CN118759000A - A device and method for detecting thermal resistance and heat transfer coefficient of building wall materials - Google Patents
A device and method for detecting thermal resistance and heat transfer coefficient of building wall materials Download PDFInfo
- Publication number
- CN118759000A CN118759000A CN202411023277.6A CN202411023277A CN118759000A CN 118759000 A CN118759000 A CN 118759000A CN 202411023277 A CN202411023277 A CN 202411023277A CN 118759000 A CN118759000 A CN 118759000A
- Authority
- CN
- China
- Prior art keywords
- box
- building wall
- wall material
- cold
- hot
- 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
- 239000000463 material Substances 0.000 title claims abstract description 86
- 238000012546 transfer Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000012360 testing method Methods 0.000 claims abstract description 64
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 230000004907 flux Effects 0.000 claims description 23
- 238000001514 detection method Methods 0.000 claims description 13
- 230000007613 environmental effect Effects 0.000 claims 1
- 238000013100 final test Methods 0.000 claims 1
- 230000004044 response Effects 0.000 abstract description 3
- 238000004364 calculation method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000013480 data collection Methods 0.000 description 2
- 238000001739 density measurement Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 1
- 101000827703 Homo sapiens Polyphosphoinositide phosphatase Proteins 0.000 description 1
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 1
- 102100023591 Polyphosphoinositide phosphatase Human genes 0.000 description 1
- 101100012902 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) FIG2 gene Proteins 0.000 description 1
- 101100233916 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) KAR5 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011464 hollow brick Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Description
技术领域Technical Field
本发明涉及建筑工程检测技术领域，具体为一种建筑墙体材料热阻、传热系数检测装置及其检测方法。The invention relates to the technical field of building engineering detection, in particular to a device for detecting thermal resistance and heat transfer coefficient of building wall materials and a detection method thereof.
背景技术Background Art
建筑物的墙体材料和保温材料的热性能直接影响建筑的能源消耗和室内舒适度。通过测试K值和R值，可以为建筑设计提供重要的参考信息，帮助优化建筑物的热工性能。选择具有较低传热系数和较高热阻的材料可以减少热量的传导和传输，降低能源消耗，提高建筑的节能效果。The thermal performance of a building's wall materials and insulation materials directly affects the building's energy consumption and indoor comfort. By testing the K value and R value, important reference information can be provided for building design to help optimize the building's thermal performance. Selecting materials with lower heat transfer coefficients and higher thermal resistance can reduce heat conduction and transmission, reduce energy consumption, and improve the building's energy-saving effect.
传统方法中对匀质材料(加气砼砌块、XPS挤塑板)的常规测试方法大多采用平板热导仪先测试出其导热系数，再除以其厚度，即可得到其传热系数。Conventional testing methods for homogeneous materials (aerated concrete blocks, XPS extruded boards) mostly use a flat-plate thermal conductivity meter to first test their thermal conductivity, and then divide it by its thickness to obtain its heat transfer coefficient.
同时，非均质材料如煤矸石多孔砖、砼空心砖、复合保温板，由于其内结构特性，不能用导热系数来表征其性能，只能直接测试其传热系数，现有技术中大多通过采用热流计法、标定热箱法和防护热箱法来对非匀质材料传热系数进行测试。At the same time, due to their internal structural characteristics, the thermal conductivity of heterogeneous materials such as coal gangue porous bricks, concrete hollow bricks, and composite insulation boards cannot be used to characterize their performance. Their heat transfer coefficients can only be directly tested. Most of the existing technologies use heat flow meter method, calibrated hot box method, and protective hot box method to test the heat transfer coefficient of heterogeneous materials.
但是热流计法、标定热箱法和防护热箱法在常规测试中具有如下局限性：However, the heat flow meter method, the calibrated hot box method, and the guarded hot box method have the following limitations in conventional testing:
热流计法：1)测试周期长，受室外环境温度波动性较大；2)数据处理工作冗繁。3)修正方法易引起的试验误差。Heat flow meter method: 1) The test cycle is long and is subject to large fluctuations in outdoor ambient temperature; 2) Data processing is cumbersome. 3) The correction method is prone to experimental errors.
标定热箱法：1)结果表达方式的局限性，无法测试出试件的热阻；2)热流系数不确定容易引起试验误差。Calibrated hot box method: 1) The limitation of the result expression method makes it impossible to test the thermal resistance of the specimen; 2) The uncertainty of the heat flux coefficient can easily lead to experimental errors.
防护热箱法：热流系数不确定容易引起试验误差。Guarded hot box method: The uncertainty of heat flow coefficient can easily lead to experimental errors.
因此，提出一种建筑墙体材料热阻、传热系数检测装置及其检测方法。Therefore, a device and method for detecting thermal resistance and heat transfer coefficient of building wall materials are proposed.
发明内容Summary of the invention
本发明的目的在于提供一种建筑墙体材料热阻、传热系数检测装置及其检测方法，以解决上述背景技术中提出的问题。The object of the present invention is to provide a device and method for detecting thermal resistance and heat transfer coefficient of building wall materials, so as to solve the problems raised in the above-mentioned background technology.
为解决上述技术问题，本发明提供如下技术方案：一种建筑墙体材料热阻、传热系数检测装置，包括从左至右依次设置的热箱、试件框、冷箱，所述热箱、试件框、冷箱两两之间均设置有密封衬垫，且所述热箱、试件框、冷箱依次配合连接，In order to solve the above technical problems, the present invention provides the following technical solutions: a device for detecting thermal resistance and heat transfer coefficient of building wall materials, comprising a hot box, a test piece frame, and a cold box arranged in sequence from left to right, wherein sealing gaskets are arranged between each of the hot box, the test piece frame, and the cold box, and the hot box, the test piece frame, and the cold box are connected in sequence.
所述热箱的内部设置有用于将待测建筑墙体材料加热的热源件，The interior of the heat box is provided with a heat source element for heating the building wall material to be tested.
所述试件框用于放置待测建筑墙体材料，The test piece frame is used to place the building wall material to be tested.
所述冷箱的内部设置有用于将待测建筑墙体材料制冷的制冷件，The cold box is provided with a refrigeration element for cooling the building wall material to be tested.
其中，所述热箱、冷箱将试件框夹合，而后对试件框内的待测建筑墙体材料两侧进行加热、制冷形成温差。The hot box and the cold box clamp the test piece frame, and then heat and cool the two sides of the building wall material to be tested in the test piece frame to form a temperature difference.
优选的，所述热源件包括计量箱，所述计量箱的下部设置有滚轮，位于所述热箱的内部设置有用于滚轮移动的滑道，以使计量箱在热箱内部滑移。Preferably, the heat source component comprises a metering box, a roller is provided at the lower portion of the metering box, and a slideway for moving the roller is provided inside the heat box so that the metering box can slide inside the heat box.
优选的，所述计量箱的上部开设有多组导向孔，多组所述导向孔的内部设置有导向杆，所述导向杆的端部与热箱内壁相连，以使计量箱通过导向杆导向移动。Preferably, a plurality of guide holes are provided on the upper portion of the metering box, guide rods are provided inside the plurality of guide holes, and the ends of the guide rods are connected to the inner wall of the heat box so that the metering box can be guided and moved by the guide rods.
优选的，所述计量箱为凹槽状设置，位于所述计量箱的开口侧铰接有第一导流屏，所述第一导流屏的两侧分别设置有多组用于检测计量箱內环境温度、待测建筑墙体材料位于热箱侧温度的第一环境温度传感器、第一表面温度传感器。Preferably, the meter box is arranged in a groove shape, and a first guide screen is hingedly connected to the opening side of the meter box. Multiple groups of first ambient temperature sensors and first surface temperature sensors for detecting the ambient temperature inside the meter box and the temperature of the building wall material to be tested on the hot box side are arranged on both sides of the first guide screen.
优选的，位于所述计量箱内壁均贴附有多组用于检测通过计量箱壁热流密度的热流板。Preferably, multiple groups of heat flux plates for detecting the heat flux density passing through the wall of the metering box are attached to the inner wall of the metering box.
优选的，所述计量箱、热箱的内部均设置有加热器，位于所述计量箱、热箱的内壁设置有多组轴流风机，位于所述计量箱、热箱内的轴流风机风向相反，且位于所述计量箱内部的轴流风机风向向下。Preferably, heaters are provided inside the metering box and the heat box, and multiple groups of axial flow fans are provided on the inner walls of the metering box and the heat box. The wind directions of the axial flow fans inside the metering box and the heat box are opposite, and the wind direction of the axial flow fan inside the metering box is downward.
优选的，所述制冷件包括设置于冷箱内的风幕机，位于所述风幕机的正下方设置有蒸发器；Preferably, the refrigeration unit includes an air curtain machine arranged in the cold box, and an evaporator is arranged directly below the air curtain machine;
位于所述冷箱内铰接有第二导流屏，位于所述第二导流屏的两侧分别设置有多组用于检测冷箱內环境温度、待测建筑墙体材料位于冷箱侧温度的第二环境温度传感器、第二表面温度传感器。A second guide screen is hinged in the cold box, and multiple groups of second ambient temperature sensors and second surface temperature sensors for detecting the ambient temperature in the cold box and the temperature of the building wall material to be tested on the cold box side are respectively arranged on both sides of the second guide screen.
优选的，所述热箱、试件框、冷箱的下部均设置有承载板，所述承载板的四周设置有用于移动的万向轮。Preferably, a bearing plate is provided at the bottom of the hot box, the specimen frame and the cold box, and universal wheels for movement are provided around the bearing plate.
优选的，位于所述冷箱处的承载板上还设置有控制柜，所述控制柜侧设置有压缩机。Preferably, a control cabinet is also provided on the bearing plate located at the cold box, and a compressor is provided on the side of the control cabinet.
一种建筑墙体材料热阻、传热系数检测装置的检测方法，包括以下步骤：A detection method for a thermal resistance and heat transfer coefficient detection device of a building wall material comprises the following steps:
步骤A、将待测建筑墙体材料安装在试件框内并进行养护；Step A, installing the building wall material to be tested in the test piece frame and performing maintenance;
步骤B、养护期满后，推动计量箱，控制计量箱通过滚轮在滑道内部移动，同时计量箱导向孔顺沿导向杆移动，直至第一导流屏侧的第一表面温度传感器移出；Step B: After the maintenance period expires, the metering box is pushed to control the metering box to move inside the slideway through the rollers, and at the same time, the guide hole of the metering box moves along the guide rod until the first surface temperature sensor on the first guide screen side is moved out;
步骤C、通过万向轮移动位于热箱、试件框、冷箱下部的承载板，直至将冷箱、热箱扣合在试件框上，计量箱、冷箱内置的第一表面温度传感器、第二表面温度传感器分别顶触至待测建筑墙体材料的热侧、冷侧，关闭外部锁扣使冷箱、热箱、试件框之间密闭严实；Step C, moving the bearing plate located at the bottom of the hot box, the specimen frame, and the cold box by the universal wheel until the cold box and the hot box are buckled on the specimen frame, the first surface temperature sensor and the second surface temperature sensor built into the metering box and the cold box are respectively pressed against the hot side and the cold side of the building wall material to be tested, and closing the external lock to make the cold box, the hot box, and the specimen frame tightly sealed;
步骤D、启动冷箱侧的压缩机和风幕机，同时启动热箱、计量箱内的加热器和轴流风机，控制柜通过第一环境温度传感器、第二环境温度传感器设置冷箱、热箱、计量箱内部的环境温度，设置巡检周期15s～30s，依据巡检周期记录第一表面温度传感器、第二表面温度传感器和热流板的数值分别为Tsi、Tse和qi；Step D, start the compressor and air curtain machine on the cold box side, and start the heater and axial flow fan in the hot box and the metering box at the same time. The control cabinet sets the ambient temperature inside the cold box, the hot box and the metering box through the first ambient temperature sensor and the second ambient temperature sensor, sets the inspection cycle to 15s to 30s, and records the values of the first surface temperature sensor, the second surface temperature sensor and the heat flux plate according to the inspection cycle as T si , T se and qi respectively;
步骤E、待第一表面温度传感器、第二表面温度传感器记录数值达到稳定传热状态后，选择每30min分钟的测试数据，设定在稳态条件下3h后停机；Step E: After the values recorded by the first surface temperature sensor and the second surface temperature sensor reach a stable heat transfer state, select test data every 30 minutes and set the machine to shut down after 3 hours under steady-state conditions;
步骤F、依据步骤E中得到的测试数据，对于每支温度传感器和热流板，算取各自6个实测值的平均值做为该参数的最终试验数据，得出Tsi、Tse和qi；Step F: Based on the test data obtained in step E, for each temperature sensor and heat flux plate, the average value of the six measured values is calculated as the final test data of the parameter, and T si , T se and qi are obtained;
步骤F、计算待测建筑墙体材料的传热系数K值和热阻R值，公式如下；Step F, calculating the heat transfer coefficient K value and thermal resistance R value of the building wall material to be tested, the formula is as follows;
其中，R为待测建筑墙体材料热阻，单位为m2·K/W；Where R is the thermal resistance of the building wall material to be tested, in units of m 2 ·K/W;
A为垂直于热流的面积，单位为m2；A is the area perpendicular to the heat flow, in m 2 ;
Tsi、Tse为待测建筑墙体材料热侧、冷侧表面温度，单位为℃；T si and T se are the surface temperatures of the hot and cold sides of the building wall material to be tested, in °C;
为通过待测建筑墙体材料的热流量，单位为W； is the heat flow through the building wall material to be tested, in W;
Tni、Tne为待测建筑墙体材料位于热箱侧、冷箱侧环境温度，单位为℃；T ni and T ne are the ambient temperatures of the building wall materials to be tested on the hot box side and the cold box side, in °C;
为计量箱内加热器功率，单位为W； It is the power of the heater in the metering box, in W;
为平行于待测建筑墙体材料的不平衡热流量，单位为W，达到稳态时 is the unbalanced heat flow parallel to the building wall material to be tested, in W, when it reaches steady state
为通过计量箱壁的热流量，单位为W； is the heat flux through the wall of the metering box, in W;
为通过计量箱第i面的热量，单位为W； is the heat passing through the i-th side of the metering box, in W;
qi为计量箱第i面的热流密度，单位为W/m2； qi is the heat flux density of the i-th surface of the metering box, in W/m 2 ;
A3i为计量箱第i面的面积，单位为m2。A 3i is the area of the i-th surface of the metering box, in m 2 .
与现有技术相比，本发明的有益效果是：Compared with the prior art, the present invention has the following beneficial effects:
本发明通过设置的热箱、冷箱和试件框，可对待测建筑墙体材料的测试周期缩短，装置中的冷、热箱通过密封衬垫实现密闭，箱体扣合并提供稳定的温度环境，使得待测建筑墙体材料能够在较短的时间内达到稳态。相比传统热流计法的长周期测试(通常为5到7天)，密闭箱体可以防止外界环境对试件的影响，使得试验过程中的温度变化主要受到装置控制，消除了待测建筑墙体材料响应时间的影响，可以显著减少测试时间，提高效率。The present invention can shorten the test cycle of the building wall material to be tested by setting up a hot box, a cold box and a test piece frame. The cold and hot boxes in the device are sealed by sealing gaskets, and the box body is buckled and provides a stable temperature environment, so that the building wall material to be tested can reach a steady state in a shorter time. Compared with the long-cycle test of the traditional heat flux meter method (usually 5 to 7 days), the closed box can prevent the influence of the external environment on the test piece, so that the temperature change during the test is mainly controlled by the device, eliminating the influence of the response time of the building wall material to be tested, which can significantly reduce the test time and improve efficiency.
同时将待测建筑墙体材料置于试验室标准条件下养护，并且养护周期固定，消除了受室外天气条件波动的影响。待测建筑墙体材料在相同的养护周期内被测试，使得测试数据具有可比性。这样一来，无需进行复杂的预处理和筛选工作，可以直接使用获得的稳态数据进行分析和计算，简化了数据处理过程。At the same time, the building wall materials to be tested are placed in the laboratory for curing under standard conditions, and the curing cycle is fixed, eliminating the influence of fluctuations in outdoor weather conditions. The building wall materials to be tested are tested within the same curing cycle, making the test data comparable. In this way, there is no need for complex preprocessing and screening work, and the obtained steady-state data can be directly used for analysis and calculation, simplifying the data processing process.
墙体材料热阻、传热系数检测装置中的计算公式被设计为同时包含热阻R和传热系数K的表达方式。具体结构中的计算公式中包含试件的尺寸、温度差、试验室条件等参数。通过测量试件的输入功率和温度差，可以直接计算得出热阻和传热系数的值。这样一来，可以更全面地评估试件的传热性能，提供了热阻和传热系数的综合结果表达。The calculation formula in the wall material thermal resistance and heat transfer coefficient detection device is designed to include the expression of thermal resistance R and heat transfer coefficient K at the same time. The calculation formula in the specific structure includes parameters such as the size of the specimen, temperature difference, and laboratory conditions. By measuring the input power and temperature difference of the specimen, the values of thermal resistance and heat transfer coefficient can be directly calculated. In this way, the heat transfer performance of the specimen can be evaluated more comprehensively, providing a comprehensive expression of thermal resistance and heat transfer coefficient.
装置中的结构设计通过控制能量的传导，可以准确测量试件的输入功率和温度差。通过精确测量这些参数，并将其应用于计算公式中，可以获得准确的热阻和传热系数值。试验室条件的控制也有助于确保温度差的稳定性和精确性。参数测量和控制能够产生更可靠和准确的结果。The structural design in the device can accurately measure the input power and temperature difference of the test piece by controlling the conduction of energy. By accurately measuring these parameters and applying them to the calculation formula, accurate values of thermal resistance and heat transfer coefficient can be obtained. Control of test room conditions also helps to ensure the stability and accuracy of temperature difference. Parameter measurement and control can produce more reliable and accurate results.
墙体材料热阻、传热系数检测装置中，具备热流密度的测量功能。通过测量热流密度q，可以直接获取热量的输入功率。这样避免了传统热流计法中使用的热流系数M与温差Δθ相乘的方法，消除了热流系数的不确定度。消除了标定热箱法和防护热箱法中关于热流系数的局限性。The wall material thermal resistance and heat transfer coefficient detection device has the function of measuring heat flux density. By measuring the heat flux density q, the input power of heat can be directly obtained. This avoids the method of multiplying the heat flux coefficient M and the temperature difference Δθ used in the traditional heat flow meter method, eliminating the uncertainty of the heat flux coefficient. It eliminates the limitations of the heat flux coefficient in the calibration hot box method and the protective hot box method.
本发明中的具体结构设计和测量方法提供了更稳定和可靠的操作环境和数据采集，从而增加了结果的可靠性。通过密闭箱体结构和精确的热流密度测量，可以减少外界干扰因素对结果的影响，并提供更可信赖的计算结果。The specific structural design and measurement method of the present invention provide a more stable and reliable operating environment and data collection, thereby increasing the reliability of the results. Through the closed box structure and accurate heat flux density measurement, the influence of external interference factors on the results can be reduced, and more reliable calculation results can be provided.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为本发明实施例的整体结构示意图；FIG1 is a schematic diagram of the overall structure of an embodiment of the present invention;
图2为本发明实施例的冷箱结构示意图；FIG2 is a schematic diagram of the cold box structure of an embodiment of the present invention;
图3为本发明实施例的冷箱内部结构示意图；FIG3 is a schematic diagram of the internal structure of a cold box according to an embodiment of the present invention;
图4为本发明实施例的热箱结构示意图；FIG4 is a schematic diagram of the heat box structure of an embodiment of the present invention;
图5为本发明实施例的计量箱内部结构示意图；5 is a schematic diagram of the internal structure of the metering box according to an embodiment of the present invention;
图6为本发明实施例的热箱内部结构示意图；FIG6 is a schematic diagram of the internal structure of a heat box according to an embodiment of the present invention;
图7为本发明实施例的第一导流屏结构示意图；FIG7 is a schematic structural diagram of a first guide barrier according to an embodiment of the present invention;
图8为本发明实施例的第二导流屏结构示意图。FIG. 8 is a schematic diagram of the structure of a second guide barrier according to an embodiment of the present invention.
图中：100、热箱；101、计量箱；101a、导向孔；102、滚轮；103、滑道；104、导向杆；105、第一导流屏；106、第一环境温度传感器；107、第一表面温度传感器；108、热流板；109、加热器；110、轴流风机；200、试件框；300、冷箱；301、风幕机；302、蒸发器；303、第二导流屏；304、第二环境温度传感器；305、第二表面温度传感器；400、承载板；500、控制柜；600、压缩机。In the figure: 100, hot box; 101, metering box; 101a, guide hole; 102, roller; 103, slide; 104, guide rod; 105, first guide screen; 106, first ambient temperature sensor; 107, first surface temperature sensor; 108, heat flow plate; 109, heater; 110, axial flow fan; 200, specimen frame; 300, cold box; 301, air curtain; 302, evaporator; 303, second guide screen; 304, second ambient temperature sensor; 305, second surface temperature sensor; 400, bearing plate; 500, control cabinet; 600, compressor.
具体实施方式DETAILED DESCRIPTION
为了便于解决现有技术测定热阻、传热系数不准确的问题，本发明提供了一种建筑墙体材料热阻、传热系数检测装置及其检测方法。下面将结合本发明中的附图，对本发明中的技术方案进行清楚、完整地描述，显然，所描述的发明仅仅是本发明一部分发明，而不是全部的发明。基于本发明中的发明，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他发明，都属于本发明保护的范围。In order to solve the problem of inaccurate determination of thermal resistance and heat transfer coefficient in the prior art, the present invention provides a device for detecting thermal resistance and heat transfer coefficient of building wall materials and a detection method thereof. The technical scheme of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the invention described is only a part of the invention of the present invention, not the whole invention. Based on the invention of the present invention, all other inventions obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.
请参阅图1-8，本发明提供了一种建筑墙体材料热阻、传热系数检测装置，包括从左至右依次设置的热箱100、试件框200、冷箱300，所述热箱100、试件框200、冷箱300依次配合连接，Referring to FIGS. 1-8 , the present invention provides a device for detecting thermal resistance and heat transfer coefficient of building wall materials, comprising a hot box 100, a test piece frame 200, and a cold box 300 which are arranged from left to right in sequence. The hot box 100, the test piece frame 200, and the cold box 300 are connected in sequence.
所述热箱100的内部设置有用于将待测建筑墙体材料加热的热源件，The heat box 100 is provided with a heat source for heating the building wall material to be tested.
所述试件框200用于放置待测建筑墙体材料，The test piece frame 200 is used to place the building wall material to be tested.
所述冷箱300的内部设置有用于将待测建筑墙体材料制冷的制冷件，The cold box 300 is provided with a refrigeration element for cooling the building wall material to be tested.
其中，所述热箱100、冷箱300将试件框200夹合，而后对试件框200内的待测建筑墙体材料两侧进行加热、制冷形成温差。The hot box 100 and the cold box 300 clamp the test piece frame 200, and then heat and cool the two sides of the building wall material to be tested in the test piece frame 200 to form a temperature difference.
进一步的所述热源件包括计量箱101，所述计量箱101的下部设置有滚轮102，位于所述热箱100的内部设置有用于滚轮102移动的滑道103，以使计量箱101在热箱100内部滑移。The heat source further comprises a metering box 101 , a roller 102 is arranged at the lower part of the metering box 101 , and a slideway 103 for moving the roller 102 is arranged inside the heat box 100 so that the metering box 101 can slide inside the heat box 100 .
进一步的所述计量箱101的上部开设有多组导向孔101a，多组所述导向孔101a的内部设置有导向杆104，所述导向杆104的端部与热箱100内壁相连，以使计量箱101通过导向杆104导向移动。Furthermore, a plurality of guide holes 101 a are provided on the upper portion of the metering box 101 , and guide rods 104 are provided inside the plurality of guide holes 101 a . The ends of the guide rods 104 are connected to the inner wall of the heat box 100 , so that the metering box 101 is guided and moved by the guide rods 104 .
进一步的所述计量箱101为凹槽状设置，位于所述计量箱101的开口侧铰接有第一导流屏105，所述第一导流屏105的两侧分别设置有多组用于检测计量箱101內环境温度、待测建筑墙体材料位于热箱100侧温度的第一环境温度传感器106、第一表面温度传感器107。Furthermore, the meter box 101 is arranged in a groove shape, and a first guide screen 105 is hingedly connected to the opening side of the meter box 101. On both sides of the first guide screen 105, there are respectively arranged a plurality of first ambient temperature sensors 106 and first surface temperature sensors 107 for detecting the ambient temperature inside the meter box 101 and the temperature of the building wall material to be tested on the side of the hot box 100.
进一步的位于所述计量箱101内壁均贴附有多组用于检测通过计量箱101壁热流密度的热流板108。Furthermore, a plurality of heat flux plates 108 for detecting the heat flux density passing through the wall of the metering box 101 are attached to the inner wall of the metering box 101 .
进一步的所述计量箱101、热箱100的内部均设置有加热器109，位于所述计量箱101、热箱100的内壁设置有多组轴流风机110，位于所述计量箱101、热箱100内的轴流风机110风向相反，且位于所述计量箱101内部的轴流风机110风向向下。Furthermore, a heater 109 is provided inside the metering box 101 and the hot box 100, and a plurality of axial flow fans 110 are provided on the inner walls of the metering box 101 and the hot box 100. The wind directions of the axial flow fans 110 inside the metering box 101 and the hot box 100 are opposite, and the wind direction of the axial flow fan 110 inside the metering box 101 is downward.
进一步的所述制冷件包括设置于冷箱300内的风幕机301，位于所述风幕机301的正下方设置有蒸发器302；Further, the refrigeration component includes an air curtain machine 301 disposed in the cold box 300, and an evaporator 302 is disposed directly below the air curtain machine 301;
位于所述冷箱300内铰接有第二导流屏303，位于所述第二导流屏303的两侧分别设置有多组用于检测冷箱300內环境温度、待测建筑墙体材料位于冷箱300侧温度的第二环境温度传感器304、第二表面温度传感器305。A second guide screen 303 is hingedly disposed inside the cold box 300, and multiple sets of second ambient temperature sensors 304 and second surface temperature sensors 305 are disposed on both sides of the second guide screen 303 for detecting the ambient temperature inside the cold box 300 and the temperature of the building wall material to be tested on the side of the cold box 300.
进一步的所述热箱100、试件框200、冷箱300的下部均设置有承载板400，所述承载板400的四周设置有用于移动的万向轮。Furthermore, a carrying plate 400 is disposed at the bottom of the hot box 100 , the specimen frame 200 , and the cold box 300 , and universal wheels for movement are disposed around the carrying plate 400 .
进一步的位于所述冷箱300处的承载板400上还设置有控制柜500，所述控制柜500侧设置有压缩机600。Furthermore, a control cabinet 500 is disposed on the carrier plate 400 located at the cold box 300 , and a compressor 600 is disposed on the side of the control cabinet 500 .
一种建筑墙体材料热阻、传热系数检测装置的检测方法，包括以下步骤：A detection method for a thermal resistance and heat transfer coefficient detection device of a building wall material comprises the following steps:
步骤A、将待测建筑墙体材料安装在试件框200内并进行养护；Step A, installing the building wall material to be tested in the test piece frame 200 and performing maintenance;
步骤B、养护期满后，推动计量箱101，控制计量箱101通过滚轮102在滑道103内部移动，同时计量箱101导向孔101a顺沿导向杆104移动，直至第一导流屏105侧的第一表面温度传感器107移出；Step B: After the maintenance period expires, the metering box 101 is pushed and controlled to move inside the slideway 103 through the roller 102, and at the same time, the guide hole 101a of the metering box 101 moves along the guide rod 104 until the first surface temperature sensor 107 on the side of the first guide screen 105 is moved out;
步骤C、通过万向轮移动位于热箱100、试件框200、冷箱300下部的承载板400，直至将冷箱300、热箱100扣合在试件框200上，计量箱101、冷箱300内置的第一表面温度传感器107、第二表面温度传感器305分别顶触至待测建筑墙体材料的热侧、冷侧，关闭外部锁扣使冷箱300、热箱100、试件框200之间密闭严实；Step C, moving the bearing plate 400 located at the bottom of the hot box 100, the specimen frame 200, and the cold box 300 by universal wheels until the cold box 300 and the hot box 100 are buckled on the specimen frame 200, the first surface temperature sensor 107 and the second surface temperature sensor 305 built in the metering box 101 and the cold box 300 are respectively in contact with the hot side and the cold side of the building wall material to be tested, and closing the external lock to make the cold box 300, the hot box 100, and the specimen frame 200 tightly sealed;
步骤D、启动冷箱300侧的压缩机600和风幕机301，同时启动热箱100、计量箱101内的加热器109和轴流风机110，控制柜500通过第一环境温度传感器106、第二环境温度传感器304设置冷箱300、热箱100、计量箱101内部的环境温度，设置巡检周期15s～30s，依据巡检周期记录第一表面温度传感器107、第二表面温度传感器305和热流板108的数值分别为Tsi、Tse和qi；Step D, start the compressor 600 and the air curtain machine 301 on the cold box 300 side, and start the heater 109 and the axial flow fan 110 in the hot box 100 and the metering box 101 at the same time. The control cabinet 500 sets the ambient temperature inside the cold box 300, the hot box 100 and the metering box 101 through the first ambient temperature sensor 106 and the second ambient temperature sensor 304, sets the inspection cycle to 15s to 30s, and records the values of the first surface temperature sensor 107, the second surface temperature sensor 305 and the heat flow plate 108 as T si , T se and qi respectively according to the inspection cycle;
步骤E、待第一表面温度传感器107、第二表面温度传感器305记录数值达到稳定传热状态后，选择每30min分钟的测试数据，设定在稳态条件下3h后停机；Step E: After the values recorded by the first surface temperature sensor 107 and the second surface temperature sensor 305 reach a stable heat transfer state, select test data every 30 minutes and set the machine to shut down after 3 hours under steady-state conditions;
步骤F、依据步骤E中得到的测试数据，对于每支温度传感器和热流板108，算取各自6个实测值的平均值做为该参数的最终试验数据，得出Tsi、Tse和qi；Step F: Based on the test data obtained in step E, for each temperature sensor and heat flux plate 108, the average of the six measured values is calculated as the final test data of the parameter, and T si , T se and qi are obtained;
步骤F、计算待测建筑墙体材料的传热系数K值和热阻R值，公式如下；Step F, calculating the heat transfer coefficient K value and thermal resistance R value of the building wall material to be tested, the formula is as follows;
其中，R为待测建筑墙体材料热阻，单位为m2·K/W；Where R is the thermal resistance of the building wall material to be tested, in units of m 2 ·K/W;
A为垂直于热流的面积，单位为m2；A is the area perpendicular to the heat flow, in m 2 ;
Tsi、Tse为待测建筑墙体材料热侧、冷侧表面温度，单位为℃；T si and T se are the surface temperatures of the hot and cold sides of the building wall material to be tested, in °C;
为通过待测建筑墙体材料的热流量，单位为W； is the heat flow through the building wall material to be tested, in W;
Tni、Tne为待测建筑墙体材料位于热箱侧、冷箱侧环境温度，单位为℃；T ni and T ne are the ambient temperatures of the building wall materials to be tested on the hot box side and the cold box side, in °C;
为计量箱内加热器功率，单位为W； It is the power of the heater in the metering box, in W;
为平行于待测建筑墙体材料的不平衡热流量，单位为W，达到稳态时 is the unbalanced heat flow parallel to the building wall material to be tested, in W, when it reaches steady state
为通过计量箱101壁的热流量，单位为W； is the heat flow through the wall of the metering box 101, in W;
为通过计量箱101第i面的热量，单位为W； is the amount of heat passing through the i-th surface of the metering box 101, in W;
qi为计量箱101第i面的热流密度，单位为W/m2； qi is the heat flux density of the i-th surface of the metering box 101, in W/m 2 ;
A3i为计量箱101第i面的面积，单位为m2。A 3i is the area of the i-th surface of the metering box 101, and the unit is m 2 .
本发明的一种建筑墙体材料热阻、传热系数检测装置及其检测方法，具有以下优点：The device and method for detecting thermal resistance and heat transfer coefficient of building wall materials of the present invention have the following advantages:
本发明通过设置的热箱、冷箱和试件框，可对待测建筑墙体材料的测试周期缩短，装置中的冷、热箱通过密封衬垫实现密闭，箱体扣合并提供稳定的温度环境，使得待测建筑墙体材料能够在较短的时间内达到稳态。相比传统热流计法的长周期测试(通常为5到7天)，密闭箱体可以防止外界环境对试件(待测建筑墙体材料)的影响，使得试验过程中的温度变化主要受到装置控制，消除了待测建筑墙体材料响应时间的影响，可以显著减少测试时间，提高效率。The present invention can shorten the test cycle of the building wall material to be tested by setting up a hot box, a cold box and a test piece frame. The cold and hot boxes in the device are sealed by sealing gaskets, and the box body is buckled and provides a stable temperature environment, so that the building wall material to be tested can reach a steady state in a shorter time. Compared with the long-cycle test of the traditional heat flux meter method (usually 5 to 7 days), the closed box body can prevent the influence of the external environment on the test piece (building wall material to be tested), so that the temperature change during the test is mainly controlled by the device, eliminating the influence of the response time of the building wall material to be tested, and can significantly reduce the test time and improve efficiency.
同时将待测建筑墙体材料置于试验室标准条件下养护，并且养护周期固定，消除了受室外天气条件波动的影响。待测建筑墙体材料在相同的养护周期内被测试，使得测试数据具有可比性。这样一来，无需进行复杂的预处理和筛选工作，可以直接使用获得的稳态数据进行分析和计算，简化了数据处理过程。At the same time, the building wall materials to be tested are placed in the laboratory for curing under standard conditions, and the curing cycle is fixed, eliminating the influence of fluctuations in outdoor weather conditions. The building wall materials to be tested are tested within the same curing cycle, making the test data comparable. In this way, there is no need for complex preprocessing and screening work, and the obtained steady-state data can be directly used for analysis and calculation, simplifying the data processing process.
墙体材料热阻、传热系数检测装置中的计算公式被设计为同时包含热阻R和传热系数K的表达方式。具体结构中的计算公式中包含试件(待测建筑墙体材料)的尺寸、温度差、试验室条件等参数。通过测量试件的输入功率和温度差，可以直接计算得出热阻和传热系数的值。这样一来，可以更全面地评估试件的传热性能，提供了热阻和传热系数的综合结果表达。The calculation formula in the wall material thermal resistance and heat transfer coefficient detection device is designed to include the expression of thermal resistance R and heat transfer coefficient K at the same time. The calculation formula in the specific structure includes parameters such as the size of the test piece (building wall material to be tested), temperature difference, and laboratory conditions. By measuring the input power and temperature difference of the test piece, the value of thermal resistance and heat transfer coefficient can be directly calculated. In this way, the heat transfer performance of the test piece can be evaluated more comprehensively, providing a comprehensive result expression of thermal resistance and heat transfer coefficient.
装置中的结构设计通过控制能量的传导，可以准确测量试件的输入功率和温度差。通过精确测量这些参数，并将其应用于计算公式中，可以获得准确的热阻和传热系数值。试验室条件的控制也有助于确保温度差的稳定性和精确性。参数测量和控制能够产生更可靠和准确的结果。The structural design in the device can accurately measure the input power and temperature difference of the test piece by controlling the conduction of energy. By accurately measuring these parameters and applying them to the calculation formula, accurate values of thermal resistance and heat transfer coefficient can be obtained. Control of test room conditions also helps to ensure the stability and accuracy of temperature difference. Parameter measurement and control can produce more reliable and accurate results.
墙体材料热阻、传热系数检测装置中，具备热流密度的测量功能。通过测量热流密度q，可以直接获取热量的输入功率。这样避免了传统热流计法中使用的热流系数M与温差Δθ相乘的方法，消除了热流系数的不确定度。消除了标定热箱法和防护热箱法中关于热流系数的局限性。The wall material thermal resistance and heat transfer coefficient detection device has the function of measuring heat flux density. By measuring the heat flux density q, the input power of heat can be directly obtained. This avoids the method of multiplying the heat flux coefficient M and the temperature difference Δθ used in the traditional heat flow meter method, eliminating the uncertainty of the heat flux coefficient. It eliminates the limitations of the heat flux coefficient in the calibration hot box method and the protective hot box method.
本发明中的具体结构设计和测量方法提供了更稳定和可靠的操作环境和数据采集，从而增加了结果的可靠性。通过密闭箱体结构和精确的热流密度测量，可以减少外界干扰因素对结果的影响，并提供更可信赖的计算结果。The specific structural design and measurement method of the present invention provide a more stable and reliable operating environment and data collection, thereby increasing the reliability of the results. Through the closed box structure and accurate heat flux density measurement, the influence of external interference factors on the results can be reduced, and more reliable calculation results can be provided.
尽管已经示出和描述了本发明的发明，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些发明进行多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同物限定。While the invention has been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made thereto without departing from the principles and spirit of the invention, the scope of the invention being defined by the appended claims and their equivalents.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411023277.6A CN118759000A (en) | 2024-07-29 | 2024-07-29 | A device and method for detecting thermal resistance and heat transfer coefficient of building wall materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411023277.6A CN118759000A (en) | 2024-07-29 | 2024-07-29 | A device and method for detecting thermal resistance and heat transfer coefficient of building wall materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118759000A true CN118759000A (en) | 2024-10-11 |
Family
ID=92948642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411023277.6A Pending CN118759000A (en) | 2024-07-29 | 2024-07-29 | A device and method for detecting thermal resistance and heat transfer coefficient of building wall materials |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118759000A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119666924A (en) * | 2025-02-21 | 2025-03-21 | 长安大学 | A device and method for detecting heat transfer performance of three-dimensional building space enclosure |
-
2024
- 2024-07-29 CN CN202411023277.6A patent/CN118759000A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119666924A (en) * | 2025-02-21 | 2025-03-21 | 长安大学 | A device and method for detecting heat transfer performance of three-dimensional building space enclosure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103076359B (en) | Device for detecting heat transfer coefficient of building enclosing structure on site | |
| CN104237305B (en) | A kind of rock mass testing device for measuring thermal conductivity and test system | |
| CN100523797C (en) | In site detecting method for building wall heat transfer coefficient | |
| CN201464397U (en) | On-site detection device for heat transfer coefficient of building envelope | |
| Gao et al. | A study on thermal performance of a novel glazed transpired solar collector with perforating corrugated plate | |
| CN118759000A (en) | A device and method for detecting thermal resistance and heat transfer coefficient of building wall materials | |
| CN203465227U (en) | Heat-preserving performance detecting system for building doors and windows | |
| CN200953005Y (en) | Apparatus for detecting thermal resistance/heat transfer coefficient of blocks | |
| CN112229869B (en) | A device and method for testing thermal resistance of building wall on site | |
| CN103134828A (en) | Synchronization testing device and testing method of thermal barrier performance and thermal shock performance of thermal barrier coating | |
| CN102628818A (en) | Thermal conduction coefficient tester for single-plate guarded thermal plate method with automatic pressure regulator and thickness measuring device | |
| CN110779748B (en) | Multi-temperature-zone transport refrigeration unit performance test device and test method | |
| WO2020186539A1 (en) | Product performance test method and system | |
| CN102253076A (en) | Apparatus and method for testing thermal insulated and flame retardant material | |
| CN203798759U (en) | Glass thermophysical property tester | |
| CN111830080B (en) | Precise heat insulation calorimeter and heat metering method thereof | |
| CN100456030C (en) | Hot and cold box heat transfer coefficient detector | |
| CN102778473A (en) | Field detection method for thermal resistance of building envelope | |
| CN101308045A (en) | Simulation temperature measurement method and device for rubber tire | |
| CN116718633A (en) | A soft measurement intelligent detection system and method for thermal insulation performance of thermal insulation materials | |
| CN119147576A (en) | Device and method for testing energy saving rate and comfort level of phase-change energy storage wall | |
| CN212060004U (en) | Device for dynamically testing thermal performance of building wall | |
| CN201188038Y (en) | System for detecting heat dissipating capacity of heating radiator | |
| CN206114570U (en) | Envelope synthesizes on --spot detecting system of thermal property | |
| CN111948257A (en) | A test method for the temperature regulation performance of phase change energy storage building materials and components close to the actual use state |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |