CN1721845A - Building exterior-protected construction heat transfer coefficient on-site detecting method - Google Patents
Building exterior-protected construction heat transfer coefficient on-site detecting method Download PDFInfo
- Publication number
- CN1721845A CN1721845A CNA2004100263431A CN200410026343A CN1721845A CN 1721845 A CN1721845 A CN 1721845A CN A2004100263431 A CNA2004100263431 A CN A2004100263431A CN 200410026343 A CN200410026343 A CN 200410026343A CN 1721845 A CN1721845 A CN 1721845A
- Authority
- CN
- China
- Prior art keywords
- temperature
- heat flow
- flow meter
- heat transfer
- temperature sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K17/00—Measuring quantity of heat
- G01K17/06—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device
- G01K17/08—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device based upon measurement of temperature difference or of a temperature
- G01K17/20—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device based upon measurement of temperature difference or of a temperature across a radiating surface, combined with ascertainment of the heat transmission coefficient
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention relates to an architecture exterior-protected construction heat transfer rate on-site detection method which comprises: attaching heat flow meter and temperature sensor, connecting heat flow meter, temperature sensor and temperature heat flow automatic patrol testing equipment by transmission line, attaching automatic temperature-controller with the inner wall which has heat flow meter and temperature sensor, adjusting automatic temperature-controller, automatically reading storage measuring value, computing architecture exterior-protected construction heat transfer rate. It uses differential temperature measured by temperature sensor and electromotance E outputted by heat flow meter to reflect heat flow density. It uses formula to compute heat transfer rate K.
Description
Technical field
The present invention relates to the detection method of buildings exterior-protected structure, especially buildings exterior-protected structure heat transfer coefficient in-situ check and test method.
Background technology
At present, China is in the period of great prosperity of construction industry development.1990-2002, the average annual growth rate of floor area of building of annual construction of China and completion is up to 155%.Along with increasing rapidly of floor area of building, people require constantly to improve to the comfort level of indoor environment.Winter, room temperature was brought up to 18 ℃-20 ℃ by 12 ℃-16 ℃; Summer, room temperature then was reduced to 22 ℃-20 ℃ by 30 ℃.It is estimated that the building energy consumption account of China society total energy consumption proportion surpasses 25% in recent years, the heating energy consumption of northern area surpasses 40% of local social total energy consumption.The greenhouse gas emissions that architectural energy consumption produces have surpassed 1/4 of national total flow rate.The immense pressure of aspects such as the energy that architectural energy consumption causes, environmental protection has caused that the Chinese government pays much attention to, and has formulated a series of buildingss and the energy-conservation standard of Architectural Equipment, with its important performance assessment criteria as the market access.Calendar year 2001, China put into effect energy-conservation field test standard " heating Residential Buildings Energy standard " (JGJ132-2001), the different regions building enclosure has been formulated heat transfer coefficient, for finally the checking on of building energy conservation work provides science, quantitative judgment basis, make more scientific, the standardization of this work., this standard working specification in the process of implementation has certain limitation, 4.47 regulations of standard " ... detection should be carried out after the normal operation of heating system ... the detection duration should not be less than 96 hours ".But actual conditions are, most construction works were completed in summer and autumn, if detect after all waiting until winter heating, the time concentrates around here, and workload is concentrated, and will inevitably bring difficulty to testing; In addition, because the restriction in season also can affect for the final acceptance of construction of engineering.
Summary of the invention
In view of the foregoing, the present invention aims to provide a kind of buildings exterior-protected structure heat transfer coefficient in-situ check and test method.This method detection method in accordance with regulations---heat flow meter method is utilized temperature automatically controlled constant temperature oven, is to cause to carry out under the environment of the temperature difference that the buildings exterior-protected structure heat transfer coefficient is on-the-spot to be detected the people, is not subjected to the restriction of time, overcomes the phenomenon of heating phase centralized detecting.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of buildings exterior-protected structure heat transfer coefficient in-situ check and test method is the inside surface that heat flow meter is sticked on tested body of wall, and should contacts fully with inside surface; Temperature sensor is near heat flow meter, and the hull-skin temperature sensor sticks on the corresponding position of heat flow meter, and is evenly distributed; Adopt multiplex transmission line that heat flow meter, temperature sensor are connected with the automatic scan tester of temperature hot-fluid; Again temperature automatically controlled constant temperature oven is close to the metope that is furnished with heat flow meter, temperature sensor; Regulate temperature automatically controlled constant temperature oven, make the certain temperature difference of the inside and outside generation of tested district metope and temperature is tended towards stability; Automatically read the storage measured value, when certain hot-fluid vertical current superheat flow measuring head, produce certain electromotive force E, (C is the gauge head coefficient by formula q=CE, after gauge head is made, definite constant exactly) just can determine to flow through the heat flow density q of heat flow meter; The automatic scan tester of temperature hot-fluid writes down electromotive force E and j measured value Q of building enclosure surfaces externally and internally temperature control of heat flow meter automatically
I1Q
I2Q
I3Q
I4Q
I5Q
E1Q
E2Q
E3Q
E4Q
E5Data processing is with tested j Q
Ij, Q
Ej, q value substitution following formula:
Thermal resistance (the m of R in the formula---building enclosure
2K/W)
Q
Ij---the j time measured value of building enclosure internal surface temperature (℃)
Q
Ej---the j time measured value of building enclosure hull-skin temperature (℃)
q
j---the j time measured value (W/m of heat flow density
2)
Can calculate the thermal resistance R of building enclosure, again with R substitution K=1/ (R
i+ R+R
e)
In the formula: K---the heat transfer coefficient (W/m of building enclosure
2.k)
R
i---heat exchange resistance of interior surface, by national standard " code for thermal design of civil buildings "
GB50176 stipulates to adopt
R
e---outside surface heat exchange resistance, by national standard " code for thermal design of civil buildings "
GB50176 stipulates to adopt
Then the Coefficient K of building enclosure just can be obtained.
The beneficial effect of advantage of the present invention and generation is:
1, the present invention avoids concentrated owing to the time of detecting at heating period, workload is concentrated, brings difficulty to testing.Using temperature automatically controlled constant temperature oven, is to cause under the environment of the temperature difference the people, carries out the scene of buildings exterior-protected structure heat transfer coefficient and detects, and it is stable that the value of heat transfer coefficient reaches quickly, and restricted factor is few;
2, chart as can be seen, under the artificial temperature control condition, the value of heat transfer coefficient is easier to reach stable, sense cycle can suitably shorten, and does not influence the examination of completion of works, can reduce labour intensity, improves plant factor.
The on-the-spot concrete detection method of the present invention is provided by drawings and Examples
Description of drawings
Fig. 1 is a pick-up unit synoptic diagram of the present invention
Fig. 2 is heat transfer coefficient-time plot under the artificially controlling temperature condition of the present invention
Fig. 3 is indoor and outdoor temperature-time plot under the artificially controlling temperature condition of the present invention
Fig. 4 is heat transfer coefficient-time plot under the heating condition
Fig. 5 is indoor and outdoor temperature-time plot under the heating condition
Embodiment
Thermal resistance (the m of R in the formula---building enclosure
2K/W)
Q
Ij---the j time measured value of building enclosure internal surface temperature (℃)
Q
Ej---the j time measured value of building enclosure hull-skin temperature (℃)
q
j---the j time measured value (W/m of heat flow density
2)
Again with R substitution K=1/ (R
i+ R+R
e)
In the formula: K---the heat transfer coefficient (W/m of building enclosure
2.k)
R
i---heat exchange resistance of interior surface, stipulate to adopt by national standard " code for thermal design of civil buildings " GB50176
R
e---outside surface heat exchange resistance, stipulate to adopt by national standard " code for thermal design of civil buildings " GB50176
Then the Coefficient K of building enclosure just can be obtained.
Embodiment 2 the present invention contrast in the detection and the heating phase conventional sense of non-heating period to a certain room heat transfer coefficient of outer wall.
Method of operating is as embodiment 1.
Detect and divide artificially controlling temperature to detect and the detection of heating phase
1, artificially controlling temperature detects
The present invention adopts opening 1 * 1m
2Temperature automatically controlled constant temperature oven 2 (heating), testing result with Fig. 2,
The statement of Fig. 3 curve map form.
Transverse axis is the continuity of detection time, and each digit is 0.5h, and the longitudinal axis is represented heat transfer coefficient (W/m
2.K.)。By curve as can be seen, the value of heat transfer coefficient is more stable, and reaches stable faster, begins to stablize near the 30th, and promptly the 15th h begins to stablize.By calculating, the mean value of heat transfer coefficient is K=1.47W/ (m when stablizing
2.K).From Fig. 3 temperature-time plot as can be seen, indoor artificial control temperature curve 1 and outdoor natural temperature curve 2 tend towards stability very soon through 30h.
2, the heating phase is detected
Testing result is represented with Fig. 4 heat transfer coefficient-time curve and Fig. 5 temperature-time curve.
As can be seen from Figure 4, heat transfer coefficient continues the variation of generating period in time, and fluctuation is very big; As can be seen from Figure 5, heating indoor temperature curve ratio is more steady, outdoor natural temperature curve
2 fluctuation ratios are bigger.
The value that adopts the method for average to calculate heat transfer coefficient is K=1.54W/ (m
2K).
Guarantee the reliability of data, need the mutual checking in several cycles, so detection time generally need be very long.Detect minimum needs 96 hours by the JGJ132-2001 standard code, promptly need to write down 192 groups of data.
Hence one can see that, and artificially controlling temperature detects can substitute the detection of heating phase fully, and its advantage with self has remedied the deficiency of heating phase detection.
Claims (1)
1, a kind of buildings exterior-protected structure heat transfer coefficient in-situ check and test method is heat flow meter (3) to be sticked on the inside surface of tested body of wall (1), and should contacts fully with inside surface; Temperature sensor (4) is near heat flow meter (3), and hull-skin temperature sensor (4) sticks on the corresponding position of heat flow meter (1), and is evenly distributed; Adopt multiplex transmission line (5) that heat flow meter (3), temperature sensor (4) are connected with the automatic scan tester of temperature hot-fluid (6); It is characterized in that: temperature automatically controlled constant temperature oven (2) is close to the metope that is furnished with heat flow meter (3), temperature sensor (4); Regulate temperature automatically controlled constant temperature oven (2), make that tested district metope is inside and outside to be produced certain temperature difference and tend towards stability; When certain hot-fluid vertical current superheat flow measuring head, produce certain electromotive force E, just can determine to flow through the heat flow density of heat flow meter (3) by formula q=CE (C is the gauge head coefficient, after gauge head is made, definite constant exactly); The automatic scan tester of temperature hot-fluid (6) writes down j measured value Q of building enclosure surfaces externally and internally temperature control automatically
IjQ
EjWith thermopower E, data processing is with measured value Q
Ij, Q
Ej, q substitution following formula:
Thermal resistance (the m of R in the formula---building enclosure
2.K/W)
Q
Ij---the j time measured value of building enclosure internal surface temperature (℃)
Q
Ej---the j time measured value of building enclosure hull-skin temperature (℃)
q
j---the j time measured value (W/m of heat flow density
2)
Again with R substitution K=1/ (R
i+ R+R
e)
In the formula: K---the heat transfer coefficient (W/m of building enclosure
2.k)
R
i---heat exchange resistance of interior surface, stipulate to adopt by national standard " code for thermal design of civil buildings " GB50176
R
e---outside surface heat exchange resistance, stipulate to adopt by national standard " code for thermal design of civil buildings " GB50176
By calculating, then the Coefficient K of building enclosure just can be obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNA2004100263431A CN1721845A (en) | 2004-07-16 | 2004-07-16 | Building exterior-protected construction heat transfer coefficient on-site detecting method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNA2004100263431A CN1721845A (en) | 2004-07-16 | 2004-07-16 | Building exterior-protected construction heat transfer coefficient on-site detecting method |
Publications (1)
Publication Number | Publication Date |
---|---|
CN1721845A true CN1721845A (en) | 2006-01-18 |
Family
ID=35912313
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNA2004100263431A Pending CN1721845A (en) | 2004-07-16 | 2004-07-16 | Building exterior-protected construction heat transfer coefficient on-site detecting method |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN1721845A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101078699B (en) * | 2007-06-26 | 2010-05-26 | 东南大学 | Detection method for protecting integral heat-insulation property of structure |
CN101078698B (en) * | 2007-06-26 | 2010-09-01 | 东南大学 | Positive type detection method for protecting integral heat-insulation property of structure |
CN101246137B (en) * | 2008-01-29 | 2011-04-20 | 西北民族大学 | Method for detecting heat transfer resistance/heat transfer factor of building enclosure structure by infrared thermal imaging system |
CN101476754B (en) * | 2008-12-31 | 2011-06-15 | 孝感学院 | Construction thermal environment and construction energy-saving control method in air-conditioning construction |
CN102706543A (en) * | 2011-01-06 | 2012-10-03 | 大连理工大学 | Power tool rest comprehensive performance test method |
CN102759543A (en) * | 2012-06-26 | 2012-10-31 | 中国建筑科学研究院 | Building wall apparent heat transfer coefficient field detection method suitable for hot-in-summer and warm-in-winter areas |
CN103091361A (en) * | 2013-01-16 | 2013-05-08 | 重庆大学 | Ice chest device for field test of heat transfer coefficient with building envelope structure |
CN103336025A (en) * | 2013-07-11 | 2013-10-02 | 山东省计算中心 | Method for rapidly detecting thermal resistance of building enclosure based on time window sliding |
WO2015003291A1 (en) * | 2013-07-11 | 2015-01-15 | 山东省计算中心 | Wireless networking-based one-time rapid detection and evaluation method for building heat consumption of building group |
GB2536702A (en) * | 2015-03-26 | 2016-09-28 | Senico Ltd | Determining the U-value of a wall or other construction element |
CN109187626A (en) * | 2018-07-11 | 2019-01-11 | 中国矿业大学 | A kind of method and test device of two sides thermal characteristic of wall contrast test |
CN110118799A (en) * | 2019-05-17 | 2019-08-13 | 北京市建设工程质量第二检测所有限公司 | A kind of building energy conservation in-situ check and test method |
CN113533423A (en) * | 2021-07-21 | 2021-10-22 | 中国建筑第八工程局有限公司 | Engineering field detection method and system for wall heat transfer coefficient under non-constant temperature condition |
-
2004
- 2004-07-16 CN CNA2004100263431A patent/CN1721845A/en active Pending
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101078698B (en) * | 2007-06-26 | 2010-09-01 | 东南大学 | Positive type detection method for protecting integral heat-insulation property of structure |
CN101078699B (en) * | 2007-06-26 | 2010-05-26 | 东南大学 | Detection method for protecting integral heat-insulation property of structure |
CN101246137B (en) * | 2008-01-29 | 2011-04-20 | 西北民族大学 | Method for detecting heat transfer resistance/heat transfer factor of building enclosure structure by infrared thermal imaging system |
CN101476754B (en) * | 2008-12-31 | 2011-06-15 | 孝感学院 | Construction thermal environment and construction energy-saving control method in air-conditioning construction |
CN102706543A (en) * | 2011-01-06 | 2012-10-03 | 大连理工大学 | Power tool rest comprehensive performance test method |
CN102759543B (en) * | 2012-06-26 | 2014-09-24 | 中国建筑科学研究院 | Building wall apparent heat transfer coefficient field detection method suitable for hot-in-summer and warm-in-winter areas |
CN102759543A (en) * | 2012-06-26 | 2012-10-31 | 中国建筑科学研究院 | Building wall apparent heat transfer coefficient field detection method suitable for hot-in-summer and warm-in-winter areas |
CN103091361A (en) * | 2013-01-16 | 2013-05-08 | 重庆大学 | Ice chest device for field test of heat transfer coefficient with building envelope structure |
CN103336025A (en) * | 2013-07-11 | 2013-10-02 | 山东省计算中心 | Method for rapidly detecting thermal resistance of building enclosure based on time window sliding |
WO2015003291A1 (en) * | 2013-07-11 | 2015-01-15 | 山东省计算中心 | Wireless networking-based one-time rapid detection and evaluation method for building heat consumption of building group |
CN103336025B (en) * | 2013-07-11 | 2015-06-17 | 山东省计算中心 | Method for rapidly detecting thermal resistance of building enclosure based on time window sliding |
GB2536702A (en) * | 2015-03-26 | 2016-09-28 | Senico Ltd | Determining the U-value of a wall or other construction element |
CN109187626A (en) * | 2018-07-11 | 2019-01-11 | 中国矿业大学 | A kind of method and test device of two sides thermal characteristic of wall contrast test |
CN110118799A (en) * | 2019-05-17 | 2019-08-13 | 北京市建设工程质量第二检测所有限公司 | A kind of building energy conservation in-situ check and test method |
CN113533423A (en) * | 2021-07-21 | 2021-10-22 | 中国建筑第八工程局有限公司 | Engineering field detection method and system for wall heat transfer coefficient under non-constant temperature condition |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Fang et al. | The effect of building envelope insulation on cooling energy consumption in summer | |
CN1721845A (en) | Building exterior-protected construction heat transfer coefficient on-site detecting method | |
CN101782540B (en) | On-site detection device and detection method for heat transfer coefficients of building enclosure structures | |
CN101813651A (en) | Method for testing heat storage performance of building material and tester | |
CN103033534A (en) | Detection method for heat insulation performance of building enclosure and related device | |
CN103293013B (en) | A kind of cooling tower thermal performance appraisal procedure and system | |
CN104809555A (en) | Evaluation method for index system of heating system in severe cold region | |
CN106841289B (en) | Device and method for detecting heat insulation performance of sun-shading product by utilizing sunlight | |
CN109636677A (en) | Building thermal technique performance estimating method based on model calibration | |
CN106442609A (en) | Evaluation method for equivalent heat conductivity coefficient of solid-solid phase change thermal insulation material | |
Zukowski et al. | Assessment of the cooling potential of an earth-tube heat exchanger in residential buildings | |
Guo et al. | Experimental and numerical study on indoor thermal environment of solar Trombe walls with different air-channel thicknesses in plateau | |
CN102854214A (en) | Soil thermophysical property parameter measuring device and measuring method | |
Yu et al. | Experimental verification of state space model and thermal performance analysis for active solar walls | |
CN202133634U (en) | Detection device used for testing performance of roof heat insulation module and material | |
Cao et al. | An efficient climate index for reflecting cooling energy consumption: Cooling degree days based on wet bulb temperature | |
CN207541008U (en) | Green agriculture room energy-efficient performance detector | |
CN2828810Y (en) | Cold-heat box type heat=transfer coefficient investigating instrument | |
Janssen et al. | Hygrothermal simulation of masonry under atmospheric excitation | |
CN204789426U (en) | Thermal -insulated effect testing arrangement of building wall phase transition heat preservation system heat preservation | |
CN209132188U (en) | A kind of building thermal insulation material heat-proof quality measuring system | |
CN2795813Y (en) | Multifunction intelligent sensing transmitter | |
CN202255773U (en) | Detecting and positioning device for leakage of caliduct | |
Zhang et al. | Analysis of the influence of different groundwater flow conditions on the thermal response test in Tangshan | |
KR20210049278A (en) | Heat permeability diagnostic device and control method thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
WD01 | Invention patent application deemed withdrawn after publication |