CN109187629A - A kind of equivalent thermal resistance and thermal coefficient detection method of insulating mold coating for building - Google Patents
A kind of equivalent thermal resistance and thermal coefficient detection method of insulating mold coating for building Download PDFInfo
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- CN109187629A CN109187629A CN201811027650.XA CN201811027650A CN109187629A CN 109187629 A CN109187629 A CN 109187629A CN 201811027650 A CN201811027650 A CN 201811027650A CN 109187629 A CN109187629 A CN 109187629A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- 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
Abstract
The invention discloses a kind of equivalent thermal resistance of insulating mold coating for building and thermal coefficient detection method, this method includes that coating prepares, equipment preheating, data acquire and several steps such as equivalent thermal resistance calculates.The present invention can quantitatively design the equivalent thermal resistance of the blocking radiant heat of insulating mold coating for building, can respectively tell the true and false and superiority and inferiority of insulating mold coating using unit and testing agency according to equivalent thermal resistance size.Global demand has this detection device to generate as early as possible, and application market prospect is very good, has fabulous promotional value.
Description
Technical field
The invention belongs to building coating detection technique fields, and in particular to a kind of equivalent heat of insulating mold coating for building
Resistance and thermal coefficient detection method.
Background technique
Insulating mold coating for building is with efficiently to sunlight and the wide amplitude of remote middle near-infrared, heat radiation with barrier
Heat-insulated and insulation effect, excellent anti-ultraviolet property, extraordinary resistance tocrocking, good adhesive force, abrasion resistance, acid and alkali-resistance
Corrosivity and the performances such as anti-mildew, are modern architecture heat-insulation and heat-preservation field function admirable, strong applicability, one kind with high content of technology
Novel building heat preserving and insulating material.
Power saving function coating cost for building can be more much higher than common coating, but functional coating and common coating exist
Naked eyes can not identify that the function of the difference and coating that how to detect these coating becomes a big problem at all after construction.
By retrieval discovery patent announcement number be CN102980911A a kind of insulating moulding coating equivalent thermal resistance detection device and
Detection method is specifically connect with detector signal using thermocouple with solar radiation sensor, detector and computing terminal
Signal connection；Detection method includes using the thermoelectricity of glue adhesive band sheet metal respectively at the middle part of multiple exterior wall external surfaces
It is even；After glue to be pasted parches securely, in outer exterior surface of wall brushing insulating moulding coating and common coating respectively；Needs are allowed to detect outer
Wall receives solar radiation, acquires data with solar radiation sensor；Solar radiation sensor continuous acquisition chose it after seven days
In four days valid data be transmitted to computing terminal, the equivalent heat of the detection wall insulating moulding coating is extrapolated in conjunction with software for calculation
Resistance.By the above-mentioned means, the technology can be for condition required for insulating moulding coating on-site test, in conjunction with live winer construction side
Method accurately acquires data and participates in calculating, and the curve for capableing of effectively output temperature is analyzed, and the equivalent of insulating moulding coating is extrapolated
Thermal resistance.
But above-mentioned technology is a kind of method of inspection of unstable state.Error is influenced greatly to 50% by weather, and the testing time is long.
It is expensive, not applicable, and it is only suitable for the material of conduction heat transfer, be not suitable for the thermo-resistance measurement of radiation heat insulation material, while other
It also there is no the detection device and method that can detect coating power saving function in the prior art.Thus there are false coating, coating inferior
It is recognized use, so that massive losses are caused to country and user, so that really with the fabulous advanced high-tech in the whole world
Environment-friendly materials, insulating mold coating can not be examined quickly and effectively be promoted.
Summary of the invention
For overcome it is above-mentioned there are deficiency, the present inventor attempted by long-term explorations and multiple experiment with
Effort is kept reforming and is innovated, and the equivalent thermal resistance and thermal coefficient detection method of a kind of insulating mold coating for building are proposed.
Its specific technical solution is: the present invention also provides a kind of equivalent thermal resistance of insulating mold coating for building and leading
Hot coefficient detection method comprising following steps: in the area (painting apply flitch to be measured) of top plate (the as inner top panel 6 of equipment) half
On coat coating to be measured, common plastics plate tabula rasa or comparison coating are set on the area of the other half (comparison painting apply flitch)；
Data acquisition: under identical environment by data collector acquire coating to be measured and compare coating heat flow density with
Temperature；
Equivalent thermal resistance calculates: architectural heat insulation coating blocking radiant heat equivalent thermal resistance Re calculation formula are as follows: Re=R "j-
R'i
In formula:
R″j: the radiant heat flux density equivalent for applying vertical direction between insulating mold coating plastic plate and bottom plate is thermally conductive heat
The thermal resistance of current density；
R′i: it is thermally conductive for being not coated with the radiant heat flux density equivalent of vertical direction between insulating mold coating plastic plate and bottom plate
The thermal resistance of heat flow density；
Wherein R "jWith R 'iAlgorithm it is identical all, specially
In formula: S is the distance between each measuring point and corresponding measuring point (between two measuring points when being the measurement temperature difference
Away from)；
Temperature difference of the Δ T between test point；
Δ t is the interval time tested every time；
Q is heat flow density；
Δ X spacing between test point.
Calculation method about insulating mold coating equivalent thermal resistance for building:
According to Fu Li leaf law:
Q is the unit time to conduct heat；A is heat transfer base plate (partition) area；λ is thermal coefficient；For temperature gradient.
To obtain the final product to I part of top plate (top plate portion for being not coated with the top plate portion of coating or the comparison coating of painting) in Δ t
The heat of interior transmitting:
The heat transmitted within the Δ t time to II part of top plate (top plate portion for applying coating to be measured):
λ1、λ2The respectively thermal coefficient of top plate I part and II part, A1、A2Respectively I part of top plate and II part
Area.
Only considered when the heat of vertical direction transmitting simultaneously: and have(A is heat transfer base plate area/partition
Area)
The thermal resistance that I part is transmitted within the Δ t time
The thermal resistance that II part is transmitted within the Δ t time
(Δ t is the test interval)
It will 3. substitute into 1.；4. 2. substituting into then has
λ1For I part equivalent heat conductivity of top plate；λ2For II part equivalent heat conductivity of top plate；
Then have:
I part of top plate: equivalent thermal resistance
Equivalent thermal resistance
Equivalent thermal resistance
Wherein: (the equivalent thermal resistance that thermal resistance R ' is I part of top plate) (the equivalent thermal resistance that thermal resistance R " is II part of top plate)
II part of top plate:
N is indicated in formula: the number of I part or II part thermal resistance, two-part thermal resistance number are identical.
Insulating mold coating equivalent thermal resistance: Re=R "j-R'i
Insulating mold coating average equivalent thermal resistance:
To obtain the equivalent thermal resistance (average equivalent thermal resistance) of above-mentioned architectural heat insulation coating.
In above-mentioned formula: i is i-th of I part of top plate measuring point；J is j-th of II part of top plate measuring point；I part of top plate does not apply
Coating or the coating applied are different coating from the coating (insulating mold coating for building) on top plate II.
The equivalent thermal resistance and thermal coefficient detection method of a kind of insulating mold coating for building according to the present invention, into
One step technical solution be, for detection device room temperature be 25 DEG C, water content in air are as follows: 60% ± 5%.
Compared with prior art, technical solution of the present invention have the following advantages that/the utility model has the advantages that
1) present invention test is simple, and the testing time is short, it is only necessary to the time in 7 minutes.
It 2) is the closed test under same environment when present invention test, accuracy is high.
3) device structure of the invention is simple, equipment cost is low, and testing cost is low, is suitble to be widely popularized.
The present invention can quantitatively design the equivalent thermal resistance of the heat-insulated resistance of insulating mold coating for building, according to equivalent thermal resistance
Size can respectively tell the true and false and superiority and inferiority of insulating mold coating using unit and testing agency.Global demand has this design to the greatest extent
Fast to generate, application market prospect is very good, has fabulous promotional value.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of embodiment of the present invention
Attached drawing be briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not to be seen as
It is the restriction to range, it for those of ordinary skill in the art, without creative efforts, can be with root
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is equipment diagrammatic cross-section in the present invention.
Fig. 3 is insulating mold coating equivalent thermo-resistance measurement table.
In figure: incubator 1, test chamber 101, heating chamber 102, support frame 103, partition 2, mounting rack 3, mounting plate 301, heat
Current density piece 4, thermocouple 5, inner top panel 6, heat source 7, water inlet pipe 701, outlet pipe 702.
Specific embodiment
Attached drawing is described in detail in embodiment of the present invention, the technical solution in invention embodiment is carried out clear
Chu is fully described by, it is clear that described embodiment is some embodiments of the invention, rather than whole embodiment party
Formula.It is obtained by those of ordinary skill in the art without making creative efforts based on the embodiment in invention
Every other embodiment shall fall within the protection scope of the present invention.Therefore, the implementation of the invention to providing in the accompanying drawings below
The detailed description of mode is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Mode.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then it further can not be defined and explained in subsequent attached drawing.
Embodiment
As shown in Figure 1, 2, data are acquired for convenience, the present invention first proposes a kind of insulation painting for building
Expect the equivalent thermal resistance detection device of blocking radiant heat.The detection device includes heat source 7 and incubator 1, and heat source is connected to heating chamber
And stable thermal energy is provided for heating chamber.Wherein heat source 7 is using boiling water constant temperature boiler.Then one is installed in incubator 1
A support frame 103, support frame 103 are tightly attached on 1 inner wall of incubator, and its height is less than the inner space height of incubator 1.So
Partition 2 made of plastic plate are installed on support frame 103 afterwards, incubator 1 is divided into two mutually indepedent skies by such partition 2
Between, respectively test chamber 101 and heating chamber 102.Then heating chamber 102 passes through water inlet pipe 701 and outlet pipe 702 and boiling water constant temperature
Boiler connection, forming water circulation heating keeps the temperature in incubator relatively stable.Heating chamber is formed by two layers, and outer layer is thermal insulating material
The bed of material, internal layer are stainless steel layer, to outer heat insulation while may be implemented internal thermally conductive in this way.
Mounting rack 3 is provided in the test chamber 101, mounting rack 3 is using stainless steel frame.Then on mounting rack 3
There is two layers or two layers or more of rice font nonmetallic materials mounting plate 301, is arranged on mounting plate 301 for acquiring related data
Heat flow density piece 4 and thermocouple 5, mounting plate 301 be non-metallic plates.When installation, the both ends of heat flow density piece 4 respectively fill one
A thermocouple 5, thermocouple 5 connect moisture recorder, and heat flow density piece 4 connects heat flow density recorder.Then every two thermoelectricity
It is even to form a test point, space temperature and unit time mainly for detection of coating with a heat flow density piece matched combined
Heat flow.Multiple test points are installed on every layer of mounting plate 301 as needed so that acquisition data it is more accurate, every layer it
Between test point be in same vertical line.The box roof of the incubator is set as the inner top panel 6 of plastic plate production, interior top
Plate 6 has been divided into painting apply flitch to be measured and comparison painting apply flitch two parts.Spacing when specific setting between inner top panel 6 and partition 2 is big
In 1000mm, cabinet length is greater than 2000mm, and such apart from size is because volume is big, and the error of test is just small.
The top panel (inner top panel) of incubator 1 described in the present embodiment is standard plastic plate, the test chamber surrounding of upper part
For insulation board, heats cavity plate and be made of outer layer standard incubation plate and internal layer standard stainless steel plate.The equivalent thermal resistance measured in this way
Index will not be affected because of materials variances.
Within a certain period of time, the thermal resistance average value of each measuring point of coating portion to be measured subtracts the concrete operating principle of this detection device
Compare each measuring point thermal resistance average value of coating portion.As architectural heat insulation coating equivalent thermal resistance.
Based on above-mentioned detection device, the equivalent thermal resistance of a kind of insulating mold coating for building of offer of the invention and thermally conductive
Coefficient detection method, specific as follows:
1, one semi-area is allowed to coat insulating mold coating to be measured on inner top panel, another semi-area is tabula rasa, this reality
Apply all coating in example with a thickness of 0.3mm, due to manually smearing, difference in thickness control within 10%.
2, equipment preheats: heat source is opened, until the temperature in incubator stablizes (environment temperature as tested)；
3, data acquire: acquiring the heat flow density in each test point by data collector；
4, equivalent thermal resistance calculates: Computing Principle is: architectural heat insulation coating blocking radiant heat equivalent thermal resistance Re calculates public
Formula are as follows: Re=R "j-R'i
In formula:
R″j: the radiant heat flux density equivalent for applying vertical direction between insulating mold coating plastic plate and bottom plate is thermally conductive heat
The thermal resistance of current density；
R′i: it is thermally conductive for being not coated with the radiant heat flux density equivalent of vertical direction between insulating mold coating plastic plate and bottom plate
The thermal resistance of heat flow density；
Wherein R "jWith R 'iAlgorithm it is identical all, specially
In formula: S is the distance between each measuring point and corresponding measuring point (between two measuring points when being the measurement temperature difference
Away from)；
Temperature difference of the Δ T between test point；
Δ t is the interval time tested every time；
Q is heat flow density；
Δ X spacing between test point.
And the calculation method about insulating mold coating equivalent thermal resistance for building:
It is according to Fu Li leaf law:
Q is the unit time to conduct heat；A is heat transfer base plate (partition) area；λ is thermal coefficient；For temperature gradient.
Therefore the heat transmitted in Δ t to I part of top plate can be obtained:
To the heat transmitted to II part of top plate in Δ t:
λ1、λ2The respectively thermal coefficient of top plate I part and II part, A1、A2Respectively I part of top plate and II part
Area.
Only considered when calculating when the heat of vertical direction transmitting simultaneously: and have(A is heat transfer base plate
Area/partition area)；
The thermal resistance that I part is transmitted within the Δ t time
The thermal resistance that II part is transmitted within the Δ t time
(Δ t is the test interval)
It will 3. substitute into 1.；4. 2. substituting into then has
λ1For I part equivalent heat conductivity of top plate；λ2For II part equivalent heat conductivity of top plate；
Then have:
I part of top plate: equivalent thermal resistance
Equivalent thermal resistance can be obtained
Equivalent thermal resistance can be obtained
Wherein: (the equivalent thermal resistance that thermal resistance R ' is I part of top plate) (the equivalent thermal resistance that thermal resistance R " is II part of top plate)
The then average equivalent thermal resistance of II part of top plate are as follows:
N is indicated in formula: the number of I part or II part thermal resistance, two-part thermal resistance number are identical.
Therefore each test point equivalent thermal resistance of insulating mold coating can be obtained are as follows: Re=R "j-R'i, insulating mold coating equivalent heat
Resistance are as follows:The Equivalent Thermal Conductivities of insulating mold coating:
To obtain the equivalent thermal resistance (average equivalent thermal resistance) and Equivalent Thermal Conductivities of above-mentioned architectural heat insulation coating.
In above-mentioned formula: i is i-th of I part of top plate measuring point；J is j-th of II part of top plate measuring point；I part of top plate does not apply
Coating or the coating applied are different coating from the coating (insulating mold coating for building) on top plate II.
The detection method be detection device room temperature be 25 DEG C, water content in air are as follows: complete in 60% ± 5%
At.
The area of coating to be measured and comparison coating in the present invention can adjust according to the actual situation, while will be corresponding
Parameter displacement, which enters above-mentioned formula, can calculate corresponding equivalent thermal resistance value and Equivalent Thermal Conductivities.
The present embodiment has selected three kinds of tabula rasa, insulating mold coating and reflective heat-insulation paint different coating to carry out test survey
Examination, thermocouple and current density piece be only provided with two layers of phase, thus the S in formula at this moment just for bottom plate (i.e. partition 2) and
Spacing between top plate.The case where it is detected is as shown in Fig. 3.Attached drawing 3 is that insulating mold coating equivalent thermal resistance tests table.
Then data in 3 table of attached drawing are inserted in calculation formula, so as to calculate the equivalent thermal resistance of various materials.Together
Data in Shi Congbiao can be seen that detection method of the invention has the technological merits such as quick, accurate, be completely suitable for guarantor
The detection of warm insulating moulding coating performance, to differentiate the true and false.
Equivalent thermal resistance described herein is: each test point heat radiation heat flow density equivalent of cabinet space is in the thermally conductive of space
The thermal resistance that heat flow density calculates.
Equivalent thermal resistance is: since insulating mold coating is the mechanism and effect of blocking radiant heat, applying thermal insulation coatings part and hangs down
Straight corresponding space temperature increases, and equivalent thermal resistance increases, and is equivalent to the increase of insulating mold coating thermal resistance, and equivalent speed view resistance is heat preservation
The equivalent thermal resistance of insulating moulding coating.
Equivalent heat conductivity is: equivalent thermal resistance calculates the thermal coefficient of each measuring point of cabinet space.
Equivalent Thermal Conductivities are: the thermally conductive system calculated according to the thickness gauge of insulating mold coating equivalent thermal resistance and thermal insulation coatings
Number is the thermal coefficient (virtual thermal coefficient) of insulating mold coating.
In invention unless specifically defined or limited otherwise, the arts such as term " installation ", " connected ", " connection ", " fixation "
Language shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
The above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
Limitation of the invention, protection scope of the present invention should be defined by the scope defined by the claims..For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these change
It also should be regarded as guarantor's range of the invention into retouching.
Claims (6)
1. the equivalent thermal resistance and thermal coefficient detection method of a kind of insulating mold coating for building, which is characterized in that including following
Step:
1) test coating prepares: coating coating to be measured on the area of the top plate half of test equipment, sets on the other half area
Set common plastics plate tabula rasa or comparison coating；
2) data acquire: acquiring coating to be measured by data collector under identical environment and compare the heat flow density and temperature of coating
Degree；
3) equivalent thermal resistance calculates: architectural heat insulation coating blocking radiant heat equivalent thermal resistance Re calculation formula are as follows: Re=Rj”-R'i
In formula:
R″j: the radiant heat flux density equivalent for applying vertical direction between insulating mold coating plastic plate and bottom plate is heat conduction heat flux density
Thermal resistance value；
R′i: the radiant heat flux density equivalent for being not coated with vertical direction between insulating mold coating plastic plate and bottom plate is that heat conduction heat flux is close
The thermal resistance of degree；
In formula: the spacing between two measuring points that S is the distance between each measuring point and corresponding measuring point when being the measurement temperature difference；
Temperature difference of the Δ T between test point；
Δ t is the interval time of test acquisition every time；
Q is heat flow density；
Δ X spacing between test point；
Insulating mold coating average equivalent thermal resistance for building:
The average value of the equivalent thermal resistance of 1 part of top plate
The average value of the equivalent thermal resistance of the part top plate Π
2. the equivalent thermal resistance and thermal coefficient detection method of a kind of insulating mold coating for building according to claim 1,
It is characterized in that, the temperature of tested environment is 25 DEG C, relative air humidity 60% ± 5%.
3. the equivalent thermal resistance and thermal coefficient detection method of a kind of insulating mold coating for building according to claim 1,
It is characterized in that, the top plate is plastic plate.
4. the equivalent thermal resistance and thermal coefficient detection method of a kind of insulating mold coating for building according to claim 1,
It is characterized in that, the bottom plate is plastic plate.
5. the equivalent thermal resistance and thermal coefficient detection method of a kind of insulating mold coating for building according to claim 1,
It is characterized in that, the paint thickness on the top plate is less than 0.3mm.
6. the equivalent thermal resistance and thermal coefficient detection method of a kind of insulating mold coating for building according to claim 1,
It is characterized in that, the test equipment includes heat source and incubator, partition is installed in the incubator, the partition will be kept the temperature
Case is divided into two mutually independent test chambers and heating chamber；The heat source is connected to heating chamber provides stable heat for heating chamber
Can, mounting rack is provided in the test chamber, there is two layers or two layers or more of mounting plate on the mounting rack, on the mounting plate
It is provided with data collector, the cabinet inner top of the incubator is divided into painting apply flitch to be measured and comparison painting apply flitch.
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