CN113739959B - Method for measuring heat flux density of steam pipe network - Google Patents
Method for measuring heat flux density of steam pipe network Download PDFInfo
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- CN113739959B CN113739959B CN202110971020.3A CN202110971020A CN113739959B CN 113739959 B CN113739959 B CN 113739959B CN 202110971020 A CN202110971020 A CN 202110971020A CN 113739959 B CN113739959 B CN 113739959B
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000004907 flux Effects 0.000 title claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 83
- 238000004321 preservation Methods 0.000 claims abstract description 45
- 238000005485 electric heating Methods 0.000 claims abstract description 31
- 238000009413 insulation Methods 0.000 claims abstract description 21
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 238000009529 body temperature measurement Methods 0.000 claims description 21
- 239000000523 sample Substances 0.000 claims description 14
- 238000005192 partition Methods 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000009826 distribution Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001739 density measurement Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K17/00—Measuring quantity of heat
- G01K17/06—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device
- G01K17/08—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device based upon measurement of temperature difference or of a temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The application discloses a method for determining heat flux density of steam pipe network, relates to the technical field of heat flux density determination of heat preservation pipelines, and comprises the following steps: s1, setting an experimental device; s2, measuring the length; s3, connecting an ammeter; s4, starting the experimental device; s5, adjusting the temperatures of all the electric heating elements to be set values; s6, measuring and recording the consumption of electric energy by the electric heating element by using an ammeter K1; s7, continuously heating to a stable state; s8, recording the numerical values displayed on the digital display screen of each electronic thermometer once every one hour, recording the electric energy displayed by the ammeter K1, and recording the steady state measurement time T; s9, calculating electric energy W consumed by the main heating section, calculating measurement time T, and calculating power consumed by the electric heating element according to N=W/T; again according to q=n =and/L, calculating the heat flux density of the heat insulation pipe. The heat flow density measuring device has the effects of improving convenience and safety in measuring heat flow density of a heat supply pipe network and reducing production cost of enterprises.
Description
Technical Field
The application relates to the technical field of heat flux density measurement of heat-insulating pipelines, in particular to a method for measuring heat flux density of a steam pipe network.
Background
In the operation process of the heat distribution pipe network, the heat preservation effect of the corresponding heat distribution pipe network is generally evaluated by measuring the heat flow density in the heat distribution pipe network within a certain time.
In the related art, the heating power steam pipe network comprises a working pipe for conveying high-temperature medium (steam or hot water), wherein an outer protecting pipe is coaxially sleeved outside the working pipe, and the outer protecting pipe is used for reducing the influence of external factors on the working pipe and prolonging the service life of the working pipe; meanwhile, in order to reduce heat loss in the high-temperature medium conveying process, a heat insulation material is filled between the working pipe and the outer protective pipe to form a heat insulation layer; when the heat flux density of the heating power steam pipe network is measured, a worker adjusts the temperature of steam or hot water to enable the heating temperature to reach a set value, and then the heat energy passing through the unit area in unit time is measured.
By adopting the technical scheme, because the temperature of steam or hot water is not well regulated and controlled, the difficulty of controlling the steam generating set parameters in a laboratory is high, the danger coefficient is high, and special high-precision experimental equipment is required to be used, so that the production cost of enterprises is high, the direct measurement of the steam heat in a thermal steam pipe network is inconvenient, and the problem to be improved exists.
Disclosure of Invention
In order to improve convenience and safety of measuring the heat flow density in a heating power steam pipe network and reduce the production cost of enterprises, the application provides a method for measuring the heat flow density of the steam pipe network.
The application provides a method for determining the heat flux density of a steam pipe network, which adopts the following technical scheme:
a method for determining heat flux density of a steam pipe network, comprising the steps of:
s1, setting an experimental device: an electric heating element is arranged in the working tube; two heat preservation partitions are arranged in the working tube at intervals, and two ends of the working tube are closed to form a main heating section positioned in the middle of the working tube and heating compensation sections positioned at two ends of the working tube; the temperature measuring points are respectively arranged on the outer side walls of the main heating section and the two heating compensation sections and the inner cavities of the main heating section and the two heating compensation sections, and the temperature sensing probes of the electronic thermometer are fixed at the corresponding temperature measuring points; then coaxially coating a plurality of heat preservation layers outside the working pipe, and sleeving an outer protection pipe outside the outermost heat preservation layer;
s2, measuring the length: measuring the length L of the main heating section;
s3, electrically connecting an electric heating element of the main heating section with an electric meter K1;
s4, starting the experimental device;
s5, adjusting the temperature of all the electric heating elements to be the steam parameter temperature value to be simulated;
s6, measuring and recording the electric energy consumed by the electric heating element of the main heating section by using an electric meter K1;
s7, heating for a certain time until the temperature value of the corresponding temperature measuring point of the main heating section and the temperature value of the corresponding temperature measuring point of the two heating compensation sections are close to the designed temperature value, and the values are stable; meanwhile, the value of the electricity meter K1 increased every hour is equal;
s8, recording the numerical values displayed on the digital display screen of each electronic thermometer every other hour, recording the consumed electric energy displayed by the electric meter K1, and recording the steady state measurement time T;
s9, calculating final steady state measurement time T, calculating electric energy W consumed in the steady state measurement process of the main heating section, and calculating power consumed by the electric heating element according to N=W/T; then according to q=n =and/L, calculating the heat flux density of the heat insulation pipe.
By adopting the technical scheme, the two ends of the working pipe are sealed, the working pipe is divided into the main heating section positioned in the middle of the working pipe and the heating compensation sections positioned at the two ends of the working pipe by using the heat preservation partition, and the electric heating element is used for replacing steam to provide required high temperature, so that the temperature state of the main heating section can be in the working state of an actual steam pipe network for a long time, the actual steam pipe network is simulated by the main heating section, an experimenter can measure the heat flow density of the actual steam pipe network in a laboratory, and the convenience for measuring the heat flow density of the actual steam pipe network is improved; meanwhile, the electric heating element is used for replacing steam to provide the required high temperature, and the electric heating mode is used for replacing steam to supply heat, so that the temperature for generating the set parameters can be conveniently controlled in a laboratory, and compared with the control of the steam for generating the set parameters, the method has the advantages of stronger operability and more convenient and safer detection process; and the whole device has simple structure and is beneficial to reducing the production cost of enterprises.
Preferably, in S1, the electric heating element is an electric heating sheet, and the electric heating sheet is closely attached to the inner wall of the working tube.
By adopting the technical scheme, the electric heating plate has good high temperature resistance, and is convenient for realizing the high temperature required by experiments; meanwhile, the electric heating sheet is tightly attached to the inner wall of the working tube, so that the uniform heating of the inner wall of the working tube is guaranteed, the occurrence of cracking of the working tube due to uneven heating is reduced, and the normal running of an experiment is guaranteed.
Preferably, in S1, two ends of the working tube are respectively fixed with a thermal insulation end seal, and any thermal insulation end seal respectively seals a corresponding pipe orifice of the working tube.
Through adopting above-mentioned technical scheme, heat preservation end seal has good heat preservation effect, uses heat preservation end seal to seal the both ends mouth of pipe of work pipe, helps reducing the heat in the heating compensation section and looses from both ends mouth of pipe, helps reducing the energy consumption.
Preferably, the thickness of any thermal insulation end seal is greater than or equal to the total thickness of a plurality of thermal insulation layers.
Through adopting above-mentioned technical scheme, set the thickness that keeps warm the end and seal to be the total thickness of a plurality of layers of heat preservation, make the interior temperature of working tube be equal to or less than the volume that the interior temperature of working tube is from the volume that the heat preservation was located of losing of heat preservation, help promoting the uniformity of device and actual steam pipe network operational environment, and then effectively promote the accuracy of the heat flux density that uses the device to survey.
Preferably, S1 specifically includes:
s1.1, presetting a temperature measuring point A on the outer surface of any heating compensation section, uniformly and alternately arranging a plurality of temperature measuring points A on the outer surface of the corresponding heating compensation section, and respectively fixing temperature sensing probes of a plurality of electronic thermometers at the corresponding temperature measuring points A;
s1.2, a plurality of temperature measuring points B are preset in the cavity in the heating compensation section, and the temperature measuring points B are uniformly distributed in the cavity in the heating compensation section, so that temperature sensing probes of a plurality of electronic thermometers are respectively fixed at the corresponding temperature measuring points B;
s1.3, presetting a temperature measuring point C on the outer surface of the main heating section, uniformly arranging a plurality of temperature measuring points C on the outer surface of the main heating section, and respectively fixing temperature sensing probes of a plurality of electronic thermometers at the corresponding temperature measuring points C;
s1.4, a plurality of temperature measuring points D are uniformly distributed in the cavity in the main heating section, and the temperature sensing probes of the electronic thermometers are respectively fixed at the corresponding temperature measuring points D.
Through adopting above-mentioned technical scheme, with temperature measurement point A, temperature measurement point B, temperature measurement point C, temperature measurement point D at the corresponding interval equipartition of work pipe be equipped with a, increase sample quantity, help promoting the accuracy of corresponding measured data in the experimental process, and then promote the accuracy of experimental result.
Preferably, in S1.1, any temperature measuring point A is not less than 100mm away from the working pipe orifice.
By adopting the technical scheme, as the heat at the position of the heating compensation section close to the pipe orifice of the working pipe is dissipated from the heat-preserving end seal to the external environment too much, the temperature at the position of the heating compensation section close to the pipe orifice of the working pipe is always lower than the temperature at the position of the heating compensation section away from the pipe orifice of the working pipe in the length direction; the arrangement position of the temperature measuring point A is not less than 100mm away from the orifice of the working pipe, so that the temperature measuring point A is far away from the orifice of the working pipe, and the comparison between the temperature value measured at the temperature measuring point A and the temperature value in the actual steam pipe network is ensured.
Preferably, in S1.3, the distance between any temperature measuring point C and the insulation partition is not less than 100mm.
By adopting the technical scheme, the heat at the position of the main heating section close to the heat preservation partition is conducted to the heat preservation partition, so that the temperature of the position of the main heating section close to the heat preservation partition is lower than the temperature of the middle part of the main heating section; the arrangement position of the temperature measuring point C is separated from the heat preservation by a certain length, so that the consistency of the temperature value measured at the temperature measuring point C and the temperature of the outer wall of the actual steam pipe network working pipe is improved, and the rigor of the experimental process is ensured.
Preferably, in S1, temperature measurement points E1 to Ei are sequentially arranged between adjacent heat insulation layers, a temperature measurement point F is arranged on the outer side surface of the heat insulation layer of the outermost layer, the temperature measurement points E1 to Ei and the temperature measurement point F are all arranged in the main heating section, then temperature sensing probes of a plurality of electronic thermometers are respectively fixed at the temperature measurement points E1 to Ei and the temperature measurement point F, and a plurality of temperature measurement points E1 to Ei are uniformly arranged on the circumference between the corresponding heat insulation layers.
Through adopting above-mentioned technical scheme, set up temperature measurement station E1-Ei and temperature measurement station F, measure the temperature value between the adjacent heat preservation and the temperature value of outside heat preservation lateral surface outside, the experimenter can judge the heat preservation effect of each temperature layer according to the temperature difference between each temperature layer, and then the experimenter of being convenient for constantly adjusts the material, the structure etc. of heat preservation, promotes the heat preservation effect of steam pipe network heat preservation.
Preferably, a plurality of temperature measuring points E1-Ei are uniformly distributed on the circumference between the corresponding heat insulation layers, and a plurality of temperature measuring points F are uniformly distributed on the circumference of the outer surface of the outermost heat insulation layer.
By adopting the technical scheme, a plurality of temperature measuring points E1-Ei and temperature measuring points F are uniformly distributed, so that the number of samples is increased, the accuracy of temperature value measurement between adjacent temperature layers is improved, and the accuracy of the judgment of the heat preservation effect of each heat preservation layer by experimenters is improved.
Preferably, in S7, heating is performed for a certain time until the values of the temperature measurement point a and the temperature measurement point C are close to the preset temperature value, the values of the temperature measurement point B and the temperature measurement point D are stable, the device continues to operate after the values are stable, and then the measured values are recorded.
By adopting the technical scheme, after the experimental device is started and heated for a period of time, when the temperature values measured by the temperature measuring point A and the temperature measuring point C are close to the preset temperature value, the values are stable; when the values of the temperature measuring point B and the temperature measuring point D are close to the preset temperature value and the values are stable, the temperature state of the main heating section reaches a state consistent with the actual steam pipe network, the stable measuring state is easy to judge in the experimental process, and experimental operation is convenient for experimental staff.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the working pipe, the heat-insulating partition and the heat-insulating end seal are used for simulating the heating network pipe, and the electric heating sheet is used for replacing steam to provide required heat, so that an experimenter can control the temperature generating set parameters in a laboratory, and the detection process is more convenient and safer; in addition, the experimental device is simple in structure, and the production cost of enterprises is effectively saved;
2. the temperature measuring point A, the temperature measuring point B, the temperature measuring point C, the temperature measuring point D and the temperature measuring points E1-Ei are all set to be a plurality of, and a comparison group is established, so that the temperature in each section of the working pipe in the experimental process is ensured to be in a normal and stable state, and the accuracy of the measured heat flux density of the steam pipe network is further effectively ensured;
3. the pipe orifice of the working pipe is sealed by the heat preservation end seal, the thickness of the heat preservation end seal is not smaller than the total thickness of a plurality of heat preservation layers, and the consistency of the device and the working environment of an actual steam pipe network is improved, so that the accuracy of the heat flow density measured by the device is further improved.
Drawings
Fig. 1 is a cross-sectional view of an experimental apparatus for determining heat flux density of a steam pipe network according to an embodiment of the present application.
FIG. 2 is a flow chart that generally embodies the method of determining heat flux density of a steam pipe network in an embodiment of the present application.
Reference numerals: 1. a working tube; 11. a main heating section; 12. heating the compensation section; 2. an electric heating plate; 3. insulating and isolating; 4. a heat preservation layer; 5. an outer protective tube; 6. and (5) heat preservation end sealing.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-2.
The present examples disclose a method for determining the heat flux density of a steam pipe network, but embodiments of the present invention are not limited thereto.
Referring to fig. 1 and 2, a method for determining heat flux density of a steam pipe network, comprising the steps of:
s1, setting an experimental device: an electric heating sheet is arranged in the working tube; two heat preservation partitions are arranged in the working tube at intervals, and two ends of the working tube are closed to form a main heating section positioned in the middle of the working tube and heating compensation sections positioned at two ends of the working tube; the outer side walls of the main heating section and the two heating compensation sections and the inner cavities of the main heating section and the two heating compensation sections are respectively provided with temperature measuring points, and the temperature sensing probes of the electronic thermometer are fixed at the corresponding temperature measuring points; and a plurality of heat preservation layers are coaxially coated outside the working pipe, and an outer protection pipe is sleeved outside the outermost heat preservation layer.
S1.1: fixing heat preservation end seals at two ends of the working pipe respectively, so that the two heat preservation end seals respectively seal corresponding pipe orifices of the working pipe;
s1.11: the thickness of any heat preservation end seal is larger than or equal to the total thickness of a plurality of heat preservation layers;
s1.2: at least four temperature measuring points A are distributed on the outer surface of any heating compensation section;
s1.21: setting any temperature measuring point A to be no less than 100mm away from a working pipe orifice;
s1.3: at least four temperature measuring points B are uniformly distributed at intervals in the cavity inside the heating compensation section;
s1.4: at least four temperature measuring points C are uniformly distributed on the outer surface of the main heating section at intervals;
s1.41: the distance between any temperature measuring point C and the thermal insulation partition is not less than 100mm;
s1.5: at least four temperature measuring points D are uniformly distributed at intervals in the cavity inside the main heating section;
s1.5: temperature measuring points E1-Ei are sequentially distributed between adjacent heat insulation layers, the temperature measuring points E1-E3 are all arranged in the main heating section, and at least four temperature measuring points E1-Ei are uniformly distributed on the circumference between the corresponding heat insulation layers;
s1.6: at least four temperature measuring points F are uniformly distributed on the outer side surface of the heat preservation layer at intervals;
s2, measuring the length: measuring the length L of the main heating section;
s3, electrically connecting an electric heating element of the main heating section with an electric meter K1;
s4, starting the experimental device;
s5, adjusting the temperature of all the electric heating elements to be the steam parameter temperature value to be simulated;
s6, measuring and recording the electric energy consumed by the electric heating element of the main heating section by using an electric meter K1;
s7, heating for a certain time until the numerical values of the temperature measuring point A and the temperature measuring point C are close to the design temperature value, and after the numerical values of the temperature measuring point B and the temperature measuring point D are close to the design temperature value and are stable; meanwhile, after the number of the electric meter K1 increased per hour is equal, the device is continuously operated;
s8, recording the numerical values displayed on the digital display screen of each electronic thermometer every other hour, recording the consumed electric energy displayed by the electric meter K1, and recording the steady state measurement time T;
s9, calculating final steady state measurement time T, calculating electric energy W consumed in the steady state measurement process of the main heating section, and calculating power consumed by the electric heating element according to N=W/T; then according to q=n =and/L, calculating the heat flux density of the heat insulation pipe.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (10)
1. A method for determining heat flux density of a steam pipe network, characterized by: the method comprises the following steps:
s1, setting an experimental device: an electric heating element is arranged in the working tube; two heat preservation partitions are arranged in the working tube at intervals, and two ends of the working tube are closed to form a main heating section positioned in the middle of the working tube and heating compensation sections positioned at two ends of the working tube; the temperature measuring points are respectively arranged on the outer side walls of the main heating section and the two heating compensation sections and the inner cavities of the main heating section and the two heating compensation sections, and the temperature sensing probes of the electronic thermometer are fixed at the corresponding temperature measuring points; then coaxially coating a plurality of heat preservation layers outside the working pipe, and sleeving an outer protection pipe outside the outermost heat preservation layer;
s2, measuring the length L of the main heating section;
s3, electrically connecting an electric heating element of the main heating section with an electric meter K1;
s4, starting the experimental device;
s5, adjusting the temperature of all the electric heating elements to be the steam parameter temperature value to be simulated;
s6, measuring and recording the electric energy consumed by the electric heating element of the main heating section by using an electric meter K1;
s7, heating for a certain time until the temperature value of the corresponding temperature measuring point of the main heating section and the temperature value of the corresponding temperature measuring point of the two heating compensation sections are close to the designed temperature value, and the values are stable; meanwhile, the value of the electricity meter K1 increased every hour is equal;
s8, recording the numerical values displayed on the digital display screen of each electronic thermometer every other hour, recording the consumed electric energy displayed by the electric meter K1, and recording the steady state measurement time T;
s9, calculating final steady state measurement time T, calculating electric energy W consumed in the steady state measurement process of the main heating section, and calculating power consumed by the electric heating element according to N=W/T; then according to q=n =and/L, calculating the heat flux density of the heat insulation pipe.
2. A method for determining heat flux density of a steam pipe network according to claim 1, wherein: in S1, the electric heating element is an electric heating sheet, and the electric heating sheet is tightly attached to the inner wall of the working tube.
3. A method for determining heat flux density of a steam pipe network according to claim 1, wherein: in S1, two heat preservation end seals are respectively fixed at two ends of the working pipe, and the two heat preservation end seals respectively seal corresponding pipe orifices of the working pipe.
4. A method for determining heat flux density of a steam pipe network according to claim 3, wherein: the thickness of any heat-preserving end seal is larger than or equal to the total thickness of a plurality of heat-preserving layers.
5. A method for determining heat flux density of a steam pipe network according to claim 1, wherein: s1 specifically comprises:
s1.1, presetting a temperature measuring point A on the outer surface of any heating compensation section, uniformly and alternately arranging a plurality of temperature measuring points A on the outer surface of the corresponding heating compensation section, and respectively fixing temperature sensing probes of a plurality of electronic thermometers at the corresponding temperature measuring points A;
s1.2, a plurality of temperature measuring points B are preset in the cavity in the heating compensation section, and the temperature measuring points B are uniformly distributed in the cavity in the heating compensation section, so that temperature sensing probes of a plurality of electronic thermometers are respectively fixed at the corresponding temperature measuring points B;
s1.3, presetting a temperature measuring point C on the outer surface of the main heating section, uniformly arranging a plurality of temperature measuring points C on the outer surface of the main heating section, and respectively fixing temperature sensing probes of a plurality of electronic thermometers at the corresponding temperature measuring points C;
s1.4, a plurality of temperature measuring points D are uniformly distributed in the cavity in the main heating section, and the temperature sensing probes of the electronic thermometers are respectively fixed at the corresponding temperature measuring points D.
6. A method for determining heat flux density of a steam pipe network as defined in claim 5, wherein: in S1.1, any temperature measuring point A is not less than 100mm away from the working pipe orifice.
7. A method for determining heat flux density of a steam pipe network according to claim 1, wherein: in S1.3, the distance between any temperature measuring point C and the insulation partition is not less than 100mm.
8. A method for determining heat flux density of a steam pipe network according to claim 1, wherein: in S1, temperature measuring points E1-Ei are sequentially distributed between adjacent heat preservation layers, a temperature measuring point F is arranged on the outer side surface of the heat preservation layer of the outermost layer, the temperature measuring points E1-Ei and the temperature measuring point F are all arranged in a main heating section, then temperature sensing probes of a plurality of electronic thermometers are respectively fixed at the temperature measuring points E1-Ei and the temperature measuring point F, and a plurality of temperature measuring points E1-Ei are uniformly distributed on the circumference between the corresponding heat preservation layers.
9. A method for determining heat flux density of a steam pipe network according to claim 8, wherein: the temperature measuring points E1-Ei are uniformly distributed on the circumference between the corresponding heat insulation layers, and the temperature measuring points F are uniformly distributed on the circumference of the outer surface of the outermost heat insulation layer.
10. A method for determining heat flux density of a steam pipe network according to claim 1, wherein: in S7, heating for a certain time until the values of the temperature measurement point a and the temperature measurement point C are close to the preset temperature value, and the values are stable, and after the values of the temperature measurement point B and the temperature measurement point D are close to the preset temperature value, the device continues to operate, and then the measured values are recorded.
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| CN202110971020.3A CN113739959B (en) | 2021-08-23 | 2021-08-23 | Method for measuring heat flux density of steam pipe network |
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| CN202110971020.3A CN113739959B (en) | 2021-08-23 | 2021-08-23 | Method for measuring heat flux density of steam pipe network |
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| WO2007063110A1 (en) * | 2005-12-01 | 2007-06-07 | Endress+Hauser Flowtec Ag | Thermal device for determining and/or monitoring the mass flow rate of a fluid medium |
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2021
- 2021-08-23 CN CN202110971020.3A patent/CN113739959B/en active Active
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|---|---|---|---|---|
| WO2007063110A1 (en) * | 2005-12-01 | 2007-06-07 | Endress+Hauser Flowtec Ag | Thermal device for determining and/or monitoring the mass flow rate of a fluid medium |
| CN102539470A (en) * | 2012-01-30 | 2012-07-04 | 北京建筑工程学院 | Integrated detection system for thermal performance of lower-medium vacuum compound insulation pipeline and application of integrated detection system |
| CN110220939A (en) * | 2019-07-01 | 2019-09-10 | 清华大学 | A kind of water wall surface thermal flow density measuring device and measurement method |
| CN113139353A (en) * | 2021-05-11 | 2021-07-20 | 东北大学 | Dynamic calculation and online monitoring early warning analysis method for steam pipe network |
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| Title |
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| 喷管喉部热流密度测量实验研究;肖虎亮;胡春波;张胜敏;邓哲;秦飞;;固体火箭技术;20130215(第01期);全文 * |
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