CN201697888U - Thermal inertia index detection device for single material space enclosing structures - Google Patents
Thermal inertia index detection device for single material space enclosing structures Download PDFInfo
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- CN201697888U CN201697888U CN2010203010144U CN201020301014U CN201697888U CN 201697888 U CN201697888 U CN 201697888U CN 2010203010144 U CN2010203010144 U CN 2010203010144U CN 201020301014 U CN201020301014 U CN 201020301014U CN 201697888 U CN201697888 U CN 201697888U
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Abstract
A thermal inertia index detection device for single material space enclosing structures comprises a hot box arranged in the middle of the outer side of a space enclosing structure to be detected in an upside down manner, wherein an adjustable heat source is arranged in the hot box, heat flux sensors are adhered to the outer surface of the box body of the hot box, an outer temperature sensor and an outer heat flux sensor are in tight contact with the outer wall surface of the space enclosing structure to be detected in the hot box, an inner temperature sensor and an inner heat flux sensor are in tight contact with the symmetrical inner wall surface of the space enclosing structure to be detected, all the sensors are connected with the input end of a concentrator through communication wires, the output end of the concentrator is connected with a signal inspection device through a communication wire, a communication interface of the signal inspection device is connected with an arithmetic device through a data wire, and the adjustable heat source is connected with a controller through a control data wire and generates a one-dimensional steady state heat transfer process on the side of the space enclosing structure to be detected in contact with the hot box. The utility model measures dynamic thermal parameters in relation to thermal inertia indexes and calculates on the basis of the parameters, so as to shorten the detection time and reduce the limit of natural conditions on detection.
Description
Technical field
The present invention relates to the detection method of architectural exterior-protecting construction heat inertia index, can be used for the on-the-spot thermal testing of building energy conservation.
Background technology
Along with the growing interest of China to building energy conservation work, the thermal property detection technique that is directed to architectural exterior-protecting construction also develops perfect constantly.China's southern area is very hot summer, requires building enclosure to need the comfort level that excellent heat insulation property is kept indoor thermal environment, to reduce air conditioning energy consumption.
According to present relevant national standards, judge to the building enclosure heat-proof quality mainly is to be undertaken by the height that compares outside air temperature peak value and building enclosure internal face temperature peak, and its essence is the standard that is used as weighing the heat-proof quality quality according to heat transfer coefficient.
But at southern area, the summer temp wave amplitude is very big, the architectural exterior-protecting construction under being in the unsteady-state heat transfer condition, only adopt this index of heat transfer coefficient can not estimate the thermal property of building enclosure all sidedly, also should estimate with opposing temperature wave and hot-fluid ripple heat inertia index D of transmission capacity in architectural exterior-protecting construction.Yet, still do not have now a kind of can be accurately the pick-up unit of heat inertia index easily.
Summary of the invention
The utility model provides a kind of pick-up unit of homogenous material building enclosure heat inertia index, solve the technical matters of accurate, convenient measurement homogenous material building enclosure heat inertia index.
The technical scheme that its technical matters that solves the utility model adopts is:
A kind of pick-up unit of homogenous material building enclosure heat inertia index, it is characterized in that: comprise a hot case that buckles middle side part outside tested building enclosure, adjustable thermal source is arranged in the hot case, box outer surface at hot case posts the tank wall heat flux sensor, in hot case, the outside wall surface of tested building enclosure closely contact has temperature outside sensor and outside heat flux sensor, the tight contact of symmetrical internal face in tested building enclosure has inboard temperature sensor and inboard heat flux sensor, each sensor all is connected with the input end of hub by communication connection, the output terminal of hub is connected with the signal logging by communication connection, the signal logging is used to write down the dynamic thermal parameter that temperature sensor and heat flux sensor record, the communication interface of signal logging is connected with arithmetical unit by data line, arithmetical unit receives the detection signal of temperature sensor and heat flux sensor and obtains the heat inertia index of tested building enclosure with stable state and astable computing method, adjustable thermal source is connected with controller by the control data line, and the side that adjustable thermal source makes tested building enclosure contact with hot case produces the one-dimensional stable diabatic process.
The tank wall heat flux sensor is all posted in top, following, the left side of described hot box body outer wall, the right side, positive outside.
Described tested building enclosure can be brick wall, concrete walls or board wall.
Described inboard temperature sensor and temperature outside sensor can be occasionally semiconductor thermistors of platinum resistance thermometer sensor,, bimetallic strip, copper thermistor, thermoelectricity.
Described inboard heat flux sensor, outside heat flux sensor and tank wall heat flux sensor can be board-like heat flow meter or mechanical type calorimeter.
Described controller can be computing machine or programmable single chip computer.
The present invention compared with prior art has the following advantages:
1. low to the weather conditions requirement, can manually adjust test environment, reduce the influence of climatic factor to test result.
2. testing result is accurate, fast, tests overall process and is robotization from data acquisition, transmission storage, operation calculating, result's demonstration.
3. equipment is simple, can reduce testing cost greatly.
4. testing process time weak point is easy and simple to handle, saves detection time.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment one;
Fig. 2 is the structural representation of the utility model embodiment two.
The tested building enclosure of 1-, 2-signal logging, 3-arithmetical unit, 4-controller, the hot case of 5-, the adjustable thermal source of 6-, 7-hub, the inboard temperature sensor of 8-, the inboard heat flux sensor of 9-, 10-temperature outside sensor, 11-outside heat flux sensor, 13-computing machine, 14-tank wall heat flux sensor.
Embodiment
Embodiment one as shown in Figure 1, a kind of pick-up unit of homogenous material building enclosure heat inertia index, it is characterized in that: comprise a hot case 5 that buckles middle side part outside tested building enclosure 1, adjustable thermal source 6 is arranged in the hot case, box outer surface at hot case posts tank wall heat flux sensor 14, in hot case, the outside wall surface of tested building enclosure closely contact has temperature outside sensor 10 and outside heat flux sensor 11, the tight contact of symmetrical internal face in tested building enclosure has inboard temperature sensor 8 and inboard heat flux sensor 9, each sensor all is connected by the input end of communication connection with hub 7, the output terminal of hub is connected with signal logging 2 by communication connection, the signal logging is used to write down the dynamic thermal parameter that temperature sensor and heat flux sensor record, the communication interface of signal logging is connected with arithmetical unit 3 by data line, arithmetical unit receives the detection signal of temperature sensor and heat flux sensor and obtains the heat inertia index of tested building enclosure with stable state and astable computing method, adjustable thermal source 6 is connected with controller 4 by the control data line, and the side that adjustable thermal source makes tested building enclosure contact with hot case produces the one-dimensional stable diabatic process.Controller 4 can be a programmable single chip computer.
Tank wall heat flux sensor 14 is all posted in top, following, the left side of described hot box body outer wall, the right side, positive outside.
Described tested building enclosure 1 is brick wall, concrete walls or board wall.
Described inboard temperature sensor 8 and temperature outside sensor 10 are occasionally semiconductor thermistors of platinum resistance thermometer sensor,, bimetallic strip, copper thermistor, thermoelectricity.
Described inboard heat flux sensor 9, outside heat flux sensor 11 and tank wall heat flux sensor 14 are board-like heat flow meter or mechanical type calorimeter.
Embodiment two is referring to Fig. 2: different with embodiment one is that described controller 4 and arithmetical unit 3 are combined in the computing machine 13.
The pick-up unit of this homogenous material building enclosure heat inertia index, a kind of method that can detect homogenous material building enclosure heat inertia index accurately, easily is provided, calculate by measuring the dynamic thermal parameter relevant with heat inertia index, shorten detection time, reduce the restriction that detects natural conditions.
Heat inertia index D equals the product of thermal resistance R and heat storage coefficient S, and thermal resistance R is by detecting building enclosure heat flow density q and surfaces externally and internally temperature difference Δ t:, according to thermal conduction study formula R=Δ t/q: obtain thermal resistance; Heat storage coefficient S is by setting up the object natural cooling unstable state thermal equilibrium differential equation, trying to achieve in conjunction with linear fitting method.The known natural cooling unstable state thermal equilibrium differential equation is
Wherein K is a wall heat transfer coefficient, can determine t according to the convection current surface film thermal conductance of thermal resistance R and regulation
0Be the body of wall cooling finishing temperature after stable, F is a heat transfer surface area, and t is a temperature variable, and τ is a time variable.
This balance differential equation separate for
T wherein
MaxFor the initial temperature of body of wall cooling, this formula is carried out abbreviation, can get
Make ln (t-t
0)=Θ, ln (t
Max-t
0)=Θ
0=constant, then the differential equation is separated and be can be changed into Θ=B τ+Θ
0, wherein
Therefore only need the body of wall outside wall surface temperature t of continuous recording time interval τ, from t
MaxUntil cooling equilibrium temperature t
0, just can obtain a series of time τs relevant with heat storage coefficient S
iWith temperature t
iValue.Utilize least square fitting to obtain the linear equation t=a τ+b of " time-temperature ", wherein
B=t-a τ,
Linear fit equation and the differential equation separated compare, just can obtain
Finally obtain
Substitution formula D=RS obtains heat inertia index
The detection method of embodiment one is referring to as shown in Figure 1:
1) on tested building enclosure 1 inside and outside symmetria bilateralis position, places temperature sensor and heat flux sensor, hot case 5 is closely buckled at the building enclosure outside surface.
2) on hot case 5 each radiating surface, arrange tank wall heat flux sensor 14, so that definite heat flow value on tested building enclosure 1 direction.
3) temperature sensor, the heat flux sensor with all installations is wired to hub 7, hub 7 and signal logging 2, arithmetical unit 3 joined successively again.
4) the adjustable thermal source 6 in the hot case 5 is connected with controller 4.
5) adjustable thermal source 6 is stabilized in power W
1Work, area and heat flow density according to each radiating surface, just can obtain the heat flow density between hot case and the tested building enclosure surface of contact, signal logging inspection 2 is surveyed temperature sensor data delivery at the building enclosure surfaces externally and internally in arithmetical unit 3 and calculate 13, obtains the thermal resistance R of building enclosure.
6) stop the work of adjustable thermal source 6 by controller 4, make building enclosure outside surface natural cooling, changing value when signal logging 2 is noted pursuing of hull-skin temperature, to be cooled reach stable after, calculate the heat storage coefficient S of building enclosure by arithmetical unit 3, in conjunction with the thermal resistance R that has obtained, try to achieve heat inertia index D.
The detection method of embodiment two is referring to shown in Figure 2:
When 1) detecting at the scene, controller and arithmetical unit can be substituted by computing machine 13, temperature sensor is selected platinum resistance, heat flux sensor is selected board-like heat flow meter, heat inertia index to a common brick wall detects, at first platinum resistance and board-like heat flow meter are respectively arranged in monosymmetric position inside and outside body of wall central authorities, the platinum resistance of both sides inside and outside the body of wall and the heat flow meter on heat flow meter and five air surface of contact of hot case are connected to hub by lead, adjustable thermal source 6 in computing machine 13 and the hot case 5 is joined, last connecting hub 7, signal logging 2 and computing machine 13 are finished the installation process of equipment.
2) utilize the hot case 5 of computing machine 13 controls to start, regulate thermal source by a certain power W
1Heating, the acquisition time step-length of signal logging 2 is set to 30s, monitors the temperature and the hot-fluid situation of the inside and outside both sides of body of wall wall in real time.After surpassing 6h heat time heating time, compare the heat flow density value q in the outside in the synchronization body of wall
InAnd q
Out, less than 5%, computing machine judges that automatically this heat transfer reaches steady-state process as if both differences, according to heat flow density value and the wall surface temperature value that signal logging 2 is gathered, computing machine 13 calculates the thermal resistance R and the Coefficient K of body of wall.
3) working condition of the hot case 5 of adjustment makes it stop heating, and signal logging 2 is noted the body of wall temperature initial value t of this moment
Max, according to the temperature variations of the interval of time step 10s prison exterior surface of wall, the time to be cooled surpasses 3h, and the temperature value t of double collection
iAnd t
I+1Difference less than after 5 ‰, computing machine judges that this cooling procedure reaches equilibrium state, according to the equilibrium temperature value that signal logging 2 is gathered, automatically outside wall surface " temperature-time " situation of change of cooling procedure is carried out linear fit, calculates heat storage coefficient S.Last in conjunction with the thermal resistance R that has tried to achieve, obtain the heat inertia index D of body of wall
1
4), can adjust hot case as required at power W in order to guarantee the accuracy of testing result
2Following work repeats said process, obtains a series of heat inertia index D
2, D
3, D
4D
i, ask its arithmetic mean
The most final result.
A kind of pick-up unit and method of homogenous material building enclosure heat inertia index, utilize a hot case that can produce different capacity, build the diabatic process that needs in the architectural exterior-protecting construction both sides, then utilize the signal logging that the detection signal of temperature sensor on the building enclosure ancient piece of jade, round, flat and with a hole in its centre face and heat flux sensor is carried out record, be delivered to by in the arithmetical unit by data line, adopt stable state and astable computing method to obtain the building enclosure heat inertia index.
Adopt the utility model to be to the concrete grammar that the architectural exterior-protecting construction heat inertia index detects:
1) in the center of building enclosure, inside and outside symmetria bilateralis is laid temperature sensor and heat flux sensor, is connected to the signal logging by communication connection.
2) will control hot case and be installed in the building enclosure outer surface, and the hot-fluid on the outside surface takes into account temperature sensor and be in the center that hot case covers, guarantee that hot case contacts with the tight of building enclosure.
3) regulate the thermal value of hot case with controller, treat under its heating situation that is in a certain power, after treating that building enclosure forms the one-dimensional stable diabatic process,, be delivered to and calculate thermal resistance of enclosing structure and heat transfer coefficient in the arithmetical unit automatically by temperature and the hot-fluid situation that the signal logging is gathered wall.
4) after obtaining thermal resistance value, control hot case this moment and stop heating, make the building enclosure of detection be in the state of natural cooling, the signal logging writes down the building enclosure surface temperature under each time step automatically, up to being cooled to steady state (SS).
5) arithmetical unit carries out regression treatment to the transient of building enclosure natural cooling, adopts the mode of linear fit, determines the fitting coefficient value relevant with heat storage coefficient, finally determines the heat storage coefficient of this structure.
6) according to the thermal resistance of enclosing structure and the heat storage coefficient that obtain, obtain heat inertia index.
The utility model utilizes a hot case, build the diabatic process that needs in the architectural exterior-protecting construction both sides, dynamic thermal parameter on the building enclosure wall that temperature sensor and heat flow meter are recorded is delivered to be deposited in the signal logging, utilizes arithmetical unit to adopt stable state and astable computing method to obtain the heat inertia index of building enclosure.
Employed hot case can produce stable hot-fluid, and a side that makes building enclosure contact with it produces the one-dimensional stable diabatic process, to satisfy the demand that detects.
In carrying out steady state heat transfer and unsteady-state heat transfer test process, the acquisition time step-length of signal logging is between 10 seconds-30 seconds.
Adopt the hot case heating building enclosure time to be no less than 6h, outside symmetric position heat flow density value difference is different from 5% in the synchronization.The time of building enclosure natural cooling is no less than 3h, and front and back surface temperature difference at interval is less than 5 ‰.
Claims (6)
1. the pick-up unit of a homogenous material building enclosure heat inertia index, it is characterized in that: comprise a hot case (5) that buckles middle side part outside tested building enclosure (1), adjustable thermal source (6) is arranged in the hot case, box outer surface at hot case posts tank wall heat flux sensor (14), in hot case, the outside wall surface of tested building enclosure (1) closely contact has temperature outside sensor (10) and outside heat flux sensor (11), the tight contact of symmetrical internal face in tested building enclosure (1) has inboard temperature sensor (8) and inboard heat flux sensor (9), each sensor all is connected by the input end of communication connection with hub (7), the output terminal of hub is connected with signal logging (2) by communication connection, the signal logging is used to write down the dynamic thermal parameter that temperature sensor and heat flux sensor record, the communication interface of signal logging is connected with arithmetical unit (3) by data line, arithmetical unit (3) receives the detection signal of temperature sensor and heat flux sensor and obtains the heat inertia index of tested building enclosure with stable state and astable computing method, adjustable thermal source (6) is connected with controller (4) by the control data line, and the side that adjustable thermal source (6) makes tested building enclosure contact with hot case produces the one-dimensional stable diabatic process.
2. the pick-up unit of a kind of homogenous material building enclosure heat inertia index according to claim 1 is characterized in that: tank wall heat flux sensor (14) is all posted in top, following, the left side of described hot box body outer wall, the right side, positive outside.
3. the pick-up unit of a kind of homogenous material building enclosure heat inertia index according to claim 1 and 2 is characterized in that: described tested building enclosure is brick wall, concrete walls or board wall.
4. the pick-up unit of a kind of homogenous material building enclosure heat inertia index according to claim 1 and 2 is characterized in that: described inboard temperature sensor and temperature outside sensor are occasionally semiconductor thermistors of platinum resistance thermometer sensor,, bimetallic strip, copper thermistor, thermoelectricity.
5. the pick-up unit of a kind of homogenous material building enclosure heat inertia index according to claim 1 and 2 is characterized in that: described inboard heat flux sensor, outside heat flux sensor and tank wall heat flux sensor are board-like heat flow meter or mechanical type calorimeter.
6. the pick-up unit of a kind of homogenous material building enclosure heat inertia index according to claim 1 and 2 is characterized in that: described controller is computing machine or programmable single chip computer.
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| CN2010203010144U CN201697888U (en) | 2010-01-20 | 2010-01-20 | Thermal inertia index detection device for single material space enclosing structures |
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| CN2010203010144U CN201697888U (en) | 2010-01-20 | 2010-01-20 | Thermal inertia index detection device for single material space enclosing structures |
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Cited By (7)
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| CN103308554A (en) * | 2012-03-15 | 2013-09-18 | 李莉 | Method for detecting internal thermodynamic defects of wall enclosure structure for building |
| WO2014000397A1 (en) * | 2012-06-26 | 2014-01-03 | 中国建筑科学研究院 | Building wall apparent heat transfer coefficient on-site detection method |
| CN107389226A (en) * | 2017-07-19 | 2017-11-24 | 中国科学院寒区旱区环境与工程研究所 | A kind of Frozen Ground Area heat pipe floor data detection means based on heat flow density |
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| CN108431566A (en) * | 2015-12-21 | 2018-08-21 | 皇家飞利浦有限公司 | The method for predicting the equilibrium temperature of heat flow transducer |
| CN111413364A (en) * | 2020-04-10 | 2020-07-14 | 上海理工大学 | In-situ nondestructive testing method and system for concrete heat storage coefficient in building wall |
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Cited By (12)
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| CN103308554A (en) * | 2012-03-15 | 2013-09-18 | 李莉 | Method for detecting internal thermodynamic defects of wall enclosure structure for building |
| CN103308554B (en) * | 2012-03-15 | 2016-03-30 | 李莉 | A kind of thermal technology's Inner Defect Testing method of masonry wall structure for building |
| WO2014000397A1 (en) * | 2012-06-26 | 2014-01-03 | 中国建筑科学研究院 | Building wall apparent heat transfer coefficient on-site detection method |
| CN108431566A (en) * | 2015-12-21 | 2018-08-21 | 皇家飞利浦有限公司 | The method for predicting the equilibrium temperature of heat flow transducer |
| US11366027B2 (en) | 2015-12-21 | 2022-06-21 | Koninklijke Philips N.V. | Method of predicting a stabilization temperature of a heat-flow sensor |
| CN108431566B (en) * | 2015-12-21 | 2023-01-17 | 皇家飞利浦有限公司 | Method for predicting stable temperature of heat flow sensor |
| CN107421980A (en) * | 2017-02-04 | 2017-12-01 | 青岛大学 | Heating impedance compensation type thermo-resistance measurement method |
| CN107421980B (en) * | 2017-02-04 | 2019-08-23 | 青岛大学 | Heating impedance compensation type thermo-resistance measurement method |
| CN107389226A (en) * | 2017-07-19 | 2017-11-24 | 中国科学院寒区旱区环境与工程研究所 | A kind of Frozen Ground Area heat pipe floor data detection means based on heat flow density |
| CN111413364A (en) * | 2020-04-10 | 2020-07-14 | 上海理工大学 | In-situ nondestructive testing method and system for concrete heat storage coefficient in building wall |
| CN111413364B (en) * | 2020-04-10 | 2022-10-04 | 上海理工大学 | In-situ nondestructive testing method and system for concrete heat storage coefficient in building wall |
| CN111721803A (en) * | 2020-06-28 | 2020-09-29 | 吉林建筑大学 | Wall climbing robot for measuring thermal resistance of wall body, control system and method |
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Owner name: CHINA ARCHITECTURE DESIGN INSTITUTE CO., LTD. Free format text: FORMER OWNER: CHINA INSTITUTE OF BUILDING STANDARD DESIGN + RESEARCH Effective date: 20150616 |
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Effective date of registration: 20150616 Address after: 100044 Beijing City, the number of cars on the main street, Xicheng District Patentee after: CHINA ARCHITECTURE DESIGN INSTITUTE CO., LTD. Address before: 100044 Beijing City, the number of cars on the main street, Xicheng District Patentee before: China Architecture Design & Research Institute |
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