EP1740888A1 - Wärmetauscher - Google Patents
WärmetauscherInfo
- Publication number
- EP1740888A1 EP1740888A1 EP05731241A EP05731241A EP1740888A1 EP 1740888 A1 EP1740888 A1 EP 1740888A1 EP 05731241 A EP05731241 A EP 05731241A EP 05731241 A EP05731241 A EP 05731241A EP 1740888 A1 EP1740888 A1 EP 1740888A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flow path
- temperature sensor
- connection
- heat exchanger
- primary
- 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 description 11
- 239000007788 liquid Substances 0.000 description 7
- 239000013529 heat transfer fluid Substances 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 241000264877 Hippospongia communis Species 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000004065 semiconductor Substances 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
- F24D3/00—Hot-water central heating systems
- F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
- F24D3/087—Tap water heat exchangers specially adapted therefore
-
- 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
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
- F24D19/1069—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water regulation in function of the temperature of the domestic hot water
Definitions
- the invention relates to a heat exchanger with a primary-side flow path which is arranged between an inlet connection and an outlet connection, a secondary-side flow path which is arranged between an inlet connection and a return connection, a heat transfer surface arrangement between the primary-side flow path and the secondary-side flow path and a temperature sensor.
- Such a heat exchanger is used, for example, in a remote heating system to heat service water flowing through the secondary flow path.
- the amount of heat required for heating is transported via the heat transfer fluid of the district heating network.
- This heat transfer fluid flows through the primary flow path.
- the primary-side flow path and the secondary-side flow path lie against each other in a heat-conducting connection in a housing of the heat carrier, so that heat can be transferred via the heat transfer surface arrangement.
- such a heat exchanger can be used to heat domestic water which is used to heat a building, the heat also coming from a district heating network.
- the flow of the heat transfer fluid on the primary side is controlled as a function of the heat that is drawn off on the secondary side. This will be explained in the following using the example of process water that is heated in the heat exchanger. As soon as hot water on When the return connection is removed from the secondary side, cold process water flows into the inlet connection. Accordingly, heat transfer fluid must be able to flow through the primary-side flow path practically at the same time, so that sufficient heat can be transferred to the secondary side.
- a temperature sensor In order to control or even regulate a valve that controls the liquid flow on the primary side, a temperature sensor is often required, with the aid of which such a regulation can be carried out.
- WO 02/070976 A1 shows a heat exchanger of the type mentioned at the outset, in which the temperature sensor has an encapsulated space in which there is an expandable liquid or an expandable gas.
- This enclosed space is in a temperature-conducting connection with the heat exchanger. It can either be arranged on the outside or in the middle of the heat exchanger, where it is then acted upon by the temperature on the primary side and the temperature on the secondary side.
- the liquid or gas displaced from the encapsulated space acts directly on a valve in order to open or close it.
- the temperature sensor has an area
- Extension that is adapted to the largest area of the heat exchanger. It therefore requires a relatively large amount of installation space and is not readily able to provide the information necessary for controlling the flow of the heat transfer fluid through the primary-side flow path.
- the invention is based on the object of specifying a space-saving possibility of temperature determination which nevertheless delivers satisfactory results.
- the temperature is recorded directly in the return connection of the secondary flow path.
- the sensor is therefore able to determine the temperature of the process water that flows through the flow path where the heat transfer from the primary side to the secondary side is complete. With such a temperature sensor it is therefore possible to carry out a relatively quick and precise regulation of the heat supply to the fluid flowing through the secondary flow path.
- the temperature sensor also records changes relatively quickly, which do not result directly in the fluid flowing through the secondary-side flow path, but also in the environment, in particular on the primary side. These influences either act directly on the temperature sensor via the heat transfer surface arrangement when it is in contact with this heat transfer surface arrangement or with a slight delay if it is at a distance from it.
- a very quick response to a temperature change can be achieved.
- a direct influence of the temperature sensor by large metal masses that are present in the area of the fittings at the return connection is avoided. These large metal masses react much more slowly to changes in temperature. Accordingly, no primary liquid is required to heat these fittings. If, for example, the removal of process water from the secondary flow path is ended, the temperature sensor can heat up more quickly because it is better influenced by the primary side.
- the inlet connection, the outlet connection, the inlet connection and the return connection preferably form corner points of a square and the Temperature sensor is located inside the square. This ensures in a simple manner that the temperature influences can act on the temperature sensor from the primary side. The temperature sensor is therefore not "shadowed" by the return connection. If the temperature connections can also act on the temperature sensor from the primary side, faster control and, above all, fast closing of the valve on the primary side is possible.
- the primary-side flow path and the secondary-side flow path preferably have opposite flow directions. Since the temperature sensor is adjacent to the return connection of the secondary flow path, it is also exposed to the temperature at the inlet connection of the primary flow path due to the opposite flow directions through the two flow paths. In this way, when regulating the flow through the primary side, temperature influences from the primary side can also be taken into account without having to completely install the temperature sensor in the primary side.
- the rectangle preferably has a longer side and a shorter side starting from the return connection, the inlet connection delimiting the shorter side and the temperature sensor being arranged closer to the shorter side than to the longer side. This ensures that the temperature influence on the primary side is caused by a part of the heat transfer medium flowing through the primary side, which flows into the heat exchanger. By arranging the temperature sensor in relation to the inlet connection, the influence of the temperature sensor on the primary side can be weighted.
- the temperature sensor is preferably not connected to the wall of the return connection in a heat-conducting manner.
- the wall of the back barrel connector is usually made of a metal, such as brass. If the temperature sensor is not connected in a heat-conducting manner here, for example by virtue of the fact that it is at a small distance from this wall, then an immediate and relatively rapid influencing of the temperature sensor by the liquid at the outlet of the secondary-side flow path can be achieved. The influence of the larger metal masses with the correspondingly large thermal inertia, however, can be reduced.
- the temperature sensor is preferably designed as an electronic sensor.
- the electronic sensor therefore generates electrical signals that depend on its temperature. Such signals can then be easily further processed electrically, so that the flow can be regulated in an electrical manner.
- Other types of temperature sensors are possible.
- the temperature sensor is preferably arranged in a bore in the housing of the heat exchanger. This is a relatively easy way to place and assemble the temperature sensor.
- FIG. 2 shows a second embodiment of a heat exchanger in a schematic illustration
- FIG. 3 shows a schematic illustration to explain the thermal reaction
- Fig. 4 is a schematic representation to explain the position of the temperature sensor in the heat exchanger.
- a heat exchanger 1 which is shown only schematically in FIG. 1, has a housing 2 which has an inlet connection 3 and an outlet connection 4 of a primary-side flow path 5 shown with solid lines as well as an inlet connection 6 and a return connection 7 of a secondary-side flow path 8 shown in broken lines.
- the flow paths 5, 6 abut one another via a heat transfer surface arrangement 9.
- the primary-side flow path 5 and the secondary-side flow path 8 will be realized, for example, by laying corrugated or curved sheets on top of one another, so that a honeycomb structure is created in cross section. Some of these "honeycombs" then belong to the primary-side flow path 5, while the remaining “honeycombs” belong to the secondary-side flow path 8. The heat transfer surface arrangement is then formed by the walls of the honeycomb.
- the return connection 7 is connected to a hot water tap 10, which is represented here by a valve 11.
- a hot water tap 10 which is represented here by a valve 11.
- This water has a low temperature of, for example, 10 to 15 ° C. at the inlet connection 6 and should have a temperature of, for example, 50 ° C. at the tap. Accordingly, one has to ensure that sufficient heat is supplied through the primary-side flow path 5 in parallel with the removal of process water from the tap 10.
- a valve 12 is provided, which is controlled by a control device 13.
- the control device 13 receives temperature information from a temperature sensor 14 which is arranged at the return connection 7.
- the temperature sensor 14 is inserted into a bore 15 of the housing 2 in such a way that the temperature sensor 14 is located in the secondary flow path 8.
- This flow path is identified in FIG. 4 by the letters "K", while the primary-side flow path 5 in FIG. 4 is represented by the letters "W”.
- 4 also shows the heat transfer surface arrangement 9. 4 shows two possibilities for the arrangement of the temperature sensor 14, which are separated from one another by a dashed line. On the left side, the temperature sensor 14 is at a certain, small distance from the heat transfer surface arrangement 9.5 on the right side, it touches it. Both embodiments make it possible that the temperature sensor is also influenced by the temperature on the primary side.
- the inlet connection 3, the return or outlet connection 7, the outlet connection 4 and the inlet connection 6 form four corner points of a rectangle.
- the temperature sensor 14 is now arranged within this rectangle. It can also be seen that this rectangle has a short side and a long side. The short side is limited, for example, by the return connection 7 and the inlet connection 3.
- the temperature sensor 14 is arranged closer to the short side between the return port 7 and the inlet port 3 than to the long side between the return port 7 and the outlet port 4. Accordingly, the temperature sensor 14 is mainly affected by the temperature in the return port 7. It is also acted upon by the temperature of the heat transfer fluid flowing into the inlet connection 3. Part 5a of the primary side Flow path 5 is shown so that it runs close to the temperature sensor 14. Accordingly, the temperature sensor 14 is also acted upon to a certain extent by heat conduction from the temperature of the fluid on the primary side. Thermal radiation is of only minor importance here.
- the temperature sensor 14 is designed as an electronic sensor. In the simplest case, it is a PTC resistor whose resistance value changes depending on the temperature. Of course, semiconductor sensors are also possible, whose current / voltage behavior changes depending on the temperature.
- the temperature determined by the temperature sensor 14 is evaluated via the control device 13, which controls the valve 12 at the outlet connection 4 as a function of this temperature.
- the temperature sensor 14 does not require a lot of space, so that even when such a temperature sensor 14 is used, the size of the heat exchanger 1 does not have to be significantly increased.
- the temperature sensor 14 is not shadowed by the return connection 7. It will preferably be arranged at an angle of 45 ° to 90 ° to a connecting line between the return port 7 and the outlet port 4 or at an angle in the range of 0 to 45 ° to a line between the inlet port 3 and the return port 7. The choice of the angle also determines how large the influence of the temperature from the primary side on the control of the valve 12 is.
- FIG. 2 shows a modified embodiment of a heat exchanger 1.
- the temperature sensor 14 is no longer designed as an electronic sensor, but as a temperature sensor. It contains a filling, the volume of which changes depending on the temperature.
- the temperature sensor 14 is connected to the valve 12 via a capillary line 16.
- inlet connection 3 and the outlet connection 4 are arranged on the same side of the housing 2.
- the inlet connection 6 and the return connection 7 of the flow path 8 on the secondary side are arranged on the opposite side.
- connection area you will have a larger mass of metal and liquid. Here the temperature will only slowly balance itself out. However, if the temperature sensor 14 is at a distance from the fitting area, then no temperature from the primary side is required to heat this buffer.
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)
- Water Supply & Treatment (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Air Conditioning Control Device (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL05731241T PL1740888T3 (pl) | 2004-04-26 | 2005-04-21 | Wymiennik ciepła |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004020293A DE102004020293B4 (de) | 2004-04-26 | 2004-04-26 | Wärmetauscher |
PCT/DK2005/000275 WO2005103572A1 (de) | 2004-04-26 | 2005-04-21 | Wärmetauscher |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1740888A1 true EP1740888A1 (de) | 2007-01-10 |
EP1740888B1 EP1740888B1 (de) | 2016-11-30 |
Family
ID=34964724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05731241.5A Revoked EP1740888B1 (de) | 2004-04-26 | 2005-04-21 | Wärmetauscher |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1740888B1 (de) |
CN (1) | CN1946971B (de) |
DE (1) | DE102004020293B4 (de) |
DK (1) | DK1740888T3 (de) |
PL (1) | PL1740888T3 (de) |
RU (1) | RU2334929C2 (de) |
WO (1) | WO2005103572A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8505619B2 (en) | 1997-02-25 | 2013-08-13 | Sundsvall Energi Ab | Heat exchanger with temperature-controlled valve |
DE102004020293B4 (de) | 2004-04-26 | 2006-02-09 | Danfoss A/S | Wärmetauscher |
DK177914B1 (en) * | 2010-11-10 | 2014-12-15 | Danfoss As | Heating system with sensor accelerator |
SI2674697T1 (sl) | 2012-06-14 | 2018-11-30 | Alfa Laval Corporate Ab | Ploščni toplotni izmenjevalnik |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH672198A5 (de) | 1986-01-03 | 1989-10-31 | Vaillant Gmbh | |
SE515485C2 (sv) | 1999-12-08 | 2001-08-13 | Alfa Laval Ab | En värmeväxlaranordning och ett förfarande för reglering av ett fluidum genom en värmeväxlaranordning |
SE518475C2 (sv) * | 2001-02-20 | 2002-10-15 | Alfa Laval Ab | Plattvärmeväxlare med sensoranordning |
DE10123674B4 (de) * | 2001-05-16 | 2005-11-10 | Stahlwerk Ergste Westig Gmbh | Gleitkantenprofil |
JP3744409B2 (ja) * | 2001-11-14 | 2006-02-08 | ダイキン工業株式会社 | 熱交換器ユニット |
GB0128448D0 (en) | 2001-11-28 | 2002-01-16 | Gledhill Water Storage | Improvements relating to heating apparatus |
DE102004020293B4 (de) | 2004-04-26 | 2006-02-09 | Danfoss A/S | Wärmetauscher |
-
2004
- 2004-04-26 DE DE102004020293A patent/DE102004020293B4/de not_active Revoked
-
2005
- 2005-04-21 PL PL05731241T patent/PL1740888T3/pl unknown
- 2005-04-21 EP EP05731241.5A patent/EP1740888B1/de not_active Revoked
- 2005-04-21 DK DK05731241.5T patent/DK1740888T3/en active
- 2005-04-21 CN CN2005800125896A patent/CN1946971B/zh not_active Expired - Fee Related
- 2005-04-21 RU RU2006140220/06A patent/RU2334929C2/ru active
- 2005-04-21 WO PCT/DK2005/000275 patent/WO2005103572A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2005103572A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1740888B1 (de) | 2016-11-30 |
DE102004020293B4 (de) | 2006-02-09 |
CN1946971B (zh) | 2010-06-16 |
WO2005103572A1 (de) | 2005-11-03 |
DE102004020293A1 (de) | 2005-11-17 |
RU2006140220A (ru) | 2008-06-10 |
CN1946971A (zh) | 2007-04-11 |
PL1740888T3 (pl) | 2017-05-31 |
RU2334929C2 (ru) | 2008-09-27 |
DK1740888T3 (en) | 2017-03-13 |
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