CN111458370A - Performance testing device and system for total heat exchange membrane - Google Patents
Performance testing device and system for total heat exchange membrane Download PDFInfo
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- CN111458370A CN111458370A CN202010472326.XA CN202010472326A CN111458370A CN 111458370 A CN111458370 A CN 111458370A CN 202010472326 A CN202010472326 A CN 202010472326A CN 111458370 A CN111458370 A CN 111458370A
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- 239000012528 membrane Substances 0.000 title claims abstract description 173
- 238000012360 testing method Methods 0.000 title claims abstract description 167
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- 238000011156 evaluation Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000003153 chemical reaction reagent Substances 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 9
- 239000002274 desiccant Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000011056 performance test Methods 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 4
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- 238000005192 partition Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 19
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- 238000000034 method Methods 0.000 description 28
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 238000005868 electrolysis reaction Methods 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 238000004590 computer program Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
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- 229910052757 nitrogen Inorganic materials 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- G—PHYSICS
- G01—MEASURING; TESTING
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- G01N13/04—Investigating osmotic effects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/086—Investigating permeability, pore-volume, or surface area of porous materials of films, membranes or pellicules
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Abstract
The invention provides a performance testing device and a system of a total heat exchange membrane, wherein the performance testing device of the total heat exchange membrane comprises: a cold box and a hot box; the total heat exchange membrane clamp is arranged between the cold box and the hot box, is fixedly connected with the cold box and the hot box, and is clamped and connected with the total heat exchange membrane test piece; the test working condition adjusting unit is fixedly connected with the cold box and the hot box and is used for adjusting the temperature and the humidity in the cold box and the hot box; the temperature self-recording instrument is fixedly connected with the cold box and the hot box and is used for recording the temperature in the cold box and the temperature in the hot box; and the first humidity self-recording instrument is fixedly connected with the cold box and the hot box and is used for recording the humidity in the cold box and the hot box. The invention takes the coupling effect between the heat transfer and the moisture transfer of the material into consideration, and fills up the technical blank in the aspect of the coupling test of the heat and moisture performance of the total heat exchange membrane.
Description
Technical Field
The invention relates to the technical field of performance test of total heat exchange membranes, relates to a performance test device, and particularly relates to a performance test device and a system of a total heat exchange membrane.
Background
With the growing severity of energy and health issues, the use of total heat exchangers has become an effective way to achieve both of these issues. The static type total heat exchanger belongs to one type of total heat exchanger, has no transmission part and is mainly formed by packaging a total heat exchange membrane, a partition plate, a fin and the like. Directly depends on the temperature difference and humidity difference between the fresh air and the exhausted air, and conducts heat and humidity transmission through a total heat exchange membrane.
The current research on the static total heat exchanger is divided into 3 main aspects: the method comprises the following steps of research and development of exchange materials, optimization of core structure appearance and analysis of operation condition influence. Research shows that the heat exchange efficiency of the total heat exchanger is related to the thickness of the total heat exchange membrane, the water vapor transmission rate and the water content of the material. Therefore, for the static total heat exchanger, the heat and moisture exchange performance of the total heat exchange membrane is the key to realize heat and mass exchange.
At present, corresponding total heat exchanger specifications are established in China, the United states, Europe and Japan, and the emphasis points of the specifications are different. Due to climate difference of standard setting areas, the experimental working conditions for detecting the total heat exchanger in the corresponding specifications are different. In addition, the ANRI 1060-2013 does not consider the condensation and noise tests; EN308 does not place a detection requirement on the full thermal efficiency of the device; JISB8628 lacks testing for cabinet and internal air leakage; GB/T21087-2007 does not provide requirements for latent heat efficiency, but the method is more complete in the aspects of application range, device category, working condition setting and the like. However, the detection requirements proposed by each standard are all specific to the whole machine, and no test index and test method related to the heat and humidity performance of the total heat exchange membrane are provided.
The total heat exchanger performs sensible heat recovery and total heat recovery using a total heat exchange membrane as a medium, and thus requires a material having good heat transfer performance and high permeability to water vapor. Aiming at the two performances, corresponding evaluation indexes of the total heat exchanger material are established in Japan at present, but China does not release the performance evaluation standard of the heat and moisture exchange material.
Japanese regulations only relate to a method for testing moisture permeability, air permeability and flame retardance of materials, and do not relate to a method for testing heat transfer performance of materials. Because the heat transfer resistance in the heat transfer process of the full heat exchange membrane is mainly heat transfer convection resistance, the heat transfer performance of the material is judged according to the whole heat transfer process, namely the heat transfer coefficient, at the two sides of the full heat exchange membrane. The heat transfer coefficient test method in the laboratory is mainly a static heat box method which is generally divided into a calibration heat box method and a protection heat box method. The hot box method is generally used for measuring the heat transfer coefficient of building components or building envelopes, and the detection principle is that a to-be-measured piece is placed into a cold box and a hot box, and in a stable state, when the temperature of the cold box and the hot box is basically kept unchanged, the power input into the hot box and the air temperature of the cold box and the hot box are measured, so that the heat transfer coefficient of the to-be-measured piece is obtained. The basic principle of the hot box method is also applied to the test of the heat insulation performance of the greenhouse covering material. The application of the hot box method is mature in the aspect of measuring the heat transfer coefficients of building components and greenhouse covering materials, but the specifications of the total heat exchange membrane and the heat transfer characteristics of the total heat exchanger are different from those of the total heat exchange membrane and the total heat exchange membrane, and the existing specifications are suitable for measuring large-size samples in a laboratory. Therefore, the enthalpy exchanger enthalpy exchange membrane heat transfer coefficient cannot be tested using the conditions and equipment required in the specifications.
For the moisture permeability test of the material, the test method can be divided into a weighing method and a sensor method according to the principle. The weighing method tests the moisture permeability of the piece to be tested by utilizing the humidity difference existing on the two sides of the moisture permeable cup; the sensor method mainly comprises an electrolysis method and an infrared detection method, wherein the electrolysis method utilizes the relationship between the electrolysis current and the water vapor to calculate the water vapor content of a piece to be detected so as to obtain the moisture permeability of the piece to be detected; the basic principle of the infrared detection method is that nitrogen and dry nitrogen with constant humidity flow through two sides of a piece to be detected respectively, water vapor flows from a wet side to a dry side due to humidity difference, finally, carrier gas is transmitted to an infrared detector to generate an electric signal, and the water vapor transmission rate of the piece to be detected is calculated through the electric signal. The 3 testing methods have advantages and disadvantages respectively, the weighing method has long testing time, is easy to be interfered by external factors, and has low precision; but its principle and test equipment are simple. The electrolysis method and the sensor method have high cost, and the instrument needs to be calibrated regularly, but the test precision is high.
As can be seen from the above-mentioned relevant specifications, the above-mentioned relevant specifications for the total heat exchanger focus on the performance evaluation of the whole machine, and do not relate to the performance test of the total heat exchange membrane. The performance of the total heat exchange membrane can directly influence the efficiency of the static total heat exchanger. However, at present, aiming at the heat transfer and moisture permeability test specifications of materials such as thin sheets, paper and the like, two performance test methods can be found to be independent and separately carried out. However, in the actual operation of the static total heat exchanger, the total heat exchange membrane simultaneously carries out heat transfer and mass transfer processes, and the heat transfer process and the mass transfer process interact and influence each other. The evaluation of the total heat exchange membrane according to a single index usually ignores the coupling influence and also makes the comparison of the advantages and disadvantages of the total heat exchange membrane difficult.
Therefore, how to provide a device and a system for testing the performance of a total heat exchange membrane to solve the defects that the prior art does not provide a device for testing the performance of a total heat exchange membrane in combination with the coupling effect of heat transfer and mass transfer becomes a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a device and a system for testing performance of total heat exchange membrane, which are used to solve the problem of the prior art that a device for testing performance of total heat exchange membrane is not provided in combination with the coupling effect of heat transfer and mass transfer.
In order to achieve the above and other related objects, in one aspect, the present invention provides a device for testing performance of a total heat exchange membrane, in which a total heat exchange membrane test piece is placed in the device for testing performance of a total heat exchange membrane for performance testing, the device for testing performance of a total heat exchange membrane includes: a cold box and a hot box; the total heat exchange membrane clamp is arranged between the cold box and the hot box, is fixedly connected with the cold box and the hot box, and is clamped and connected with the total heat exchange membrane test piece; the test working condition adjusting unit is fixedly connected with the cold box and the hot box and is used for adjusting the temperature and the humidity in the cold box and the hot box; the temperature self-recording instrument is fixedly connected with the cold box and the hot box and is used for recording the temperature in the cold box and the temperature in the hot box; and the first humidity self-recording instrument is fixedly connected with the cold box and the hot box and is used for recording the humidity in the cold box and the hot box.
In an embodiment of the invention, test piece slots are arranged around the total heat exchange membrane fixture and used for inserting the total heat exchange membrane test piece; and the total heat exchange membrane fixture is provided with a total heat exchange membrane fixing clamp for fixing the total heat exchange membrane test piece.
In an embodiment of the invention, the upper sides of the box bodies of the cold box and the hot box are respectively provided with an air supply outlet and an air return inlet, and the air supply outlet and the air return inlet enable air to flow from the air supply outlet to the total heat exchange membrane test piece at a set speed and direction through the operation of the test working condition adjusting unit; the air supply opening is provided with a flow deflector which is used for controlling the direction of air flowing into the cold box and the hot box.
In an embodiment of the present invention, the test condition adjusting unit includes a temperature adjusting unit, a humidity adjusting unit, and a circulating air pipe unit; the temperature adjusting unit is fixedly connected with the cold box and is used for adjusting the temperature of the cold box before the formal test is started; the other temperature adjusting unit is fixedly connected with the hot box and is used for adjusting the temperature of the hot box before the formal test is started; the humidity adjusting unit is fixedly connected with the cold box and used for adjusting the humidity of the cold box before the formal test is started; the other humidity adjusting unit is fixedly connected with the hot box and is used for adjusting the humidity of the hot box before the formal test is started; the circulating air pipe unit is fixedly connected with the cold box and is used for enabling air in the cold box to flow to the total heat exchange membrane test piece from the air supply outlet at a set speed and direction; and the other circulating air pipe unit is fixedly connected with the hot box and is used for enabling the air in the hot box to flow to the total heat exchange membrane test piece from the air supply outlet at a set speed and direction.
In an embodiment of the present invention, the temperature adjustment unit includes: a heater device; the heater device is fixedly connected with the cold box and the hot box and used for adjusting the air temperature in the cold box and the hot box to reach the preset temperature of the cold box and the hot box before the test formally starts.
In an embodiment of the present invention, the humidity adjustment unit includes: the device comprises a gas delivery pipe, a gas inlet pipe, a gas outlet pipe, a humidity adjusting air valve, a second humidity self-recording instrument and a kit; the gas transmission pipe comprises a humidity adjusting axial flow fan; the cold box and the hot box are provided with gas pipe interfaces on the side surfaces, one end of each gas pipe is fixedly connected with the gas pipe interface, the other end of each gas pipe is movably connected with the kit, and the humidity of the air in the cold box and the humidity of the air in the hot box are adjusted before the test is started; the air inlet pipe and the exhaust pipe are fixedly connected to branch pipes of the air conveying pipe, the air inlet pipe and the exhaust pipe are respectively provided with a humidity adjusting air valve and a second humidity self-recording instrument, the second humidity self-recording instrument is used for monitoring the air humidity in the kit, and the air inlet pipe is used for adjusting the depth of the air inlet pipe inserted into the kit according to the data of the second humidity self-recording instrument so as to control the humidification quantity or the moisture absorption quantity; the humidity adjusting air valve is used for enabling air of the cold box and the hot box to flow between the box body and the reagent box before the test is started.
In one embodiment of the present invention, the reagent kit is divided into two spaces by a partition board, one side is a desiccant reagent kit, and the other side is a water reagent kit; the desiccant kit is movably connected with the air inlet pipe and the exhaust pipe, and the water kit is movably connected with the air inlet pipe and the exhaust pipe.
In an embodiment of the present invention, the circulation duct unit includes: the circulating air pipe, the air pipe soft joint, the axial flow fan and the circulating air valve; the air supply outlet and the air return inlet are connected with the circulating air pipe through the air pipe in a soft connection manner; the axial flow fan is fixedly arranged in the circulating air pipe and is used for enabling air to flow from the air supply outlet to the total heat exchange membrane test piece at a set speed and direction; the circulating air valve is fixedly arranged in the circulating air pipe and used for controlling the opening and closing of the circulating air pipe.
In an embodiment of the present invention, the apparatus for testing performance of a total heat exchange membrane further includes: the heat insulation layers are wrapped outside the cold box body and the hot box body, so that the external interference on the temperature inside the box bodies is prevented; the heat insulation plates are movably attached to two sides of the total heat exchange membrane clamp; the heat insulation plate is provided with a traction rope, and the cold box and the hot box are respectively provided with traction rope holes, so that when the traction rope penetrates through the traction rope holes and receives traction force, the traction rope leaves two sides of the total heat exchange membrane clamp, and the total heat exchange membrane test piece is enabled to start heat and humidity transfer.
In another aspect, the present invention provides a performance testing system for a total heat exchange membrane, where the performance testing system for a total heat exchange membrane includes: a performance testing device of the total heat exchange membrane and a performance evaluation device of the total heat exchange membrane; the performance testing device of the total heat exchange membrane is in communication connection with the performance evaluation equipment of the total heat exchange membrane; the performance testing device of the total heat exchange membrane comprises: a cold box and a hot box; the total heat exchange membrane clamp is arranged between the cold box and the hot box, is fixedly connected with the cold box and the hot box, and is clamped and connected with the total heat exchange membrane test piece; the test working condition adjusting unit is fixedly connected with the cold box and the hot box and is used for adjusting the temperature and the humidity in the cold box and the hot box; the temperature self-recording instrument is fixedly connected with the cold box and the hot box and is used for recording the temperature in the cold box and the temperature in the hot box; the first humidity self-recording instrument is fixedly connected with the cold box and the hot box and is used for recording the humidity in the cold box and the humidity in the hot box; the performance evaluation equipment of the total heat exchange membrane is used for evaluating the heat and humidity performance of the total heat exchange membrane test piece.
As described above, the performance testing device and system for total heat exchange membranes according to the present invention have the following beneficial effects:
(1) the coupling effect between the heat transfer and the moisture transfer of the material is considered, and the blank in the aspect of the coupling test of the heat and moisture performance of the total heat exchange membrane is made up; (2) the device takes the total heat transfer coefficient of the total heat exchange membrane including convection heat transfer into consideration; (3) compared with the existing method for measuring the heat conductivity coefficient of the material, the device disclosed by the invention can adapt to the size of the total heat exchange membrane, and is short in test time, simple to operate and low in cost.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for testing the performance of a total heat exchange membrane according to an embodiment of the present invention.
FIG. 2 is an external front view of an apparatus for testing the performance of a total heat exchange membrane of the present invention in one embodiment.
FIG. 3 is a top view of the testing apparatus for the performance of the total heat exchange membrane of the present invention.
FIG. 4 is a schematic view of an internal box of an apparatus for testing the performance of a total heat exchange membrane of the present invention in one embodiment.
FIG. 5 is a schematic view of a fixture of an apparatus for testing performance of a total heat exchange membrane of the present invention in an embodiment.
Fig. 6 is a schematic view of an insulation board of the performance testing apparatus for total heat exchange membrane of the present invention in an embodiment.
FIG. 7 is a schematic structural diagram of a system for testing the performance of a total heat exchange membrane according to an embodiment of the present invention.
Description of the element reference numerals
Hierarchical label names
1 Cold box
11 air supply outlet
12 air return inlet
13 gas transmission pipe interface
14 hauling rope hole
2 Heat box
3 full heat exchange membrane anchor clamps
31 full heat exchange membrane fixing clamp
32 clamp cover plate
4 test condition adjusting unit
41 temperature regulating unit
411 heater device
42 humidity adjusting unit
421 gas delivery pipe
422 air inlet pipe
423 exhaust pipe
424 humidity regulating air valve
425 second humidity self-recording instrument
426 kit
426A desiccant kit
426B Water kit
43 circulation air pipe unit
431 circulating air pipe
432 air hose
433 axial flow fan
434 circulating air valve
5 temp. self-recording instrument
6 first humidity self-recording instrument
7 heat preservation board
71 traction rope
8 total heat exchange membrane test piece
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
The invention provides a device and a system for testing the heat and humidity performance of a total heat exchange membrane, which make up for the blank of evaluating the performance of the total heat exchange membrane in the relevant specifications of the existing total heat exchangers at home and abroad. The device solves the problems that the existing membrane performance testing device can not adapt to the size of the total heat exchange membrane, only considers the self heat conduction and humidity transfer performance of the membrane material and neglects the air flow to cause the heat transfer and humidity transfer and can not carry out the heat and humidity performance coupling test, so as to guide the selection of the total heat exchange membrane in the design and manufacture process of the total heat exchanger and the improvement in the production and manufacture process of the total heat exchange membrane.
The principle and the implementation of the apparatus and the system for testing the performance of the total heat exchange membrane of the present embodiment will be described in detail below with reference to fig. 1 to 7, so that those skilled in the art can understand the apparatus and the system for testing the performance of the total heat exchange membrane of the present embodiment without creative efforts.
Note that, if the position of a component which is not numbered in fig. 2 to 6 is symmetrical or similar to that of a component with a known number, the name of the component is the same as the technical role played.
Please refer to fig. 1 and fig. 2, which respectively show a schematic structural diagram of an apparatus for testing performance of an all heat exchange membrane of the present invention in an embodiment and an external front view of the apparatus for testing performance of an all heat exchange membrane of the present invention in an embodiment. As shown in fig. 1 and fig. 2, the performance testing apparatus for a total heat exchange membrane provided by the present invention comprises: the device comprises a cold box 1, a hot box 2, a total heat exchange membrane clamp 3, a test condition adjusting unit 4, a temperature self-recording instrument 5, a first humidity self-recording instrument 6 and a heat insulation plate 7. And putting the total heat exchange membrane test piece 8 into the performance testing device of the total heat exchange membrane for performance testing.
Please refer to fig. 3, which is a top view of the performance testing apparatus of the total heat exchange membrane according to an embodiment of the present invention. As shown in fig. 3, in an embodiment, air inlets are respectively disposed on upper sides of the cold box 1 and the hot box 2, the air inlets include an air supply opening 11 and an air return opening 12, and the air supply opening 11 and the air return opening 12 enable air to flow from the air supply opening 11 to the total heat exchange membrane test piece at a set speed and direction through operation of the test condition adjusting unit 4; the air supply outlet 11 is provided with a flow deflector for controlling the direction of air flowing into the cold box and the hot box.
The heat-insulating layers are wrapped outside the cold box 1 and the hot box 2, so that the external interference on the temperature inside the boxes is prevented. The cold box 1 and the hot box 2 are used for constructing temperature difference and humidity difference on two sides of a full heat exchange membrane, and the front side cover plate of the cold box 1 and the front side cover plate of the hot box 2 can be opened for overhauling the device.
Please refer to fig. 4, which is a schematic diagram of an internal box of an embodiment of a device for testing performance of a total heat exchange membrane of the present invention. The side surface of the cold box 1 is provided with a gas pipe interface 13 and a hauling rope hole 14.
The total heat exchange membrane clamp 3 is arranged between the cold box 1 and the hot box 2, fixedly connected with the cold box 1 and the hot box 2, and clamped and connected with the total heat exchange membrane test piece 8.
Fig. 5 is a schematic view of a fixture of an apparatus for testing performance of a total heat exchange membrane according to an embodiment of the present invention. As shown in fig. 5, in an embodiment, the total heat exchange membrane fixture 3 is provided with a test piece slit around for the total heat exchange membrane test piece to be inserted into and fix the total heat exchange membrane test piece 8, so that the test piece is connected to the test box for facilitating heat and moisture transfer in the box.
The total heat exchange membrane fixture 3 is provided with a total heat exchange membrane fixing clamp 31 for fixing the total heat exchange membrane test piece. The clamp cover plate 32 on the total heat exchange membrane clamp 3 can be opened, so that the sample installation and the clamp overhaul and replacement are convenient.
And the test working condition adjusting unit 4 is fixedly connected with the cold box 1 and the hot box 2 and is used for adjusting the temperature and the humidity in the cold box 1 and the hot box 2.
Referring to fig. 1, as shown in fig. 1, the test condition adjusting unit 4 includes a temperature adjusting unit 41, a humidity adjusting unit 42, and a circulating air pipe unit 43.
The temperature adjusting unit 41 is fixedly connected with the cold box 1 and is used for adjusting the temperature of the cold box 1 before the formal test is started; the other temperature adjusting unit 41 is fixedly connected with the hot box 2 and is used for adjusting the temperature of the hot box 2 before the test formally starts.
Specifically, the temperature adjusting unit 41 includes: a heater device 411; the heater device 411 is fixedly connected with the cold box and the hot box, and is used for adjusting the air temperature in the cold box 1 and the air temperature in the hot box 2 to reach the preset temperature of the cold box 1 and the hot box 2 before the test formally starts. The heater means 411 are arranged both in the cold box 1 and in the hot box 2.
The humidity adjusting unit 42 is fixedly connected with the cold box 1 and is used for adjusting the humidity of the cold box 1 before the formal test begins; the other humidity adjusting unit 42 is fixedly connected to the hot box 2, and is used for adjusting the humidity of the hot box 2 before the test is formally started.
Referring to fig. 2 and 3, in particular, the humidity adjusting unit 42 includes: a gas delivery pipe 421, a gas inlet pipe 422, an exhaust pipe 423, a humidity adjusting air valve 424, a second humidity self-recording instrument 425 and a reagent box 426. The gas pipe 421 includes a humidity-adjusting axial-flow fan.
The side of the cold box 1 is provided with a gas pipe interface 13, and the hot box 2 is arranged in the same way. One end of the air pipe 421 is fixedly connected with the air pipe connector 13, the other end of the air pipe is movably connected with the kit 426, and before the test is started, the air humidity in the cold box 1 and the hot box 2 is adjusted, so that the air in the cold box 1 and the hot box 2 reaches the requirement of the initial humidity of the test.
The air inlet pipe 422 and the air outlet pipe 423 are fixedly connected to branch pipes of the air delivery pipe 421, the air inlet pipe 422 and the air outlet pipe 423 are respectively provided with a humidity adjusting air valve 424 and a second humidity self-recording instrument 425, the second humidity self-recording instrument 425 is used for monitoring air humidity change in the reagent kit 426 before a test is started, and the air inlet pipe 422 is used for adjusting the depth of inserting into the reagent kit 426 according to data of the second humidity self-recording instrument 425 so as to control humidification quantity or moisture absorption quantity; the humidity control damper 424 is used to allow the air in the cold box 1 and the hot box 2 to flow between the boxes and the reagent cartridge 426 before the test is started.
It should be noted that the second self-humidity meter 425 and the temperature self-recorder are integrated measuring instruments, and are used for monitoring the air temperature and humidity change in the reagent kit 426 before the test is started.
Referring to fig. 1, as shown in fig. 1, the reagent kit 426 is divided into two spaces by a partition board, one side is a desiccant reagent kit 426A, and the other side is a water reagent kit 426B; the desiccant kit 426A is movably connected with the air inlet pipe 422 and the exhaust pipe 423, and the water kit 426B is movably connected with the air inlet pipe 422 and the exhaust pipe 423. Before the test is started, the humidity adjusting air valve 424 installed in the air conveying pipe 421 is opened, air in the cold box 1 and the hot box 2 respectively enters the kit 426 through the axial flow fan in the air conveying pipe 421 to flow, and when the humidity of the air in the cold box 1 and the humidity of the air in the hot box 2 meet the requirement, the humidity adjusting air valve 424 in the air conveying pipe 421 is closed. The depth of the air inlet pipe 422 inserted into the desiccant cartridge 426A or the water cartridge 426B may be adjusted according to the temperature and humidity of the air to control the amount of humidification or moisture absorption.
The circulating air pipe unit 43 is fixedly connected with the cold box 1 and is used for enabling air in the cold box 1 to flow from the air supply outlet to the total heat exchange membrane test piece 8 at a set speed and direction; the other circulating air duct unit 43 is fixedly connected to the heat box 2, and is used for flowing the air in the heat box 2 from the air supply outlet to the total heat exchange membrane test piece 8 at a set speed and direction.
Referring to fig. 1, as shown in fig. 1, the circulating duct unit 43 includes: a circulating air pipe 431, an air pipe soft joint 432, an axial flow fan 433 and a circulating air valve 434. The circulating air pipe 431 and the air pipe 421 are both called connecting air pipes.
The air supply outlet 11 and the air return outlet 12 are connected with the circulating air pipe 431 through the air pipe soft joint 432; the axial flow fan 433 is fixedly arranged in the circulating air pipe 431 and is used for enabling air to flow from the air supply outlet to the total heat exchange membrane test piece 8 at a set speed and direction so as to realize circulation of air in the cold box 1 and the hot box 2; the circulation air valve 434 is fixedly disposed in the circulation air pipe 431 and is used for controlling the opening and closing of the circulation air pipe 431.
The heat preservation layer is also installed on the outer side of the circulating air pipe, so that the influence of the external environment on the internal temperature of the box body when air flows in the circulating air pipe 431 is avoided.
The temperature self-recording instrument 5 is fixedly connected with the cold box 1 and the hot box 2 and is used for recording the temperature in the cold box 1 and the hot box 2.
The first humidity self-recording instrument 6 is fixedly connected with the cold box 1 and the hot box 2 and is used for recording the humidity in the cold box 1 and the hot box 2.
It should be noted that, the temperature and humidity test in the box body adopts an instrument for measuring temperature and humidity integrally, and is described separately in the figures for the convenience of distinguishing. For the sake of distinction, the humidity self-meters in the cold box and the hot box are referred to as a first humidity self-meter, and the humidity self-meter in the humidity adjusting unit is referred to as a second humidity self-meter.
Referring to fig. 2 and 6, the heat insulation boards 7 are movably attached to two sides of the total heat exchange membrane clamp 3, and are placed on two sides of the total heat exchange membrane clamp 3 before the formal test begins, so that the air temperatures of the cold box 1 and the hot box 2 are maintained at the initial required temperatures. The heat insulation plate 7 is provided with a traction rope 71, the cold box 1 is provided with a traction rope hole 14, and the hot box 2 is arranged in a similar manner, so that when the traction rope 71 penetrates through the traction rope hole 13 to receive traction force, the traction rope leaves the two sides of the total heat exchange membrane clamp 3, and the total heat exchange membrane test piece 8 is enabled to start heat and humidity transfer.
Specifically, the heat insulation plates 7 are respectively placed inside the cold box 1 and the hot box 2. Before the test starts, the heat preservation plate 7 is tightly attached to two sides of the total heat exchange membrane clamp 3, and initial condition heat preservation control is carried out on the cold box 1 and the hot box 2. When the test is started, the pulling rope 71 fixed on the heat insulation board 7 is pulled outside the cold box 1 and the hot box 2 to tilt.
Please refer to fig. 7, which is a schematic structural diagram of a performance testing system of a total heat exchange membrane according to an embodiment of the present invention. As shown in fig. 7, the performance testing system for the total heat exchange membrane provided by the present invention includes: a performance testing device A of the total heat exchange membrane and a performance evaluation device B of the total heat exchange membrane.
And the performance testing device A of the total heat exchange membrane is in communication connection with the performance evaluation equipment B of the total heat exchange membrane.
Specifically, the temperature and humidity data recorded in the performance testing device a of the total heat exchange membrane are uploaded to the performance evaluation device B of the total heat exchange membrane through a USB data line.
The performance testing device A of the total heat exchange membrane comprises: a cold box and a hot box; the total heat exchange membrane clamp is arranged between the cold box and the hot box, is fixedly connected with the cold box and the hot box, and is clamped and connected with the total heat exchange membrane test piece; the test working condition adjusting unit is fixedly connected with the cold box and the hot box and is used for adjusting the temperature and the humidity in the cold box and the hot box; the temperature self-recording instrument is fixedly connected with the cold box and the hot box and is used for recording the temperature in the cold box and the temperature in the hot box; and the first humidity self-recording instrument is fixedly connected with the cold box and the hot box and is used for recording the humidity in the cold box and the hot box.
And the performance evaluation equipment B of the total heat exchange membrane is used for evaluating the heat and humidity performance of the total heat exchange membrane test piece.
In this embodiment, the apparatus B for evaluating the performance of a total heat exchange membrane includes: a processor, memory, transceiver, communication interface, or/and system bus; the memory and the communication interface are connected with the processor and the transceiver through a system bus and complete mutual communication, the memory is used for storing a computer program, the communication interface is used for communicating with other equipment, and the processor and the transceiver are used for operating the computer program so that the performance evaluation equipment of the total heat exchange membrane can carry out performance test on the total heat exchange membrane test piece.
The above-mentioned system bus may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The system bus may be divided into an address bus, a data bus, a control bus, and the like. The communication interface is used for realizing communication between the database access device and other equipment (such as a client, a read-write library and a read-only library). The Memory may include a Random Access Memory (RAM), and may further include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory.
The Processor may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components.
In conclusion, the performance testing device and system for the total heat exchange membrane provided by the invention make up for the blank of the performance evaluation of the total heat exchange membrane in the relevant specifications of the existing total heat exchanger at home and abroad. The device solves the problems that the existing membrane performance testing device can not adapt to the size of the total heat exchange membrane, only considers the self heat conduction and humidity transfer performance of the membrane material and neglects the air flow to cause the heat transfer and humidity transfer and can not carry out the heat and humidity performance coupling test, so as to guide the selection of the total heat exchange membrane in the design and manufacture process of the total heat exchanger and the improvement in the production and manufacture process of the total heat exchange membrane. The coupling effect between the heat transfer and the moisture transfer of the material is considered, and the blank in the aspect of the coupling test of the heat and moisture performance of the total heat exchange membrane is made up; the device takes the total heat transfer coefficient of the total heat exchange membrane including convection heat transfer into consideration; compared with the existing method for measuring the heat conductivity coefficient of the material, the device disclosed by the invention can adapt to the size of the total heat exchange membrane, and is short in test time, simple to operate and low in cost. The invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The performance testing device for the total heat exchange membrane is characterized in that a total heat exchange membrane test piece is put into the performance testing device for the total heat exchange membrane for performance testing, and the performance testing device for the total heat exchange membrane comprises:
a cold box and a hot box;
the total heat exchange membrane clamp is arranged between the cold box and the hot box, is fixedly connected with the cold box and the hot box, and is clamped and connected with the total heat exchange membrane test piece;
the test working condition adjusting unit is fixedly connected with the cold box and the hot box and is used for adjusting the temperature and the humidity in the cold box and the hot box;
the temperature self-recording instrument is fixedly connected with the cold box and the hot box and is used for recording the temperature in the cold box and the temperature in the hot box;
and the first humidity self-recording instrument is fixedly connected with the cold box and the hot box and is used for recording the humidity in the cold box and the hot box.
2. The performance testing device of the total heat exchange membrane according to claim 1,
test piece strip slits are arranged around the total heat exchange membrane clamp and used for inserting the total heat exchange membrane test piece;
and the total heat exchange membrane fixture is provided with a total heat exchange membrane fixing clamp for fixing the total heat exchange membrane test piece.
3. The performance testing device of the total heat exchange membrane according to claim 1,
the upper sides of the box bodies of the cold box and the hot box are respectively provided with an air supply outlet and an air return inlet, and the air supply outlet and the air return inlet enable air to flow from the air supply outlet to the total heat exchange membrane test piece at a set speed and direction through the operation of the test working condition adjusting unit;
the air supply opening is provided with a flow deflector which is used for controlling the direction of air flowing into the cold box and the hot box.
4. The apparatus for testing the performance of a total heat exchange membrane according to claim 3,
the test working condition adjusting unit comprises a temperature adjusting unit, a humidity adjusting unit and a circulating air pipe unit;
the temperature adjusting unit is fixedly connected with the cold box and is used for adjusting the temperature of the cold box before the formal test is started; the other temperature adjusting unit is fixedly connected with the hot box and is used for adjusting the temperature of the hot box before the formal test is started;
the humidity adjusting unit is fixedly connected with the cold box and used for adjusting the humidity of the cold box before the formal test is started; the other humidity adjusting unit is fixedly connected with the hot box and is used for adjusting the humidity of the hot box before the formal test is started;
the circulating air pipe unit is fixedly connected with the cold box and is used for enabling air in the cold box to flow to the total heat exchange membrane test piece from the air supply outlet at a set speed and direction; and the other circulating air pipe unit is fixedly connected with the hot box and is used for enabling the air in the hot box to flow to the total heat exchange membrane test piece from the air supply outlet at a set speed and direction.
5. The apparatus for testing the performance of a total heat exchange membrane according to claim 4,
the temperature adjusting unit includes: a heater device;
the heater device is fixedly connected with the cold box and the hot box and used for adjusting the air temperature in the cold box and the hot box to reach the preset temperature of the cold box and the hot box before the test formally starts.
6. The apparatus for testing the performance of a total heat exchange membrane according to claim 4,
the humidity adjustment unit includes: the device comprises a gas delivery pipe, a gas inlet pipe, a gas outlet pipe, a humidity adjusting air valve, a second humidity self-recording instrument and a kit; the gas transmission pipe comprises a humidity adjusting axial flow fan;
the cold box and the hot box are provided with gas pipe interfaces on the side surfaces, one end of each gas pipe is fixedly connected with the gas pipe interface, the other end of each gas pipe is movably connected with the kit, and the humidity of the air in the cold box and the humidity of the air in the hot box are adjusted before the test is started;
the air inlet pipe and the exhaust pipe are fixedly connected to branch pipes of the air conveying pipe, the air inlet pipe and the exhaust pipe are respectively provided with a humidity adjusting air valve and a second humidity self-recording instrument, the second humidity self-recording instrument is used for monitoring the air humidity in the kit, and the air inlet pipe is used for adjusting the depth of the air inlet pipe inserted into the kit according to the data of the second humidity self-recording instrument so as to control the humidification quantity or the moisture absorption quantity; the humidity adjusting air valve is used for enabling air of the cold box and the hot box to flow between the box body and the reagent box before the test is started.
7. The apparatus for testing the performance of a total heat exchange membrane according to claim 6,
the kit is divided into two spaces by a partition plate, one side is provided with a desiccant kit, and the other side is provided with a water kit; the desiccant kit is movably connected with the air inlet pipe and the exhaust pipe, and the water kit is movably connected with the air inlet pipe and the exhaust pipe.
8. The apparatus for testing the performance of a total heat exchange membrane according to claim 4,
the circulation air duct unit includes: the circulating air pipe, the air pipe soft joint, the axial flow fan and the circulating air valve;
the air supply outlet and the air return inlet are connected with the circulating air pipe through the air pipe in a soft connection manner;
the axial flow fan is fixedly arranged in the circulating air pipe and is used for enabling air to flow from the air supply outlet to the total heat exchange membrane test piece at a set speed and direction;
the circulating air valve is fixedly arranged in the circulating air pipe and used for controlling the opening and closing of the circulating air pipe.
9. The apparatus for testing the performance of the total heat exchange membrane according to claim 1, further comprising:
the heat insulation layers are wrapped outside the cold box body and the hot box body, so that the external interference on the temperature inside the box bodies is prevented;
the heat insulation plates are movably attached to two sides of the total heat exchange membrane clamp;
the heat insulation plate is provided with a traction rope, and the cold box and the hot box are respectively provided with traction rope holes, so that when the traction rope penetrates through the traction rope holes and receives traction force, the traction rope leaves two sides of the total heat exchange membrane clamp, and the total heat exchange membrane test piece is enabled to start heat and humidity transfer.
10. The performance test system for the total heat exchange membrane is characterized by comprising the following components: a performance testing device of the total heat exchange membrane and a performance evaluation device of the total heat exchange membrane;
the performance testing device of the total heat exchange membrane is in communication connection with the performance evaluation equipment of the total heat exchange membrane;
the performance testing device of the total heat exchange membrane comprises: a cold box and a hot box; the total heat exchange membrane clamp is arranged between the cold box and the hot box, is fixedly connected with the cold box and the hot box, and is clamped and connected with the total heat exchange membrane test piece; the test working condition adjusting unit is fixedly connected with the cold box and the hot box and is used for adjusting the temperature and the humidity in the cold box and the hot box; the temperature self-recording instrument is fixedly connected with the cold box and the hot box and is used for recording the temperature in the cold box and the temperature in the hot box; the first humidity self-recording instrument is fixedly connected with the cold box and the hot box and is used for recording the humidity in the cold box and the humidity in the hot box;
the performance evaluation equipment of the total heat exchange membrane is used for evaluating the heat and humidity performance of the total heat exchange membrane test piece.
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