GB2286654A - Apparatus for providing hot water and/or central heating - Google Patents
Apparatus for providing hot water and/or central heating Download PDFInfo
- Publication number
- GB2286654A GB2286654A GB9423865A GB9423865A GB2286654A GB 2286654 A GB2286654 A GB 2286654A GB 9423865 A GB9423865 A GB 9423865A GB 9423865 A GB9423865 A GB 9423865A GB 2286654 A GB2286654 A GB 2286654A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hot water
- water storage
- storage cylinder
- boiler
- heat exchange
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 181
- 238000010438 heat treatment Methods 0.000 title claims abstract description 28
- 239000007789 gas Substances 0.000 claims abstract description 14
- 238000004378 air conditioning Methods 0.000 claims description 19
- 239000004449 solid propellant Substances 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
- F28D21/0005—Recuperative heat exchangers the heat being recuperated from exhaust gases for domestic or space-heating systems
- F28D21/0007—Water 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
- F24D12/00—Other central heating systems
- F24D12/02—Other central heating systems having more than one heat source
-
- 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
- F24D3/00—Hot-water central heating systems
- F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
-
- 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
- F24D2200/18—Flue gas recuperation
-
- 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]
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)
- Water Supply & Treatment (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
Apparatus (2) for providing hot water and/or central heating comprises a boiler 4, a first hot water storage cylinder 6 which is connected to the boiler such that water in first cylinder 6 is able to be heated by hot water from the boiler, a heat exchange unit in boiler housing 20 which is heated by exhaust gases 36 from the boiler 4, and a second hot water storage cylinder 10 which is connected to the heat exchange unit such that water in the second cylinder 10 is able to be heated by hot water from the heat exchange unit. Heated water from the second hot water storage cylinder 10 is fed to the first hot water storage cylinder 6 via pipe 12 for further heating prior to use. Cylinders 6, 10 may be side-by-side. <IMAGE>
Description
APPARATUS FOR PROVIDING HOT WATER
AND/OR CENTRAL HEATING
This invention relates to apparatus for providing hot water and/or central heating.
Apparatus for providing hot water and/or central heating is well known and it is installed in the vast majority of homes, offices, factories and other premises. The known apparatus is not as efficient as it might be, and it is an aim of the present invention to improve on the efficiency.
In accordance with the present invention there is provided apparatus for providing hot water and/or central heating, which apparatus comprises a boiler, a first hot water storage cylinder which is connected to the boiler such that water in the first hot water storage cylinder is able to be heated by hot water from the boiler, a heat exchange unit which is heated by exhaust gases from the boiler, and a second hot water storage cylinder which is connected to the heat exchange unit such that water in the second hot water storage cylinder is able to be heated by hot water from the heat exchange unit, and the apparatus being such that the first and the second hot water storage cylinders are connected to each other such that heated water from the second hot water storage cylinder is able to be fed to the first hot water storage cylinder for further heating prior to use.
The apparatus of the invention is such that the normally wasted hot exhaust gases from the boiler are able to be utilised to heat the water in the second hot water storage cylinder. This second hot water storage cylinder acts as a heated auxiliary water storage cylinder for providing heated water to the first hot water storage cylinder. Thus the first hot water storage cylinder is able to heat its water to required temperatures faster and more efficiently than in known apparatus because the water being heated is already partially heated since it is the heated water that has come from the second hot water storage cylinder.
Known apparatus for providing hot water and/or central heating usually only employs a single hot water storage cylinder which is fed with cold water rather than with heated water. This single hot water storage cylinder equates to the first hot water storage cylinder used in the present invention. The single hot water storage cylinder is connected to a boiler such that water in the hot water storage cylinder is able to be heated by hot water from the boiler passing through a heat exchange coil in the hot water storage cylinder.
The hot water in the single hot water storage cylinder is used in a hot water system requiring hot water for use for washing and other purposes. Hot water from the boiler is also able to be diverted via a two or three port motorised valve for use in a central heating system requiring hot water for heating radiators. The radiators give up their heat by convection and radiation to the surrounding air. When hot water is not required and radiators are up to temperature, then the boiler is shut off, usually via a thermostatically controlled valve. When hot water is required or the radiators fall below a desired temperature, then the boiler starts up again. When hot water is drawn from the single hot water storage cylinder, the hot water is replaced by cold water from a cold water storage tank. This cold water can be as low as 40C.The entering cold water thus lowers the temperature of the remaining hot water in the hot water storage cylinder, before the boiler is ignited to reheat the water to the required temperature.
This reheating of the water in the hot water storage cylinder also has the effect of diverting heat from the central heating. If all the hot water is drawn from the the hot water storage cylinder, then the energy and time consumed to heat another lot of cold water is significant.
The apparatus of the present invention utilises the second hot water storage cylinder which feeds heated water to the first hot water storage cylinder. The heated water will usually not be up to the temperature required of the water in the first hot water storage cylinder, but the heated water will be considerably warmer than the cold water presently used for topping up the single hot water storage cylinder in the known apparatus for providing hot water. Thus the apparatus of the present invention is able to heat the water in the first hot water storage cylinder much more quickly than occurs in the single hot water storage cylinder in the known apparatus. Still further, the water in the second hot water storage cylinder is heated using the exhaust gases from the boiler and these exhaust gases are just wasted in known apparatus.Thus the apparatus of the present invention not only has a faster warm up time, but it uses heat that would otherwise have been wasted, so that the overall efficiency of the apparatus of the present invention is considerably increased over the known apparatus.
Preferably, the apparatus of the present invention is one in which the first and the second hot water storage cylinders are connected to each other by a pipe which extends from an upper part of the second hot water storage cylinder to a lower part of the first hot water storage cylinder.
The first and the second hot water storage cylinders may be positioned adjacent each other or, alternatively, they may be positioned spaced apart from each other. When the first and the second hot water storage cylinders are positioned adjacent each other they may be mounted one on top of each other or they may be mounted side by side.
The heat exchange unit may be positioned inside a housing of the boiler. Alternatively, the heat exchange unit may be positioned in a flue part of the boiler.
The heat exchange unit preferably comprises a series of parallel connected pipes. Other types of heat exchange unit may however be employed.
The apparatus of the invention may include air conditioning means for heating air entering a premises containing the apparatus, which air conditioning means comprises a fan and a heater which is heated by hot water from the heat exchange unit.
The heater preferably comprises a housing containing an S-shaped pipe, a zig-zag shaped pipe or a coiled pipe.
The fan is preferably positioned on an upstream side of the heater. If desired however the fan may be positioned on a downstream side of the heater.
The apparatus of the invention may include a thermostatically operated valve for controlling operation of the air conditioning system.
The apparatus of the invention may include a pump for pumping the hot water from the heat exchange unit to the air conditioning means.
The air conditioning means may be positioned in a loft of a premises containing the apparatus. Generally, the air conditioning means can be positioned where suitable and appropriate in a premises containing the apparatus.
The boiler may be a gas fired boiler, an oil fired boiler, or a solid fuel boiler.
The first hot water storage cylinder will usually contain a heat transfer coil. Similarly, the second hot water storage cylinder will usually contain a heat transfer coil.
The second hot water storage cylinder will usually be fed from an expansion tank.
The apparatus of the invention will usually include one or more radiators for the central heating.
Embodiments of the invention will now be described solely by way of example and with reference to the accompanying drawings in which:
Figure 1 shows first apparatus for providing hot water and/or central heating;
Figure 2 is a plan view of a heat exchange unit used in the apparatus shown in Figure 1; and
Figure 3 shows an alternative type of heat exchange unit for use in an alternative place to that shown in
Figure 1.
Referring to Figure 1, there is shown apparatus 2 for providing hot water and central heating. The apparatus 2 comprises a boiler 4, and a first hot water storage cylinder 6 which is connected to the boiler 4 such that water in the first hot water storage cylinder 6 is able to be heated by hot water from the boiler 4.
The apparatus 2 further comprises a heat exchange unit 8 which is heated by exhaust gases from the boiler 4. A second hot water storage cylinder 10 is connected to the heat exchange unit 8 such that water in the second hot water storage cylinder 10 is able to be heated by hot water from the heat exchange unit 8.
The apparatus 2 is such that the first and the second hot water storage cylinders 6, 10 are connected to each other such that the heated water from the second hot water storage cylinder 10 is able to be fed to the first hot water stoarage cylinder 6 for further heating prior to use.
As can be seen from Figure 1, the first and the second hot water storage cylinders 6, 10 are connected to each other by a pipe 12 which extends from an upper part 14 of the second hot water storage cylinder 10 to a lower part 16 of the first hot water storage cylinder 6.
As shown in Figure 1, the first and the second hot water storage cylinders 6, 10 are positioned adjacent and on top of each other. If desired, the first and the second hot water storage cylinders 6, 10 could alternatively be positioned side by side, for example in a purpose built frame.
The heat exchange unit 8 is positioned inside a housing 20 of the boiler 4. The heat exchange unit 8 is positioned in a top part of the housing 20 above a container 22 containing water 24. The water 24 is heated by flames 26 from a burner tube 28. Air for the combustion enters the housing 20 through an inlet part 30 of a flue 32. The inlet air is shown by arrows 34.
Combustion gases are shown by arrows 36. It will be seen that after the combustion gases 36 pass over the container 22 they leave the housing 20 through an outlet part 38 of the flue 32. The heat in the exhaust gases would normally be wasted but, in accordance with the present invention, the heat exchange unit 8 is provided in the upper part of the housing 20. Water in this heat exchange unit 8 becomes heated by the exhaust gases.
The hot water passes along a pipe 40. A pump 18, or alternatively a gravity system if the pump is not used, enables the hot water in the pipe 40 to pass via a pipe 42 to the second hot water storage cylinder 10, and via a pipe 44 to air conditioning means 46.
The air conditioning means 46 is for heating incoming air into a premises such for example as a house or offices containing the apparatus 2. As shown in
Figure 1, the premises has an outside wall 48, a floor 50 and a ceiling 52. A loft 54 is provided above the ceiling 52. The air conditioning means 46 comprises a fan 56 and a heater 58. The heater 58 receives hot water from the pipe 44 via a pipe 60. The pipe 60 leads into an S-shaped pipe arrangement 62 provided in a housing 64. The S-shaped pipe arrangement 62 has an outlet pipe 66 which leads to a downpipe 68. The downpipe 68 connects via a pipe 70 to a downpipe 72.
Hot water from the heat exchange unit 8 is able to enter a heat transfer coil 74 in the second hot water storage cylinder 10 via the pipes 40 and 42. Water in the heat transfer coil 74 passes through the downpipe 72 and back to the heat exchange unit 8 for re-heating.
Cooled water from the heater 58 passes along the pipes 66, 68, 70 and 72 and is also then re-heated by the heat exchange unit 8.
The fan 56 is positioned on an upstream side of the heater 58 as shown. If desired however the fan 56 could be provided on a downstream side of the heater 58. A thermostatically controlled valve 76 is provided for controlling the flow of water along the pipe 44 and thus for controlling the operation of the air conditioning means 46. A temperature sensor 78 is provided inside the second hot water storage cylinder 10 and this temperature sensor causes operation of the valve 76.
The pump 18 is able to pump the hot water from the heat exchange unit 8 to the air conditioning means 46. If the pump 18 is omitted, then the apparatus 2 operates by gravity.
The boiler 4 is shown as a gas fired boiler having an inlet valve 82. Other types of boiler 4 may be employed including an oil fired boiler 4 or a solid fuel boiler 4. The boiler 4 is shown as a floor mounted boiler but it could be a wall mounted boiler 4 if desired. As shown in Figure 1, the inlet/outlet 30, 38 to the flue 32 forms a balanced flue terminal. The boiler 4 may have any suitable and appropriate type of flue.
The first hot water storage cylinder 6 contains a heat transfer coil 86. Hot water 24 passes from the container 22 up along a pipe 88 and into the heat transfer coil 86 via a pipe 90. Cooled water leaves the heat transfer coil 86 via a pipe 92 and a downpipe 94.
The air conditioning means 46 is provided in the loft 54. The fan 56 operates in ducting 96 as shown.
The fan 56 is caused to operate by a thermostatically controlled valve 98 which itself operates by means of a sensor 100 positioned in the pipe 44. Expansion water from the heat exchange unit 8 and the air conditioning means 46 is fed to a tank 102 via a pipe 104. Overflow water from the heat transfer coil 74 passes to the tank 102 via pipes 106, 108. If the heat transfer coil 74 needs water, then this is provided by water 110 in the tank 102 passing along pipe 112. The water level in the tank 102 is controlled by a ball valve 114.
Water for the second hot water storage cylinder 10 is provided via pipes 116, 118 from a tank 120. A ball valve 122 controls the level of water in the tank 120.
Hot water from the first hot water storage cylinder 6 is obtained, for example at various desired taps (not shown), via pipe 124. Central heating radiators (not shown) are also provided with hot water from the tank 24 via a motorised valve 126 and a pipe 128. The tank 22 form a heat exchange unit. During operation of the apparatus 2, the system can be balanced by a balancing valve 130.
The apparatus 2 operates very economically because the heated exhaust gases from the boiler 4 that would normally be wasted are used to heat the water in the second hot water storage cylinder 10. This water is then provided in the first hot water storage cylinder 6 via the pipe 12 for further heating by the heat exchange coil 86. The heat exchange coil 86 is thus able to heat the water in the first hot water storage cylinder 6 faster and more economically than it would do if the infeed to the lower part 16 of the first hot water storage cylinder 6 were to be a cold water infeed rather than the heated water infeed shown in Figure 1.
The apparatus 2 shown in Figure 1 can be provided with appropriate drain plugs as desired. The first and second hot water storage cylinders 6, 10 will usually be provided with integral insulating jackets but separate insulating jackets which are tied in place may be employed. The various illustrated pipes will usually be copper pipes. During use of the apparatus 2, the valve 76 is able to divert the supply of hot water passing along the pipe 40 from the second hot water storage cylinder 10 and to the heat exchange means 46 as and when required at a temperature to be set and sensed by the temperature sensor 78. The air conditioning means 46 is itself able to be operated at a predetermined temperature by means of the valve 98 and the temperature sensor 100. The heat exchange unit 8 is provided with a drain valve 128 for draining down if desired.The heat exchange unit 8 and the air conditioning means 46 are both arranged to be self-priming during operation of the apparatus 2.
Referring now to Figure 2, there is shown in more detail the heat exchange unit 8. The heat exchange unit 8 comprises a plurality of parallel connected pipes 130 which connect between header ends 132, 134.
Figure 3 shows how a heat exchange unit 8 can be positioned in a flue 32 in the form of a balanced flue 32. Such a balanced flue 32 would be used for a wall mounted boiler 4 instead of a floor mounted boiler 4.
The apparatus 2 shown in the drawings is able to operate to give fuel saving without loss of basic heat requirements. Primary fuel sources such for example as gas and oil are conserved. A significant reduction in emissions of waste pollutants may be achieved, together with a reduction of wasted heat and an increase in cost effectiveness. Savings of approximately 58% on the cost of water heating and of approximately 25% on the cost of central heating may be achieved. The apparatus 2 is not costly to manufacture or install and it is applicable to the majority of central heating systems. The apparatus 2 can be installed as new system or it can be formed by conversion of an existing system.
It is to be appreciated that the embodiments of the invention described above with reference to the accompanying drawings have been given by way of example only and that modifications may be effected. Thus, for example, the apparatus 2 may be fitted with a temperature sensor and a display for monitoring and control purposes.
Claims (18)
1. Apparatus for providing hot water and/or central heating, which apparatus comprises a boiler, a first hot water storage cylinder which is connected to the boiler such that water in the first hot water storage cylinder is able to be heated by hot water from the boiler, a heat exchange unit which is heated by exhaust gases from the boiler, and a second hot water storage cylinder which is connected to the heat exchange unit such that water in the second hot water storage cylinder is able to be heated by hot water from the heat exchange unit, and the apparatus being such that the first and the second hot water storage cylinders are connected to each other such that the heated water from the second hot water storage cylinder is able to be fed to the first hot water storage cylinder for further heating prior to use.
2. Apparatus according to to claim 1 in which the first and the second hot water storage cylinders are connected to each other by a pipe which extends from an upper part of the second hot water storage cylinder to a lower part of the first hot water storage cylinder.
3. Apparatus according to claim 1 or claim 2 in which the first and the second hot water storage cylinders are positioned adjacent each other.
4. Apparatus according to claim 3 in which the first and the second hot water storage cylinders are mounted on top of one another or side by side.
5. Apparatus according to any one of the preceding claims in which the heat exchange unit is positioned inside a housing of the boiler.
6. Apparatus according to any one of claims 1-4 in which the heat exchange unit is positioned in a flue part of the boiler.
7. Apparatus according to any one of the preceding claims in which the heat exhange unit comprises a series of parallel connected pipes.
8. Apparatus according to any one of the preceding claims and including air conditioning means for heating air entering a premises containing the apparatus, which air conditioning means comprises a fan and a heater which is heated by hot water from the heat exchange unit.
9. Apparatus according to claim 8 in which the heater comprises a housing containing an S-shaped pipe, a zigzag shaped pipe or a coiled pipe.
10. Apparatus according to claim 8 or claim 9 in which the fan is positioned on an upstream side of the heater.
11. Apparatus according to any one of claims 8-10 and including a thermostatically operated valve for controlling operation of the air conditioning means.
12. Apparatus according to any one of claims 8-11 and including a pump for pumping the hot water from the heat exchange unit to the air conditioning means.
13. Apparatus according to any one of the preceding claims in which the boiler is a gas fired boiler, an oil fired boiler or a solid fuel boiler.
14. Apparatus according to any one of the preceding claims in which the first hot water storage cylinder contains a heat transfer coil.
15. Apparatus according to any one of the preceding claims in which the second hot water storage cylinder contains a heat transfer coil.
16. Apparatus according to any one of the preceding claims in which the second hot water storage cylinder is fed from an expansion tank.
17. . Apparatus according to any one of the preceding claims and including one or more radiators.
18. Apparatus for providing hot water and/or central heating, substantially as herein described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9403378A GB9403378D0 (en) | 1994-02-21 | 1994-02-21 | Spent heat reclamation system |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9423865D0 GB9423865D0 (en) | 1995-01-11 |
| GB2286654A true GB2286654A (en) | 1995-08-23 |
| GB2286654B GB2286654B (en) | 1998-01-14 |
Family
ID=10750749
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9403378A Pending GB9403378D0 (en) | 1994-02-21 | 1994-02-21 | Spent heat reclamation system |
| GB9423865A Expired - Fee Related GB2286654B (en) | 1994-02-21 | 1994-11-25 | Apparatus for providing hot water and/or central heating |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9403378A Pending GB9403378D0 (en) | 1994-02-21 | 1994-02-21 | Spent heat reclamation system |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB9403378D0 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2744202A1 (en) * | 1996-01-30 | 1997-08-01 | Vaillant Sarl | THERMAL STRATIFICATION SANITARY WATER ACCUMULATOR ASSEMBLY |
| WO2008007968A1 (en) * | 2006-07-14 | 2008-01-17 | Lars Hansen | An arrangement and a method for changing the temperature of a first and a second fluid located in two separate receptacles |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111121518B (en) * | 2019-12-26 | 2021-05-25 | 连云港江海机械设备制造有限公司 | Automatic waste heat recovery device and recovery method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1559958A (en) * | 1978-02-01 | 1980-01-30 | Parr T K | Water heating installation |
| GB2096288A (en) * | 1981-04-02 | 1982-10-13 | Whiston Stanley | Heating system |
-
1994
- 1994-02-21 GB GB9403378A patent/GB9403378D0/en active Pending
- 1994-11-25 GB GB9423865A patent/GB2286654B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1559958A (en) * | 1978-02-01 | 1980-01-30 | Parr T K | Water heating installation |
| GB2096288A (en) * | 1981-04-02 | 1982-10-13 | Whiston Stanley | Heating system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2744202A1 (en) * | 1996-01-30 | 1997-08-01 | Vaillant Sarl | THERMAL STRATIFICATION SANITARY WATER ACCUMULATOR ASSEMBLY |
| WO2008007968A1 (en) * | 2006-07-14 | 2008-01-17 | Lars Hansen | An arrangement and a method for changing the temperature of a first and a second fluid located in two separate receptacles |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9423865D0 (en) | 1995-01-11 |
| GB2286654B (en) | 1998-01-14 |
| GB9403378D0 (en) | 1994-04-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |