger 5 (outlet pipe 15) is elevated above its entrance temperature. Temperature indicators or a combination of temperature indicators and flow meters or a direct read-out
BTU meter may be employed to monitor the heat exchanger 5 to see that it is functioning properly.
The savings in energy realized from the operation of a dishwasher equipped with my heat exchanger 5 (from the descreased use of heat required to heat the water) will pay for the cost thereof in a short time.
It will thus be seen that there has been provided by my invention an energy saving liquid to liquid heat exchanger in which the object hereinabove set forth, together with many thoroughly practical advantages, has been successfuliy achieved. For example, the independent water integrity of the two tanks 6 and 7 means that there can be no contamination of the fresh water entering the dishwasher if a leak develops in the hot waste water tank. Likewise, my invention provides a heat pipe filling and sealing machine which also materially contributes to the more efficient utilization and conservation of energy sources by making heat pipes with spun closed seals available in quantities and at prices to make it feasible to manufacture said heat exchanger. While a preferred embodiment of my invention has been shown and described, it is to be understood that changes and variations may be resorted to without departing from the spirit of my invention as defined by the appended claims.
Claims (7)
1. An energy saving liquid to liquid heat exchanger for a dishwasher or like device discharging hot waste water comprising a hot water tank for holding waste water from the dishwasher and having inlet and outlet pipes and a top;
a cold water tank for holding the fresh water going to a waterheater and having inlet and outlet pipes and a bottom;
the cold water tank being mounted upon and in alignment with the hot water tank and secured thereto.
a central vertical baffle within and along the length of each tank, defining elongated intake and outlet sections connected to said tank inlet and tank outlet pipes respectively;
a plurality of oppositely directed horizontal baffles arranged upon opposite sides of said vertical baffle with the one baffle on one side extending to the vertical baffle and the adjacent baffle extending to the wall of the tank, the baffles being laterally staggered whereby inwardly flowing water passes through the respective intake sections and successively through the respective outlet sections to the corresponding outlets;
and a bundle of parallel spaced heat pipes containing low boiling refrigerant, each pipe extending along the length of and between said tanks and through the corresponding baffles therein and sealingly through the top of the hot water tank and the bottom of the cold water tank;;
said tubes at their lower ends extracting heat from the hot water tank vaporizing said refrigerant, the refrigerant vapor rising to the upper ends of said tubes;
water in the cold water tank successively condensing said vapor, with the heat of condensation being transferred to the water in the cold water tank, whereby the temperature of the fresh water leaving the heat exchanger is higher than its entering temperature;
said baffles being arranged so that water as it moves through the respective sections of the respective tanks moves laterally therein along the respective staggered baffles substantially at right angles to the respective heat pipes.
2. A heat exchanger according to claim 1, wherein said tank top and tank bottom are spaced apart and insulated.
3. A heat exchanger according to claim 2, comprising an annular band overlying and interconnecting said top and bottom of said tanks.
4. A heat exchanger according to claim 1, 2 or 3, wherein the horizontal baffles in the respective tanks are so arranged that water flows crosswise of said heat pipes and in opposite directions in adjacent sections of each tank.
5. An energy saving liquid to liquid heat exchange process for a dishwasher or like device discharging hot waste water comprising:
providing a hot water tank for holding the waste water from the dishwasher or like device and having inlet and outlet pipes;
providing a cold water tank for holding the fresh water going to a waterheater and having inlet and outlet pipes;
disposing the cold water tank on top of the hot water tank;
disposing inside of the two tanks a bundle of heat pipes containing low-boiling refrigerant;
providing a vertical baffle in and along the length of each tank defining elongated inlet and outlet sections in each tank;
positioning and laterally staggering baffles in each tank and within each section and spaced along the length thereof; ;
causing the intake water to move in a path at right angles to the heat pipes and longitudinally of the respective inlet and outlet sections with the water in opposing sections in each tank moving in opposite directions;
evaporating the refrigerant in the heat pipes within the hot water tank extracting heat from the water in the hot water tank;
and condensing refrigerant in the tubes in the cold water tank, with the heat of condensation being transmitted to the water within the cold water tank, elevating the temperature of the fresh water leaving the heat exchanger above its entering temperature.
6. An energy saving liquid to liquid heat exchanger substantially as herein described with reference to the accompanying drawings.
7. An energy saving liquid to liquid heat exchange process substantially as herein described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08220644A GB2124356A (en) | 1982-07-16 | 1982-07-16 | Water heating heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08220644A GB2124356A (en) | 1982-07-16 | 1982-07-16 | Water heating heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2124356A true GB2124356A (en) | 1984-02-15 |
Family
ID=10531718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08220644A Withdrawn GB2124356A (en) | 1982-07-16 | 1982-07-16 | Water heating heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2124356A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2165932A (en) * | 1984-10-19 | 1986-04-23 | Robert Alan Chard | Recuperative waste water trap |
| WO2010038074A1 (en) * | 2008-10-02 | 2010-04-08 | Andrew Martin Reason | Washing appliance |
| EP2309052A1 (en) * | 2009-10-09 | 2011-04-13 | BSH Bosch und Siemens Hausgeräte GmbH | Method for recovering energy from the heat of waste water of a water-bearing domestic appliance |
| WO2011135334A3 (en) * | 2010-04-26 | 2012-01-12 | Dumitru Fetcu | Heat exchanger |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB351138A (en) * | 1930-04-14 | 1931-06-25 | James Andrews | Improvements in or connected with the heating of feed water |
| GB388237A (en) * | 1932-04-07 | 1933-02-23 | Fred Hepworth | Heat exchanging apparatus such as radiators, condensers, air heaters, air coolers, oil coolers, and like heating and, cooling apparatus |
| GB974355A (en) * | 1960-03-25 | 1964-11-04 | English Electric Co Ltd | Improvements in and relating to header type tubular heat exchangers |
| GB2024401A (en) * | 1978-07-03 | 1980-01-09 | Funke Waerme Apparate Kg | Heat exchanger |
| GB1559937A (en) * | 1976-08-07 | 1980-01-30 | Buderus Ag | Apparatus for recovering heat from waste water |
| GB2058325A (en) * | 1979-07-04 | 1981-04-08 | Daimler Benz Ag | Heat exchangers using heat pipes |
| WO1981001874A1 (en) * | 1979-12-19 | 1981-07-09 | Nordstjernan Rederi Ab | Method and apparatus for transferring heat from waste water from a building |
-
1982
- 1982-07-16 GB GB08220644A patent/GB2124356A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB351138A (en) * | 1930-04-14 | 1931-06-25 | James Andrews | Improvements in or connected with the heating of feed water |
| GB388237A (en) * | 1932-04-07 | 1933-02-23 | Fred Hepworth | Heat exchanging apparatus such as radiators, condensers, air heaters, air coolers, oil coolers, and like heating and, cooling apparatus |
| GB974355A (en) * | 1960-03-25 | 1964-11-04 | English Electric Co Ltd | Improvements in and relating to header type tubular heat exchangers |
| GB1559937A (en) * | 1976-08-07 | 1980-01-30 | Buderus Ag | Apparatus for recovering heat from waste water |
| GB2024401A (en) * | 1978-07-03 | 1980-01-09 | Funke Waerme Apparate Kg | Heat exchanger |
| GB2058325A (en) * | 1979-07-04 | 1981-04-08 | Daimler Benz Ag | Heat exchangers using heat pipes |
| WO1981001874A1 (en) * | 1979-12-19 | 1981-07-09 | Nordstjernan Rederi Ab | Method and apparatus for transferring heat from waste water from a building |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2165932A (en) * | 1984-10-19 | 1986-04-23 | Robert Alan Chard | Recuperative waste water trap |
| WO2010038074A1 (en) * | 2008-10-02 | 2010-04-08 | Andrew Martin Reason | Washing appliance |
| US20110179830A1 (en) * | 2008-10-02 | 2011-07-28 | Andrew Martin Reason | Washing appliance |
| EP2309052A1 (en) * | 2009-10-09 | 2011-04-13 | BSH Bosch und Siemens Hausgeräte GmbH | Method for recovering energy from the heat of waste water of a water-bearing domestic appliance |
| WO2011135334A3 (en) * | 2010-04-26 | 2012-01-12 | Dumitru Fetcu | Heat exchanger |
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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) |