CN105301050A - Large-scale light-transmitting enclosure structure heat transfer coefficient detection equipment and method - Google Patents
Large-scale light-transmitting enclosure structure heat transfer coefficient detection equipment and method Download PDFInfo
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- CN105301050A CN105301050A CN201510870498.1A CN201510870498A CN105301050A CN 105301050 A CN105301050 A CN 105301050A CN 201510870498 A CN201510870498 A CN 201510870498A CN 105301050 A CN105301050 A CN 105301050A
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- 238000012546 transfer Methods 0.000 title claims abstract description 36
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- 238000010438 heat treatment Methods 0.000 claims abstract description 5
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Abstract
The invention provides a detection device and a detection method for heat transfer coefficients of a large light-transmitting enclosure structure, which mainly comprise an environmental chamber, a hot box, a test piece frame, a cold box, a hoisting device, a data acquisition and automatic control device, wherein an air conditioning device is arranged in the environmental chamber; the hot box is arranged in a movable mode, an electric structure is arranged at the bottom of the hot box, a door is arranged on one side surface of the hot box, and a speed-regulating fan and an adjustable air port are arranged in the hot box; one side of the test piece frame is fixedly connected with the cold box, and the other side of the test piece frame is tightly matched with the hot box; the cold box is provided with an evaporator and auxiliary heating equipment; the hoisting equipment is positioned above the environment chamber. The invention uses the relatively simple structure and method to detect the heat transfer coefficients of the large light-transmitting building envelopes with various sizes, and can keep higher detection precision.
Description
Technical field
The present invention relates to a kind of heavy construction curtain wall heat transfer coefficient checkout equipment and method, particularly relate to a kind of Apparatus and method for being applicable to the large-scale printing opacity enclosure structure heat transfer coefficient accurately detecting various sizes.
Background technology
Building curtain wall is the important component part of Public Building Envelope.The light-penetration building structural members such as glass curtain wall are the links that in building external envelope structure, thermal property is the weakest, by the energy consumption of light-penetration building structural member, in whole building energy consumption, occupy appreciable ratio.
Statistics shows, since entering this century, China's building curtain wall annual consumption over the years is the summation of other countries of world annual consumption.Along with further developing of economy, as the curtain wall of peripheral structure, have employed glass curtain wall more and more, the heating air conditioning energy consumption of buildings is increased severely.Curtain wall heat-insulating property is bad, both wastes energy, and may produce condensation again, and condensation will cause indoor thermal environment not good; Curtain wall heat-proof quality is poor, not only increases substantially air conditioning energy consumption, also can affect indoor thermal comfort.The thermal property of curtain wall does not reach the requirement of building thermal performance design, certainly will cause CO
2discharge capacity increases, and causes urban air pollution, and energy for building waste is serious, does not also meet the energy saving policy of country.
Along with constantly carrying out of China's Building Energy-saving Work, design standard for energy efficiency of buildings improves constantly, heat transfer coefficient particularly for heavy construction curtain wall requires more and more stricter, and at present China does not also possess the ability accurately detecting large-scale printing opacity enclosure structure heat transfer coefficient, therefore can the accurately checkout equipment of testing large printing opacity enclosure structure heat transfer coefficient and method in the urgent need to development.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of checkout equipment and method of large-scale printing opacity enclosure structure heat transfer coefficient, the heat transfer coefficient of the large-scale printing opacity building enclosure of various sizes can be detected by relatively simple structure and method, and can higher accuracy of detection be kept.
For solving the problems of the technologies described above, the invention provides a kind of checkout equipment of large-scale printing opacity enclosure structure heat transfer coefficient, mainly comprising environmental chamber, hot case, test specimen frame, ice chest, hanging device, data acquisition and autocontrol device.Be provided with conditioner in environmental chamber, hot case, test specimen frame, ice chest, hanging device are all placed in environmental chamber.Hot case is set to movable-type, and electric structure is installed in bottom, and a side of hot case has door, and hot case inside is provided with adjustable speed fan and Adjustable air port.Test specimen frame side is fixedly connected with ice chest, and opposite side and hot case closely cooperate.Ice chest is provided with evaporator and ancillary heating equipment.Hanging device is positioned at the top of environmental chamber.
Present invention also offers a kind of method of testing of large-scale printing opacity enclosure structure heat transfer coefficient, comprise the following steps: the first step, adjusting ambient indoor air temperature and flow velocity, make it to reach stable equilibrium.Second step, according to the size of test specimen, the installation completing test specimen is fixed, if sample dimensions is less than test specimen frame, the space the be less than insulation material shutoff of known heat transfer coefficient; 3rd step, moves to test specimen frame side by thermal environment case, and checks that confirmation coordinates closely, does not have obvious space; 4th step, opening device, temperature field, flow field parameter also turn-on data collection simultaneously and control system in the hot case needed for setting experiment, ice chest; 5th step, after probe temperature reaches setting value, if by time the measurement absolute value that obtains the average temperature of air change per hour of hot case and ice chest be not more than 0.3 DEG C, the absolute value of the difference change per hour of the Area-weighted medial temperature on the difference of the Area-weighted medial temperature on the inside and outside surface of hot case and the hot side of test specimen frame, cold side surface is all not more than 0.3 DEG C, and the change of said temperature and the temperature difference is not unidirectional change, can judge that experiment reaches steady heat transfer, then gather and record steady testing data, and according to image data, calculate the heat transfer coefficient of test specimen.
The present invention relatively simple structure and method detect the heat transfer coefficient of the large-scale printing opacity building enclosure of various sizes, and can keep higher accuracy of detection.Hot case is set to movable-type, electric structure is installed in bottom, hot case is facilitated to move forward and backward, large-scale and super-huge building curtain wall is installed for convenience and provides possibility, test specimen frame is set to and directly can assembles test specimen, also can be equipped with the insulation plugging material of different size, with the test of satisfied different size dimension printing opacity building enclosure, the test specimen that hanging device makes erection weight larger becomes possibility, substantially increases work efficiency.
Accompanying drawing explanation
Fig. 1 is large-scale printing opacity enclosure structure heat transfer coefficient assay device structures principle schematic.
Embodiment
Below in conjunction with the drawings and specific embodiments, a nearly step detailed description is done to the present invention.
As shown in Figure 1, the hardware of large-scale printing opacity enclosure structure heat transfer coefficient checkout equipment forms primarily of environmental chamber 5, hot case 1, test specimen frame 2, ice chest 3, hanging device 8, wherein hot case 1 is also referred to as " heat death theory case ", because all temperature points and power measuring point are all placed on hot case 1 side, relative ice chest 3, hot case 1, except having the function in the specific temperature field of formation and velocity field, has also needed the metering effect of whole test process; In addition, software aspect, checkout equipment also has automatic control program and data acquisition program.In Fig. 1, Q
1for the heat transfer capacity by test specimen, Q
2for the heat transfer capacity by test specimen frame, Q
3for the heat transfer capacity by hot box body, Q
pfor keeping adding heat needed for fc-specific test FC temperature.
(1) environmental chamber
Environmental chamber 5 is available to the stable space that equipment runs.Size is about long 11m, wide 6m, high 7m, material is assembled by the expansion polyphenyl plate color steel that thick 200mm is thick, inner installation two vertical DC convertible frequency air-conditioners and two hanging-type DC frequency converting air-conditioners, intersect at diagonally opposing corner respectively and install, install speed governing ceiling fan simultaneously at top, a little Room air distribution design system is formed, to ensure having more uniform temperature in environmental chamber with the centrifugal blower 12 bottom hot case.During test, by the air temperature control of environmental chamber to identical with air themperature in hot case, can by the heat transfer capacity Q by hot box body
3reduce to 0, will greatly improve the accuracy of test result like this.
(2) hot case
Hot case is used for simulating printing opacity building enclosure indoor climate condition, and hot case is set to movable-type, and electric structure is installed in bottom, in the square hole dug, spread guide rail, facilitates hot case to move forward and backward, installs large-scale and super-huge building curtain wall for convenience and provide possibility.The casing of hot case 1 is assembled by the expansion polyphenyl plate color steel that 200mm is thick, makes the thermal resistance of casing self be greater than 5m
2k/W.Be provided with electric heater in hot case, air themperature constant temperature in hot case can be ensured by automatic control system.Simultaneously, the air current composition system be made up of adjustable speed fan 6 and adjustable air-port 7 is also provided with in hot case, greatly can reduce well heater in hot case, heat the air themperature gradient caused, make in hot case relatively more even along the temperature field of short transverse, ensure that mean wind speed is within the scope of 0.2 ± 0.1m/s in test specimen frame hot side surface 50mm plane.Vertically arrange three layers of thermopair in hot case 1 as air measuring point, every layer is evenly arranged 4.Except that face contacted with test specimen frame, the inside and outside both sides in other 5 faces of hot case 1 arrange several surface temperature measuring points respectively.One side of hot case has door, facilitates the turnover of people and the carrying of small-size test piece.
(3) test specimen frame
Test specimen frame side is fixedly connected with ice chest, and opposite side and hot case closely cooperate.Test specimen frame 2 is used to installation test specimen 4, and the framework of test specimen frame 2 adopts the thick expansion polyphenyl battenboard of 400mm, makes the thermal resistance of framework self be greater than 8m
2k/W.As one innovation, test specimen frame is set to and directly can assembles test specimen, also can be equipped with the insulation plugging material of different size, with the test of satisfied different size dimension printing opacity building enclosure.When test specimen size is less than test specimen frame, seal after adopting the insulation material shutoff of close with specimen thickness, known heat transfer coefficient to clog.Meanwhile, paste the temperature point of some in insulation material both side surface, measure the mean temperature difference (MTD) on two surfaces, to calculate the thermal loss by this insulation material.
(4) ice chest
Ice chest 3 lands installation, and casing is assembled by the expansion polyphenyl plate color steel that 200mm is thick, makes the thermal resistance of casing self be greater than 5m
2k/W.Ice chest is used for simulating printing opacity building enclosure outdoor climate conditions, by the evaporator be arranged in case, air lowered the temperature, adopt the method controlling electric heater auxiliary heating to make the air themperature in ice chest constant, and utilize deep bead 9, blower fan 10 and grid 11 to carry out forced convection, make to form top-down uniform air flow along surface of test piece, keep mean wind speed to reach 3.0m/s.
(5) hanging device
Because common large-scale printing opacity building enclosure weight is comparatively large, depend merely on artificial installation and be difficult to realize.By installing hanging device 8 at testing apparatus top, the test specimen making erection weight larger becomes possibility, substantially increases work efficiency.
This checkout equipment adopts computing machine to do core, controls testing process comprehensively.Carried out the sampling and processing of temperature data by computing machine transmission instruction to Acquisition Instrument, and then carried out the sampling and processing of power data by computing machine transmission instruction to power meter.After temperature information is gathered by Acquisition Instrument, send into Computer Storage, and automatically calculate according to program.Data collection interval can set arbitrarily, and test findings can observe at any time, export.Process of the test is convenient and swift, and can ensure higher measuring accuracy.
Test process
The first step, adjusting ambient indoor air temperature and flow velocity, make it to reach stable equilibrium, ambient room air temperature controlled to identical with case air themperature hot when testing as far as possible.The second, according to the size of test specimen 4, select the need of fill insulant material in test specimen frame.If do not needed, be arranged on by test specimen 4 in test specimen frame 2, the seam crossing of test specimen 4 and frame is tight with insulation material filling, must not inside and outside through gap.3rd step, moves to test specimen frame side by thermal environment case, and checks that confirmation coordinates closely, does not have obvious space, 4th step, opening device, temperature field, flow field parameter also turn-on data collection simultaneously and control system in the hot case needed for setting experiment, ice chest, 5th step, after probe temperature reaches setting value, if by time the measurement absolute value that obtains the average temperature of air change per hour of hot case and ice chest be not more than 0.3 DEG C, in hot case, the difference of the Area-weighted medial temperature of outside surface and the hot side of test specimen frame, the absolute value of the difference change per hour of the Area-weighted medial temperature on cold side surface is all not more than 0.3 DEG C, and the change of said temperature and the temperature difference is not unidirectional change, can judge that experiment reaches steady heat transfer, then gather and record steady testing data, according to image data, the heat transfer coefficient of test specimen can be calculated.
Be appreciated that under the prerequisite not deviating from inner characteristic of the present invention, the present invention also can have various deformation, is not limited in the concrete structure of above-mentioned embodiment, and do the understanding of broad sense in the scope that should limit in claim.In a word, the present invention should comprise those apparent conversion or alternative to those skilled in the art.
Claims (7)
1. the checkout equipment of one kind large-scale printing opacity enclosure structure heat transfer coefficient, it is characterized in that: mainly comprise environmental chamber, hot case, test specimen frame, ice chest, hanging device, data acquisition and autocontrol device, be provided with conditioner in described environmental chamber, described hot case, described test specimen frame, described ice chest, described hanging device are all placed in described environmental chamber; Described hot case is set to movable-type, and electric structure is installed in bottom, and a side of described hot case has door, and described hot case inside is provided with adjustable speed fan and Adjustable air port; Described test specimen frame side is fixedly connected with described ice chest, and opposite side and described hot case closely cooperate; Described ice chest is provided with evaporator and ancillary heating equipment; Described hanging device is positioned at the top of described environmental chamber.
2. the checkout equipment of large-scale printing opacity enclosure structure heat transfer coefficient as claimed in claim 1, is characterized in that, the structure of described test specimen frame is set to directly can assemble test specimen, the insulation plugging material of the different size that also can be connected.
3. the checkout equipment of large-scale printing opacity enclosure structure heat transfer coefficient as claimed in claim 2, is characterized in that, described insulation plugging material both side surface pastes the temperature point of some.
4. the checkout equipment of large-scale printing opacity enclosure structure heat transfer coefficient as claimed in claim 1, is characterized in that, the framework of described test specimen frame adopts the thick expansion polyphenyl battenboard of 400mm, and the thermal resistance of framework self is greater than 8m
2k/W.
5. the checkout equipment of large-scale printing opacity enclosure structure heat transfer coefficient as claimed in claim 1, is characterized in that, the casing of described hot case and described ice chest is assembled by the expansion polyphenyl plate color steel that 200mm is thick, and the thermal resistance of casing self is greater than 5m
2k/W.
6. the checkout equipment of large-scale printing opacity enclosure structure heat transfer coefficient as claimed in claim 1, is characterized in that, vertically arranges three layers of thermopair in described hot case.
7. utilize the checkout equipment of the large-scale printing opacity enclosure structure heat transfer coefficient described in claim 1 to carry out a method of testing, it is characterized in that comprising the following steps: the first step, adjusting ambient indoor air temperature and flow velocity, make it to reach stable equilibrium.Second step, according to the size of test specimen, the installation completing test specimen is fixed, if sample dimensions is less than test specimen frame, the space the be less than insulation material shutoff of known heat transfer coefficient; 3rd step, moves to test specimen frame side by thermal environment case, and checks that confirmation coordinates closely, does not have obvious space; 4th step, opening device, temperature field, flow field parameter also turn-on data collection simultaneously and control system in the hot case needed for setting experiment, ice chest; 5th step, after probe temperature reaches setting value, if by time the measurement absolute value that obtains the average temperature of air change per hour of hot case and ice chest be not more than 0.3 DEG C, the absolute value of the difference change per hour of the Area-weighted medial temperature on the difference of the Area-weighted medial temperature on the inside and outside surface of hot case and the hot side of test specimen frame, cold side surface is all not more than 0.3 DEG C, and the change of said temperature and the temperature difference is not unidirectional change, can judge that experiment reaches steady heat transfer, then gather and record steady testing data, and according to image data, calculate the heat transfer coefficient of test specimen.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018476A (en) * | 2016-08-11 | 2016-10-12 | 福建省建研工程顾问有限公司 | Photovoltaic member heat-transfer coefficient testing device and method thereof |
| CN107462430A (en) * | 2017-06-30 | 2017-12-12 | 上海建工集团股份有限公司 | Climatic environment cabin for thermal performance of building envelope test |
| CN107631978A (en) * | 2017-09-08 | 2018-01-26 | 上海市建筑科学研究院 | A kind of cladding durability test method for simulating true climatic environment simulation |
| CN108593705A (en) * | 2018-04-04 | 2018-09-28 | 镇江市建科工程质量检测中心有限公司 | A kind of test frame and wall insulation performance detection device |
| CN108760612A (en) * | 2018-08-17 | 2018-11-06 | 中国建筑科学研究院有限公司 | Light transmission building enclosure endurance quality detection device and method |
| CN113720875A (en) * | 2021-11-03 | 2021-11-30 | 菏泽天顺新能源设备有限公司 | Control system of heat transfer effect testing device and use method |
| CN117250227A (en) * | 2023-11-17 | 2023-12-19 | 西南交通大学 | 3D printed concrete surface heat exchange characteristic constant temperature test system, method and application |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018476A (en) * | 2016-08-11 | 2016-10-12 | 福建省建研工程顾问有限公司 | Photovoltaic member heat-transfer coefficient testing device and method thereof |
| CN106018476B (en) * | 2016-08-11 | 2019-04-16 | 福建省建研工程顾问有限公司 | A kind of photovoltaic component heat transfer coefficient testing device and its method |
| CN107462430A (en) * | 2017-06-30 | 2017-12-12 | 上海建工集团股份有限公司 | Climatic environment cabin for thermal performance of building envelope test |
| CN107631978A (en) * | 2017-09-08 | 2018-01-26 | 上海市建筑科学研究院 | A kind of cladding durability test method for simulating true climatic environment simulation |
| CN107631978B (en) * | 2017-09-08 | 2020-01-14 | 上海市建筑科学研究院 | Method for testing durability of enclosure material by simulating real climate environment characteristics |
| CN108593705A (en) * | 2018-04-04 | 2018-09-28 | 镇江市建科工程质量检测中心有限公司 | A kind of test frame and wall insulation performance detection device |
| CN108593705B (en) * | 2018-04-04 | 2024-04-02 | 镇江市建设工程质量检测中心有限公司 | Test frame and wall body thermal insulation performance detection device |
| CN108760612A (en) * | 2018-08-17 | 2018-11-06 | 中国建筑科学研究院有限公司 | Light transmission building enclosure endurance quality detection device and method |
| CN113720875A (en) * | 2021-11-03 | 2021-11-30 | 菏泽天顺新能源设备有限公司 | Control system of heat transfer effect testing device and use method |
| CN117250227A (en) * | 2023-11-17 | 2023-12-19 | 西南交通大学 | 3D printed concrete surface heat exchange characteristic constant temperature test system, method and application |
| CN117250227B (en) * | 2023-11-17 | 2024-01-23 | 西南交通大学 | 3D printed concrete surface heat exchange characteristic constant temperature test system, method and application |
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Application publication date: 20160203 |