CN101988731A - Air supply method of cylindrical surface wall attachment jet - Google Patents
Air supply method of cylindrical surface wall attachment jet Download PDFInfo
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- CN101988731A CN101988731A CN 201010548896 CN201010548896A CN101988731A CN 101988731 A CN101988731 A CN 101988731A CN 201010548896 CN201010548896 CN 201010548896 CN 201010548896 A CN201010548896 A CN 201010548896A CN 101988731 A CN101988731 A CN 101988731A
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Abstract
The invention discloses an air supply method of cylindrical surface wall attachment jet, which is characterized in that an annular static pressure box with an air inlet and an air supply outlet is arranged at the upper part of an indoor cylinder; the air supply outlet is an annular line diffuser; and the annular line diffuser supplies wind downward vertically and is attached to the outer surface of the cylinder. In the invention, the entrainment of supplied air to indoor air is reduced by utilizing an air supply mode of the cylindrical surface wall attachment jet to improve the air quality of the mixed top supplied air and the energy saving effect. When the air supply outlet and a cylindrical surface are nearer, the attachment effect of the cylindrical surface can be enhanced, the jet of the air supply outlet can deliver fresh air down to the ground, and an air pool phenomenon is formed in the bottom region in which indoor staffs move, and thereby, the effect which is similar to displacement ventilation in the aspects of air-flow organization, indoor temperature graded distribution and the like can be achieved. The invention is suitable for architectural environments with cylinder structures.
Description
Technical field
The present invention relates to a kind of air supply method, be specifically related to the air supply method of a kind of face of cylinder wall attachment jet, the bright indoor ventilation system that is applicable to of this method.
Background technology
The important step of room ventilation, air-conditioning system is exactly to inquire into the problem that adopts which kind of air-supply air current composition pattern, and the pattern of the air current composition of therefore blowing has been subjected to domestic and international researcher and project planner's attention.The pattern of air current composition is divided into two kinds: (1) ventilates based on the conventional hybrid of dilution principle; (2) be controlled to be the replacement aeration in modern age of power with buoyancy.
Traditional mixed ventilation is installed in top, room (Fig. 1) usually, and the characteristics of mixed ventilation are the big and turbulent flow air-supplies of speed height, momentum, because of easy arrangement on space, do not occupy bottom space (workspace), still are extensive use of so far.The workspace generally is in return air or the air draft environment, and drafting efficiency, sanitary condition are relatively poor relatively.
Replacement aeration can make space obtain air quality preferably, higher drafting efficiency, and can promote the thermal comfort in air conditioner zone.The underneath type replacement aeration is the replacement aeration form that summer air-conditioning is most widely used, air outlet is arranged in the bottom, room, air-flow slowly moves forward with the state of the piston flow of similar laminar flow, because wind pushing temperature is lower than indoor air temperature, air-supply spreads earlier under the gravity effect to whole floor surface, produce under the effect of entrainmenting of thermal convection current air-flow in follow-up air-supply promotion and indoor thermal source subsequently, flowing from the bottom to top forms the leading air-flow of room air motion, outdoor by the discharge of top, room at last.Because fresh clean air is directly sent into the workspace, earlier through human body, so just can guarantee that human body is in the air ambient that cleans relatively, thereby improved the air quality of workspace effectively, workspace, bottom, room temperature is near wind pushing temperature simultaneously, top nonclient area temperature is near temperature of outgoing air, so drafting efficiency is higher relatively.But in the practical application, tradition underneath type replacement aeration is in order to satisfy the requirement of comfortableness, the design wind pushing temperature can not be too low, wind speed be difficult for excessive (≤0.3m/s), thereby reduced the ability of eliminating the unit refrigeration duty to a certain extent, made it not be suitable for the bigger space of unit refrigeration duty.Replacement aeration adopts the air current composition mode of bottom side air-supply usually, and the bottom side air-supply is restricted under many circumstances, has hindered applying of replacement aeration to a certain extent.
Summary of the invention
The top air-supply of ventilating at conventional hybrid, thus air-supply entrainment a large amount of room airs and be difficult to satisfy people indoor environment and requirements of saving energy, the objective of the invention is to, the air supply method of a kind of face of cylinder wall attachment jet is provided.
In order to realize above-mentioned task, the present invention takes following technical solution:
The air supply method of a kind of face of cylinder wall attachment jet, it is characterized in that the annular plenum chamber that this method will have air inlet and air outlet is installed in indoor cylinder top, described air outlet is annular bar seam air port, this annular bar seam air port air-out is attached at the outer surface of cylinder vertically downward.
Method of the present invention is arranged in cylinder top with annular plenum chamber, and annular bar seam air port utilizes face of cylinder wall attachment jet air supply mode to reduce to blow entrainmenting of room air to be improved the air quality and the energy-saving effect of hybrid top air-supply.When the distance between the air outlet and the face of cylinder is very near, the attaching effect on the face of cylinder will be strengthened, the jet of air outlet can be delivered to ground with under the fresh air, form air pond phenomenon at the lower area of indoor occupant activity, can reach thus with replacement aeration in aspect similar effects such as air current composition and the distributions of indoor temperature gradient.Be applicable to the architectural environment of column structure.This air supply mode approaches the environment of blowing in the workspace when operation, help health, can improve the workspace comfort level; This air supply mode is directly delivered to the workspace with wind, reduces the air-conditioning calculated load, reaches energy-saving effect.
Description of drawings
Fig. 1 is the top portion ventilation schematic diagram that conventional hybrid is ventilated;
Fig. 2 is the air supply mode schematic diagram of face of cylinder wall attachment jet;
Fig. 3 is the air supply mode schematic diagram of single face of cylinder wall attachment jet;
Fig. 4 is the indoor velocity magnitude isopleth distribution map under embodiment 1 situation;
Below in conjunction with drawings and Examples the present invention is described in further detail.
The specific embodiment
As shown in Figure 2, the air supply method of the face of cylinder of the present invention wall attachment jet, the annular plenum chamber 2 that will have air inlet 1 and air outlet 3 is installed in indoor cylinder 4 tops, and air outlet 3 is annular bar seam air port, this annular bar seam air port air-out is attached at the outer surface of cylinder 4 vertically downward.
Clear is gone up on cylinder 4 surfaces, air outlet 3 on the annular plenum chamber 2 adopts annular bar seam air port and cylinder 4 surfaces to attach, can solve the disadvantage that the underneath type replacement aeration exists preferably, the air port air-out of annular bar seam vertically downward, rely on attaching effect---the Coanda effect (Coanda Effect) on cylinder 4 surfaces, prolong its range and reduce itself and the mixing of room air, fresh air is delivered to ground downwards to greatest extent from cylinder, and come along floor diffusion, the workspace form be similar to replacement aeration air current composition parameter field in, solved replacement aeration preferably because the air-supply air-flow directly blows human body and caused that to send into cold little, be subjected to problems such as room items putting position restriction.This air supply mode approaches the environment of blowing in the workspace when operation, help health, can improve the workspace comfort level; This air supply mode is directly delivered to the workspace with wind, reduces the air-conditioning calculated load, reaches energy-saving effect.
Referring to Fig. 3, can realize blowing and from top to bottom deliver to bottom the room along the face of cylinder in annular bar seam air port, make the air of sending into be deposited on room bottom and diffuse to form the air pond, thereby form the higher workspace of thermal comfort, reach air current composition effect, can improve the temperature of air-supply on the one hand, thereby improve the air quality in personnel activity zone near replacement aeration, reduce the air-conditioning calculated load, reach energy-saving effect.
Below be the embodiment that the inventor provides.
Embodiment 1:
Under the condition of clear on cylinder (4) surface, set up the numerical computations model of indoor cylinder 4 surperficial wall attachment jet draft types according to actual operating position, air outlet 3 is 3000mm apart from ground level; Cylinder 4 walls are close in annular bar seam air port, and air outlet 3 width are 100mm; Distance between air outlet 3 and the periphery is 100mm; Annular bar is stitched the air port air-out direction vertically downward, and air supply velocity is 1.5m/s;
For air-supply effect and the indoor air flows situation of verifying present embodiment, select the indoor gas maximum zero equation model of computing application that flows for use at this, it is as follows to set up the governing equation group:
In the formula:
t : the expression time;
: expression atmospheric density, kg/m
3 
: equal 1 for continuity equation, equal for the equation of momentum
(
=1,2 and 3, represent x, y and z direction respectively); Equal for energy equation
Equal for the component governing equation
: the expression cartesian coordinate (
=1,2 and 3, represent x, y and z direction respectively);
: the expression effective diffusion cofficient,
: the expression source item.
In each governing equation,
,
With
The content of expression is listed in the table 1.
Table 1
Adopt finite volume method that above-mentioned governing equation is dispersed, discrete scheme is selected the second order upstreame scheme for use, introduce the air-out boundary condition and also adopt the SIMPLE algorithm that discrete equation is found the solution, when speed term and pressure term residual values all less than 10
-3, the residual values of simultaneous temperature and component is all less than 10
-6The time, the convergence of governing equation group, can obtain the indoor air flows situation this moment.
Fig. 4 is the indoor velocity magnitude isopleth distribution map under embodiment 1 situation; Fig. 4 has shown the air-supply situation of the face of cylinder one side, and left margin is the wall of cylinder one side among the figure; Can see obviously that by figure exit flow along wall vertically downward, the attaching length that forms at wall is 260cm, the jet separation point is apart from model bottom 40cm, jet arrives the laggard capable secondary in ground and attaches, the working region is in the little air lake of wind speed, the air-supply efficient and the comfortableness of Ti Gaoing played energy-conservation and the good effect of sanitary condition greatly.
Embodiment 2:
Other are identical with embodiment 1, annular bar seam air outlet is close to the face of cylinder from face of cylinder distance for 0mm(), distance is become by the 100mm of example 1 and is close to the face of cylinder between the air outlet and the face of cylinder, calculate, distance reduce to have strengthened the attaching effect, prolonged attaching length, reduced jet and broken away from wall in advance and enter possibility that the workspace causes that blowing is done, the effect of blowing is than example 1 better.
Embodiment 3:
Other are identical with embodiment 1, and bar seam air port air-out speed is 3m/s.Calculate as drawing a conclusion: the air-supply effluxvelocity is big more, and attachment point is high more apart from ground, and easy more formation attaches; Otherwise the more little difficult more formation of jet distribution speed attaches, and showing should try one's best under the situation of conditions permit when adopting this invention draft type adopts bigger air supply velocity; After jet and wall formation attaching, the vertical speed decay diminishes, and shows that further the draft type that adopts this invention can reduce the decay of air supply velocity, helps air-supply.
Claims (2)
1. the air supply method of a face of cylinder wall attachment jet, it is characterized in that, the annular plenum chamber (2) that this method will have air inlet (1) and air outlet (3) is installed in indoor cylinder (4) top, described air outlet (3) is annular bar seam air port, this annular bar seam air port air-out is attached at the outer surface of cylinder (4) vertically downward.
2. the method for claim 1 is characterized in that, clear on described cylinder (4) surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010105488969A CN101988731B (en) | 2010-11-18 | 2010-11-18 | Air supply method of cylindrical surface wall attachment jet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105488969A CN101988731B (en) | 2010-11-18 | 2010-11-18 | Air supply method of cylindrical surface wall attachment jet |
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| CN101988731A true CN101988731A (en) | 2011-03-23 |
| CN101988731B CN101988731B (en) | 2012-08-08 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252393A (en) * | 2011-05-11 | 2011-11-23 | 西安建筑科技大学 | Attached type air supply method applicable for two side walls of capsule hotel |
| CN104930635A (en) * | 2015-05-20 | 2015-09-23 | 西安建筑科技大学 | Variable cross-section flow rectifier for square column wall surface attached type uniform air feeding |
| CN104990239A (en) * | 2015-05-20 | 2015-10-21 | 西安建筑科技大学 | Annular uniform cross-section flow equalizing apparatus for cylinder wall-attached air supply |
| CN105135586A (en) * | 2015-08-31 | 2015-12-09 | 西安建筑科技大学 | Ventilation device forming airflow organization of air pool, and control method of ventilation device |
| CN106524300A (en) * | 2015-09-10 | 2017-03-22 | 大金工业株式会社 | Air conditioner |
| CN108592189A (en) * | 2018-04-17 | 2018-09-28 | 中铁第四勘察设计院集团有限公司 | Wall attachment jet air-supply arrangement at a kind of arc column of combination fan coil |
| CN108917171A (en) * | 2018-08-07 | 2018-11-30 | 河南工业大学 | The heater for having air-cleaning function suitable for cylinder |
| CN109059273A (en) * | 2018-08-07 | 2018-12-21 | 河南工业大学 | The heater for having air-cleaning function suitable for polygon column |
| CN113446691A (en) * | 2021-07-30 | 2021-09-28 | 西安建筑科技大学 | Wall-attached air supply device with double flow guide plates and air supply method thereof |
| CN113446691B (en) * | 2021-07-30 | 2024-06-11 | 西安建筑科技大学 | Wall-attached air supply device with double guide plates and air supply method thereof |
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| US4876949A (en) * | 1988-04-18 | 1989-10-31 | Thermo-Aire Systems, Inc. | Low temperature air induction diffuser |
| CN101105329A (en) * | 2007-07-24 | 2008-01-16 | 西安交通大学 | Double side wall-attached jet air-supply style |
| CN101225988A (en) * | 2008-01-21 | 2008-07-23 | 西安建筑科技大学 | Ventilating system of vertical wall attaching jet air lake mode |
| JP2009243799A (en) * | 2008-03-31 | 2009-10-22 | Mitsubishi Electric Corp | Indoor unit for air conditioner |
-
2010
- 2010-11-18 CN CN2010105488969A patent/CN101988731B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4876949A (en) * | 1988-04-18 | 1989-10-31 | Thermo-Aire Systems, Inc. | Low temperature air induction diffuser |
| CN101105329A (en) * | 2007-07-24 | 2008-01-16 | 西安交通大学 | Double side wall-attached jet air-supply style |
| CN101225988A (en) * | 2008-01-21 | 2008-07-23 | 西安建筑科技大学 | Ventilating system of vertical wall attaching jet air lake mode |
| JP2009243799A (en) * | 2008-03-31 | 2009-10-22 | Mitsubishi Electric Corp | Indoor unit for air conditioner |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252393B (en) * | 2011-05-11 | 2013-10-23 | 西安建筑科技大学 | Attached type air supply method applicable for two side walls of capsule hotel |
| CN102252393A (en) * | 2011-05-11 | 2011-11-23 | 西安建筑科技大学 | Attached type air supply method applicable for two side walls of capsule hotel |
| CN104930635A (en) * | 2015-05-20 | 2015-09-23 | 西安建筑科技大学 | Variable cross-section flow rectifier for square column wall surface attached type uniform air feeding |
| CN104990239A (en) * | 2015-05-20 | 2015-10-21 | 西安建筑科技大学 | Annular uniform cross-section flow equalizing apparatus for cylinder wall-attached air supply |
| CN104990239B (en) * | 2015-05-20 | 2017-12-19 | 西安建筑科技大学 | A kind of annular uiform section current equalizer of cylinder wall sticking type air-supply |
| CN105135586A (en) * | 2015-08-31 | 2015-12-09 | 西安建筑科技大学 | Ventilation device forming airflow organization of air pool, and control method of ventilation device |
| CN105135586B (en) * | 2015-08-31 | 2017-11-28 | 西安建筑科技大学 | A kind of ventilation unit and its control method for forming air pond air current composition |
| CN106524300B (en) * | 2015-09-10 | 2020-02-07 | 大金工业株式会社 | Air conditioner |
| CN106524300A (en) * | 2015-09-10 | 2017-03-22 | 大金工业株式会社 | Air conditioner |
| CN108592189A (en) * | 2018-04-17 | 2018-09-28 | 中铁第四勘察设计院集团有限公司 | Wall attachment jet air-supply arrangement at a kind of arc column of combination fan coil |
| CN108592189B (en) * | 2018-04-17 | 2023-06-30 | 中铁第四勘察设计院集团有限公司 | Attached efflux air supply arrangement of arc post department that combines fan coil |
| CN109059273A (en) * | 2018-08-07 | 2018-12-21 | 河南工业大学 | The heater for having air-cleaning function suitable for polygon column |
| CN108917171A (en) * | 2018-08-07 | 2018-11-30 | 河南工业大学 | The heater for having air-cleaning function suitable for cylinder |
| CN108917171B (en) * | 2018-08-07 | 2023-07-04 | 河南工业大学 | Warm air device with air purification function and suitable for cylinder |
| CN109059273B (en) * | 2018-08-07 | 2023-07-04 | 河南工业大学 | Warm air device with air purifying function suitable for polygonal upright post |
| CN113446691A (en) * | 2021-07-30 | 2021-09-28 | 西安建筑科技大学 | Wall-attached air supply device with double flow guide plates and air supply method thereof |
| CN113446691B (en) * | 2021-07-30 | 2024-06-11 | 西安建筑科技大学 | Wall-attached air supply device with double guide plates and air supply method thereof |
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| CN101988731B (en) | 2012-08-08 |
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Granted publication date: 20120808 Termination date: 20211118 |