CN108709477B - method for testing and calculating window gap size - Google Patents
method for testing and calculating window gap size Download PDFInfo
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- CN108709477B CN108709477B CN201810053072.0A CN201810053072A CN108709477B CN 108709477 B CN108709477 B CN 108709477B CN 201810053072 A CN201810053072 A CN 201810053072A CN 108709477 B CN108709477 B CN 108709477B
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- window
- window gap
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B13/00—Measuring arrangements characterised by the use of fluids
- G01B13/02—Measuring arrangements characterised by the use of fluids for measuring length, width or thickness
- G01B13/06—Measuring arrangements characterised by the use of fluids for measuring length, width or thickness for measuring thickness
- G01B13/065—Height gauges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/18—Measuring arrangements characterised by the use of mechanical techniques for measuring depth
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Measuring Arrangements Characterized By The Use Of Fluids (AREA)
Abstract
The invention relates to a method for testing and calculating window gap size, which comprises the steps of calculating a relational expression of a gap height h of a window according to a certain relation between the window gap size and the permeation air quantity passing through the window gap and the pressure difference at two sides of the window, simplifying and solving the relational expression of the calculated gap height h, the permeation air quantity Q passing through the window gap, the pressure difference delta p at two sides of the window, the length L and the depth Z of the window gap, and substituting the measured values into the expression of the window gap height to calculate the gap height h of the window.
Description
Technical Field
The invention relates to the field of building environment and energy conservation, in particular to a method for testing and calculating window gap size.
Background
In the current society, building energy consumption is more and more big, energy-saving test is aroused along with this, and it is one of them content to measure window gap height, and the gap height is difficult to be measured in the practical application, and the window gap height is obtained according to door and window gap effective area coefficient Ce and relevant formula indirect calculation in the relevant manual abroad. However, China has no relevant manual for calculating the height and the size of the window gap, the window processing quality is also very different, and the data in the foreign manual is adopted, so that great errors can be brought.
Disclosure of Invention
The invention provides a method for testing and calculating the size of a window gap, which aims at solving the problem that the size of the window gap is difficult to measure in practical engineering.
the technical scheme of the invention is as follows: a window gap size testing and calculating method specifically comprises the following steps:
1) If the air quantity permeating through the window gap of the measured room is a steady state value, measuring the air quantity permeating through the window gap by adopting a trace gas concentration attenuation method, opening a trace gas instrument, connecting the trace gas instrument to computer software, arranging measuring points, connecting one end of a leather hose to the trace gas instrument, arranging the other end of the leather hose at the central position of the room, then releasing a certain amount of trace gas, starting a fan to stir the indoor gas uniformly, closing the fan after a period of time, sealing the room to remove all gaps of the window gap to be measured, starting the test, stopping the test after the concentration of the indoor trace gas is reduced to a specified concentration, processing data on the computer software, and calculating the air quantity Q permeating through the window gap;
2) If the air quantity permeating through the window gap of the measured room is an unsteady value, measuring the air quantity permeating through the window gap by adopting a trace gas constant concentration method, namely sealing the room to remove all gaps of the window gap to be measured, opening a trace gas instrument, connecting the trace gas instrument to computer software, connecting a gas acquisition port of the trace gas instrument with a steel cylinder filled with trace gas by using a leather hose, then arranging a measuring point, opening a valve of the steel cylinder, starting the test, testing for a period of time, stopping the test, obtaining a weighted average value of the air quantity permeating through the window gap at each moment measured by the test in the period of time, wherein the weighted average value is the average air quantity permeating through the window gap in the period of time;
3) Adopting an atmospheric pressure sensor to measure the pressure difference at two sides of the window, namely arranging the atmospheric pressure sensor at one side of an indoor window, connecting one end of a leather hose to the atmospheric pressure sensor, and connecting the other end of the leather hose to the outside, thus constantly recording the pressure difference at two sides of the window, and after the experiment is finished, exporting data in the atmospheric pressure sensor to a computer to obtain the arithmetic average pressure difference delta P at two sides of the window during the experiment;
4) measuring the length L and the depth Z of the window gap by using a measuring tape;
5) Substituting the permeation air quantity Q measured in the step 1 or 2), the average pressure difference delta P measured in the step 3) and the L and Z measured in the step 4) into an expression h of the window gap height, namely h 1 + h 2, solving the window gap height h,
h1＝{6uzQ/ΔPL+[6uzQ/ΔPL)2-(CρQ/6L2ΔP)3]1/2}1/3
h2＝{6uzQ/ΔPL-[6uzQ/ΔPL)2-(CρQ/6L2ΔP)3]1/2}1/3
Wherein u is the aerodynamic viscosity; c is 1.5+ n, and n is the number of right angle bends of the window gap; ρ is the air density.
The invention has the beneficial effects that: the method for testing and calculating the size of the window gap makes up the defect of inaccurate gap height measurement in the engineering, and facilitates the measurement of the actual engineering.
Drawings
FIG. 1 is a schematic diagram of a trace gas concentration decay method measurement according to the present invention;
FIG. 2 is a schematic diagram of the trace gas constant concentration method measurement of the present invention.
Detailed Description
because the size of the window gap and the amount of the air permeating through the window gap and the pressure difference on two sides of the window have a certain relation, the calculation of the gap height h and the relation of the amount of the air permeating Q through the window gap and the pressure difference delta p on two sides of the window are simplified and solved to obtain the calculation expression relation of the window gap height h, then the amount of the air permeating Q through the window gap, the pressure difference delta p on two sides of the window, the length L and the depth Z of the window gap are respectively measured and substituted into the expression of the window gap height to obtain the gap height h of the window.
Firstly, calculating the permeation air quantity Q passing through a window gap by a trace gas concentration attenuation method or a trace gas constant concentration method; then, an atmospheric pressure sensor is adopted to measure the differential pressure delta P at two ends of the window, namely, the atmospheric pressure sensor is arranged on one side of an indoor window, one end of a leather hose is connected to the atmospheric pressure sensor, the other end of the leather hose is connected to the outside of the room, thus the differential pressure at two sides of the window can be recorded constantly, after the experiment is finished, the data in the atmospheric pressure sensor is led out to a computer, and the average differential pressure delta P at two sides of the window during the experiment is obtained; finally, measuring the length L and the depth Z of the window gap by using a tape measure, substituting the permeation air quantity Q passing through the window gap, the pressure difference delta P on two sides of the window, the length L and the depth Z of the window gap into a calculation expression of the height of the window gap to obtain a height value of the window gap
A method for testing and calculating the size of window gap features that the experimental instruments used for the method include trace gas analyzer, trace gas sampler, barometric pressure sensor and measuring tape. The permeation air quantity passing through the window gap in the room is measured by using a trace gas concentration attenuation method or a trace gas constant concentration method, if the air quantity permeating through the window gap of the room is a steady state value, the air quantity permeating through the window gap is measured by adopting a trace gas concentration attenuation method, as shown in fig. 1, the specific measurement procedure is such that the trace gas instrument is turned on, connected to the computer software, then arranging a measuring point, connecting one end of the leather hose to the instrument, arranging the other end of the leather hose at the center of the room, then, releasing a certain amount of tracer gas, starting a fan to stir indoor gas uniformly, closing the fan after a period of time, sealing the room to remove all gaps of the window to be tested, starting testing, stopping the experiment after the concentration of the indoor tracer gas is reduced to a specified concentration, processing data on computer software, and calculating the permeation air quantity Q passing through the gaps of the window;
If the air quantity permeating through the window gap of the room is an unsteady value, as shown in figure 2, the air quantity permeating through the window is measured by adopting a trace gas constant concentration method, namely, all gaps except the gap of the window to be measured in the sealed room are removed, a trace gas instrument is opened and connected to computer software, a gas collecting port of the trace gas instrument is connected with a steel cylinder filled with trace gas by a leather hose, then measuring points are arranged, a valve of the steel cylinder is opened, the test is carried out for a period of time, the experiment is stopped, the weighted average value of the air quantity permeating through the window gap at each moment measured by the experiment in the period of time is obtained, and the weighted average value is the average air quantity permeating through the window gap in the period of time Q.
Then, an atmospheric pressure sensor is adopted to measure the pressure difference of two sides of the window, namely, the atmospheric pressure sensor is arranged on one side of an indoor window, one end of a leather hose is connected to the atmospheric pressure sensor, the other end of the leather hose is connected to the outside of the room, thus the pressure difference of the two sides of the window can be recorded constantly, after the experiment is finished, the data in the atmospheric pressure sensor is led out to a computer, and the arithmetic mean pressure difference delta P of the two sides of the window during the experiment is obtained; measuring the length L and the depth Z of the window gap by using a measuring tape; and finally, solving the relational expression of the window gap height, the pressure difference between two sides of the window and the permeation air volume by using a corresponding formula to obtain an expression about the window gap height h (h ═ f (Q, delta P, L, Z)), and substituting the measured permeation air volume Q passing through the window gap, the atmospheric pressure difference delta P between two sides of the window, the length L and the depth Z of the window gap into the expression about the window gap height to obtain the actual height h of the window gap.
Calculating the expression h of the window gap height h, namely h 1 + h 2 (the expression of the window gap height h is too long, so the expression h is divided into two sections, namely h 1 and h 2), and substituting the parameters to solve the window gap height, wherein h 1 and h 2:
h1＝{6uzQ/ΔPL+[6uzQ/ΔPL)2-(CρQ/6L2ΔP)3]1/2}1/3 (1)
h2＝{6uzQ/ΔPL-[6uzQ/ΔPL)2-(CρQ/6L2ΔP)3]1/2}1/3 (2)
Where ρ represents the air density; u represents aerodynamic viscosity; c is 1.5+ n, where n represents the number of quarter-turns of a window slot.
Claims (1)
1. a window gap size testing and calculating method is characterized by comprising the following steps:
1) If the air quantity permeating through the window gap of the measured room is a steady state value, measuring the air quantity permeating through the window gap by adopting a trace gas concentration attenuation method, opening a trace gas instrument, connecting the trace gas instrument to computer software, arranging measuring points, connecting one end of a leather hose to the trace gas instrument, arranging the other end of the leather hose at the central position of the room, then releasing a certain amount of trace gas, starting a fan to stir the indoor gas uniformly, closing the fan after a period of time, sealing the room to remove all gaps of the window gap to be measured, starting the test, stopping the test after the concentration of the indoor trace gas is reduced to a specified concentration, processing data on the computer software, and calculating the air quantity Q permeating through the window gap;
2) If the air quantity permeating through the window gap of the measured room is an unsteady value, measuring the air quantity permeating through the window gap by adopting a trace gas constant concentration method, namely sealing the room to remove all gaps of the window gap to be measured, opening a trace gas instrument, connecting the trace gas instrument to computer software, connecting a gas acquisition port of the trace gas instrument with a steel cylinder filled with trace gas by using a leather hose, then arranging a measuring point, opening a valve of the steel cylinder, starting the test, testing for a period of time, stopping the test, obtaining a weighted average value of the air quantity permeating through the window gap at each moment measured by the test in the period of time, wherein the weighted average value is the average air quantity permeating through the window gap in the period of time;
3) adopting an atmospheric pressure sensor to measure the pressure difference at two sides of the window, namely arranging the atmospheric pressure sensor at one side of an indoor window, connecting one end of a leather hose to the atmospheric pressure sensor, and connecting the other end of the leather hose to the outside, thus constantly recording the pressure difference at two sides of the window, and after the experiment is finished, exporting data in the atmospheric pressure sensor to a computer to obtain the arithmetic average pressure difference delta P at two sides of the window during the experiment;
4) Measuring the length L and the depth Z of the window gap by using a measuring tape;
5) substituting the permeation air quantity Q measured in the step 1 or 2), the average pressure difference delta P measured in the step 3) and the L and Z measured in the step 4) into an expression h of the window gap height, namely h 1 + h 2, solving the window gap height h,
h1＝{6uZQ/ΔPL+[(6uZQ/ΔPL)2-(CρQ/6L2ΔP)3]1/2}1/3
h2＝{6uZQ/ΔPL-[(6uZQ/ΔPL)2-(CρQ/6L2ΔP)3]1/2}1/3
Wherein u is the aerodynamic viscosity; c is 1.5+ n, and n is the number of right angle bends of the window gap; ρ is the air density.
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| CN201810053072.0A CN108709477B (en) | 2018-01-19 | 2018-01-19 | method for testing and calculating window gap size |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US2991558A (en) * | 1958-07-31 | 1961-07-11 | Pratt & Whitney Co Inc | Air gage cartridge |
| JPH1151628A (en) * | 1997-08-08 | 1999-02-26 | Randotetsuku:Kk | Height measuring instrument for industrial machine |
| KR100592734B1 (en) * | 2005-10-27 | 2006-06-28 | 주식회사 영화종합기술단건축사사무소 | Crack measuring device of construction |
| CN101285679B (en) * | 2008-06-05 | 2010-06-30 | 北京市市政工程研究院 | Crack depth test method and device |
| CN101858868B (en) * | 2010-05-20 | 2012-01-25 | 同济大学 | Method and device for testing distress in concrete |
| CN202108497U (en) * | 2011-05-24 | 2012-01-11 | 山东科技大学 | Height detection controller for fracture zone |
| CN105137502B (en) * | 2015-06-25 | 2017-05-24 | 山东科技大学 | Segmental observation system for growth height of top-board water guiding fissure zone |
| CN105136072B (en) * | 2015-08-27 | 2017-10-31 | 长安大学 | A kind of Tunnel Lining Cracks depth measurement method and measurement apparatus |
| CN204963835U (en) * | 2015-10-09 | 2016-01-13 | 北京智博联科技股份有限公司 | Crack depth automatic checkout device |
| CN105843992A (en) * | 2016-03-17 | 2016-08-10 | 成都创源油气技术开发有限公司 | Shale gas numerical simulation method based on fracture network system and percolation characteristics |
| CN206648617U (en) * | 2017-01-22 | 2017-11-17 | 北京市华清地热开发集团有限公司 | A kind of ground buried pipe of ground source heat pump down tube depth measurement device |
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