CN108844993A - A method of for correcting enclosure structure heat transfer coefficient on-site test result - Google Patents
A method of for correcting enclosure structure heat transfer coefficient on-site test result Download PDFInfo
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Abstract
A method of for correcting enclosure structure heat transfer coefficient on-site test result, includes the following steps, utilize the heat transfer coefficient A of the stable state thermal transport property measurement different datum plate of system detection at least two pieces of heat transfer coefficients；Utilize temperature-controlled box-heat-flow meter method scene building enclosure tester detection datum plate heat transfer coefficient B；Corrected parameter D=A/B is calculated, and obtains the relation curve or relation function of B-D；On-site test is carried out to building enclosure using temperature-controlled box-heat-flow meter method scene building enclosure tester, obtains its heat transfer coefficient C；According to C and B-D relation curve or relation function, corresponding corrected parameter D is obtained, calculates revised enclosure structure heat transfer coefficient C*D.This method, by the way that a set of datum plate is respectively adopted, stable state thermal transport property measures system and temperature-controlled box-heat-flow meter method scene building enclosure tester detects its heat transfer coefficient A and B, corrected parameter D is obtained, heat transfer coefficient C is modified, this method realizes that simple and testing result accuracy is high.
Description
Technical field
The present invention relates to a kind of building test methods, more particularly, to amendment enclosure structure heat transfer coefficient on-site test knot
The method of fruit.
Background technique
Building enclosure refers to the structures such as the wall for enclosing space surrounding.The heat transfer coefficient of building enclosure is examined
It surveys, there is laboratory testing and two kinds of on-site test.Usually associated assay devices are arranged in specific place in laboratory testing, and
It is interim to build sub-fraction wall, the wall that this temporarily builds is detected, due to needing interim masonry panel, carries out one
One month or more time is about needed (to need wall internal moisture to volatilize completely, and examined in the dry state before and after secondary measurement
Survey), it takes a long time, human cost is higher, also higher to the requirement for building place.And on-site test, refer to having been brought to completion
Whole or part thereof the wall of building carry out the detection at scene, detection environment is the Architectural Services Department of the completion.Measurement is gone along with sb. to guard him at present
The heat transfer coefficient of structure has following several method：
One, test specimen is placed between the hot tank and ice chest of known environment temperature by Heat-box method, and measurement is empty at steady state
Temperature degree and surface temperature and the power for inputting hot cell are calculated the heat transfer character of test specimen by these measurement numerical value.Heat-box method
The characteristics of be not subject to seasonal restrictions, as long as outdoor average air temperature at 25 DEG C hereinafter, relative humidity 60% hereinafter, in hot tank
Temperature, which is greater than outdoor 8 DEG C of maximum temperature or more, to test.Currently, this method is mainly as laboratory testing method, inspection
It is more accurate to survey result, but is limited in that equipment is more, is unfavorable for on-the-spot test, also there has been no for on-site test at present
Relevant criterion or on-site test instrument, therefore Heat-box method is currently limited to experimental determination and research.China, which promulgates, to be had《GB/
T13475-2008/ISO8990：The measurement calibration and protective hot box method of 1994 insulation steady state heat transfer properties》National standard, mesh
Preceding stable state thermal transport property measurement system on the market usually manufactures and designs according to the measuring method that the national standard is related to.Such as
Shown in Fig. 1, typical stable state thermal transport property measurement system generally includes refrigeration system 11, hot tank 12, evaporator 13, hot tank and leads
Stream screen 14, test specimen frame 15, ice chest flow guiding screen 16, ice chest 17 and electric heater 18, the test specimen 19 are the wall temporarily built.It is testing
Under conditions of room room temperature, humidity are controllable, in the case that stable state thermal transport property measurement system meets national standard, measurement system
System is corrected edge heat loss, and experimental error is small, and detection accuracy is higher, but it not can be carried out on-site test, and at
This is higher.
Two, heat-flow meter method is under the premise of one-dimensional steady-state heat transfer, by the heat flow density and masonry two that detect heat-flow meter
The temperature difference in face, to calculate the thermal property of masonry, core is the hot-fluid measured through measurand, and assumes that heat transfer is one
Dimension, otherwise, hot-fluid is important, and the thermal resistance of calculated measured object is less than normal, and heat transfer coefficient is with regard to bigger than normal.This method is country's detection mark
Quasi- preferred method, in the world and generally acknowledged method, but this method has a serious limitation used in on-the-spot test.Cause
It is that must be tested in Heating Period to use the precondition of this method, the reality in China is that some areas are not adopted substantially
It is warm, such as southern area, and some engineerings of heating districts limit its use in non-heating period completion etc. in this way.
Three, temperature-controlled box-heat-flow meter method, heat-flow meter method and Heat-box method are combined, the heat for passing through masonry with heat-flow meter measurement
Current density guarantees wall internal-external temperature difference with temperature-controlled box, and the thermal property of masonry is calculated according to the Computing Principle of heat-flow meter method.
As shown in Fig. 2, temperature-controlled box 2 and the sealing of metope 3 are installed, temperature-controlled box 2 is equipped with temperature sensor, heat-flow meter, heater 21 and dissipates
Hot plate 22 will be heated to required temperature inside it, then be tested position by the intracorporal temperature of temperature sensor detection case, wall
Surfaces externally and internally temperature calculate the heat transfer coefficient for obtaining measurand by heat-flow meter detection by the heat flow of wall.Its benefit
Temperature is controlled with temperature-controlled box, simulates the thermal technology state of Heating Period building, with the heat transfer coefficient of heat-flow meter method measurement measurand.
This method can be not only used for laboratory testing, it can also be used to which on-site test is current scene since the more letter of its equipment is answered portable
Detect the main method of enclosure structure heat transfer coefficient.Temperature-controlled box --- heat-flow meter method combines two kinds of sides of heat-flow meter method and Heat-box method
The characteristics of method, uses heat-flow meter method as basic detection method, while the heat of a simulation Heating Period is manually manufactured with hot tank
Work environment, had not only avoided the problem of heat-flow meter method is subject to seasonal restrictions in this way, but also did not had to the error of calibration hot tank, only because of hot tank thus
It is temperature control equipment, does not calculate the power that input hot tank and hot tank are transmitted to all directions, therefore do not have to huge protective housing
Boundary heat loss is eliminated at the scene, and without its boundary heat loss is demarcated, detection is time-consuming shorter, inspection can be completed within usual three days
It surveys.
But temperature-controlled box-heat-flow meter method equally has greater limitations.Inventor compares different manufacturers, different model and size
Temperature-controlled box-heat-flow meter method scene building enclosure tester, test, same wall body or even same position is compared, detect
As a result all there are 10~25% differences, all devices are calibrated, and by analysis, are primarily present following problems：
(1) Multidimensional Heat Transfer causes edge heat loss
During temperature-controlled box-heat-flow meter method on-site test enclosure structure heat transfer coefficient, construction site is substantially without condition
Indoor environment temperature is controlled, it is consistent or close with indoor environment temperature not to be able to maintain temperature-controlled box case body temperature, especially
It is in non-heating season section and non-heating region, there are the larger temperature difference, temperature-controlled box and tested walls to exist for temperature-controlled box and detection environment
Multidimensional Heat Transfer, testing result error are larger.
Inventor is according to national standard below《GB/T10294-2008/ISO8302：1991 Technology of Steady State Thermal Resistance of Thermal Insulating Material and
Measurement Guarded hot plate in relation to characteristic》2.4.5 clause：Edge heat loss, to assess temperature-controlled box-heat-flow meter method heat loss
Situation.Concrete scheme is as follows：
(right view that Fig. 3 is temperature control box 2 in Fig. 2) as shown in Figures 2 and 3 builds test wall (by interior in laboratory
To external structure：20mm cement mortar+200mm autoclaved aerated building block+20mm cement mortar, 1.6 × 1.6m of size), in test wall
It is punched on body, depth is 1/2 thickness of wall body, and position is temperature-controlled box up and down at the center (a, b, c, d) at four edges, insertion
Sheet metal, cement mortar sealing；Using temperature-controlled box-heat-flow meter method scene building enclosure tester, (1.2 × 1.2m cabinet is advised
Lattice, by calibration) test wall heat transfer coefficient is detected as 1.38W/ (m2K)；20 ± 1 DEG C of laboratory temperature of control, humidity 75
Under the conditions of ± 5RH%, inside control temperature-controlled box and the temperature difference △ T of the wall other side is greater than 10 DEG C, after two sides temperature is stablized (from
Detected within 72 hours after on-test) test a, b, c, d, e, f temperature, every four hours thermometrics are primary, be averaged, according to
Lower formula calculates deviation：(Te-Tm)/△ T, wherein：
Te be temperature control box body up and down at the center at four edges a, b, c, d temperature；
Tm is the two sides mean temperature in wall center at temperature control Bin covering, Tm=(e+f)/2；
△ T is the two sides temperature gap in wall center at temperature control Bin covering, △ T=(e-f).
Testing result is as follows：
Table 1
According to《GBT 10294-2008ISO8302：1991 Technology of Steady State Thermal Resistance of Thermal Insulating Material and measurement protective hot in relation to characteristic
Plate method》The edge 2.4.5 heat loss regulation, deviation be not more than 0.1, when obtaining full accuracy, this value should be less than 0.02.It is above-mentioned
The temperature-controlled box obtained in experiment-heat-flow meter method detection enclosure structure heat transfer coefficient deviation average is 0.45, much larger than defined
0.1, therefore, temperature-controlled box-heat-flow meter method building enclosure tester temperature control box is easy to cause and measures there are larger edge heat loss
Enclosure structure heat transfer coefficient error it is larger.
(2) temperature-controlled box itself heat loss
In the ideal case, when designing and manufacturing temperature-controlled box, it is smaller to control its heat transfer coefficient as far as possible, to reduce itself
Heat loss, but in a practical situation, temperature control box body itself still has many heat loss, if the heat transfer system of temperature-controlled box itself
Number is larger, for example, its heat transfer coefficient reach with similar in surveyed enclosure structure heat transfer coefficient in situation, then can be to testing result meeting
It produces a very large impact.In above-mentioned test, when detecting edge heat loss, synchronous detection masonry wall structure heat transfer coefficient, is examined
Survey result is 1.38W/ (m2·K).In addition, by cabinet holding and metope sealing state, then by heat-flow meter and temperature sensor
Outside in temperature-controlled box is pasted, identical temperature and humidity environmental condition is kept, enables temperature control box body temperature difference be greater than 10 DEG C, detection
The heat transfer coefficient of temperature control box body, testing result are 1.19W/ (m2·K).Know that the heat transfer coefficient of temperature control box body is higher, very
It is extremely close with the heat transfer coefficient of tested building enclosure, cause temperature control box heat loss itself larger, is easy to cause temperature-controlled box-heat-flow meter
It is larger that method building enclosure tester measures enclosure structure heat transfer coefficient error.
From the point of view of above-mentioned analysis result, with temperature-controlled box --- heat-flow meter method on-site test enclosure structure heat transfer coefficient, it will
Due to the heat loss of Multidimensional Heat Transfer and temperature control box itself between temperature control box and building enclosure, cause testing result accuracy compared with
It is low.The detection device of heat-flow meter method --- (i.e. temperature-controlled box --- the heat-flow meter method scene building enclosure that do not changing existing temperature-controlled box
Tester) and the testing conditions at scene in the case where, above-mentioned deviation will be unable to be improved, and to detection device and inspection
Survey condition is changed, and the cost of required investment will not be low, therefore how under existing detection device and testing conditions, is obtained
Accurate on-site test enclosure structure heat transfer coefficient, becomes insoluble technical problem.
Summary of the invention
It is an object of the present invention to provide a kind of method for correcting enclosure structure heat transfer coefficient on-site test result,
At least one of to solve the above problems.According to an aspect of the invention, there is provided a kind of for correcting building enclosure biography
The method of hot coefficient on-site test result, includes the following steps,
Utilize the heat transfer coefficient of the stable state thermal transport property measurement different datum plate of system detection at least two pieces of heat transfer coefficients
A；
Utilize temperature-controlled box-heat-flow meter method scene building enclosure tester detection datum plate heat transfer coefficient B；
Corrected parameter D=A/B is calculated, and obtains the relation curve or relation function of B-D；
On-site test is carried out to building enclosure using temperature-controlled box-heat-flow meter method scene building enclosure tester, obtains its biography
Hot coefficient C；
According to C and B-D relation curve or relation function, corresponding corrected parameter D is obtained, calculating is revised to go along with sb. to guard him knot
Structure heat transfer coefficient C*D.
Method for correcting enclosure structure heat transfer coefficient on-site test result of the invention, by a set of datum plate point
Not Cai Yong stable state thermal transport property measurement system and temperature-controlled box-heat-flow meter method scene building enclosure tester detect its heat transfer system
Number A and B obtains being able to reflect stable state thermal transport property measurement system and temperature-controlled box-heat-flow meter method scene building enclosure test
The proportionality coefficient A/B of both instrument testing result difference, and using this its as corrected parameter D, existing using temperature-controlled box-heat-flow meter method
After building enclosure tester on-site test building enclosure obtains its heat transfer coefficient C, according to corrected parameter D to heat transfer coefficient C into
Row amendment, the purpose is to obtain a correction result C*D, correction result C*D, which is approached, directly to be surveyed with stable state thermal transport property
Determine system building enclosure is carried out to detect testing result obtained.This method realizes that simple and testing result accuracy is high.
In some embodiments, every piece of datum plate is made of identical material, and thickness is different, makes it have different biographies
Hot coefficient.The datum plate of this scheme can cover biggish heat transfer coefficient range, improve the scope of application of testing result.
In some embodiments, the thickness of every piece of datum plate is identical, is made of different materials, makes it have different
Heat transfer coefficient.The datum plate of this scheme can cover biggish heat transfer coefficient range, improve the scope of application of testing result.
In some embodiments, the thickness of every piece of datum plate is different, is made, is made it have different of different materials
Heat transfer coefficient.The datum plate of this scheme can cover biggish heat transfer coefficient range, improve the scope of application of testing result.
In some embodiments, datum plate is foamed polystyrene board, expansion polyphenyl plate, extruded polystyrene board, mineral wool
Plate, rock wool board, rubber and plastic boards, calcium silicate board, silicate aluminum board, silicate board, ceramic thermal insulation plate, pearlite slab, phenolic resin are compound
One of plate, Rigid foam polyurethane, steam pressure sand aerated concrete plate are a variety of.The datum plate of this scheme is homogeneous, stablizes, energy
Enough improve the accuracy of testing result.
In some embodiments, datum plate is equipped with bearing part, and bearing part undertakes datum plate own wt.By
This, can prevent from guaranteeing uniformity because of effect of weight datum plate density, in order to avoid influence testing result.
In some embodiments, datum plate is surrounded by bound edge, and bound edge is made of adiabatic elasticity material.As a result,
The pressure to datum plate can be reduced, reduction leads to basic plate variable density because of pressure, and it is homogeneous to sexually revise, and influence detection knot
A possibility that fruit.
In some embodiments, when detecting using stable state thermal transport property measurement system to datum plate, base is controlled
Quasi- plate temperature difference is 8 DEG C or more.Detection data can be made more acurrate as a result,.
In some embodiments, it when being detected using temperature-controlled box-heat-flow meter method scene building enclosure tester, is enclosing
After the temperature of protection structure two sides, hot-fluid reach balance, at least 24 hour datas are chosen to calculate acquisition heat transfer coefficient.As a result, may be used
Improve the accuracy of testing result.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that stable state thermal transport property measures system in the prior art；
Fig. 2 uses schematic diagram for temperature-controlled box in the prior art；
Fig. 3 is the right view of the temperature-controlled box in Fig. 2；
Fig. 4 is the stream of the method for correcting enclosure structure heat transfer coefficient on-site test result of an embodiment of the present invention
Cheng Tu；
Fig. 5 is the cross-sectional view of the datum plate of an embodiment of the present invention；
Fig. 6 is the side view of the datum plate of an embodiment of the present invention；
Fig. 7 is the B-D graph of relation of an embodiment of the present invention；
Fig. 8 is the B-D graph of relation of another embodiment of the present invention.
Specific embodiment
The invention will now be described in further detail with reference to the accompanying drawings.
The present invention provides a kind of method for correcting enclosure structure heat transfer coefficient on-site test result, referring to Fig. 4, packet
Include following steps：
S1：Utilize the heat transfer system of the stable state thermal transport property measurement different datum plate of system detection at least two pieces of heat transfer coefficients
Number A.
A set of datum plate may include two to ten pieces or more different datum plate of heat transfer coefficient, use is homogeneous, high density,
The material of low heat transfer coefficient is made, such as foamed polystyrene board, expansion polyphenyl plate, extruded polystyrene board, block of glass wool, rock wool
Plate, rubber and plastic boards, calcium silicate board, silicate aluminum board, silicate board, ceramic thermal insulation plate, pearlite slab, composite phenolic resin board, poly- ammonia
Ester composite plate, steam pressure sand aerated concrete plate it is one or more.The heat transfer coefficient of every piece of datum plate is different, to simulate difference
Detection case under heat transfer coefficient.The heat transfer coefficient difference of datum plate has several ways realization：It is identical to can be material, thickness is not
Together or material is different (using the material of different heat transfer coefficient), and thickness is identical, is also possible to material and is all different with thickness.
The thickness of datum plate can be 2cm-20cm etc..In order to improve the accuracy of testing result, the present embodiment is homogeneous using three pieces
Foamed polystyrene board, density 20kg/m3, thickness is respectively 12cm, 8cm, 4cm, and size is according to stable state heat transmitting
The equipment of matter measurement system is accordingly arranged, and the length L of datum plate is 1.6m in the present embodiment, and area is 1.6m × 1.6m=
2.56m2.As shown in fig. 6, the datum plate 4 is specially square plate, it can be equipped with support member 41, prevented because of effect of weight benchmark
Plate density guarantees uniformity, in order to avoid influence testing result.As it can be seen in figures 5 and 6, datum plate is surrounded by bound edge 42, bound edge
Width b1 is generally greater than benchmark plate thickness b2.The bound edge is made of adiabatic elasticity material, such as adiabatic cotton.The thickness of the bound edge
It spends b and is slightly larger than gap size between datum plate and detection device, the gap filling is full, it reduces because datum plate is set with detection
Gap between standby and generate detection error, meanwhile, the insulation bound edge material that elasticity is good good using compressibility such as adiabatic cottons can
The pressure to datum plate is greatly reduced, reduction leads to basic plate variable density because of pressure, and it is homogeneous to sexually revise, and influence detection
As a result a possibility that.
Datum plate is detected using stable state thermal transport property measurement system general on the market.It is preferred that in laboratory
Under conditions of interior temperature, humidity are controllable, according to national standard《GB/T13475-2008/ISO8990：1994 insulation steady state heat transfer properties
Measurement calibration and protective hot box method》Specified in process and method detected.Detection process is as follows：
Controlling laboratory temperature is 20 ± 1 DEG C, 75 ± 5RH% of humidity；Datum plate is mounted on stable state thermal transport property to survey
Determine in the test specimen frame of system, heat transfer coefficient testing machine and test specimen are buckled well；Power supply is connected, testing machine is opened, temperature, test specimen are set
Area, is stablized the time metering area, every ginseng such as acquisition time interval, ice chest temperature, batch meter temperature and protective housing temperature
Number, starts to test, and control test specimen temperature difference is 8 DEG C or more, in the present embodiment, ice chest temperature is preferably set as about 0 DEG C, metering
Case and protective housing temperature are set as about 40 DEG C, and test specimen temperature difference is controlled at 40 ± 1 DEG C, heating season situation is simulated, makes to detect
Data are closer to actual conditions；Computer calculates the heat transfer coefficient A for obtaining each datum plate according to the parameter measured.
S2：Utilize temperature-controlled box-heat-flow meter method scene building enclosure tester detection datum plate heat transfer coefficient B.
For easy to detect and result accuracy, it is proposed that carry out the detection of this step in laboratory, it is preferable that adopt
With laboratory environment identical with S1, controlling laboratory temperature is 20 ± 1 DEG C, 75 ± 5RH% of humidity.Using general on the market
Temperature-controlled box-heat-flow meter method scene building enclosure tester (using 1.2 × 1.2m cabinet specification) is detected, and tester is sealed
It is mounted on the side of datum plate, required temperature will be heated to by the heater in tester inside temperature-controlled box, then pass through survey
Try the surfaces externally and internally temperature that the temperature sensor detection wall on instrument is tested position, the hot-fluid that wall is passed through by heat-flow meter detection
Amount, detection time are not less than 100 hours, choose last 24 hour data and are computed the heat transfer coefficient for respectively obtaining each datum plate
B.In addition, in the case where changes in environmental conditions is little, S1 and S2 can not also be carried out in the lab, without to environment temperature
Or humidity is controlled, as long as being carried out in the place that can satisfy test request.
S3：Corrected parameter D=A/B is calculated, and obtains the relation curve or relation function of B-D.
The testing result obtained in above-mentioned steps is as shown in the table：
Table 2
According to the data of table 2, using B as X-axis, using D as Y-axis, the relation curve of B-D is drawn, as shown in Figure 7 and Figure 8,
In, Fig. 7 is the relation curve for obtaining the connection of scatterplot straight line, and Fig. 8 is the relationship song for forming the smooth curve matching of scatterplot
Line, approximating method can be using least square curve fitting methods etc., the optional one of the above method, obtain in Fig. 7 or Fig. 8
Relation curve can also be indicated with function, be not limited to curve to be drawn out.
S4：On-site test is carried out to building enclosure using temperature-controlled box-heat-flow meter method scene building enclosure tester, obtains it
Heat transfer coefficient C.
It is 20mm cement mortar+200mm autoclaved aerated building block+20mm cement to structure from inside to outside at building scene
Mortar, the wall of 1.6 × 1.6m of size, general temperature-controlled box-heat-flow meter method scene building enclosure tester (is adopted on the market for use
With 1.2 × 1.2m cabinet specification) it is detected, tester is sealingly mounted to the side of wall, passes through the heating in tester
Device will be heated to required temperature inside temperature-controlled box, then detect wall by the temperature sensor on tester and be tested in position
The parameters such as hull-skin temperature, by heat-flow meter detection by parameters such as the heat flows of wall, temperature, heat in building enclosure two sides
It after stream reaches balance, chooses at least 24 hour datas and calculates acquisition heat transfer coefficient, in the present embodiment, preferably detection time is not
Lower than 100 hours, chooses last 24 hour data and be computed the heat transfer coefficient C for respectively obtaining wall.
S5：According to C and B-D relation curve or relation function, corresponding corrected parameter D is obtained, calculates revised enclose
Protection structure heat transfer coefficient C*D.
It finds and repairs accordingly according to the B-D relation curve in Fig. 7 and Fig. 8 according to the heat transfer coefficient C that scene measures in S4
Positive parameter D, calculates revised enclosure structure heat transfer coefficient C*D.
In the present embodiment, it is 1.46W/ (m that inventor scene in S4, which measures wall heat transfer coefficient C,2K), according to Fig. 7
Checking in corresponding correction factor D is 0.89, calculates C*D ≈ 1.30W/ (m2K), then the heat transfer coefficient of revised wall is
1.30W/(m2·K)。
In order to be compared, inventor measures system using stable state thermal transport property, builds and above-mentioned tested wall body structure
Identical wall (structure from inside to outside：20mm cement mortar+200mm autoclaved aerated building block+20mm cement mortar, size 1.6 ×
1.6m), under identical laboratory condition (20 ± 1 DEG C of temperature, 75 ± 5RH% of humidity), according to national standard《GB/T13475-
2008/ISO8990：The measurement calibration and protective hot box method of 1994 insulation steady state heat transfer properties》, wall heat transfer coefficient is examined
It surveys, measuring wall heat transfer coefficient is 1.28W/ (m2·K).Laboratory testing is carried out with system is measured by stable state thermal transport property
Result 1.28W/ (the m of acquisition2K) compare, the present embodiment be corrected after result 1.30W/ (m2K it) is closer to it,
1.6% (calculation formula is (1.30-1.28)/1.28 ≈ 1.6%) is differed only by, illustrates the accuracy of the heat transfer coefficient after being corrected
It is higher.And relative to the unmodified result 1.46W/ only measured with temperature-controlled box-heat-flow meter method scene building enclosure tester
(m2K it) compares, differing 12.3% before amendment with revised heat transfer coefficient, (calculation formula is (1.46-1.30)/1.30 ≈
12.3%), it can be seen that temperature-controlled box-heat-flow meter method on-site test result is effectively corrected in the present embodiment.
Method for correcting enclosure structure heat transfer coefficient on-site test result of the invention, by a set of datum plate point
Not Cai Yong stable state thermal transport property measurement system and temperature-controlled box-heat-flow meter method scene building enclosure tester detect its heat transfer system
Number A and B obtains being able to reflect stable state thermal transport property measurement system and temperature-controlled box-heat-flow meter method scene building enclosure test
The proportionality coefficient A/B of both instrument testing result difference, and using this its as corrected parameter D, existing using temperature-controlled box-heat-flow meter method
After building enclosure tester on-site test building enclosure obtains its heat transfer coefficient C, according to corrected parameter D to heat transfer coefficient C into
Row amendment, the purpose is to obtain a correction result C*D, correction result C*D, which is approached, directly to be surveyed with stable state thermal transport property
Determine system building enclosure is carried out to detect testing result obtained.
Method of the invention, has the following technical effects：First, it avoids and directlys adopt stable state thermal transport property measurement system
System is detected the huge time to be expended, human and material resources cost to building enclosure, but is directly carried out to a set of datum plate
Detection, the datum plate is easily fabricated, easy to detect, without needing to build a wall as detection building enclosure, save the plenty of time with
Other costs；Second, the heat transfer coefficient C that on-site test obtains is modified, temperature-controlled box-heat-flow meter method scene can be gone along with sb. to guard him
The deviations such as inevitable Multidimensional Heat Transfer and heat loss are modified when structural test machines detection, while without setting to existing detection
Standby or detection method makes any change；Third tests each or every money temperature-controlled box-heat-flow meter method scene building enclosure
Instrument, need to only carry out a test (step S1-3) acquisition B-D relation curve or relation function, can be to different building enclosures
It is modified in test using the relation curve or relation function, i.e., on-site test is carried out to building enclosure every time and finished, only needed
Control B-D relation curve is modified calculating, very easy (to be required to routine tests to then each tester, still
It only need to once be tested with a tester, can be depending on the concrete condition of the individual difference of tester, which refers to
Difference on its material or structure leads to the difference of the deviations such as Multidimensional Heat Transfer and heat loss).
Above-described is only some embodiments of the present invention.For those of ordinary skill in the art, not
Under the premise of being detached from the invention design, various modifications and improvements can be made, or carries out freely to above-mentioned technical proposal
Combination, these are all within the scope of protection of the present invention.
Claims (9)
1. a kind of method for correcting enclosure structure heat transfer coefficient on-site test result, it is characterised in that：Include the following steps,
Utilize the heat transfer coefficient A of the stable state thermal transport property measurement different datum plate of system detection at least two pieces of heat transfer coefficients；
The heat transfer coefficient B of the datum plate is detected using temperature-controlled box-heat-flow meter method scene building enclosure tester；
Corrected parameter D=A/B is calculated, and obtains the relation curve or relation function of B-D；
On-site test is carried out to building enclosure using temperature-controlled box-heat-flow meter method scene building enclosure tester, obtains its heat transfer system
Number C；
According to C and B-D relation curve or relation function, corresponding corrected parameter D is obtained, revised building enclosure is calculated and passes
Hot coefficient C*D.
2. the method according to claim 1 for correcting enclosure structure heat transfer coefficient on-site test result, feature exist
In：Every piece of datum plate is made of identical material, and thickness is different, makes it have different heat transfer coefficients.
3. the method according to claim 1 for correcting enclosure structure heat transfer coefficient on-site test result, feature exist
In：The thickness of every piece of datum plate is identical, is made of different materials, makes it have different heat transfer coefficients.
4. the method according to claim 1 for correcting enclosure structure heat transfer coefficient on-site test result, feature exist
In：The thickness of every piece of datum plate is different, is made of different materials, makes it have different heat transfer coefficients.
5. the method according to claim 1 for correcting enclosure structure heat transfer coefficient on-site test result, feature exist
In：The datum plate is foamed polystyrene board, expansion polyphenyl plate, extruded polystyrene board, block of glass wool, rock wool board, rubber and plastic boards, silicon
Sour calcium plate, silicate aluminum board, silicate board, ceramic thermal insulation plate, pearlite slab, composite phenolic resin board, Rigid foam polyurethane, steam pressure
One of sand aerated concrete plate is a variety of.
6. the method according to claim 1 for correcting enclosure structure heat transfer coefficient on-site test result, feature exist
In：The datum plate is equipped with bearing part, and the bearing part undertakes the datum plate own wt.
7. the method according to claim 1 for correcting enclosure structure heat transfer coefficient on-site test result, feature exist
In：The datum plate is surrounded by bound edge, and the bound edge is made of adiabatic elasticity material.
8. according to any one of claim 1 to 7 for correcting the side of enclosure structure heat transfer coefficient on-site test result
Method, it is characterised in that：When detecting using stable state thermal transport property measurement system to datum plate, datum plate temperature difference is controlled
It is 8 DEG C or more.
9. according to any one of claim 1 to 7 for correcting the side of enclosure structure heat transfer coefficient on-site test result
Method, it is characterised in that：When being detected using temperature-controlled box-heat-flow meter method scene building enclosure tester, in building enclosure two sides
Temperature, after hot-fluid reaches balance, choose at least 24 hour datas to calculate acquisition heat transfer coefficient.
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Application publication date: 20181120 |