CN116776655B - Airflow simulation method for elevator car - Google Patents
Airflow simulation method for elevator car Download PDFInfo
- Publication number
- CN116776655B CN116776655B CN202311072221.5A CN202311072221A CN116776655B CN 116776655 B CN116776655 B CN 116776655B CN 202311072221 A CN202311072221 A CN 202311072221A CN 116776655 B CN116776655 B CN 116776655B
- Authority
- CN
- China
- Prior art keywords
- elevator car
- airflow
- elevator
- car
- air
- 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.)
- Active
Links
- 238000004088 simulation Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000008859 change Effects 0.000 claims abstract description 7
- 238000004364 calculation method Methods 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Geometry (AREA)
- General Physics & Mathematics (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
Abstract
The invention relates to the technical field of elevator car airflow detection, in particular to an elevator car airflow simulation method, which comprises the steps of simulating main equipment in an elevator shaft, an elevator car and airflow velocity change wind pressure of air in the elevator shaft; the airflow simulation data can be obtained by simulating and setting specific factors influencing the airflow of the car, and the airflow velocity, the effective temperature difference, the effective area and the wind pressure coefficient in the factors can be respectively simulated, wherein the wind pressure coefficient and the effective temperature difference can further influence the wind pressure difference; the elements are mutually matched and mutually influenced, the simulation method can change wind pressure and effective temperature difference according to the airflow velocity of air in the main equipment, the elevator car and the elevator shaft, obtain the flow condition and the airflow of simulated airflow based on the actual effective area of the elevator car, simulate whether the airflow in the elevator car meets the use requirement in the use environment, and are favorable for simulating and judging the airflow condition of the elevator car under different use conditions.
Description
Technical Field
The invention relates to the technical field of elevator car airflow detection, in particular to an elevator car airflow simulation method.
Background
With the construction of high-rise buildings, elevators are widely used as a high-rise transport means; in order to maintain good air flow in the elevator car, air permeability during riding is maintained; the existing elevator equipment is lifted in an elevator shaft provided with a sealing wall, an axial flow fan air inlet on the shaft and an axial flow fan air exhaust under the shaft are respectively arranged above and below the elevator shaft, and main equipment comprising a fan filter unit is arranged on the sealing wall side of one elevator shaft to provide flowing air flow.
When passengers take an elevator, the elevator car with poor airflow flowing effect in the elevator car can cause poor thermal comfort and is sultry and airtight, so that the airflow in the elevator car flows unreasonably, and the comfort level of taking the elevator can be reduced; the proper airflow is of great importance for comfort in use of the elevator car, so that it is necessary to obtain a car airflow which can be measured in a simulated manner under different use conditions, so as to adjust the car airflow according to different use environments. In view of this, we propose a method of elevator car airflow simulation.
Disclosure of Invention
In order to make up for the defects, the invention provides an elevator car airflow simulation method.
The technical scheme of the invention is as follows:
an elevator car airflow simulation method comprises the steps of simulating airflow flow rates of air in main equipment, an elevator car and an elevator shaft in an elevator shaft to change wind pressure; in the airflow simulation method, the airflow velocity and the wind pressure are respectively regulated through fan equipment arranged in a main device, an elevator car and an elevator shaft, the airflow velocity and the wind pressure of the main device are controlled to be larger than those in the elevator car, and the airflow velocity and the wind pressure in the elevator car are larger than those in the elevator shaft.
Preferably, an axial flow fan on a shaft and an axial flow fan under the shaft which can respectively realize air inlet and air exhaust are arranged in the elevator shaft, and an air flow gap is reserved between the elevator shaft and an elevator car, so that the elevator shaft has a volume flow formula:
；
wherein: v (V) 1 The air flow velocity of the air inlet is m/s; a, a 1 Is the area of the air inlet, m 2 ；
V 2 The air flow velocity at the gap between the surface of the elevator car and the elevator shaft is m/s;
a 2 for elevator carArea of gap between surface and elevator shaft, m 2 ；
V 3 The flow speed of the air flow at the air outlet is m/s; a, a 3 For the area of the air outlet, m 2 。
Preferably, a temperature difference exists between the inside and the outside of the elevator car, and a specific simulation formula is as follows:
；
；
wherein:is the effective temperature difference, DEG C; />Is the external environment temperature of the car and is at the temperature of DEG C; />Is the temperature inside the car, DEG C;
providing airflow velocity and +.>+/>Is the total airflow velocity, m/s;
、/>、/>air flow rates in the horizontal and vertical axes, m/s.
Preferably, when the axial flow fan on the shaft in the elevator shaft and the axial flow fan under the shaft work, the elevator car is internally provided with air flows flowing in from the fan and the pore, and the calculation formula of the car air flow is as follows:
；
wherein: q is the air flow from the elevator car, m 3 /h；Is the orifice flow coefficient;
a is the effective area of the elevator car capable of penetrating into air flow, and comprises the conduction area when the car door is opened and closed, m 2 ；
The pressure difference Pa of the wind pressure of the inner side and the outer side of the elevator car; />Is air density, kg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the i and n represent the number of items.
Preferably, the calculation simulation formula of the air pressure and pressure difference between the inner side and the outer side of the elevator car is as follows:
；
wherein: g is the gravitational constant; h andthe height of the elevator car is m; />The wind pressure coefficient of the surface of the elevator car;
the temperature of the air outlet of the elevator shaft is DEG C; />The temperature of the elevator car or the temperature of the ventilation position of the main equipment is set at DEG C;
the temperature of the bottom surface of the elevator shaft is 0.1m and is DEG C; />The temperature of the air inlet of the elevator shaft is DEG C.
Preferably, the method comprises the steps of,the wind pressure coefficient empirical calculation formula is:
；
wherein:an average wind direction included angle between the elevator car airflow and the opening normal; m is the aspect ratio of the elevator car surface.
Preferably, the average wind direction angleThe calculation formula of (2) is as follows:
；
wherein:the flow rate of the air flow at the ith minute, m/s; />Is the included angle of wind direction at the ith minute in the experimental data.
Preferably, the air flow rate of the main equipment is 0.45-0.9m/s, the air flow rate of the fan in the elevator car is 0.3-0.8m/s, and the air flow rate of the elevator shaft is 0.25-0.5m/s.
Compared with the prior art, the invention has the beneficial effects that:
according to the elevator car airflow simulation method, the specific elements influencing the car airflow can be simulated and set to obtain airflow simulation data, airflow velocity, effective temperature difference, effective area and wind pressure coefficient in the elements can be simulated respectively, and the wind pressure coefficient and the effective temperature difference can further influence the wind pressure difference; the elements are mutually matched and mutually influenced, the simulation method can change wind pressure and effective temperature difference according to the airflow velocity of air in the main equipment, the elevator car and the elevator shaft, obtain the flow condition and the airflow of simulated airflow based on the actual effective area of the elevator car, simulate whether the airflow in the elevator car meets the use requirement in the use environment, and are favorable for simulating and judging the airflow condition of the elevator car under different use conditions.
Drawings
FIG. 1 is a simulated view of the airflow velocity in the interior of a car when the door of the car of the present invention is open;
FIG. 2 is a diagram of a simulation of the static pressure of the air flow in the interior of the car when the door of the car of the present invention is open;
fig. 3 is a simulated view of the velocity of the air flow in the interior of the car when the car door of the present invention is closed;
fig. 4 is a simulated view of the static pressure of the car interior chamber air flow when the car door of the present invention is closed.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, the present invention is described in detail by the following embodiments:
the airflow simulation method comprises simulating airflow flow rates of air in a main device, an elevator car and an elevator shaft in the elevator shaft to change wind pressure; in the airflow simulation method, the airflow velocity and the wind pressure of the main equipment are respectively regulated through fan equipment arranged in the main equipment, the elevator car and the elevator shaft, the airflow velocity and the wind pressure of the main equipment are controlled to be larger than those in the elevator car, and the airflow velocity and the wind pressure in the elevator car are controlled to be larger than those in the elevator shaft.
The elevator shaft is internally provided with an axial flow fan on a shaft and an axial flow fan under the shaft, which can respectively realize air inlet and air exhaust, and an air flow gap is reserved between the elevator shaft and an elevator car, so that the elevator shaft has a volume flow formula:
；
wherein: v (V) 1 The air flow velocity of the air inlet is m/s; a, a 1 Is the area of the air inlet, m 2 ；
V 2 The air flow velocity at the gap between the surface of the elevator car and the elevator shaft is m/s;
a 2 for the area of the gap between the surface of the elevator car and the elevator shaft, m 2 ；
V 3 The flow speed of the air flow at the air outlet is m/s; a, a 3 For the area of the air outlet, m 2 。
The temperature difference exists inside and outside the elevator car, and a specific simulation formula is as follows:
；
；
wherein:is the effective temperature difference, DEG C; />Is the external environment temperature of the car and is at the temperature of DEG C; />Is the temperature inside the car, DEG C;
providing airflow velocity and +.>+/>Is the total airflow velocity, m/s;
、/>、/>air flow rates in the horizontal and vertical axes, m/s.
When the axial flow fan on the shaft in the elevator shaft and the axial flow fan under the shaft work, the elevator car is internally provided with air flows flowing in from the fan and the holes, and the calculation formula of the car air flow is as follows:
；
wherein: q is the air flow from the elevator car, m 3 /h；Taking 0.62 for orifice flow coefficient;
a is the effective area of the elevator car capable of penetrating into air flow, and comprises the conduction area when the car door is opened and closed, m 2 ；
The pressure difference Pa of the wind pressure of the inner side and the outer side of the elevator car; />Is air density, kg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the i and n represent the number of items.
The calculation simulation formula of the air pressure difference between the inner side and the outer side of the elevator car is as follows:
；
wherein: g is the gravitational constant of 9.8; h andthe height of the elevator car is m; />The wind pressure coefficient of the surface of the elevator car;
the temperature of the air outlet of the elevator shaft is DEG C; />The temperature of the elevator car or the temperature of the ventilation position of the main equipment is set at DEG C;
the temperature of the bottom surface of the elevator shaft is 0.1m and is DEG C; />The temperature of the air inlet of the elevator shaft is DEG C.
The wind pressure coefficient empirical calculation formula is:
；
wherein:an average wind direction included angle between the elevator car airflow and the opening normal; m is an elevator carAspect ratio of the car surface.
Average wind direction angleThe calculation formula of (2) is as follows:
；
wherein:the flow rate of the air flow at the ith minute, m/s; />Is the included angle of wind direction at the ith minute in the experimental data.
In the method for simulating the airflow of the elevator car, the airflow speed of the main equipment is 0.45m/s, the airflow speed of a fan in the elevator car is 0.4m/s, and the airflow speed in an elevator shaft is 0.3m/s; when the elevator car door is in an open state, the airflow speed of the main equipment is larger than the airflow speed in the elevator car, and the airflow speed in the elevator car is larger than the airflow speed in the elevator shaft; when the effective temperature difference of the measured temperature environment is 5.63 ℃, the air pressure of the air flow at the main equipment is 5Pa higher than that of the inner cavity of the elevator car, and 15Pa higher than that of the air flow in the well, the air flow meets the requirements of clean environment, and the embodiment sets the air direction at an angle of 45 degrees with the elevator car; applying a fan of the elevator car to convey the airflow with the flow rate of 0.85M/s and the M of 4/3, and when the elevator runs in the simulation processAnd (3) the change of the airflow velocity is simulated by a computer, if the car airflow is required to be calculated according to a summation formula in the non-uniform velocity process, obtaining a simulation diagram shown in figures 1-4 when the simulation setting uniform velocity is stabilized to be 2.5 m/s.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. An elevator car airflow simulation method is characterized by comprising the following steps of: the airflow simulation method comprises the steps of simulating airflow flow velocity of air in a main device, an elevator car and an elevator shaft in the elevator shaft to change wind pressure; in the airflow simulation method, the airflow velocity and the wind pressure are respectively regulated through fan equipment arranged in a main device, an elevator car and an elevator shaft, the airflow velocity and the wind pressure of the main device are controlled to be larger than those in the elevator car, and the airflow velocity and the wind pressure in the elevator car are controlled to be larger than those in the elevator shaft;
the elevator shaft is internally provided with an axial flow fan on a shaft and an axial flow fan under the shaft, which can respectively realize air inlet and air exhaust, and an air flow gap is reserved between the elevator shaft and an elevator car, and the elevator shaft has a volume flow formula:
V 1 a 1 ＝V 2 a 2 ＝V 3 a 3
wherein: v (V) 1 The air flow velocity of the air inlet is m/s; a, a 1 Is the area of the air inlet, m 2 ；
V 2 The air flow velocity at the gap between the surface of the elevator car and the elevator shaft is m/s;
a 2 for the area of the gap between the surface of the elevator car and the elevator shaft, m 2 ；
V 3 The flow speed of the air flow at the air outlet is m/s; a, a 3 For the area of the air outlet, m 2 ；
The temperature difference exists inside and outside the elevator car, and a specific simulation formula is as follows:
ΔT＝(t i -t h )-7.66(V x +V 2 -0.15)
wherein: delta T is the effective temperature difference, DEG C; t is t i Is the external environment temperature of the car and is at the temperature of DEG C; t is t h Is the temperature inside the car, DEG C;
V x providing airflow velocity and V for fan in car x +V 2 Is the total airflow velocity, m/s;
V y 、V z 、V x air flow velocity in horizontal and vertical axes, m/s;
when the axial flow fan in the elevator shaft works with the axial flow fan in the elevator shaft, the elevator car is internally provided with air flows flowing in from the fan and the holes, and the calculation formula of the car air flow is as follows:
wherein: q is the air flow from the elevator car, m 3 /h；C d Is the orifice flow coefficient;
a is the effective area of the elevator car capable of penetrating into air flow, and comprises the conduction area when the car door is opened and closed, m 2 ；
Δp is the difference in air pressure between the inner and outer sides of the elevator car, pa; ρ is the air density, kg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the i and n represent the number of items;
the calculation simulation formula of the air pressure difference between the inner side and the outer side of the elevator car is as follows:
wherein: g is the gravitational constant; h and h i The height of the elevator car is m; c (C) p The wind pressure coefficient of the surface of the elevator car;
T f the temperature of the air outlet of the elevator shaft is DEG C; t (T) h The temperature of the elevator car or the temperature of the ventilation position of the main equipment is set at DEG C;
T e the temperature of the bottom surface of the elevator shaft is 0.1m and is DEG C; t (T) 0 The temperature of the air inlet of the elevator shaft is DEG C;
C p the wind pressure coefficient empirical calculation formula is:
wherein: beta is the average wind direction included angle between the elevator car airflow and the opening normal; m is the aspect ratio of the elevator car surface.
2. The elevator car airflow simulation method of claim 1, wherein: the calculation formula of the average wind direction included angle beta is as follows:
wherein: v (V) i The flow rate of the air flow at the ith minute, m/s; beta i Is the included angle of wind direction at the ith minute in the experimental data.
3. The elevator car airflow simulation method of claim 1, wherein: the air flow speed of the main equipment is 0.45-0.9m/s, the air flow speed of the fan in the elevator car is 0.3-0.8m/s, and the air flow speed of the elevator shaft is 0.25-0.5m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311072221.5A CN116776655B (en) | 2023-08-24 | 2023-08-24 | Airflow simulation method for elevator car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311072221.5A CN116776655B (en) | 2023-08-24 | 2023-08-24 | Airflow simulation method for elevator car |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116776655A CN116776655A (en) | 2023-09-19 |
| CN116776655B true CN116776655B (en) | 2023-10-24 |
Family
ID=87989911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311072221.5A Active CN116776655B (en) | 2023-08-24 | 2023-08-24 | Airflow simulation method for elevator car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116776655B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481063A (en) * | 2008-12-31 | 2009-07-15 | 日立电梯（中国）有限公司 | Elevator lift-cabin wind-guiding device |
| JP2023023740A (en) * | 2021-08-06 | 2023-02-16 | 株式会社竹中工務店 | elevator ventilation system |
| CN116588774A (en) * | 2023-06-07 | 2023-08-15 | 成都思越智能装备股份有限公司 | Freight elevator service life prediction device and method |
-
2023
- 2023-08-24 CN CN202311072221.5A patent/CN116776655B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481063A (en) * | 2008-12-31 | 2009-07-15 | 日立电梯（中国）有限公司 | Elevator lift-cabin wind-guiding device |
| JP2023023740A (en) * | 2021-08-06 | 2023-02-16 | 株式会社竹中工務店 | elevator ventilation system |
| CN116588774A (en) * | 2023-06-07 | 2023-08-15 | 成都思越智能装备股份有限公司 | Freight elevator service life prediction device and method |
Non-Patent Citations (2)
| Title |
|---|
| Theoretical modeling and sensitivity analysis of the car-induced unsteady airflow in super high-speed elevator;Qiao, S等;《JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS》;280-293 * |
| 电梯轿厢厢内热舒适性的研究;杨红辉等;《中国优秀硕士学位论文全文数据库》(第6期);1-89 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116776655A (en) | 2023-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107497815A (en) | Vent cabinet | |
| US11325712B2 (en) | Systems and methods for limiting infiltration of cabin air into the flight deck of an aircraft | |
| US20220099521A1 (en) | Method and system for monitoring air leaks through a building envelope and controlling a ventilation system | |
| CN116776655B (en) | Airflow simulation method for elevator car | |
| CN111706951B (en) | Thermal comfort ventilation and pollutant control method for air stability of limited space | |
| EP3964289A1 (en) | Isolator system | |
| CN112840292A (en) | System and method for cooling computing devices within a facility | |
| CN105135586B (en) | A kind of ventilation unit and its control method for forming air pond air current composition | |
| US20230375201A1 (en) | Method and system for controlling a ventilation system to prevent infiltration of pollutants through a building envelope | |
| Yii et al. | Experimental study of fire compartment with door opening and roof opening | |
| CN105157155B (en) | A kind of unilateral ventilation unit and its control method for forming air pond air current composition | |
| Irawan et al. | Investigating the temperature and air velocity distribution of split-type air conditioners using computational fluid dynamics | |
| CN105135585B (en) | A kind of bilateral ventilation device and its control method for forming air pond air current composition | |
| Yu et al. | Scale model analysis of opening effectiveness for wind-induced natural ventilation openings | |
| Dias et al. | CFD simulation of the aerodynamic sealing of plane jets | |
| JP2019105448A (en) | Prediction method of powder dust behavior in building | |
| Mowrer et al. | A comparison of driving forces for smoke movement in buildings | |
| Kivva et al. | A numerical study of ventilation flow through a 3-dimensional room with a fan | |
| CN106594971A (en) | Method for controlling minimum air volume of mechanical ventilation system in cavern | |
| Klote | Computer modeling for smoke control design | |
| Yuehui et al. | The Influence of Air Applying/Exhausting Mode on Air Velocity Distribution Using Fluent Software and Computational Fluid Dynamics | |
| TWI814319B (en) | Adjustment method of air-outlet duct and air-outlet uniformity thereof | |
| Goda et al. | Investigation of average air velocity and turbulence intensity in a slot ventilated space | |
| US20220049865A1 (en) | Ventilation airflow in confined spaces to inhibit the transmission of disease | |
| De Neve et al. | CFD analysis of the effect of self-regulating devices on the distribution of naturally supplied air |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |