CN100456030C - Hot and cold box heat transfer coefficient detector - Google Patents
Hot and cold box heat transfer coefficient detector Download PDFInfo
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- CN100456030C CN100456030C CNB2005100048745A CN200510004874A CN100456030C CN 100456030 C CN100456030 C CN 100456030C CN B2005100048745 A CNB2005100048745 A CN B2005100048745A CN 200510004874 A CN200510004874 A CN 200510004874A CN 100456030 C CN100456030 C CN 100456030C
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- 238000012546 transfer Methods 0.000 title claims abstract description 24
- 238000012360 testing method Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims description 2
- 239000000523 sample Substances 0.000 claims 2
- 238000005057 refrigeration Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000001931 thermography Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
一、技术领域 1. Technical field
建筑围护结构传热系数检测是建筑节能测试的重要内容，通过测量单位面积围护结构的传热量和热箱内外的空气温差，测得围护结构的传热系数。冷热箱式传热系数检测仪以单片机控制外部各种输入、输出信号，应用PID，数字滤波技术，提高了系统的可靠性。检测过程无需值守，自动保存全过程测量结果；另有通讯接口可以将测量结果上传至计算机，便于数据处理和保存。The heat transfer coefficient detection of the building envelope is an important part of the building energy saving test. The heat transfer coefficient of the envelope is measured by measuring the heat transfer per unit area of the envelope and the temperature difference between the inside and outside of the heat box. The hot and cold box-type heat transfer coefficient detector uses a single-chip microcomputer to control various external input and output signals, and applies PID and digital filter technology to improve the reliability of the system. There is no need to be on duty during the detection process, and the measurement results of the whole process are automatically saved; another communication interface can upload the measurement results to the computer, which is convenient for data processing and storage.
本仪器适用于建筑物围护结构现场节能检测，实现了不受采暖期限制的现场围护结构传热系数检测。This instrument is suitable for on-site energy-saving detection of building envelope structures, and realizes the detection of heat transfer coefficients of on-site envelope structures that are not limited by the heating period.
二、背景技术 2. Background technology
目前国内外用热箱法测试建筑构件传热系数的技术已普及，但将热箱法应用于现场测试围护结构传热系数的未见报导。目前国内外用于节能建筑现场检测的技术主要有热流计法和红外热像法，热流计法现场测试围护结构传热系数，必须在采暖期的最冷月进行，且每个热流计测试的是一个点，有效工作面积小，测量准确度差；红外热像法必须在室内有热源的情况下测试建筑物的热工性能，且测试的结果是热工缺陷，即哪些部位的保温做的有缺陷，不能对围护结构的热工性能进行定量测量。At present, the technology of testing the heat transfer coefficient of building components by the hot box method has been popularized at home and abroad, but there is no report on the application of the hot box method to the field test of the heat transfer coefficient of the envelope structure. At present, the technologies used for on-site inspection of energy-saving buildings at home and abroad mainly include heat flow meter method and infrared thermal imaging method. The heat flow meter method must be used to test the heat transfer coefficient of the enclosure structure on the spot, which must be carried out in the coldest month of the heating period, and each heat flow meter test It is a point, the effective working area is small, and the measurement accuracy is poor; the thermal imaging method must test the thermal performance of the building with a heat source indoors, and the test result is a thermal defect, that is, which parts are made of thermal insulation Defective, the thermal performance of the envelope cannot be quantitatively measured.
冷热箱式传热系数检测仪基本实现了不受季节限制，对被测部位的传热系数进行定量测试。The hot and cold box-type heat transfer coefficient detector basically realizes quantitative testing of the heat transfer coefficient of the measured part without being restricted by seasons.
三、发明内容 3. Contents of the invention
热箱法检测围护结构传热系数是基于“一维传热”的原理：即围护结构被测部位具有基本平行的两表面，其长度和宽度远远大于其厚度，视为无限大平板。在人工制造一个一维传热环境下，被测部位的内侧用热箱模拟采暖建筑室内条件，并使热箱内和室内空气温度保持一致，另一侧为室外自然条件或冷箱。维持热箱内温度始终高于室外温度，使被测部位的热量总是从室内向室外传递，形成了一维传热，当热箱内加热量与通过被测部位传递的热量达到平衡时，热箱的加热量就是被测部位的传热量。经运算得到被测部位的传热系数值。The hot box method to detect the heat transfer coefficient of the enclosure structure is based on the principle of "one-dimensional heat transfer": that is, the measured part of the enclosure structure has two basically parallel surfaces, and its length and width are far greater than its thickness, which is regarded as an infinite flat plate . In an artificially created one-dimensional heat transfer environment, a hot box is used to simulate the indoor conditions of the heating building on the inside of the measured part, and the temperature in the hot box is kept consistent with that of the indoor air, and the other side is the outdoor natural condition or a cold box. Keep the temperature in the hot box always higher than the outdoor temperature, so that the heat of the measured part is always transferred from the indoor to the outdoor, forming a one-dimensional heat transfer. When the heating in the hot box is in balance with the heat transferred through the measured part, The heating amount of the hot box is the heat transfer of the measured part. The heat transfer coefficient value of the measured part is obtained through calculation.
同时为避免干扰，使围护结构的测试数据更趋近于实际情况，所有采集的数据最后都可转化为Excel格式，方便检测人员借助电脑对被测数据进行分析。检测仪包括的部件有：At the same time, in order to avoid interference and make the test data of the enclosure structure closer to the actual situation, all the collected data can be converted into Excel format at last, which is convenient for the inspectors to analyze the measured data with the help of a computer. The components included in the tester are:
1、热箱：开口面积大于0.2m2，外壁热阻值应大于0.5m2·K/W，加热功率大于20W。1. Heat box: the opening area is greater than 0.2m 2 , the thermal resistance of the outer wall should be greater than 0.5m 2 ·K/W, and the heating power is greater than 20W.
2、冷箱：开口面积大于0.3m2，外壁热阻值应大于0.5m2·K/W。2. Cold box: the opening area is greater than 0.3m 2 , and the thermal resistance of the outer wall should be greater than 0.5m 2 ·K/W.
3、制冷机：制冷功率大于50W。3. Refrigerator: The cooling power is greater than 50W.
4、控制箱：主要是用来采集各点温度、热箱功率等值并进行控制、运算、存储。4. Control box: It is mainly used to collect the temperature of each point and the power of the heating box for control, calculation and storage.
5、温度传感器：采用铂电阻温度传感器或热电偶。5. Temperature sensor: use platinum resistance temperature sensor or thermocouple.
6、室内加热控制器。6. Indoor heating controller.
7、室内加热器。7. Indoor heater.
8、撑竿。8. Pole.
9、测试用软件、接口线、转换软件。9. Software for testing, interface cables, and conversion software.
四、附图说明 4. Description of drawings
下面结合附图和实施例对本实用新型进一步说明。Below in conjunction with accompanying drawing and embodiment the utility model is further described.
图中a-围护结构1，b-加热器，c-室内加热控制器，d-冷箱水浴，e-围护结构2，f-控制仪。In the figure a-enclosure structure 1, b-heater, c-indoor heating controller, d-cold box water bath, e-enclosure structure 2, f-controller.
T1-A箱室外空气温度，T2-A箱室外墙表温度，T3-A箱箱内空气温度，T4-A箱室内墙表温度，T5-内空气温度，T6-B箱箱内空气温度，T7-B箱室内墙表温度，T8-B箱室外空气温度，T9-B箱室外墙表温度。T 1 -outdoor air temperature of A box, T 2 -outdoor wall surface temperature of A box, T 3 -air temperature inside A box, T 4 -indoor wall surface temperature of A box, T 5 -inner air temperature, T 6 -B Air temperature inside the box, T 7 -B box indoor wall surface temperature, T 8 -B box outdoor air temperature, T 9 -B box outside wall surface temperature.
五、具体实施方式 5. Specific implementation
1、选定被测围护结构，用红外温度计测量被测墙体表面温度分布，选择温度分布均匀的部位作为被测位置。固定室内墙表温度传感器。将热箱的敞口端紧靠在被测位置，为达到密闭，应在热箱背面用撑杆顶牢。确认密闭。1. Select the enclosure structure to be tested, measure the temperature distribution on the surface of the wall to be tested with an infrared thermometer, and select the part with uniform temperature distribution as the measured position. Fix the indoor wall surface temperature sensor. Close the open end of the heat box to the position to be tested. In order to achieve airtightness, a support rod should be used on the back of the heat box to hold it firmly. Confirm airtight.
2、固定室外墙表温度传感器，使其位于相对热箱的中心位置，紧贴墙表，传感器端部用锡纸遮挡，避免日光直射；当室外温度较高时使用冷箱模拟室外环境条件，使冷箱内温度低于室内控制温度；固定室外空气温度传感器，离开墙表10～20cm的阴影下，并安装防辐射罩。固定室内空气温度传感器，使其位于被测房间中央，距地面1.5m处，并安装防辐射罩。2. Fix the temperature sensor on the outdoor wall surface so that it is located in the center of the hot box and close to the wall surface. The end of the sensor is covered with tin foil to avoid direct sunlight; when the outdoor temperature is high, use a cold box to simulate the outdoor environmental conditions. The temperature inside the cold box is lower than the indoor control temperature; fix the outdoor air temperature sensor, leave the wall surface in the shadow of 10-20cm, and install a radiation shield. Fix the indoor air temperature sensor so that it is located in the center of the room under test, 1.5m above the ground, and install a radiation shield.
3、连接各测温传感器、控制仪和热箱等。3. Connect the temperature measuring sensors, controllers and heating boxes, etc.
4、将热箱加热插头插入仪器箱的相应位置4. Insert the heating plug of the hot box into the corresponding position of the instrument box
5、连接室内加热用电暖气。5. Connect the electric heater for indoor heating.
6、打开电源开关，系统自检，按照屏幕显示进行操作。6. Turn on the power switch, the system checks itself, and operate according to the screen display.
7、自动进行测试。7. Test automatically.
8、检测完成用计算机采集并整理。8. After the detection is completed, it is collected and sorted by computer.
9、通过筛选数据，剔除不合格的数据项，可以计算被测围护结构的传热系数K值。9. By screening data and eliminating unqualified data items, the heat transfer coefficient K value of the measured enclosure structure can be calculated.
10、保存数据文件，生成2个文件，原始数据文件不可修改，另一个文件可用EXCEL进行数据处理。10. Save the data file and generate 2 files. The original data file cannot be modified, and the other file can be processed by EXCEL.
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| CNB2005100048745A CN100456030C (en) | 2005-02-03 | 2005-02-03 | Hot and cold box heat transfer coefficient detector |
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| CNB2005100048745A CN100456030C (en) | 2005-02-03 | 2005-02-03 | Hot and cold box heat transfer coefficient detector |
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| CN100456030C true CN100456030C (en) | 2009-01-28 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078699B (en) * | 2007-06-26 | 2010-05-26 | 东南大学 | Testing method for overall thermal insulation performance of enclosure 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 |
| CN101196485B (en) * | 2007-12-25 | 2010-06-02 | 沈阳科正建筑工程检测有限公司 | Testing apparatus for thermal circulation performance of building curtain wall and control method thereof |
| CN104458801B (en) * | 2014-12-12 | 2017-01-25 | 中冶建筑研究总院有限公司 | Detection device and method for measuring heat conduction coefficient and heat resistance of component by adopting dynamic hot-box method |
| CN104677934A (en) * | 2015-03-11 | 2015-06-03 | 工业和信息化部邮电工业标准化研究所 | Heat transfer coefficient testing system and method for cabinet body |
| CN105572163B (en) * | 2016-01-23 | 2018-08-21 | 太原理工大学 | Heat conducting coefficient measurement device under concrete drying regime |
| CN106018470B (en) * | 2016-05-19 | 2019-04-16 | 重庆大学 | A kind of construction wall dynamic heat transfer procedural test method |
| CN107976465A (en) * | 2016-10-25 | 2018-05-01 | 刘奇 | A kind of various structural thermal coefficient detection methods of building enclosure and detection device |
| CN110133044A (en) * | 2019-06-04 | 2019-08-16 | 河南省建筑科学研究院有限公司 | Building enclosure structure heat transfer coefficient tests overall process monitoring device and method |
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2005
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Patent Citations (4)
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|---|---|---|---|---|
| US4647221A (en) * | 1984-03-23 | 1987-03-03 | Digana Ag | Method of and apparatus for the determination of the thermal insulating properties of building walls |
| DE4333482A1 (en) * | 1993-10-01 | 1995-04-06 | Wilfried Prof Dr Heimke | Method and arrangement for determining thermal conductivity in building walls |
| JP2002309689A (en) * | 2001-04-18 | 2002-10-23 | Fukuoka Pref Gov Sangyo Kagaku Gijutsu Shinko Zaidan | Wall structure for heat insulation and heat transfer |
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