CN109357755B - System and method for testing solar radiation transmission of glass - Google Patents
System and method for testing solar radiation transmission of glass Download PDFInfo
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- CN109357755B CN109357755B CN201811185566.0A CN201811185566A CN109357755B CN 109357755 B CN109357755 B CN 109357755B CN 201811185566 A CN201811185566 A CN 201811185566A CN 109357755 B CN109357755 B CN 109357755B
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- 230000005855 radiation Effects 0.000 title claims abstract description 72
- 239000011521 glass Substances 0.000 title claims abstract description 47
- 238000012360 testing method Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000005540 biological transmission Effects 0.000 title claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 191
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 191
- 238000005485 electric heating Methods 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 239000003973 paint Substances 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 239000011087 paperboard Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 210000002268 wool Anatomy 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 13
- 230000032683 aging Effects 0.000 abstract description 8
- 229920000742 Cotton Polymers 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000005357 flat glass Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009795 derivation Methods 0.000 description 2
- 230000009365 direct transmission Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000006243 Fine Thermal Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J2001/4266—Photometry, e.g. photographic exposure meter using electric radiation detectors for measuring solar light
Abstract
The purpose of this application is to provide a test system and method that glass transmitted solar radiation, test system includes: the glass comprises glass to be tested, a first aluminum plate, a second aluminum plate, an electric heating film and a baffle plate, wherein a black paint is coated on the first surface of the first aluminum plate and placed under the glass to be tested, so that the first surface of the first aluminum plate absorbs solar radiation passing through the glass to be tested; the baffle is an opaque paperboard and is used for preventing the first surface of the second aluminum plate from absorbing solar radiation; coating black paint on the first surface of the second aluminum plate, and placing the second aluminum plate behind the baffle; the electric heating film is placed on the first surface of the second aluminum plate and used for heating the second aluminum plate. Therefore, the solar radiation amount is obtained according to the heating power required when the second aluminum plate is heated to the same temperature as the first aluminum plate, the indoor air temperature and the ambient temperature, and the measurement error caused by the aging of circuits and elements in the measurement radiation meter is avoided.
Description
Technical Field
The application relates to the field of testing of solar radiation absorption, in particular to a system and a method for testing solar radiation transmission of glass.
Background
At present, the measurement of solar radiation is generally carried out by using an electronic instrument, the instrument may cause the change of metering characteristics due to the aging of materials, the change of use or storage environment, the transportation and other reasons, the aging of an integrated circuit and elements inside an integrated amplifier inside a measurement radiometer can cause measurement errors, and some measurement solar radiometers are inconvenient to carry and use.
Disclosure of Invention
The purpose of the application is to provide a system and a method for testing the transmission of solar radiation of glass, so as to solve the problem of measurement errors caused by the aging of the integrated circuit and the internal elements of an integrated amplifier inside a measurement radiation meter.
To solve the above technical problem, according to an aspect of the present application, there is provided a glass transmission solar radiation testing system, including: the glass plate comprises glass to be tested, a first aluminum plate, a second aluminum plate, an electric heating film and a baffle plate, wherein the first aluminum plate comprises a first aluminum plate first surface and a first aluminum plate second surface, the second aluminum plate comprises a second aluminum plate first surface and a second aluminum plate second surface, the first aluminum plate first surface is coated with black paint, and the first aluminum plate first surface is placed under the glass to be tested, so that the first aluminum plate first surface absorbs solar radiation after passing through the glass to be tested;
the baffle is an opaque paperboard and is used for preventing the first surface of the second aluminum plate from absorbing solar radiation;
coating black paint on the first surface of the second aluminum plate, and placing the second aluminum plate behind the baffle;
the electric heating film is placed on the first surface of the second aluminum plate and used for heating the second aluminum plate.
Further, the first aluminum plate and the second aluminum plate are placed in the same environment in which the indoor air temperature and the ambient temperature are the same.
Further, the first aluminum plate and the second aluminum plate are determined by cutting aluminum plates made of the same material uniformly.
Further, the test system comprises heat preservation cotton arranged on the second surface of the first aluminum plate and the second surface of the second aluminum plate.
According to another aspect of the present application, there is also provided a method for testing the transmission of solar radiation of a glass, using the test system described above, comprising:
obtaining the temperature of an aluminum plate of a first aluminum plate positioned below glass to be tested in a preset placing time;
determining the heating power required for heating the temperature of the second aluminum plate to the temperature of the aluminum plate through the electric heating film;
and determining the solar radiation information penetrating through the glass to be tested according to the indoor air temperature, the ambient temperature and the heating power of the first aluminum plate and the second aluminum plate.
Compared with the prior art, the application provides a test system and a method for the transmission of solar radiation of glass, and the test system comprises: the glass testing device comprises glass to be tested, a first aluminum plate, a second aluminum plate, an electric heating film and a baffle plate, wherein a black paint is coated on the first surface of the first aluminum plate, and the first aluminum plate is placed under the glass to be tested, so that the first surface of the first aluminum plate absorbs solar radiation after passing through the glass to be tested; the baffle is an opaque paperboard and is used for preventing the first surface of the second aluminum plate from absorbing solar radiation; coating black paint on the first surface of the second aluminum plate, and placing the second aluminum plate behind the baffle; the electric heating film is placed on the first surface of the second aluminum plate and used for heating the second aluminum plate. Therefore, the solar radiation amount is obtained according to the heating power required when the second aluminum plate is heated to the same temperature as the first aluminum plate, the indoor air temperature and the ambient temperature, the solar radiation amount can be measured more accurately, quickly and conveniently, and the measurement error caused by aging of instruments is effectively avoided.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic flow chart of a method for testing the transmission of solar radiation by a glass according to another aspect of the present disclosure.
The same or similar reference numbers in the drawings identify the same or similar elements.
Detailed Description
The present application is described in further detail below with reference to the attached figures.
According to one aspect of the present application there is provided a glass solar radiation transmission test system, the test system comprising: the glass plate comprises glass to be tested, a first aluminum plate, a second aluminum plate, an electric heating film and a baffle plate, wherein the first aluminum plate comprises a first aluminum plate first surface and a first aluminum plate second surface, the second aluminum plate comprises a second aluminum plate first surface and a second aluminum plate second surface, the first aluminum plate first surface is coated with black paint, and the first aluminum plate first surface is placed under the glass to be tested, so that the first aluminum plate first surface absorbs solar radiation after passing through the glass to be tested; the baffle is an opaque paperboard and is used for preventing the first surface of the second aluminum plate from absorbing solar radiation; coating black paint on the first surface of the second aluminum plate, and placing the second aluminum plate behind the baffle; the electric heating film is placed on the first surface of the second aluminum plate and used for heating the second aluminum plate. Here, the first aluminum plate and the second aluminum plate are determined by cutting aluminum plates of the same material. The first aluminum plate is placed below the outer window glass, the second aluminum plate is placed in a place where solar radiation cannot reach under the same environment, the two aluminum plates are cut from the same aluminum plate with uniform material, the consistency of the material is guaranteed, in the embodiment of the application, the size of the first aluminum plate and the size of the second aluminum plate are 20mm multiplied by 20mm, and the thickness of the first aluminum plate and the thickness of the second aluminum plate are 10 mm. The first surface of the first aluminum plate and the first surface of the second aluminum plate are coated with black paint, so that the aluminum plates can fully absorb solar radiation, and the surface radiances of the first surface of the first aluminum plate and the first surface of the second aluminum plate are consistent, and the solar radiation absorptivity of the surfaces of the aluminum plates is nearly 1. In a specific application scene of the application, the three-glass two-cavity energy-saving glass is placed on an indoor window frame and fixed, the region outside the test glass is shielded by an opaque paperboard, so that sunlight is prevented from irradiating from the place outside the experimental glass, and a first aluminum plate is placed below the test glass and can be completely irradiated by solar radiation; and placing the second aluminum plate at a place which cannot be irradiated by solar radiation, and attaching an electric heating film on the surface of the second aluminum plate.
Further, the first aluminum plate and the second aluminum plate are placed in the same environment in which the indoor air temperature and the ambient temperature are the same. Adopt the better pure aluminum plate of thermal conductivity as measuring tool, under the same indoor outer operating mode, indoor aluminum plate absorbs and sees through outer window (glass) shine to indoor solar radiation back temperature rise, through setting up the contrast group, another the same aluminum plate adopts the method of electrical heating membrane heating, make aluminum plate's temperature equal with the aluminum plate temperature that solar radiation shines, when reaching the stability, because two the same aluminum plates are under the same environment, therefore two aluminum plate heat dissipation capacity are equal, two aluminum plate's the gain of heat also equal, then can calculate indoor solar radiation illuminance through the indirect deduction of electric heating power. The direct transmission solar radiation of the outer window can be calculated by measuring the temperature of the aluminum plate, the temperature of indoor air and the temperature of the surrounding environment.
In the above embodiment, the test system includes heat-insulating cotton disposed on the second surface of the first aluminum plate and the second surface of the second aluminum plate. Here, the heat preservation cotton is pasted on the lower surfaces of the two aluminum plates, the first aluminum plate is placed under the tested glass for one hour, the temperature (recorded as T1) of the aluminum plate at the moment is recorded, the second aluminum plate is heated to T1 by an electric heating film with the power of 200W under the condition of completely shielding sunlight, the indoor air temperature and the ambient temperature are measured by a thermistor at the moment, the solar radiation quantity is obtained, and the measurement error caused by the aging of an integrated circuit and an internal element of an integrated amplifier inside a measurement radiation meter is avoided. Wherein, NTC thermistor can be used for measuring indoor air temperature and ambient temperature.
According to the heat balance principle, the feasibility of using the electric heating film to heat the aluminum plate instead of the solar radiation heating aluminum plate under the same indoor condition is deduced, and the relational expression between the temperature of the two aluminum plates and the solar radiation and the electric heating power which directly penetrate through the outer window and irradiate the surface of the aluminum plate is deduced. The specific derivation process is as follows:
firstly, the equivalence derivation of the temperature rise of the aluminum plate is realized by the electric heating film and the solar radiation, the two heating modes are performed under the same environmental condition, and the adopted aluminum plate is the same in specification and material:
1) under the irradiation of indoor solar radiation, the heat balance equation of the aluminum plate is as follows:
αgIz+qr.t+qr.g+qr.w+qr.c+qc.air＝0
Iz: the total solar radiation entering the room through the external window is W/square meter;
αg: the surface absorption rate of the aluminum plate is adopted;
qr.t: radiation of indoor top surface to aluminum plate, W/square meter;
qr.g: radiation of the indoor floor to the aluminum plate, W/square meter;
qr.w: radiation of an indoor vertical wall body to an aluminum plate, W/square meter;
qr.c: radiation of the external window to the aluminum plate, W/square meter;
qc.air: carrying out convection heat exchange between the aluminum plate and indoor air, and carrying out W/square meter;
2) when the electric heating film is adopted to heat the aluminum plate, the heat balance equation of the indoor aluminum plate is as follows:
We+q1 r.t+q1 r.g+q1 r.w+q1 r.c+q1 c.air＝0
We: heating power of the electric heating film is W/s;
q1 r.t: radiation of indoor top surface to aluminum plate, W/square meter;
q1 r.g: radiation of the indoor floor to the aluminum plate, W/square meter;
q1 r.w: radiation of an indoor vertical wall body to an aluminum plate, W/square meter;
q1 r.c: radiation of the external window to the aluminum plate, W/square meter;
q1 c.air: carrying out convection heat exchange between the aluminum plate and indoor air, and carrying out W/square meter;
because the material and the specification of the aluminum plate are the same in the same indoor environment, the angle coefficient and the radiance between the steel plate and each wall surface are the same in the two modes, and because the temperature of each wall surface in the room and the indoor air temperature are equal in the two modes at the same time, when the temperature of the aluminum plate is equal in the two modes, the following steps are performed: q. q.sr.t＝q1 r.t、qr.g＝q1 r.g、qr.w＝q1 r.w、qr.c＝q1 r.c、qc.air＝q1 c.air；
The subtraction of the above two equations yields: alpha is alphagIz＝We；
Coating black paint on the upper surface of the steel plate under the two modes to form a surface similar to a blackbody, wherein alpha isg1, from which can be derived:
Iz＝We
namely under the same conditions: the solar radiation through the glass to the surface of the aluminum plate is equal to the electric heating power of the electric heating film to the aluminum plate.
And then, deducing a relational expression between the temperature of the aluminum plate and the solar radiation absorbed by the aluminum plate, and if the temperature is measured indoors, sticking heat-insulating cotton on the aluminum plate towards the ground side to avoid the radiation influence of the ground on the aluminum plate.
1) Radiation heat exchange: the radiant heat exchange between the aluminum plate and the surrounding surface is as follows:
in the formula, epsilonfThe long-wave radiation of the surface of the aluminum plate, sigma is Boltzmann constant, Tw is the temperature (K) of the inner wall surface of the room, and Tg is the temperature (K) of the outer window glass.
2) And (3) convective heat transfer, wherein the convective heat transfer of the surface of the aluminum plate follows Newton's cooling law: q. q.sc＝(T-Ta)
In the formula, h is the convection heat exchange of the surface of the aluminum plate; because aluminum plate has fine thermal conductivity, can think that aluminum plate is along the temperature of thickness direction is even, according to the heat transfer theory, can obtain the temperature computational formula and be:
in the formula, G is solar radiation absorbed by the aluminum plate and W/square meter.
Therefore, the direct transmission of solar radiation by the outer window can be calculated by measuring the temperature of the aluminum plate, the temperature of indoor air and the temperature of the surrounding environment.
The test system for indirectly testing the solar radiation transmitted by the outer window by replacing the solar radiation with the electrical heating equivalent can more accurately, quickly and conveniently measure the solar radiation, and effectively avoid measurement errors caused by aging of instruments.
Fig. 1 shows a schematic flow chart of a testing method for the transmission of solar radiation of glass provided according to another aspect of the present application, and the testing system described above is used, and comprises: step S11 to step S13, wherein in step S11, the temperature of the aluminum plate of the first aluminum plate under the glass to be tested is obtained when the first aluminum plate is placed for a preset placing time; the first aluminum plate is placed below the outer window glass, the second aluminum plate is placed in a place where solar radiation cannot reach under the same environment, the two aluminum plates are cut from the same aluminum plate with uniform material, the consistency of the materials is guaranteed, the first surface of the first aluminum plate and the first surface of the second aluminum plate are coated with black paint, so that the aluminum plates can fully absorb the solar radiation, the surface radiance of the first surface of the first aluminum plate and the surface radiance of the first surface of the second aluminum plate are consistent, and the solar radiation absorption rate of the surfaces of the aluminum plates is nearly 1. The lower surfaces of the two aluminum plates were covered with insulation wool, and the first aluminum plate was placed under the glass being tested for one hour and the temperature of the aluminum plate was recorded (denoted as T1). Next, in step S12, determining a heating power required to heat the temperature of the second aluminum plate to the temperature of the aluminum plate through the electric heating film; the second aluminum plate is heated to T1 by an electric heating film with power of 200W under the condition of completely blocking sunlight, and then, in step S13, the solar radiation information transmitted through the glass to be tested is determined according to the indoor air temperature where the first aluminum plate and the second aluminum plate are located, the ambient temperature and the heating power. At the moment, the thermistor is used for measuring the indoor air temperature and the ambient temperature to obtain the solar radiation amount, and measurement errors caused by aging of an integrated circuit and internal elements of an integrated amplifier in the radiation meter are avoided.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural.
Claims (5)
1. A glass solar radiation transmission test system comprising: the glass to be tested, the first aluminum plate, the second aluminum plate, the electric heating film and the baffle plate are characterized in that the first aluminum plate comprises a first aluminum plate first surface and a first aluminum plate second surface, the second aluminum plate comprises a second aluminum plate first surface and a second aluminum plate second surface,
coating black paint on the first surface of the first aluminum plate and placing the first aluminum plate under the glass to be tested so that the first surface of the first aluminum plate absorbs solar radiation after passing through the glass to be tested;
the baffle is an opaque paperboard and is used for preventing the first surface of the second aluminum plate from absorbing solar radiation;
coating black paint on the first surface of the second aluminum plate, and placing the second aluminum plate behind the baffle;
the electric heating film is placed on the first surface of the second aluminum plate and used for heating the second aluminum plate.
2. The test system of claim 1, wherein the first aluminum plate and the second aluminum plate are placed in the same environment where room air temperature and ambient temperature are the same.
3. The test system of claim 1, wherein the first aluminum plate and the second aluminum plate are cut from a uniform aluminum plate of the same material.
4. The test system of claim 1, wherein the test system comprises insulation wool disposed on the first aluminum sheet second surface and the second aluminum sheet second surface.
5. A method for testing the transmission of solar radiation of a glass, using a test system according to any one of claims 1 to 4, comprising:
obtaining the temperature of an aluminum plate of a first aluminum plate positioned below glass to be tested in a preset placing time;
determining the heating power required for heating the temperature of the second aluminum plate to the temperature of the aluminum plate through the electric heating film;
and determining the solar radiation information penetrating through the glass to be tested according to the indoor air temperature, the ambient temperature and the heating power of the first aluminum plate and the second aluminum plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811185566.0A CN109357755B (en) | 2018-10-11 | 2018-10-11 | System and method for testing solar radiation transmission of glass |
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| CN201811185566.0A CN109357755B (en) | 2018-10-11 | 2018-10-11 | System and method for testing solar radiation transmission of glass |
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| CN109357755B true CN109357755B (en) | 2021-01-29 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101576519A (en) * | 2009-06-16 | 2009-11-11 | 上海市建筑科学研究院(集团)有限公司 | Outdoor dynamic testing method for heat-insulation property of heat-insulation coating at outer wall of building |
| CN101827466A (en) * | 2010-03-30 | 2010-09-08 | 东莞宏威数码机械有限公司 | Flat heating device |
| CN104730105A (en) * | 2015-03-26 | 2015-06-24 | 浙江大学 | Device for testing solar heat gain of external window |
| CN204694662U (en) * | 2015-07-02 | 2015-10-07 | 陈琳 | The outer door and window thermal insulation performance detection device of a kind of novel building |
| KR101851209B1 (en) * | 2017-05-16 | 2018-04-23 | 주식회사 넥스필 | Measurement method of the Sun heat Protection rate using Sun heat block film |
| CN108303443A (en) * | 2018-01-09 | 2018-07-20 | 中国计量大学 | A kind of sheeting is towards heat conductivility steady-state method of test |
-
2018
- 2018-10-11 CN CN201811185566.0A patent/CN109357755B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101576519A (en) * | 2009-06-16 | 2009-11-11 | 上海市建筑科学研究院(集团)有限公司 | Outdoor dynamic testing method for heat-insulation property of heat-insulation coating at outer wall of building |
| CN101827466A (en) * | 2010-03-30 | 2010-09-08 | 东莞宏威数码机械有限公司 | Flat heating device |
| CN104730105A (en) * | 2015-03-26 | 2015-06-24 | 浙江大学 | Device for testing solar heat gain of external window |
| CN204694662U (en) * | 2015-07-02 | 2015-10-07 | 陈琳 | The outer door and window thermal insulation performance detection device of a kind of novel building |
| KR101851209B1 (en) * | 2017-05-16 | 2018-04-23 | 주식회사 넥스필 | Measurement method of the Sun heat Protection rate using Sun heat block film |
| CN108303443A (en) * | 2018-01-09 | 2018-07-20 | 中国计量大学 | A kind of sheeting is towards heat conductivility steady-state method of test |
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