WO1999012023A1 - Verfahren und vorrichtung zur bestimmung der konzentration eines flüssigeisgemisches - Google Patents
Verfahren und vorrichtung zur bestimmung der konzentration eines flüssigeisgemisches Download PDFInfo
- Publication number
- WO1999012023A1 WO1999012023A1 PCT/DE1998/002522 DE9802522W WO9912023A1 WO 1999012023 A1 WO1999012023 A1 WO 1999012023A1 DE 9802522 W DE9802522 W DE 9802522W WO 9912023 A1 WO9912023 A1 WO 9912023A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ice
- fluid
- heat exchanger
- concentration
- binary
- 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.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
Definitions
- the invention relates to a method and a device for determining the concentration of a liquid ice mixture.
- Liquid ice mixtures consist of suspensions or mixtures of ice crystals or pieces of ice in liquid (hereinafter referred to as "binary ice fluid"). Such two-phase fluids are used for cold transport, cold storage and cold use. With these fluids, it is important to have a precise knowledge of the ice concentration in order to maintain and / or determine all process parameters in the plants in which these liquid ice mixtures are used. The exact determination of the ice concentration in a binary ice fluid is difficult. The determination of the ice concentration by measuring the electrical conductivity, as is known from DE 43 25 793 C2, is not very precise and cannot be applied to any liquid. Viscosity measurements are difficult - if at all - to be carried out. The pressure drop over a specified distance is also not a suitable signal, since the viscosity of the liquid is based on the temperature, quantity and quality of additives.
- the reason for using a binary ice fluid is the latent energy (enthalpy of fusion) of the ice contained in the fluid. This enables the reduction of pipe cross sections, the reduction of pump energy, the reduction of energy storage and the reduction of heat exchanger surfaces.
- the latent energy of binary ice cannot be determined with temperature sensors, since the temperature of the binary ice in the melting area does not (or hardly changes). A different type of ice concentration determination is therefore necessary.
- ice concentration of binary ice is determined according to the "calorimetric" method.
- a volume of the binary ice is weighed and its temperature is determined.
- a second volume of sufficiently warm fluids is weighed and its temperature is determined. Then you mix both volumes and can use the mixing temperature to calculate the ice concentration if the mixture no longer contains ice.
- the object of the invention is to provide a method and a device for determining the concentration of a liquid ice, which is attached to a pipeline and can determine the concentration at least at short intervals. According to the invention, this is achieved by a method with the features of claim 1 or 2 and by a device with the features of claim 3.
- the proposed method and the suitable device allow the ice concentration to be determined automatically, continuously or discontinuously. It is possible to determine the ice concentration of binary ice in storage tanks and pipelines.
- a method for determining the ice concentration in a binary ice fluid in which a partial stream is first coupled out of the flow to be measured or the storage volume, and this outcoupling stream is introduced into a heat exchanger while measuring the inlet and outlet temperatures, where heating of the Fluid flow and a further return to the heat exchanger when again measuring the inlet and outlet temperatures of the return flow, the ice concentration is determined mathematically.
- Fig. 1 shows the cal atic structure of a device for ice concentration determination on a pipe
- Fig. 2 shows the arrangement of the device of Fig. 1 on a storage container.
- the pipeline 10 shown in FIG. 1 is provided with a device 12 for withdrawing a partial stream which discharges it into a pipeline 14.
- a temperature sensor 15 on the pipe 14 measures the temperature of the binary ice.
- the binary ice is then melted in a heat exchanger 16, the heat transferred in the heat exchanger 16 having to be large enough to completely melt the ice.
- Another temperature sensor 20 is provided on the pipeline at the outlet from the heat exchanger.
- the fluid then enters a second heat exchanger 22 in which it is further heated by an external heat source.
- This heat source can e.g. B., as shown in Fig. 1, be a further water cycle in which heated water enters (reference numeral 24) and exits again heated (reference numeral 26).
- the outcoupled partial flow is thereby warmed up from a temperature measured by the temperature sensor 20 to a higher temperature, which is measured by a further temperature sensor 28 before it re-enters the heat exchanger 16.
- the fluid in turn loses heat in the heat exchanger and exits at a lower temperature at a location 30.
- the outcoupled partial flow can now be returned to the main flow via a device 32 and mixed with the binary ice.
- the heated binary ice fluid is cooled in the heat exchanger 16, the binary ice ice flowing in the opposite direction being fluid melts (or warms), ie the enthalpy difference of the binary ice fluid flows between points A and B and C and D are the same, although different from the sign.
- the ice concentration is calculated using the following equation:
- x E (tc - t D - t B + t A ) • (cp fluid / h ice )
- a discontinuous measurement can be used if a continuous measurement would disturb the energy balance too much.
- the heat exchanger 22 can be heated both by heated fluid (for example water, possibly cooling water of the condenser of the refrigerator) or also electrically.
- heated fluid for example water, possibly cooling water of the condenser of the refrigerator
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020007002018A KR20010023378A (ko) | 1997-08-30 | 1998-08-27 | 액체 얼음 혼합물의 농도를 결정하는 장치 및 방법 |
| JP2000508975A JP2001515207A (ja) | 1997-08-30 | 1998-08-27 | 氷・液体混合物の濃度測定方法および装置 |
| CA002302318A CA2302318A1 (en) | 1997-08-30 | 1998-08-27 | Method and device for demonstrating a concentration of a fluid ice mixture |
| EP98952514A EP1010001A1 (de) | 1997-08-30 | 1998-08-27 | Verfahren und vorrichtung zur bestimmung der konzentration eines flüssigeisgemisches |
| US09/424,752 US6190036B1 (en) | 1997-08-30 | 1998-08-27 | Method and apparatus for determining the concentration of a liquid ice mixture |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19737983.4 | 1997-08-30 | ||
| DE19737983A DE19737983C2 (de) | 1997-08-30 | 1997-08-30 | Verfahren und Vorrichtung zur Bestimmung der Konzentration eines Flüssigeisgemisches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1999012023A1 true WO1999012023A1 (de) | 1999-03-11 |
Family
ID=7840737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1998/002522 Ceased WO1999012023A1 (de) | 1997-08-30 | 1998-08-27 | Verfahren und vorrichtung zur bestimmung der konzentration eines flüssigeisgemisches |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6190036B1 (de) |
| EP (1) | EP1010001A1 (de) |
| JP (1) | JP2001515207A (de) |
| KR (1) | KR20010023378A (de) |
| CA (1) | CA2302318A1 (de) |
| DE (1) | DE19737983C2 (de) |
| WO (1) | WO1999012023A1 (de) |
| ZA (1) | ZA987740B (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19948908C2 (de) * | 1999-10-11 | 2001-10-04 | Siemens Ag | Verfahren zur Bestimmung der Alkoholkonzentration in Brennstoffzellen sowie ein zu dessen Durchführung geeignetes Brennstoffzellensystem |
| DE10210991A1 (de) * | 2002-03-13 | 2003-10-16 | Joachim Paul | Wintersporthalle und Verfahren zu deren Betreiben |
| CN100439906C (zh) * | 2004-03-19 | 2008-12-03 | 中国科学院理化技术研究所 | 基于流体流动换热的圆柱型量热仪 |
| US20080285616A1 (en) * | 2006-12-22 | 2008-11-20 | Espec Corp. | System for testing the durability of objects under thermally hard circumstances |
| RU2720399C1 (ru) * | 2019-09-26 | 2020-04-29 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Юго-Западный государственный университет" (ЮЗГУ) | Способ измерения параметров фазового перехода жидкость-жидкость |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0466854A (ja) * | 1990-07-06 | 1992-03-03 | Takenaka Komuten Co Ltd | 氷含有流体供給システムにおける氷含有率測定方法およびそれに用いる装置 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3221541A (en) * | 1961-12-20 | 1965-12-07 | Entroputers Inc | Method of and apparatus for accurately and instantaneously determining the ratio of the constituents of a vapor-liquid-solid mixture or a mixture of any two of the components thereof |
| SE329025B (de) * | 1968-03-20 | 1970-09-28 | Lkb Produkter Ab | |
| DE2811945C3 (de) * | 1978-03-18 | 1982-01-14 | Kali-Chemie Ag, 3000 Hannover | Analysengerät |
| JPH04357446A (ja) * | 1991-03-01 | 1992-12-10 | Daikin Ind Ltd | 氷蓄熱装置に用いる製氷量測定方法および測定装置 |
| JPH04366731A (ja) * | 1991-06-14 | 1992-12-18 | Mitsubishi Electric Corp | 氷蓄熱槽のレベル検出装置 |
| US5386718A (en) * | 1992-06-02 | 1995-02-07 | Marathon Oil Company | Method for fluid analysis |
| DE4325794C1 (de) * | 1993-07-31 | 1994-10-06 | Integral Technologie Gmbh | Verfahren zur Eiskonzentrationsmessung |
| DE4325793C2 (de) * | 1993-07-31 | 1997-07-17 | Integral Technologie Gmbh | Verfahren zur Messung einer Eiskonzentration und Vorrichtung zur Durchführung des Verfahrens |
| US5980102A (en) * | 1994-06-20 | 1999-11-09 | Columbia Gas Of Ohio | Method for measuring physical characteristics in a pipeline without tapping |
-
1997
- 1997-08-30 DE DE19737983A patent/DE19737983C2/de not_active Expired - Fee Related
-
1998
- 1998-08-26 ZA ZA987740A patent/ZA987740B/xx unknown
- 1998-08-27 WO PCT/DE1998/002522 patent/WO1999012023A1/de not_active Ceased
- 1998-08-27 JP JP2000508975A patent/JP2001515207A/ja not_active Ceased
- 1998-08-27 US US09/424,752 patent/US6190036B1/en not_active Expired - Fee Related
- 1998-08-27 CA CA002302318A patent/CA2302318A1/en not_active Abandoned
- 1998-08-27 KR KR1020007002018A patent/KR20010023378A/ko not_active Abandoned
- 1998-08-27 EP EP98952514A patent/EP1010001A1/de not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0466854A (ja) * | 1990-07-06 | 1992-03-03 | Takenaka Komuten Co Ltd | 氷含有流体供給システムにおける氷含有率測定方法およびそれに用いる装置 |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 016, no. 264 (P - 1370) 15 June 1992 (1992-06-15) * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001515207A (ja) | 2001-09-18 |
| CA2302318A1 (en) | 1999-03-11 |
| KR20010023378A (ko) | 2001-03-26 |
| ZA987740B (en) | 1999-01-19 |
| US6190036B1 (en) | 2001-02-20 |
| EP1010001A1 (de) | 2000-06-21 |
| DE19737983A1 (de) | 1999-03-11 |
| DE19737983C2 (de) | 1999-08-12 |
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