CN105590538A - Gas heat exchanger and air flow measurement experimental device - Google Patents
Gas heat exchanger and air flow measurement experimental device Download PDFInfo
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- CN105590538A CN105590538A CN201610108772.6A CN201610108772A CN105590538A CN 105590538 A CN105590538 A CN 105590538A CN 201610108772 A CN201610108772 A CN 201610108772A CN 105590538 A CN105590538 A CN 105590538A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/42—Orifices or nozzles
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/44—Venturi tubes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/46—Pitot tubes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
- G09B23/12—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics of liquids or gases
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- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
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- Educational Technology (AREA)
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- Algebra (AREA)
- Pure & Applied Mathematics (AREA)
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Abstract
The invention discloses a gas heat exchanger and an air flow condition measurement experimental device. The gas heat exchanger comprises a hot gas channel, a cold air channel, and a heat pipe. The heat pipe comprises an evaporation end and a condensation end. The evaporation end is disposed on the hot gas channel, and the condensation end is disposed on the cold air channel. The inlet of the hot gas channel is provided with a temperature sensor and a flow sensor, which are used for measuring the gas temperature and the gas flow of the gas entering the hot gas channel. The inlet of the cold air channel is provided with a valve, which is used for controlling the cold air flow entering the cold air channel. The heat exchanger comprises a controller, which is in a data connection with a temperature sensor, a flow sensor, and a control valve, and is used to control the opening degree of the valve automatically according to the measured gas temperature and the measured gas flow. The gas flow entering the heat exchanger can be controlled automatically by measuring the temperature and the flow velocity of the hot gas, and therefore the automatic control of the cold fluid output temperature can be realized, and in addition, the gas flow condition measuring experimental device can be used for the teaching, and the difference between different measuring ways can be compared obviously, and the teaching can be facilitated.
Description
Technical field
The present invention relates to the gas flow measurement experimental provision using in a kind of gas heat exchanger and heat exchanger, belong to heat exchange field and hydrodynamics field.
Background technology
Gas heat exchanger, in carrying out heat exchange, causes heat transfer effect to occur significantly different, and causes heat transfer effect not reach ideal situation because of the measure error of thermal fluid flow because the inlet temperature of hot fluid is inhomogeneous.
In addition the measurement of gas flow rate and flow is a hydromechanical fundamental measurement. In the every field of experimental study and engineering application, the flow-speed measurement problem miscellaneous all proposing, for example, determine inlet manifold air mass flow, the air speed of measuring aircraft etc. that ECU controls. Conventionally the flow meter applications principle and the method that when the flow of our convection cell is measured, use are different, and wherein differential pressure flowmeter is widely used, and conventional kind has Venturi meter, orifice flowmeter, Pitot static tube etc. Different types of flowmeter using method and advantage are had nothing in common with each other, and even, in the time of different air-flow velocity, different metering systems can present different precision, for example, on the blowing devices such as boiler, all can have flow measurement device. By the comparison of this measurement device, can instruction be proposed for it, different air quantity are selected different flow measurement devices, obtain measurement result more accurately. Therefore in teaching process, need to invent a kind of intuitively experimental provision of the more various measuring method similarities and differences, facilitate Students ' Learning.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of gas heat exchanger that can reach ideal temperature, also provide a kind of experimental provision that can the various flowmeters of composite measurement, to use in gas heat exchanger simultaneously.
Technical scheme of the present invention is as follows: a kind of gas heat exchanger, described gas heat exchanger comprises hot gas runner, cold air runner and heat pipe, described heat pipe comprises evaporation ends and condensation end, described evaporation ends is positioned at hot gas runner, condensation end is positioned at cold air runner, it is characterized in that, described hot gas runner entrance set temperature sensor and flow sensor, for measuring the gas temperature and the gas flow that enter hot gas runner, described cold air runner entrance arranges valve, for controlling the cold air flow that enters cold air runner, described heat exchanger also comprises controller, described controller and temperature sensor, flow sensor, control valve data connect, described controller is according to gas temperature and the gas flow measured, the aperture of autocontrol valve.
Preferably, Q=(gas temperature-fiducial temperature) * gas flow, if the Q measuring increases, automatically increase the aperture of valve, if the Q measuring reduces, automatically reduce the aperture of valve.
Preferably, described fiducial temperature is 20-30 DEG C.
A kind of gas flow situation experiments of measuring device, comprises air-flow generating apparatus, Pitot static tube system, venturi flow meter systems, orifice flowmeter system and flow control system and runner; Air-flow generating apparatus is created in air-flow mobile in runner, the size of described flow control system control air-flow, described Pitot static tube system, venturi flow meter systems, orifice flowmeter system are arranged on runner, for measuring the flow of runner air-flow, described flow control system, Pitot static tube system, venturi flow meter systems, orifice flowmeter system are carried out data with data acquisition controller respectively and are connected, and described data acquisition controller is connected with data display equipment.
Preferably, along the direction of air-flow, in runner, set gradually air-flow generating apparatus, Pitot static tube system, venturi flow meter systems, orifice flowmeter system and flow control system.
Preferably, air-flow generating apparatus comprises cfentrifugal blower, tapered snorkel and gas channel, and gas channel connects tapered snorkel and connects, and described air blast is connected with airflow path; Wherein the runner at Pitot static tube system place is square-section, and the runner at venturi flow meter systems, orifice flowmeter system place is circle.
Preferably, described Pitot static tube system comprises Pitot static tube and Pitot tube mobile device, and mobile device can make Pitot tube move freely in surveyed cross section.
Preferably, in described venturi flow meter systems, the front end airway length of Venturi meter installation site is greater than five times of flow diameters, and rear end length is greater than three times of flow diameters.
Preferably, described flow control system is baffle plate and the mobile device that is arranged on gas channel end, controls air-flow size by the distance of controlling baffle plate and channel outlet.
Preferably, in the square passageway of Pitot static tube system, the cross section length of side is L, the radius of circular channel is R, the minimum range S1 between Pitot static tube system and venturi flow meter systems>=a* ((R/2) 2+L2) (1/2), wherein a is parameter, 22.54<a<32.18;
Distance S2 between venturi flow meter systems, orifice flowmeter system>=b*R, wherein b is parameter, 10<b<23.
Compared with prior art, the present invention has advantages of as follows:
1) automatically control by temperature and the flow velocity of hot gas of measuring the gas flow that enters heat exchanger, thereby realize the automatic control of cold fluid output temperature.
2) by multiple measurement flow velocity devices are set on an experimental bench, various flow rate meter is worked simultaneously simultaneously, and by display unit display measurement data, facilitates the contrast of data, can select fast the little measurement mechanism of error under different in flow rate.
3) realized and on an experimental facilities, completed the object that several different methods air-flow velocity is measured, can compare intuitively the similarities and differences of different flow meter, simple to operate, convenient teaching.
4) Pitot tube can move up and down on the guide rail of mobile device, has increased the flow of the diverse location of measuring, and improves the degree of accuracy of measuring, the change in flow of being simultaneously convenient to observe diverse location, convenient teaching.
5) by a large amount of experiments, determine the best distance between each measurement mechanism, avoid the error that the gas disturbance between each measurement mechanism causes to increase, thereby increased greatly the accuracy of measuring.
Brief description of the drawings
Fig. 1 is heat exchanger structure schematic diagram of the present invention;
Fig. 2 is experimental provision schematic diagram of the present invention
Fig. 3 is experimental provision entirety top view of the present invention;
Fig. 4 is the schematic diagram of Pitot static tube system of the present invention;
Fig. 5 is the side view of Pitot tube mobile device of the present invention;
Fig. 6 is the schematic diagram of venturi flow meter systems of the present invention;
Fig. 7 is the schematic diagram of orifice flowmeter system of the present invention;
Fig. 8 is the schematic diagram of tilting-type pressure gauge system of the present invention and digital readout system;
Fig. 9 is the schematic diagram of control system of the present invention;
Figure 10 is the schematic diagram of air-flow generating apparatus of the present invention.
Reference numeral is as follows:
1 tapered snorkel, 2 centrifugal fans, 3 Pitot static tube systems, 4 venturi flow meter systems, 5 orifice flowmeters, 6 tilting-type pressure gauges, 7 flow control systems, 8 Pitot tubes, 9 Pitot tube mobile devices, 10 air flues, 11 high pressure pressure-measuring pipes, 12 low pressure pressure-measuring pipes, 13 Venturi meters, 14 high pressure pressure-measuring pipes, 15 low pressure pressure-measuring pipes, 16 tilting-type pressure gauges, 17 thermometers, 18 baffle plates, 19 control handles, 20 digital display equipment, 21 data acquisition controllers, 22 condensation end of heat pipes, 23 heat pipe evaporation ends, 24 cold air runners, 25 hot gas runners, 26 projections, 27 grooves.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Fig. 1 has shown a kind of gas heat exchanger, as shown in the figure, described gas heat exchanger comprises hot gas runner 25, cold air runner 24 and heat pipe, described heat pipe comprises evaporation ends 23 and condensation end 22, described evaporation ends 23 is arranged in hot gas runner 25, condensation end 22 is arranged in cold air runner 24, described hot gas runner 25 entrance set temperature sensor and flow sensors, for measuring the gas temperature and the gas flow that enter hot gas runner, described cold air runner 24 entrances arrange valve, for controlling the cold air flow that enters cold air runner, described heat exchanger also comprises controller, described controller and temperature sensor, flow sensor, control valve data connect, described controller is according to gas temperature and the gas flow measured, the aperture of autocontrol valve.
Described controller is to carry out valve control according to the combination of gas temperature and gas flow, concrete control mode is as follows: control parameter Q=(gas temperature-fiducial temperature) * gas flow, if the control parameter Q measuring increases, automatically increase the aperture of valve, if the control parameter Q measuring reduces, automatically reduce the aperture of valve.
By above-mentioned Based Intelligent Control, can realize the flow that carrys out the cold air of control and participate in heat exchange along with the gas flow temperature of hot fluid and changes in flow rate, be consistent thereby realize cold air exit temp, avoid cold-air vent excess Temperature or too low, thereby affect result of use.
As preferably, described hot gas is boiler exhaust gas. In boiler flue, use, can also avoid cold end corrosion. By controlling the flow of cold air, avoid exhaust gas temperature too high or too low, thereby cause heat waste or cause cold end corrosion.
As preferably, described hot gas is hot-air.
As preferably, described fiducial temperature is 20-30 DEG C.
In the operation practice of heat exchanger, find, other not all measurement mechanisms are all adapted at measuring flow in heat exchanger, there is the use in different environment of some measurement mechanisms can produce very large error, especially the error difference causing because of gas velocity is larger, cause operational effect very poor, therefore the operational effect in order to ensure must be selected suitable survey tool in different heat exchange environment. Therefore be necessary to develop a kind of new experimental provision, to test the survey tool error under different environment, so that the little survey tool of Select Error.
Fig. 2 has shown a kind of rough schematic of new gas flow measurement experimental provision. Gas flow situation experiments of measuring device as shown in Figure 2, comprises air-flow generating apparatus, Pitot static tube system 3, venturi flow meter systems 4, orifice flowmeter system 5, flow control system 7 and runner; Air-flow generating apparatus is created in air-flow mobile in runner, described flow control system 7 is controlled the size of air-flow, described Pitot static tube system 3, venturi flow meter systems 4, orifice flowmeter system 5 are arranged on runner, for measuring the flow of runner air-flow, described flow control system 7, Pitot static tube system 3, venturi flow meter systems 4, orifice flowmeter system 5 are carried out data with data acquisition controller 21 respectively and are connected, and described data acquisition controller 21 is connected 20 with data display equipment.
By above-mentioned flow-speed measurement experimental provision, the air-flow velocity that can complete multiple device on an experimental facilities is measured, and can show each measurement data by display unit, be convenient to the relatively quality to middle survey tool, also convenient teaching, makes student can observe intuitively various instrument and the speed-measuring method of testing the speed simultaneously.
As preferably, as shown in Figure 9, described flow control system 7 comprises the baffle plate 18 and the mobile device control handle 19 that are arranged on gas channel end, and baffle plate is connected with gas channel outlet by screw rod, and the distance that changes baffle plate and channel outlet by rotary control knob is controlled air-flow size. In addition, also can pass through other rational method control air flow rates, for example, use frequency conversion air pump or control air flow rate etc. in import department.
As preferably, described experimental provision comprises high-precision gas flowmeter, as preferably, described high-precision gas flowmeter is arranged between the baffle plate 18 and orifice flowmeter system of gas channel 10, described high-precision gas flowmeter is connected with data acquisition controller 21 data, described flow control system 7 can be controlled gas flow, and shows on display device 20 by the gas flow rate of high-precision gas flowmeter survey. The data of described high-precision gas flowmeter survey are correction data, the data that Pitot static tube system 3, venturi flow meter systems 4, orifice flowmeter system 5 are measured contrast with the data of high-precision gas flowmeter survey respectively, determine mistake extent, to determine suitable flowmeter, offer different suitable environments and use.
Because data as a comparison, therefore high-precision gas flowmeter precision prescribed is very high, and error is very little, and the error of measurement is in 0.5%, and as preferably, error is in 0.2%.
As preferably, high-precision gas flowmeter can be arranged on other positions of airflow path 10, for example, be arranged between air-flow generating apparatus and Pitot static tube system.
As preferably, as shown in Figure 3, for ensureing to be independent of each other between each measurement mechanism, runner is segmentation structure, be divided into four sections, Pitot static tube system, venturi flow meter systems, orifice flowmeter system are arranged between air flue successively, and each several part connects by flange. By runner subsection setup, can ensure that each runner air-flow out can not produce and disturb measurement mechanism below.
As shown in Figure 3, described Pitot static tube system comprises Pitot tube and tilting-type pressure gauge 6, Pitot tube connects tilting-type pressure gauge 6, and described tilting-type pressure gauge 6 carries out data with data acquisition controller 21 and is connected, and obtains the flow velocity of gas by data acquisition controller 21.
The Pitot static tube system of device has been shown in Fig. 3-4, and Pitot tube mobile device 9 is arranged on air flue wall, and Pitot tube 8 be auxiliary lower can the moving freely of mobile device 9 in measurement cross section, realizes multimetering and get the function of average.
As shown in figure, 5, described mobile device 9 comprises slide block, described Pitot tube is arranged in slide block, described slide block comprises projection 26, described projection 26 is arranged in the groove 27 of air flue tube wall, projection 26 can, in the interior movement of groove 27, be realized moving freely of Pitot tube 8 by the movement of projection 26.
As preferably, after the moving freely of Pitot tube 8, take seal approach to seal, avoid gas leakage.
As shown in Figure 5, impact air-flow in air flue being produced for reducing device, fills described mobile device and adopts and on air flue wall, open sliding tray and realize transverse shifting, wherein on contact-making surface, is coated with lubricating oil, increases bubble-tight object convenient reaching in mobile. In addition, Pitot tube can move up and down on the guide rail of mobile device, to realize the function vertically moving.
Fig. 6 has shown the venturi system of device, Venturi meter 13 is directly installed between two sections of gas channels, it should be noted when Venturi meter is installed, as preferably herein, front end flow development length should be greater than 5 times of diameters, and rear end flow development length should be greater than 2 times of diameters. In the time measuring, 11 measured values of high-tension measurement pipe of Venturi meter are larger, select the tilting-type pressure gauge of relatively large journey, and low pressure pressure-measuring pipe 12 is connected with the pressure gauge compared with small-range.
Fig. 7 has shown the orifice flowmeter system of device, and orifice flowmeter 10 is directly installed on gas channel, similar with Venturi meter, and high-tension measurement pipe 14 is connected with the tilting-type pressure gauge of relatively large journey, and low pressure pressure-measuring pipe 15 is connected with the pressure gauge compared with small-range.
As Fig. 8 has shown tilting-type pressure gauge system and the digital readout system of device, shown in tilting-type pressure gauge 16 be divided into two of the different sizes of range, can conveniently read the dynamic and static pressure differential pressure of the measured air-flow of the measurement mechanisms such as Pitot tube. Can be by increasing the manometric inclination angle of tilting-type when measurement, to obtain higher sensitivity, but the while is because pressure gauge range increases and reduces with inclination angle, therefore need operator to regulate and use according to surveyed air flow rate. Thermometer 17 can be measured environment temperature at that time in the time that experiment needs.
As preferably, digital display equipment 20 comprises digital polling device and pressure difference transmitter, can change pressure reduction measured measurement mechanism into the signal of telecommunication by pressure difference transmitter, delivers to logging and realizes the numeral of measurement result and show.
Tilting-type pressure gauge 16 carries out data with data acquisition controller 21 and is connected, and obtains the flow velocity of gas by data acquisition controller 21.
Certainly, in order to represent that conveniently Fig. 3 has just shown a tilting-type pressure gauge. But as preferred, Pitot static tube system 3, venturi flow meter systems 4, orifice flowmeter system 5 are connected from different tilting-type pressure gauges respectively, to can measure multi-group data simultaneously.
Figure 10 has shown a kind of air-flow generating apparatus of air current measurer, and centrifugal fan 2 is connected with tapered snorkel 1, by one section 3 of air flue to whole device air feed. Gas channel connects tapered snorkel 1, and described blower fan 2 is connected with airflow path.
As preferably, wherein the runner at Pitot static tube system place is square-section, and the runner at venturi flow meter systems, orifice flowmeter system place is circle.
In practice, find, for Pitot static tube system 3, venturi flow meter systems 4, orifice flowmeter system 5, must be greater than each other certain distance, otherwise can cause fully not flowing from previous survey tool gas out, thereby cause measurement result misalignment, therefore must between each survey tool, set a distance, make the gas in runner fully mobile, thereby ensure the accuracy of measuring.
Experiment discovery, the distance between Pitot static tube system 3, venturi flow meter systems 4, orifice flowmeter system 5, flow control system 7 is relevant to runner caliber. Under normal circumstances, distance between each survey tool is more far longer, but considers Cost Problems, space problem and consider that distance is longer, causes Leakage Gas and the error problem that produces, therefore the present invention, by a large amount of experiments, has obtained best range formula.
The runner at Pitot static tube system place is square sectional, the runner at venturi flow meter systems, orifice flowmeter system place is circle, in such cases, in the square passageway of Pitot static tube system, the cross section length of side is L, the radius of circular channel is R, the minimum range S1 between Pitot static tube system and venturi flow meter systems >=a* ((R/2)2+L2)(1/2), wherein a is parameter, 22.54 < a < 32.18.
As preferably, 35.34* ((R/2)2+L2)(1/2)<=S1<=46.32*((R/2)2+L2)(1/2)。
As preferably, described a is along with (R/2)2+L2Increase and increase. As preferably, described a is along with (R/2)2+L2Increase and the amplitude that increases is increasing.
Found through experiments, the amplitude of a is along with (R/2)2+L2Constantly change, can cause result more accurate, greatly improved the accuracy of measurement data.
As preferably, 25.52 < a < 28.24.
Distance S2 between venturi flow meter systems, orifice flowmeter system>=b*R, wherein b is parameter, 10<b<23. As preferably, described b increases along with the increase of R. As preferably, the amplitude that described b increases along with the increase of R is increasing.
Found through experiments, the amplitude of b, along with R constantly changes, can cause result more accurate, has greatly improved the accuracy of measurement data.
As preferably, 15.3 <b < 18.2.
Distance S3 between orifice flowmeter system and flow control system 7>=c*R, wherein c is parameter, 4<c<13. As preferably, described c increases along with the increase of R. As preferably, the amplitude that described c increases along with the increase of R is increasing.
Found through experiments, the amplitude of c, along with R constantly changes, can cause result more accurate, has greatly improved the accuracy of measurement data.
As preferably, 7.2 < c < 9.2.
Distance between adjacent Pitot static tube system 3, venturi flow meter systems 4, orifice flowmeter system 5, flow control system 7 is with the distance between the last position of this system on runner and the position of the beginning of next system, as preferably, Pitot static tube system 3, venturi flow meter systems 4, orifice flowmeter system 5, flow control system 7 are fixed on runner by flange, and the distance of described adjacent system is with the distance between adjacent system flange at tail end and next system top flange.
Although the present invention discloses as above with preferred embodiment, the present invention is not defined in this. Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.
Claims (10)
1. a gas heat exchanger, described gas heat exchanger comprises hot gas runner, cold air runner and heat pipe, described heat pipe comprises evaporation ends and condensation end, described evaporation ends is positioned at hot gas runner, condensation end is positioned at cold air runner, it is characterized in that, described hot gas runner entrance set temperature sensor and flow sensor, for measuring the gas temperature and the gas flow that enter hot gas runner, described cold air runner entrance arranges valve, for controlling the cold air flow that enters cold air runner, described heat exchanger also comprises controller, described controller and temperature sensor, flow sensor, control valve data connect, described controller is according to gas temperature and the gas flow measured, the aperture of autocontrol valve.
2. gas heat exchanger as claimed in claim 1, is characterized in that, Q=(gas temperature-fiducial temperature) * gas flow, if the Q measuring increases, automatically increase the aperture of valve, if the Q measuring reduces, automatically reduce the aperture of valve.
3. gas heat exchanger as claimed in claim 1, is characterized in that, described fiducial temperature is 20-30 DEG C.
4. a gas flow situation experiments of measuring device, comprises air-flow generating apparatus, Pitot static tube system, venturi flow meter systems, orifice flowmeter system and flow control system and runner; Air-flow generating apparatus is created in air-flow mobile in runner, the size of described flow control system control air-flow, described Pitot static tube system, venturi flow meter systems, orifice flowmeter system are arranged on runner, for measuring the flow of runner air-flow, described flow control system, Pitot static tube system, venturi flow meter systems, orifice flowmeter system are carried out data with data acquisition controller respectively and are connected, and described data acquisition controller is connected with data display equipment.
5. gas flow situation experiments of measuring device as claimed in claim 4, it is characterized in that, along the direction of air-flow, in runner, set gradually air-flow generating apparatus, Pitot static tube system, venturi flow meter systems, orifice flowmeter system and flow control system.
6. described gas flow situation experiments of measuring device as claimed in claim 4, it is characterized in that, air-flow generating apparatus comprises centrifugal fan, tapered snorkel and gas channel, and gas channel connects tapered snorkel and connects, and described blower fan is connected with airflow path; Wherein the runner at Pitot static tube system place is square-section, and the runner at venturi flow meter systems, orifice flowmeter system place is circle.
7. gas flow situation experiments of measuring device as claimed in claim 4, described Pitot static tube system comprises Pitot tube and Pitot tube mobile device, mobile device can make Pitot tube move freely in surveyed cross section.
8. gas flow situation experiments of measuring device as claimed in claim 4, also comprise high-precision gas flowmeter, described high-precision gas flowmeter is connected with data acquisition controller data, described flow control system can be controlled gas flow, and shows on display device by the gas flow rate of high-precision gas flowmeter survey; The data of described high-precision gas flowmeter survey are correction data, and the data of Pitot static tube system, venturi flow meter systems, orifice flowmeter systematic survey contrast with the data of high-precision gas flowmeter survey respectively, determine mistake extent.
9. gas flow situation experiments of measuring device as claimed in claim 4, described flow control system is baffle plate and the mobile device that is arranged on gas channel end, controls air-flow size by the distance of controlling baffle plate and channel outlet.
10. gas flow situation experiments of measuring device as claimed in claim 6, it is characterized in that, in the square passageway of Pitot static tube system, the cross section length of side is L, the radius of circular channel is R, the minimum range S1 between Pitot static tube system and venturi flow meter systems >=a* ((R/2)2+L2)(1/2), wherein a is parameter, 22.54 < a < 32.18;
Distance S2 between venturi flow meter systems, orifice flowmeter system>=b*R, wherein b is parameter, 10<b<23.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710499096.4A CN107270982B (en) | 2016-02-27 | 2016-02-27 | A kind of gas flow measurement experimental provision that measuring device is mobile |
| CN201710499007.6A CN107121178B (en) | 2016-02-27 | 2016-02-27 | A kind of gas flow measurement experimental provision of flow control |
| CN201610108772.6A CN105590538B (en) | 2016-02-27 | 2016-02-27 | A kind of gas flow measurement experimental provision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610108772.6A CN105590538B (en) | 2016-02-27 | 2016-02-27 | A kind of gas flow measurement experimental provision |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710499007.6A Division CN107121178B (en) | 2016-02-27 | 2016-02-27 | A kind of gas flow measurement experimental provision of flow control |
| CN201710499096.4A Division CN107270982B (en) | 2016-02-27 | 2016-02-27 | A kind of gas flow measurement experimental provision that measuring device is mobile |
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| CN201710499096.4A Expired - Fee Related CN107270982B (en) | 2016-02-27 | 2016-02-27 | A kind of gas flow measurement experimental provision that measuring device is mobile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107255616A (en) * | 2017-06-08 | 2017-10-17 | 国网浙江省电力公司电力科学研究院 | A kind of devices and methods therefor for simulating water screen tube operation conditions in boiler |
| CN109882878A (en) * | 2018-04-14 | 2019-06-14 | 青岛科技大学 | A kind of intelligent flue gas UTILIZATION OF VESIDUAL HEAT IN and its flue gas pollutant processing system |
| CN112203532A (en) * | 2018-05-31 | 2021-01-08 | 日本烟草产业株式会社 | Fragrance generating device |
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| CN108682239A (en) * | 2018-08-16 | 2018-10-19 | 重庆市渝北区发明创新服务协会 | A kind of high school physics active experiment platform convenient for adjusting |
| CN110470859B (en) * | 2019-09-24 | 2021-04-20 | 西北工业大学 | Method for measuring direction and speed of airflow in air system |
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| CN113585982B (en) * | 2021-08-27 | 2022-06-17 | 重庆力劲机械有限公司 | Oil pipe with pressure flow and temperature detection functions |
| CN117605444B (en) * | 2024-01-22 | 2024-04-12 | 西安思坦仪器股份有限公司 | High-temperature intelligent water distributor |
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| CN202584505U (en) * | 2012-03-31 | 2012-12-05 | 西安理工大学 | Test instrument for venturi and orifice plate flowmeters |
| CN204330048U (en) * | 2013-12-24 | 2015-05-13 | 迪特里奇标准公司 | For the equipment of the flow of measuring process fluid |
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| CN109882878A (en) * | 2018-04-14 | 2019-06-14 | 青岛科技大学 | A kind of intelligent flue gas UTILIZATION OF VESIDUAL HEAT IN and its flue gas pollutant processing system |
| CN112203532A (en) * | 2018-05-31 | 2021-01-08 | 日本烟草产业株式会社 | Fragrance generating device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105590538B (en) | 2017-07-14 |
| CN107270982A (en) | 2017-10-20 |
| CN107270982B (en) | 2019-07-26 |
| CN107121178A (en) | 2017-09-01 |
| CN107121178B (en) | 2019-03-29 |
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