CFD在住宅室内设计中的应用（The application of CFD in residential interior design）

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1、CFD在住宅室内设计中的应用（The application of CFD in residential interior design）Draft date: 2010-01-05Author profile: su east (1985 -), male, master of materials science and engineering, chongqing university, chongqing 400045Gong qiyi (1966 -), male, master tutor, associate professor, department of materials s

2、cience and engineering, chongqing university, chongqing 400045East China gong qiyiAbstract: Airpak is a CFD special software for simulating indoor airflow, for engineering and scientific research. The software simulates an interior designerThe air flow organization and thermal comfort of the case, t

3、hrough the adjustment of comparative analysis, verified CFD to improve the indoor thermal environment and the feasibility of improving energy efficiency.Key words: Airpak, interior design, energy saving, air flow organizationMiddle image classification no. : TU834.852 literature identification code:

4、 AIn residential interior design, reasonable indoor air flow organization can not only create comfortable and healthyKangs bedroom thermal environment, also can reduce the residential future use energy consumption. CFD software is the meterThe abbreviation for Computational Fluid Dynamics software i

5、s specially usedTo conduct flow field analysis, flow field calculation, and flow field prediction software. With the help of CFD softwareIndoor air flow simulation, we can understand the indoor air distribution details, and passThe analysis takes place in the flow field, the interior design is adjus

6、ted, the reasonable organization roomInternal air flow, improve the energy efficiency and comfort of the house, and achieve the best design result.1. Air flow organization and energy saving in air-conditioning roomGenerally speaking, the air flow organization of air conditioning room is to point to

7、air conditioning room send, return windThe choice and arrangement of the mouth makes the air sent into the room reasonably flow and distribute in the room.The temperature, humidity, speed and cleanliness of air conditioning room can be fully filledFoot production process and human thermal comfort re

8、quirements. However, for the average house, the roomThe dimension is small, limit the placement of indoor air conditioner to some extent, and indoorThe position of the machine is also limited by the location of the outdoor machine and the length of the piping. The principle of interior designAccordi

9、ng to the state characteristics of personnel activities in different functional Spaces and the air conditioningThe position is arranged for the layout of the plane, so that the air flow organization under the conditions of the specific operating conditions is to meet the needs of the peopleThe therm

10、al comfort level of the activity intensive area is subject to the area with less personnel activityIt can relax the requirement of comfort, thereby reducing the energy consumption of air conditioning and improving energy efficiencyTo save energy.2. CFD simulation of interior design schemeThis paper

11、takes the two design schemes of the seventh floor of a residential district in chongqing as an exampleThe establishment work of the model, take the space bigger, the furniture furnishings the more complicated living room is the researchThe object (see figure 1, figure 2). The length, width and heigh

12、t of the living room are 6.5 m by 6 m x2.8 m, the walls are painted inside, the ceiling of the acoustic gypsum board, the adjacent room and the corridor are air-conditioned roomsIn between, do not consider metope heat transfer. The living room is refrigerated by haier cabinet in summer, most of them

13、The time staff sat in the sand.2.1 physical modelConsidering the computer memory and computational speed, the premise of calculating the result is not affectedNext, the model is properly simplified: the room porch and the left glass surface are complemented by indoorThe Windows were closed and the t

14、wo doors in the living room filled with solid walls. Upper part of the air-conditioning chamberMaterial, etc.Especially in the current beginning stage, our country has not established a set of goodEconomic, social and moral incentives to compensate developers for green eco-homesThe extra inputs in t

15、he community, so the eco-houses want to get a lot of developmentTo support government macro-policy. Ecological housing will become a 21st-century human applicationThe technology seeks to coexist with the natural harmonious coexistence and sustainable development of the ideal residential building mod

16、el.Of course, due to the limitations of knowledge and profession and the misleading of developers, people are oppositeThere are still some misunderstandings in the residential community, which are mainly manifested in the following aspects:1) mistake: garden community is the ecological community. So

17、me developers are pursuing itBenefit and cater to the consumers concept of demand, the green house ecological residenceThe brand, rely on simple pursuit of natural environment beautification, simply add green space to attract eliminationFee. The green house, as the developer advocates, is everywhere

18、Its not really an ecological home. Its just a garden in the residential communityType beautification does not make a fundamental change in its function.2) the green design is confused with green design. Green space or green design isAn important branch in the design of ecological residential area, b

19、ut the traditional green space oftenOnly the area index and the service radius, the green space is usually only in traffic and constructionThe negative status of filling the gap after construction is not positive in the ecological senseThe role of. And green design is a kind of warfare in the design

20、 field of sustainable development strategyThe meaning of the operation is far more extensive and profound than greening, and it is more about the ecosystem,The land landscape, integral harmony, intensive efficiency and other concepts are related.The development of eco-housing is undoubtedly a huge o

21、ne because of its many disciplines and specialtiesThe system engineering, to make the ecological residence in our country vigorous development, we must have allThe people mobilize and work together to build our own beautiful homeland and work together.References:Wu hui, 1. Rational thinking on the d

22、evelopment of ecological housing J. Shanxi university of finance and economicsReport, 2002 (5) : 24-25.2 zhao haiqing. Brief discussion on developing green ecological residence J. Shanxi building, 2008, 34 (4) :69-70.3 liu yu-yuan, zhou tao. Development analysis of green ecological residential commu

23、nity in China J.Journal of east China jiaotong university, 2002 (6) : 65-66.4 Chen bingzhao. Sustainable development of Chinese living environment M. Beijing: science press,2003.On the construction of sustainable ecological residential communityFU Li - binAbstract: It introduces in details the susta

24、inable ecological residential community, and points out its main developing the features and all, cor -Rects some mistaken understandings, and puts forward the necessary the conditions of developing sustainable ecological residential community, inOrder to promote the establishment and development of

25、 sustainable ecological residential community.Sustainable, ecological residential community, green environment, 17,M x 0.3 m air outlet, bottom half m by 0.5 m return air outlet, air supply sideWith the horizontal plane Angle 45 . Airpak 2.1 modeling is shown in figure 3, as shown in figure 4.2.2 ma

26、thematical model and boundary conditions2.2.1 mathematical modelThe application of CFD technology in indoor thermal environment is based on incompressible airDiscretization of mass, momentum and energy conservation differential equation and its numerical analysis of 1.In this paper, the flow problem

27、 of a turbulent 3d stabilizer is based on the characteristics of turbulent airMicroanalysis, using the indoor zero equation model to solve equations, limited to space, about the modelThe detailed description of the type is no longer described. To simplify the problem, make the following assumptions:

28、1) low speed indoor air flow can be considered as incompressible fluid and is consistent with BossinesqAssumptions; 2) flow is steady flow; 3) indoor air is the radiating transparent medium; 4) do not considerThe influence of the door; 5) do not consider the air leakage effect, the room air tightnes

29、s is good.2.2.2 boundary conditionsInlet boundary: indoor air conditioning air supply velocity of 2 m/s, supply air temperature is 20 .Export boundary: the export boundary adopts local one-way processing, that is, the export interface is assumedThe node has no influence on the first internal node, t

30、hus the influence of the internal node can be madeThe number is zero, so you dont have to know the value of 3 on the export boundary.Wall boundary: the boundary condition of the interior wall is set as the thermostatic boundary, the south wall and the east wallTemperature of 30 , the south and the e

31、ast window is 36 , the rest of the wall temperature is 29 ; The TV setHeat flow boundary, heat flow is 180 W; The total heat flow of the living room pendant is 90 W. The human body, Jane,The total heat flow of each person is 75 W. The other object boundaries are set as adiabatic boundaries.3 CFD tec

32、hnology is used to guide optimized interior design3.1 organize the plane function layout in the designFIG. 5 - FIG. 7 shows the temperature and heat of Y = 0.9 m in the living room plan AThe distribution diagram of PMV, PPD.Y = 0.9m plane is basically the position of the head and neck on the couch,I

33、t is the most intense position of environmental comfort. Figure 5. The living room solution A cloth in figure 7Such a temperature distribution state is obviously not to the designIn this plane layout, the indoor temperature of the personnel is too high, no moreGood thermal comfort, while the tempera

34、te zone is not being used well.Under this design scheme, the staff in the sofa area can satisfy the heatThe comfortable requirement, have to increase indoor air conditioning to send the wind speed or reduce the air blast temperatureAnd thats going to increase the power consumption, and its going to

35、generate a very significant amount of electricity consumption over the years.And increasing the speed of air supply also makes the average wind speed in the room too high, with a clear hair dryerFeel, affect comfortable, and reduce temperature also can make originally such as the sitting room centra

36、l area already reachedThe places where comfort is required become colder and less conducive to economic use of energy.Such a design approach USES interior design to satisfy the persons comfortable requirement AngleIt is not advisable to set out. Adjust the interior design plan to the living room pla

37、n BThe arrangement of the display, in the condition of not changing the temperature and speed of the original air conditioner, is in sandPeople in the hair area can get better thermal comfort (see figure 8).To organize the indoor air flow in the designIn the living room plan A, the cold air comes ou

38、t of the air-conditioner machine and then cuts off, onePart of the rebound comes back to the wind, and the other part goes to the opposite corner of the wall and slowly flowsMove to sofa area, at this time, cold wind temperature and speed attenuation are very big, arrive sofaThe wind speed in the ar

39、ea is less than 0.15m/s.According to the above situation, adjust the design plan to the living room plan B, after the sofaIn the back of the effective intercept, most of the cold air flow in the sofa area circulation, canFast enough to reduce the temperature of the region to the comfort zone, where

40、most of the wind speed is less than0.25 m/s within the comfort standard range.Thus can be seen, through the simulation of indoor air flow, can be the interior design scheme inThe quality of air flow is prejudged, and the results are analyzed and judgedDifferent forms of interior design methods such

41、as broken, furniture and ceiling are designed to optimize air flow organizationThe area that directs the personnel intense activity forms a good thermal comfort environment. In addition, the use ofSimulation of CFD technology, we can also use different decorative materials in interior designThe different comfortable feelings brought by materials are studied to enable interior design to be technicallyControl to create a better indoor environment for health and energy conservation.4 conclusion 18 no. 36, no. 12, no. 12, no. 12