CN100456030C - Cold-hot box type heat transfer coefficient detecting instrument - Google Patents

Cold-hot box type heat transfer coefficient detecting instrument Download PDF

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Publication number
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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China
Prior art keywords
heat transfer
temperature
hot
ice chest
cold
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CN1815209A (en
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段恺
王志勇
蒋志强
王玉龙
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ZHONGJIAN ARCHITECTURE SCIENCE
China Construction First Group Corp Ltd
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China Construction First Group Corp Ltd
Beijing Building Research Institute Corp Ltd of CSCEC
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  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

The present invention relates to a cold-hot box type detecting instrument for heat transfer coefficients, which is an energy-saving on-site detecting device for construction and is used for detecting heat transfer coefficients of enclosure structures for buildings. The detecting instrument comprises a hot box, a cold box, a control instrument, a refrigerating machine, a heating device, etc., and solves the problems that (1) the enclosure structures for buildings are not detected on site at all seasons; (2) the air temperature in the hot box is not synchronized with the air temperature in a room so that the error of detecting results is large; (3) the air temperature in the hot box is not precisely controlled; (4) the anti-interference capability of the instrument is not enhanced. The solving proposal: (1) the cold box is used for reducing outdoor detecting air temperature; (2) high precision temperature sensors with the same error are used; (3) a PID temperature control regulating system is used by a temperature control system of the hot box, the rule operation is blurred, and a high-speed high-resolution conversion device is used as a power-consumption counting device; (4) a module structure is used by the system design to strengthen and weaken electricity separation.

Description

Cold-hot box type heat transfer coefficient detecting instrument
One, technical field
It is the important content of building energy conservation test that building enclosure structure heat transfer coefficient detects, and by the heat transfer capacity of measuring unit's area building enclosure and the air temperature difference inside and outside the hot case, records the heat transfer coefficient of building enclosure.Cold-hot box type heat transfer coefficient detecting instrument is with the outside various inputs of Single-chip Controlling, output signal, thereof using PID, and digital filtering technique has improved the reliability of system.Testing process need not on duty, preserves the overall process measurement result automatically; Other has communication interface measurement result can be uploaded to computing machine, is convenient to data processing and preservation.
This instrument is applicable to the on-the-spot energy-conservation detection of buildings exterior-protected structure, has realized not being subjected to the on-the-spot enclosure structure heat transfer coefficient of heating time limit system to detect.
Two, background technology
Universal with the technology of hot case method test architecture member heat transfer coefficient both at home and abroad at present, but hot case method is applied to not being reported of on-the-spot test enclosure structure heat transfer coefficient.Be used at present the on-the-spot technology that detects of energy saving building both at home and abroad and mainly contain heat flow meter method and infrared thermal imagery method, heat flow meter method on-the-spot test enclosure structure heat transfer coefficient must carry out the coldest month of heating phase, and each heat flow meter test is a point, effectively working area is little, and accuracy of measurement is poor; The infrared thermal imagery method must be under the indoor situation that thermal source arranged the thermal property of test architecture thing, and the result of test is thermal defects, i.e. the defectiveness that the insulation at which position is done can not carry out quantitative measurment to the thermal property of building enclosure.
Cold-hot box type heat transfer coefficient detecting instrument has been realized not being subject to seasonal restrictions substantially, and the heat transfer coefficient at tested position is carried out quantitative test.
Three, summary of the invention
Hot case method detects the principle that enclosure structure heat transfer coefficient is based on " one dimensional heat transfer ": promptly the tested position of building enclosure has two substantially parallel surfaces, and its length and width are far longer than its thickness, is considered as infinitely great dull and stereotyped.Make under the one dimensional heat transfer environment artificial, the inboard at tested position is with hot case simulation heating building indoor conditions, and makes in the hot case and be consistent with indoor air temperature, and opposite side is outdoor natural conditions or ice chest.Maintaining heat the temperature inside the box is higher than outdoor temperature all the time, the heat that makes tested position always from indoor to outdoor transmission, formed one dimensional heat transfer, when adding heat in the hot case and reach balance with the heat that transmits by tested position, hot case add the heat transfer capacity that heat is exactly tested position.Obtain the heat transfer coefficient value at tested position through computing.
Simultaneously for avoiding interference, make the test data of building enclosure more level off to actual conditions, the data of all collections all can be converted into the Excel form at last, make things convenient for the testing staff by computer measured data to be analyzed.The parts that detector comprises have:
1, hot case: aperture area is greater than 0.2m 2, the outer wall thermal resistance value should be greater than 0.5m 2K/W, heating power is greater than 20W.
2, ice chest: aperture area is greater than 0.3m 2, the outer wall thermal resistance value should be greater than 0.5m 2K/W.
3, refrigeration machine: refrigeration work consumption is greater than 50W.
4, control box: mainly be used for gathering each point temperature, hot case power equivalent and control, computing, storage.
5, temperature sensor: adopt platinum resistance temperature sensor or thermopair.
6, indoor heating controller.
7, household heater.
8, vaulting pole.
9, test software, interface line, switching software.
Four, description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
A-building enclosure 1 among the figure, b-well heater, the indoor heating controller of c-, the water-bath of d-ice chest, e-building enclosure 2, f-controller.
T 1-A case outside air temperature, T 2The outdoor wall table of-A case temperature, T 3Air themperature in the-A case case, T 4The indoor wall table of-A case temperature, T 5-Nei air themperature, T 6Air themperature in the-B case case, T 7The indoor wall table of-B case temperature, T 8-B case outside air temperature, T 9The outdoor wall table of-B case temperature.
Five, embodiment
1, selected tested building enclosure is measured tested surface of wall Temperature Distribution with infrared thermometer, and the position of selecting uniformity of temperature profile is as the measured position.Fixed chamber interior wall table temperature sensor.The opening end of hot case is abutted against the measured position, for reaching airtight, should be at the hot case back side with jail, strut top.Confirm airtight.
2, fixed chamber exterior wall table temperature sensor is located at the center of relatively hot case, is close to the wall table, and sensor end is blocked with tinfoil, keeps out of the direct sun; When outdoor temperature is higher, use ice chest simulating chamber external environment condition, make the interior temperature of ice chest be lower than indoor control temperature; Fixed chamber outer air temperature sensor leaves under the shade of wall table 10~20cm, and radiation shield is installed.Fixing room air temperature sensor is located at tested room central authorities, apart from ground 1.5m place, and radiation shield is installed.
3, connect each temperature probe, controller and hot case etc.
4, the relevant position that hot case heating plug is inserted instrument container
5, heating electric heater in the junction chamber.
6, turn on the power switch, System self-test is operated according to screen display.
7, test automatically.
8, detection is finished with computer acquisition and arrangement.
9, by garbled data, reject underproof data item, can calculate the Coefficient K value of tested building enclosure.
10, preserve data file, generate 2 files, raw data file can not be revised, and another file can carry out data processing with EXCEL.

Claims (2)

1, a kind of cold-hot box type heat transfer coefficient detecting instrument has the function of on-the-spot test enclosure structure heat transfer coefficient, it is characterized in that: at testee one side a hot case that provides one dimensional heat transfer to stablize thermal source is arranged; At another side ice chest of testee, the interior outside and the surfaces externally and internally of testee are evenly equipped with temperature sensor;
The cabinet wall of described hot case is furnished with hot case heating arrangement and heat-insulation layer, and temperature sensor probe is in hot case, and hot case links to each other with control box with electric heater;
Described ice chest cabinet wall is furnished with refrigerating plant and heat-insulation layer, and temperature sensor probe is in ice chest, and ice chest links to each other with refrigeration machine;
The thermal resistance of the tank wall of described hot case is greater than 0.5m 2K/W, aperture area is greater than 0.2m 2The thermal resistance of the tank wall of ice chest is greater than 0.5m 2K/W, aperture area is greater than 0.3m 2
2, cold-hot box type heat transfer coefficient detecting instrument according to claim 1, it is characterized in that: with hot case simulation indoor environment, it is consistent with indoor air temperature to control the interior air themperature of hot case, with the ice chest simulation outdoor temperature in winter, make indoor temperature and hot the temperature inside the box be higher than temperature in the ice chest all the time, make heat all the time from indoor to outdoor transmission.
CNB2005100048745A 2005-02-03 2005-02-03 Cold-hot box type heat transfer coefficient detecting instrument Active CN100456030C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2005100048745A CN100456030C (en) 2005-02-03 2005-02-03 Cold-hot box type heat transfer coefficient detecting instrument

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Application Number Priority Date Filing Date Title
CNB2005100048745A CN100456030C (en) 2005-02-03 2005-02-03 Cold-hot box type heat transfer coefficient detecting instrument

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CN1815209A CN1815209A (en) 2006-08-09
CN100456030C true CN100456030C (en) 2009-01-28

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101078699B (en) * 2007-06-26 2010-05-26 东南大学 Detection method for protecting integral heat-insulation property of 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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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 conducting heat insulation and heat transfer
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Owner name: ZHONGJIAN BUILDING SCIENCE & TECHNOLOGY INST., BE

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