WO2006011212A1 - 熱交換方法及び熱交換器 - Google Patents
熱交換方法及び熱交換器 Download PDFInfo
- Publication number
- WO2006011212A1 WO2006011212A1 PCT/JP2004/010823 JP2004010823W WO2006011212A1 WO 2006011212 A1 WO2006011212 A1 WO 2006011212A1 JP 2004010823 W JP2004010823 W JP 2004010823W WO 2006011212 A1 WO2006011212 A1 WO 2006011212A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat
- heater
- molded body
- heat transfer
- resistant material
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/08—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being steam
- F22B1/10—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being steam released from heat accumulators
-
- 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
- F24H3/00—Air heaters
- F24H3/002—Air heaters using electric energy supply
- F24H3/004—Air heaters using electric energy supply with a closed circuit for a heat transfer liquid
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
- F28F2265/30—Safety or protection arrangements; Arrangements for preventing malfunction for preventing vibrations
Definitions
- the present invention relates generally to heating using an electric heater, a heater using a combustion exhaust obtained by burning kerosene / heavy oil or gas fuel as a heat source, a heat exchanger using a heater using a high-temperature steam as a heat source, etc.
- the present invention relates to a heat exchanging method and a heat exchanging apparatus that can suppress occurrence of abnormal noise and vibration at the time. Specifically, it is characterized by (1) a hot water heating part such as a hot water machine, and (2) a heat exchange part such as a steam generator.
- heating heaters using kerosene / heavy oil or gas exhaust as a heat source, heating heaters using a high temperature steam as a heat source, etc. are used under normal pressure or reduced pressure.
- the heat transfer device that heats the heat transfer fluid is placed in the heat transfer device and the heater is immersed in the heat transfer fluid. Is often used.
- Patent Document 3 a heat exchanger that silences the heat transfer tube by providing an expansion volume and a small hole
- Patent Document 4 a baffle plate in the flow path of the heat transfer medium, and the flow of steam bubbles generated by boiling
- Patent Document 4 A device that controls the flow of condensed water and silences it
- Patent Document 4 a method of preventing the shock wave of the heat medium caused by boiling from directly colliding with the side wall of the can
- Patent Document 1 Japanese Utility Model Publication No. 57-150301
- Patent Document 2 JP-A-60-144503
- Patent Document 3 Japanese Patent Laid-Open No. 9-159379
- Patent Document 4 JP-A-8-189605
- Patent Document 5 JP-A-8-219402
- the present invention provides heating using an electric heater, a heater using a kerosene fuel oil or a combustion exhaust burned with gas fuel as a heat source, a heater using a high-temperature steam as a heat source, etc.
- a heat exchanging method and a heat exchanging apparatus that can effectively suppress the occurrence of abnormal noise and vibration during heating, can be manufactured at low cost, and has low maintenance costs. Let it be an issue.
- the present inventor can suppress the occurrence of abnormal noise and vibration during heating by suppressing rapid convection and heat transfer of the heat transfer fluid near the heater, and can solve the conventional problems. Obtained with the knowledge.
- the present invention is based on this finding,
- a heater is placed in the heat transfer medium to be heated, and a plurality of heat-resistant material molded bodies that allow a flow gap of the heat transfer medium are filled around the heater of the heat transfer liquid to be heated.
- the present invention also provides:
- a heat exchanger heated by a heat medium liquid heater the heater is placed in the heat medium liquid to be heated, and the heat medium liquid is circulated around the heater of the heat medium liquid to be heated.
- Heat exchanger characterized by suppressing the generation of abnormal noise and vibration during heating by filling a molded body made of a plurality of heat-resistant materials with gaps
- thermoplastic material is at least one material selected from ceramics, metal, and heat-resistant resin.
- the molded body made of a heat-resistant material is in the shape of a ball, cylinder, or bowl, 3 Heat exchanger according to 9
- the present invention is a method of molding a plurality of heat-resistant materials in which a heater is disposed in a heated heat medium liquid and a heat medium liquid circulation gap is formed around the heater of the heated heat medium liquid.
- the body is filled, and the convection transfer and convection heat transfer of the heat transfer fluid are suppressed by this compact.
- This simple structure makes it possible to reduce the temperature difference between the heat medium temperature near the heater in the heat medium liquid and the heat medium liquid temperature around the heater immediately after the start of heating. Abnormal noise and vibration can be effectively suppressed.
- the heat exchanging method and heat exchanging apparatus of the present invention can be manufactured at a low cost because it is only necessary to fill a molded product made of an inexpensive heat-resistant material around the heater or replace a deteriorated molded product. It has an excellent effect that the maintenance cost is low.
- FIG. 1 An electric heater is disposed in a rectangular parallelepiped heat exchange device, and a heat transfer fluid such as water is placed inside the heat exchange device, and a spherical or other molded body made of a heat-resistant material is placed in the heat transfer fluid.
- FIG. 6 is an explanatory view showing an example of the present invention filled with slag.
- FIG. 2 is a diagram showing a correlation between a heat medium liquid temperature and a noise value in a heat exchange device at the time of receiving (conventional) and filling a compact in the heat exchanger shown in FIG.
- FIG. 4 Heat in the heat exchanger when passing through the heat exchanger shown in Fig. 3 (conventional), filling the compact to the liquid level of the heat transfer fluid, and filling the compact to the level above the heat transfer fluid level It is a figure which shows the correlation of a liquid medium temperature and a noise value.
- FIG. 5 is an explanatory diagram when the heat-resistant molded product is not filled up to the bottom of the heat exchanger.
- FIG. 6 is an explanatory diagram when the molded body is not filled in the heat exchanger bottom and outer peripheral parts.
- FIG. 7 is an explanatory diagram showing a specific example (outer appearance) of a heat exchanger.
- FIG. 8 is a schematic view in which a molded product (filler) of the present invention is introduced into a heat exchange device located below the panel body.
- the heat transfer fluid near the heater becomes locally hot, the heat transfer fluid boils (vaporizes), and the generated bubbles expand rapidly.
- the bubbles come into contact with a relatively low temperature heat transfer fluid around the heater, the bubbles disappear instantly due to a temperature drop.
- the sound generated at this time causes abnormal noise (explosive noise) and vibration.
- the present invention suppresses convective movement and convective heat transfer of the heat medium liquid by filling the heat medium liquid with a molded body made of a heat-resistant material, and the heat medium liquid temperature near the heater immediately after the start of heating.
- the present invention suppresses convective movement and convective heat transfer of the heat medium liquid by filling the heat medium liquid with a molded body made of a heat-resistant material, and the heat medium liquid temperature near the heater immediately after the start of heating.
- the heat medium liquid by filling the heat medium liquid with a molded body made of a heat-resistant material, reducing the convective movement of the heat medium liquid, and reducing the temperature difference between the heat medium liquid temperature near the heater and the heat medium liquid around the heater,
- the bubbles of the heat transfer fluid generated on the heater surface are not rapidly cooled, and it is possible to suppress the occurrence of abnormal noise, vibration, and the like accompanying the rapid disappearance of the bubbles.
- the presence of a molded body made of a heat-resistant material filled in the heat transfer fluid has a function of suppressing bubble growth. That is, the bubbles are lifted or diffused by sewing (passing) through the gaps of the molded body made of the heat-resistant material. Limited to the following sizes: In this way, the generation of large bubbles is suppressed, and the implosion sound that accompanies the rapid disappearance of the bubbles is significantly reduced due to the reduction in the diameter of the bubbles.
- Fig. 1 shows that the electric heater 1 is arranged in a rectangular parallelepiped heat exchanger and water or the like is placed inside the heat exchanger.
- the heat medium liquid 2 is put, and the heat medium liquid is filled with a molded body 3 such as a sphere made of a heat-resistant material.
- the electric heater for heating the heat transfer liquid is controlled by a signal from a heat transfer liquid temperature sensor such as a thermocouple.
- the bubbles of the heat transfer fluid generated near the heater move upward due to buoyancy, but gradually become smaller because there is no sudden temperature change in the heat transfer fluid (does not contact the low temperature heat transfer fluid). Disappear. For this reason, the bubbles of the heat transfer liquid generated in the vicinity of the heater do not disappear rapidly, and it is possible to effectively suppress the generation of abnormal noise and vibration accompanying the rapid disappearance of the bubbles.
- FIG. 2 shows the noise value of the heat exchange device when this device is used.
- "when compacted" B is when ⁇ 3 ceramic compact is filled, and "normally” A is filled with heat transfer fluid (water) only inside the heat exchange device and heat resistant.
- the noise value is shown when the molded product is filled with rust, and when it is filled.
- Normal time A which is not filled with the molded body, generates abnormal noise accompanying the disappearance of the heat transfer liquid bubbles in the temperature range of 20-60 ° C, but this abnormal noise is effective by filling the molded body. Can be suppressed. Note that the noise level rises in the temperature range above 70 ° C due to the boiling temperature of the heat transfer medium.
- a ceramic molded body (ball) having a diameter of 6 mm can be filled in the heat transfer liquid.
- the compact (ball) made of ceramics with a diameter of 2 mm to 6 mm is used as the compact to be filled in the heat transfer fluid.
- the size of the molded body is a typical example, and is not limited to this size. For example, it is possible to design a compact having a smaller size or a larger size. Further, the size of the molded body can be arbitrarily changed depending on the size of the heat exchanger. Furthermore, a mixture of large and small shaped bodies may be used. The present invention includes all of these. As the shape of the molded body, a spherical shape (ball), a cylindrical shape (Raschig ring), a saddle shape (berle saddle), or the like can be used. These can uniformly open an appropriate space for the heat transfer fluid, and can effectively suppress rapid convection of the heat transfer fluid. However, these shapes are preferable examples, and other shapes are not limited as long as the object of the present invention can be achieved.
- the material of the molded body is a material that can withstand the temperature of the heater surface (about 200 ° C), a ceramic material, a metal material such as iron copper, aluminum, or a heat-resistant resin material is used. That power S.
- a material that is light in weight but other materials may be used as the material of the molded body as long as the object of the present invention can be achieved.
- the heating means of the heater used by the heat exchanger can be electricity, steam, combustion exhaust gas (by combustion of combustible fuel such as gas, kerosene, heavy oil). If this heating means can also achieve the object of the present invention, other heating means may be used. There are no particular restrictions.
- FIG. 3 shows a specific example.
- the one shown in FIG. 3 is a product in which the heat-resistant molded body 3 is filled up to the upper part (about 15 mm) of the heat transfer liquid surface.
- Many of the bubbles in the heat transfer fluid 2 generated in the vicinity of the heater 1 gradually shrink and disappear during the upward movement in the heat transfer fluid due to the buoyancy of the bubbles.
- the bubbles in the heat transfer fluid 2 pass through the vicinity of the heater 1 even in the upward movement process, so that the bubbles grow significantly (giant into bubbles).
- Such giant bubbles do not sufficiently shrink and disappear during the upward movement in the heat transfer fluid 2 and reach the surface of the heat transfer fluid 2.
- the temperature above the heat transfer solution 2 is clearly low. A significant temperature difference occurs.
- the heat-resistant molded body 3 is filled up to about 15 mm above the heat transfer liquid surface. This dimension can be arbitrarily determined according to the size and shape of the heat exchanger, and is not particularly limited.
- FIG. 4 shows a normal state and a filled state of the heat-resistant molded body 3 shown in FIG. 3 above (15 mm) above the liquid surface of the heat transfer medium (filling up to the liquid level and the liquid level). Comparison of noise values of heat exchangers for 2 cases of compacts up to 15mm above is shown.
- the heater output was increased as a condition for the purpose of improving the heating rate, compared to the examples shown in FIGS.
- the abnormal noise during extinction of the heat transfer fluid bubbles is greatest during normal operation (when the molded product is filled and not: symbol C).
- symbol D abnormal noise is reduced compared to the normal time, but giant bubbles are generated as the heater output increases. The noise level does not decrease sufficiently because it reaches the surface and generates a disappearing sound.
- Figure 5 shows the heat-resistant molded product not filled to the bottom of the heat exchanger. In the vicinity of the bottom of the heat exchanger, bubbles are generated in the heat transfer fluid. Therefore, it is possible to prevent the molded body from being filled in the lower part of the heat exchanger.
- the fixing (holding) member 4 of the molded body it is convenient to use a mesh (net-like body), but it is not always necessary to use a mesh.
- a mesh net-like body
- it can be a lattice. In either case, since the heat transfer fluid is always touched, it is necessary to have strength, heat resistance and corrosion resistance for holding the molded body 3.
- FIG. 6 is a further improvement of FIG. Generation of bubbles in the heat transfer fluid
- the bottom and outer periphery of the heat exchanger that do not participate in the 'reduction' disappearance are not filled with the molded product.
- the weight of the molded body 3 can be further reduced to reduce the cost of the molded body 3 and the weight of the heat exchanger.
- the fixing (holding) member 4 of the molded body As the fixing (holding) member 4 of the molded body, the same one as described above can be used.
- a simple joining member (not shown) coupled to the heat exchanger can be used.
- FIG. 7 shows a specific example (outer appearance) of a heat exchanger.
- FIG. 8 shows a schematic diagram in which the molded body (filler) 3 of the present invention is introduced into the heat exchange device 6 located below the panel body 5.
- reference numeral 7 is a heater power supply connection
- reference numeral 8 is a steam introduction pipe
- reference numeral 9 is a steam introduction header
- reference numeral 10 is a water surface
- reference numeral 11 is a network for holding a molded body
- reference numeral 12 is an electric power.
- reference numeral 13 indicates steam
- reference numeral 14 indicates condensed water.
- FIGS. 7 and 8 shows a case in which the molded body 3 is filled up to the upper part of the water surface, and it is possible to effectively suppress the occurrence of abnormal noise and vibration during heating.
- the panel heater shown in FIG. 7 has a known structure. In this example, it can be easily understood that it is only necessary to fill the molded body without changing the heat exchanger. That is, it has an excellent effect that the manufacturing cost is low and the maintenance cost is also low.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Details Of Fluid Heaters (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2004/010823 WO2006011212A1 (ja) | 2004-07-29 | 2004-07-29 | 熱交換方法及び熱交換器 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2004/010823 WO2006011212A1 (ja) | 2004-07-29 | 2004-07-29 | 熱交換方法及び熱交換器 |
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WO2006011212A1 true WO2006011212A1 (ja) | 2006-02-02 |
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PCT/JP2004/010823 WO2006011212A1 (ja) | 2004-07-29 | 2004-07-29 | 熱交換方法及び熱交換器 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009216278A (ja) * | 2008-03-10 | 2009-09-24 | Koono:Kk | 熱交換器 |
JP2013137188A (ja) * | 2013-02-05 | 2013-07-11 | Koono:Kk | 熱交換器 |
WO2014068610A1 (ja) * | 2012-10-30 | 2014-05-08 | 株式会社コーノ | 減圧蒸気発生器 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4960029A (ja) * | 1972-09-20 | 1974-06-11 | ||
JPS63126705A (ja) * | 1986-11-18 | 1988-05-30 | Plast Kogaku Kenkyusho:Kk | 造粒装置 |
-
2004
- 2004-07-29 WO PCT/JP2004/010823 patent/WO2006011212A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4960029A (ja) * | 1972-09-20 | 1974-06-11 | ||
JPS63126705A (ja) * | 1986-11-18 | 1988-05-30 | Plast Kogaku Kenkyusho:Kk | 造粒装置 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009216278A (ja) * | 2008-03-10 | 2009-09-24 | Koono:Kk | 熱交換器 |
WO2014068610A1 (ja) * | 2012-10-30 | 2014-05-08 | 株式会社コーノ | 減圧蒸気発生器 |
JP5960276B2 (ja) * | 2012-10-30 | 2016-08-02 | 株式会社コーノ | 減圧蒸気発生器 |
JP2013137188A (ja) * | 2013-02-05 | 2013-07-11 | Koono:Kk | 熱交換器 |
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