CN104391003A - Thermotechnical detection device and thermotechnical detection method based on thin body type energy-saving material - Google Patents
Thermotechnical detection device and thermotechnical detection method based on thin body type energy-saving material Download PDFInfo
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- CN104391003A CN104391003A CN201410684918.2A CN201410684918A CN104391003A CN 104391003 A CN104391003 A CN 104391003A CN 201410684918 A CN201410684918 A CN 201410684918A CN 104391003 A CN104391003 A CN 104391003A
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Abstract
The invention provides a thermotechnical detection device and a thermotechnical detection method based on a thin body type energy-saving material. The thermotechnical detection device comprises a heat tank and a cold tank, which are close to each other, wherein joint of the heat tank and the cold tank is separated through a test specimen frame; and a test specimen is arranged inside the test specimen frame. According to the thermotechnical detection device and the thermotechnical detection method, the blank of thermotechnical property detection of a thin body material in an industrial large-scale application is filled; and building of a unified standard for evaluating the thermotechnical property among different types of materials is facilitated through detection of the thin body material and a body material in the same application simulation environment.
Description
Technical field
The invention belongs to building energy saving field, specifically a kind of winer construction apparatus and method based on thin body type energy-saving material.
Background technology
Section bar taken leave of by skyscraper, block tradition energy-saving material is megatrend, and block insulation material causes wall facing to ftracture, seeps water, peels off, severe compromise; Researching and developing thin body energy-saving building materials has been the inevitable choice that energy-saving and emission-reduction are goed deep in countries in the world.
As the energy-saving building materials of brand new class, how its energy-saving effect is evaluated in analogy, and the thermal property that experiment detects thin body material is crucial, is also to solve the task of top priority that this class science and technology synthetic material large-scale promotion applies to construction field.
Based thin film class material, its physical property, energy-conserving action is not embodied in the coefficient of heat conductivity of traditional material employing and the product of thickness.Be not embodied in the advantage of conduction pattern heat trnasfer environment.Thin body material is more solve " free path is greater than particle diameter ", to thermal-radiating obstruct (certainly also having thin chamber vacuum or inert gas for heat conducting partition) under contactless environment.Therefore by test material " heat " or " heat transfer coefficient " Calculating material thermal resistance value, be that one can be analogous to traditional material and evaluates its thermal property, effective good method.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of winer construction device and method based on thin body type energy-saving material.
A kind of winer construction device based on thin body type energy-saving material, it is characterized in that comprising mutually near the hot case arranged and ice chest, the junction of described hot case and ice chest is separated by test specimen frame, test specimen is positioned in test specimen frame, test specimen frame headroom size is long × wide is 1000mm × 1000mm, test specimen frame size is long × wide is 1200mm × 1200mm, and each 100mm in test specimen frame surrounding adopts thermal resistance to be not less than 3.5m
2the thermal insulation material of K/W, cut off the thermal convection that test specimen frame periphery occurs, at utmost reduce the heat transfer of test specimen frame periphery, electric heater and the wet device of control is provided with in described hot case, the evaporator be connected with refrigerating machine is provided with in described ice chest, well heater and blower fan, blower fan top is provided with wind isolation board, described thermal property detector and temperature control to be connected with data acquisition system (DAS), several are also respectively arranged with for measuring the temperature sensor of air themperature and surface of test piece temperature in hot case and ice chest, temperature sensor and described temperature control to be connected with data acquisition system (DAS), electric heater in described hot case imitates engineer applied actual environment, its heat radiation wavelength chooses 200-2500nm.
Described a kind of winer construction device based on thin body type energy-saving material, it is characterized in that the inside dimension of described hot case and ice chest wide × height is not less than 2100mm × 2400mm, depth is not less than 2000mm, and the thermal resistance of hot case and ice chest outer wall materials is not less than 3.5m
2k/W, the total hemispherical emissivity of hot case inside surface is greater than 0.85, and hot box outer wall material is made up of homogeneous material, and ice chest outer wall adopts nonhygroscopic insulation material, inside surface adopt do not absorb water, corrosion-resistant material.
Described a kind of winer construction device based on thin body type energy-saving material, is characterized in that described wind isolation board adopts thermal resistance value to be not less than 1.0 m
2the extruded polystyrene board of K/W, wind isolation board is towards the surface of test specimen, and the total hemispherical emissivity of wind isolation board is greater than 0.85, and wind isolation board width is identical with ice chest insied width.
Described a kind of winer construction device based on thin body type energy-saving material, it is characterized in that described temperature sensor is evenly distributed on the metering region of test specimen, and the temperature sensor in hot case and ice chest is mutually corresponding to be arranged, and temperature sensor quantity is at least 2 every square metre.
Described a kind of winer construction device based on thin body type energy-saving material, is characterized in that there is protective housing in the outer setting of hot case and ice chest.
Described a kind of winer construction device based on thin body type energy-saving material carries out the method detected, and it is characterized in that comprising the steps:
1) select test specimen and install, sealing around test specimen during installation;
2) select test condition, during test environment effect of heat insulation, heater temperature is set as 40 DEG C, and during test indoor heat insulating effect in winter, heater temperature is set as 25 DEG C, and the temperature difference of hot case and ice chest controls more than 40 DEG C;
3) measure air themperature and surface of test piece temperature, connect computing machine by sensing device attemperating unit, automatic record;
4) thermal resistance, the heat transfer coefficient of calculation testing piece: after cool and hot box each sensing record data are basicly stable, enter the Data Detection record stage, the renewal in every 30 minutes of detection data or record single reading per minute record continuously and within 30 minutes, do weighted mean, then according to the heat transfer coefficient of following formulae discovery test specimen:
K =
In formula:
Q---heater heating power, w;
M
1---the hot box outer wall heat flow modulus determined by rating test, W/K
5;
M
t---the test specimen frame heat flow modulus determined by rating test, W/K;
the difference of the inside and outside surface area weighted mean of one hot box outer wall, K;
---the difference of test specimen frame hot side cold side surface area weighted mean, K
{;
The area of S---infill panel, m
2;
the thermal conductivity of-infill panel, W/ (m
2k);
---the mean temperature difference (MTD) on the hot side surface of infill panel and cold side surface, K;
A---test specimen area, m
2; Calculate by test specimen physical dimension, if test specimen is dome skylight, its area is by dome skylight horizontally-projected area grate;
T
h---hot case average temperature of air, DEG C;
T
c---ice chest average temperature of air, DEG C;
The energy saving of test specimen gets two position effective digitals,
The thermal resistance value R=1/K(m of test specimen
2k/W);
Surface of test piece coefficient of heat transfer correction: because this method of testing General Requirements cool and hot box temperature difference is more than 40 DEG C, namely material thermal resistance performance is mainly reflected in the relation between the surface of test piece temperature difference and thermoflux, in test specimen thermal resistance much larger than surface resistance of heat transfer, when forced convection, be sufficient with the test specimen both side surface temperature difference and air themperature determination test specimen heat transfer coefficient, therefore detect heat transfer coefficient and do not permit to do surface heat exchanging correction.
5) result of calculation and pilot assessment value are compared and studied, test heat flow modulus is demarcated or thermocouple correction specifies with reference in GB/T13475, GB/T10295.
Beneficial effect of the present invention is as follows:
Fill up the blank that in industrial scale applications, thin body material thermal property detects, detected in same application simulated environment by thin body material and type body material, be conducive to setting up thermal property evaluation unified standard between different kind of material.
Accompanying drawing explanation
Fig. 1 is apparatus structure schematic diagram of the present invention;
In figure, 1-hot case; 2-ice chest; 3-test specimen frame; 4-electric heater; 5-test specimen; 6-wind isolation board; 7-blower fan; 8-evaporator; 9-well heater; 10-protective housing; 11-air conditioner; The wet device of 12-control; 13-refrigerating machine; 14-temperature controls and data acquisition system (DAS).
Embodiment
Embodiment 1
Pick-up unit: comprise mutually near the hot case arranged and ice chest, the junction of hot case and ice chest is separated by test specimen frame, test specimen is positioned in test specimen frame, electric heater and the wet device of control is provided with in hot case, the evaporator be connected with refrigerating machine is provided with in ice chest, well heater and blower fan, blower fan top is provided with wind isolation board, thermal property detector and temperature control to be connected with data acquisition system (DAS), several are also respectively arranged with for measuring the temperature sensor of air themperature and surface of test piece temperature in hot case and ice chest, temperature sensor and temperature control to be connected with data acquisition system (DAS).The inside dimension of hot case and ice chest is wide × and height is respectively 2100mm × 2400mm, and depth is 2000mm, and the thermal resistance of hot case and ice chest outer wall materials is 3.5m
2k/W, the total hemispherical emissivity of hot case inside surface is 0.85, and hot box outer wall material is made up of homogeneous material, and ice chest outer wall adopts nonhygroscopic insulation material, inside surface adopt do not absorb water, corrosion-resistant material.Wind isolation board adopts thermal resistance value to be 1.0 m
2the extruded polystyrene board of K/W, wind isolation board is towards the surface of test specimen, and the total hemispherical emissivity of wind isolation board is 0.85, and wind isolation board width is identical with ice chest insied width.Temperature sensor is evenly distributed on the metering region of test specimen, and temperature sensor in hot case and ice chest is mutually corresponding arranges, and temperature sensor quantity is 6 every square metre.The outer setting of hot case and ice chest has protective housing.
Detection method comprises the steps:
1) select test specimen and install, sealing around test specimen during installation;
2) select test condition, heater temperature is set as 20 DEG C, and ice chest temperature is set as-20 DEG C;
3) measure air themperature and surface of test piece temperature, connect computing machine by sensing device attemperating unit, automatic record;
4) thermal resistance, the heat transfer coefficient of calculation testing piece: after cool and hot box each sensing record data are basicly stable, enter the Data Detection record stage, the renewal in every 30 minutes of detection data or record single reading per minute record continuously and within 30 minutes, do weighted mean, then according to the heat transfer coefficient of following formulae discovery test specimen:
K =
In formula:
Q---heater heating power, w;
M
1---the hot box outer wall heat flow modulus determined by rating test, W/K
5;
M
t---the test specimen frame heat flow modulus determined by rating test, W/K;
the difference of the inside and outside surface area weighted mean of one hot box outer wall, K;
---the difference of test specimen frame hot side cold side surface area weighted mean, K
{;
The area of S---infill panel, m
2;
the thermal conductivity of-infill panel, W/ (m
2k);
---the mean temperature difference (MTD) on the hot side surface of infill panel and cold side surface, K;
A---test specimen area, m
2; Calculate by test specimen physical dimension, if test specimen is dome skylight, its area is by dome skylight horizontally-projected area grate;
T
h---hot case average temperature of air, DEG C;
T
c---ice chest average temperature of air, DEG C;
The energy saving of test specimen gets two position effective digitals,
The thermal resistance value R=1/K(m of test specimen
2k/W);
Surface of test piece coefficient of heat transfer correction: because this method of testing General Requirements cool and hot box temperature difference is more than 40 DEG C, namely material thermal resistance performance is mainly reflected in the relation between the surface of test piece temperature difference and thermoflux, in test specimen thermal resistance much larger than surface resistance of heat transfer, when forced convection, be sufficient with the test specimen both side surface temperature difference and air themperature determination test specimen heat transfer coefficient, therefore detect heat transfer coefficient and do not permit to do surface heat exchanging correction.
Test and result of calculation:
:-0.4℃
:40.9℃
:39.2℃
t:40.1℃
:127.3 W
K=0.70 W/ (m
2 K)
R=1.428 m
2 K/W
Embodiment 2
Experiment condition is with embodiment 1.
Test and result of calculation:
:0.8℃
:40.8℃
:39.4℃
t:40.1℃
:127.3 W
K=0.52 W/ (m
2 K)
R=1.923 m
2 K/W
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., be all included within protection scope of the present invention.
Claims (6)
1. the winer construction device based on thin body type energy-saving material, it is characterized in that comprising mutually near the hot case arranged and ice chest, the junction of described hot case and ice chest is separated by test specimen frame, test specimen is positioned in test specimen frame, test specimen frame headroom size is long × wide is 1000mm × 1000mm, test specimen frame size is long × wide is 1200mm × 1200mm, and each 100mm in test specimen frame surrounding adopts thermal resistance to be not less than 3.5m
2the thermal insulation material of K/W, cut off the thermal convection that test specimen frame periphery occurs, at utmost reduce the heat transfer of test specimen frame periphery, electric heater and the wet device of control is provided with in described hot case, the evaporator be connected with refrigerating machine is provided with in described ice chest, well heater and blower fan, blower fan top is provided with wind isolation board, described thermal property detector and temperature control to be connected with data acquisition system (DAS), several are also respectively arranged with for measuring the temperature sensor of air themperature and surface of test piece temperature in hot case and ice chest, temperature sensor and described temperature control to be connected with data acquisition system (DAS), electric heater in described hot case imitates engineer applied actual environment, its heat radiation wavelength chooses 200-2500nm.
2. a kind of winer construction device based on thin body type energy-saving material as claimed in claim 1, it is characterized in that the inside dimension of described hot case and ice chest wide × height is not less than 2100mm × 2400mm, depth is not less than 2000mm, and the thermal resistance of hot case and ice chest outer wall materials is not less than 3.5m
2k/W, the total hemispherical emissivity of hot case inside surface is greater than 0.85, and hot box outer wall material is made up of homogeneous material, and ice chest outer wall adopts nonhygroscopic insulation material, inside surface adopt do not absorb water, corrosion-resistant material.
3. a kind of winer construction device based on thin body type energy-saving material as claimed in claim 1, is characterized in that described wind isolation board adopts thermal resistance value to be not less than 1.0 m
2the extruded polystyrene board of K/W, wind isolation board is towards the surface of test specimen, and the total hemispherical emissivity of wind isolation board is greater than 0.85, and wind isolation board width is identical with ice chest insied width.
4. a kind of winer construction device based on thin body type energy-saving material as claimed in claim 1, it is characterized in that described temperature sensor is evenly distributed on the metering region of test specimen, and the temperature sensor in hot case and ice chest is mutually corresponding to be arranged, and temperature sensor quantity is at least 2 every square metre.
5. a kind of winer construction device based on thin body type energy-saving material as claimed in claim 1, is characterized in that there is protective housing in the outer setting of hot case and ice chest.
6. use a kind of winer construction device based on thin body type energy-saving material as claimed in claim 1 to carry out the method detected, it is characterized in that comprising the steps:
1) select test specimen and install, sealing around test specimen during installation;
2) select test condition, during test environment effect of heat insulation, heater temperature is set as 40 DEG C, and during test indoor heat insulating effect in winter, heater temperature is set as 25 DEG C, and the temperature difference of hot case and ice chest controls more than 40 DEG C;
3) measure air themperature and surface of test piece temperature, connect computing machine by sensing device attemperating unit, automatic record;
4) thermal resistance, the heat transfer coefficient of calculation testing piece: after cool and hot box each sensing record data are basicly stable, enter the Data Detection record stage, the renewal in every 30 minutes of detection data or record single reading per minute record continuously and within 30 minutes, do weighted mean, then according to the heat transfer coefficient of following formulae discovery test specimen:
K =
In formula:
Q---heater heating power, w;
M
1---the hot box outer wall heat flow modulus determined by rating test, W/K
5;
M
t---the test specimen frame heat flow modulus determined by rating test, W/K;
the difference of the inside and outside surface area weighted mean of one hot box outer wall, K;
---the difference of test specimen frame hot side cold side surface area weighted mean, K
{;
The area of S---infill panel, m
2;
the thermal conductivity of-infill panel, W/ (m
2k);
---the mean temperature difference (MTD) on the hot side surface of infill panel and cold side surface, K;
A---test specimen area, m
2; Calculate by test specimen physical dimension, if test specimen is dome skylight, its area is by dome skylight horizontally-projected area grate;
T
h---hot case average temperature of air, DEG C;
T
c---ice chest average temperature of air, DEG C;
The energy saving of test specimen gets two position effective digitals,
The thermal resistance value R=1/K(m of test specimen
2k/W);
5) result of calculation and pilot assessment value are compared and studied, test heat flow modulus is demarcated or thermocouple correction specifies with reference in GB/T13475, GB/T10295.
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CN104990952A (en) * | 2015-07-02 | 2015-10-21 | 中国建材检验认证集团西安有限公司 | Method and equipment for measuring equivalent thermal conductivity coefficient of wall material |
CN105891257A (en) * | 2016-05-27 | 2016-08-24 | 天津市建筑材料产品质量监督检测中心 | Device and method for rapidly detecting heat transfer coefficient of glass based on unsteady-state heat transfer technology |
CN106053525A (en) * | 2016-05-27 | 2016-10-26 | 天津市建筑材料产品质量监督检测中心 | Method for quickly detecting glass heat transfer coefficient based on unsteady state heat transfer technology |
CN108776152A (en) * | 2018-05-02 | 2018-11-09 | 华南理工大学 | A kind of measuring system and method for building material surface heat exchange coefficient |
CN110736765A (en) * | 2019-11-22 | 2020-01-31 | 深圳市深科工程检测有限公司 | window heat preservation performance detection equipment and detection method |
CN110806425A (en) * | 2019-11-19 | 2020-02-18 | 河南日盛综合检测有限公司 | Wall body thermal insulation performance detecting system |
WO2021169350A1 (en) * | 2020-02-25 | 2021-09-02 | 贵州中建建筑科研设计院有限公司 | Device and method for dynamically testing thermal performance of building wall |
CN113340940A (en) * | 2021-06-28 | 2021-09-03 | 江苏省建筑工程质量检测中心有限公司 | Thermal detection method and detection device for integrated concrete combined external wall panel |
CN113640339A (en) * | 2021-05-07 | 2021-11-12 | 山东科技大学 | Material calorifics detection device |
CN113916931A (en) * | 2020-07-07 | 2022-01-11 | 中国科学院上海硅酸盐研究所 | Device and method for testing hemispherical emissivity of material at extremely low temperature |
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CN104990952B (en) * | 2015-07-02 | 2017-08-08 | 中国建材检验认证集团西安有限公司 | Method and equipment for measuring equivalent thermal conductivity coefficient of wall material |
CN104964999A (en) * | 2015-07-08 | 2015-10-07 | 浙江大学 | Device and method for testing equivalent thermal resistance of reflective thermal insulation coating material |
CN105891257A (en) * | 2016-05-27 | 2016-08-24 | 天津市建筑材料产品质量监督检测中心 | Device and method for rapidly detecting heat transfer coefficient of glass based on unsteady-state heat transfer technology |
CN106053525A (en) * | 2016-05-27 | 2016-10-26 | 天津市建筑材料产品质量监督检测中心 | Method for quickly detecting glass heat transfer coefficient based on unsteady state heat transfer technology |
CN108776152B (en) * | 2018-05-02 | 2020-02-18 | 华南理工大学 | System and method for measuring convection heat exchange coefficient of building material surface |
CN108776152A (en) * | 2018-05-02 | 2018-11-09 | 华南理工大学 | A kind of measuring system and method for building material surface heat exchange coefficient |
CN110806425A (en) * | 2019-11-19 | 2020-02-18 | 河南日盛综合检测有限公司 | Wall body thermal insulation performance detecting system |
CN110736765A (en) * | 2019-11-22 | 2020-01-31 | 深圳市深科工程检测有限公司 | window heat preservation performance detection equipment and detection method |
WO2021169350A1 (en) * | 2020-02-25 | 2021-09-02 | 贵州中建建筑科研设计院有限公司 | Device and method for dynamically testing thermal performance of building wall |
CN113916931A (en) * | 2020-07-07 | 2022-01-11 | 中国科学院上海硅酸盐研究所 | Device and method for testing hemispherical emissivity of material at extremely low temperature |
CN113640339A (en) * | 2021-05-07 | 2021-11-12 | 山东科技大学 | Material calorifics detection device |
CN113340940A (en) * | 2021-06-28 | 2021-09-03 | 江苏省建筑工程质量检测中心有限公司 | Thermal detection method and detection device for integrated concrete combined external wall panel |
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