Research on Energy Saving Technology of Natural Lighting and Natural Ventilation in Gymnasium Based on ECOTECT

Comfort zone before and after ventilation at night before and after use Natural ventilation before and after the comfort zone Comparing fields Welcome to sports goods and science and technology 2014.07 Research purposes With the sustainable development in the late 21st century more and more by the consensus of all countries, the ecological architectural concept has also attracted widespread attention . Because of its huge internal space, complex functions, and mechanical intensiveness, sports buildings may become researches on the use and composition of the ecological technology if they are mistaken. This article takes the building energy consumption composition of gymnasiums, the potential of building energy-saving measures and its building energy-saving design as the research direction, takes a large amount of research and simulation data as the research object, and uses specialized analysis of architecture performance and optimization design software (Ecotect Analysis) for the construction of gymnasiums. The simulation analysis of layout, natural ventilation, natural light and other aspects compares the analysis data with the actual survey data, and seeks for a passive sustainable building energy saving design proposal for the most optimized stadium.

This study uses data collection methods, field research methods, and computer simulations.

3. Potential analysis of climate and building energy-saving measures The object selected for this study is located in Xi’an, and the software used by the company is the visual time data analysis and transformation software Weathertool. The annual average temperature in Xi'an is 12'C13.6'C. Due to the influence of the monsoon, the winter is cold and the summer is hot and the four seasons are distinct. The extreme maximum temperature in summer is 41.4'C45.2'C, the average temperature in the hottest month (July) is 23C27C, the extreme coldest temperature is -16.9C-20.8C, and the average temperature in the coldest month (January) is -3C1C. Precipitation is 500mm 700mm. Agricultural climate belongs to warm temperate climate zone, belongs to cold area in thermal sector A, the design should meet the requirements of summer heat and moisture.

Based on the Sun route map of Xi'an area simulated by Weafeertool software and the building orientation analysis diagram of Xi'an area, it can be concluded that the best orientation of the Xi'an area is within the range of 150 east of the east and 150 west of the south, and the south of the Xi'an area is towards the south. Towards or south to the west and south to the east to the direction of 150, it should not be facing west or northwest. At the beginning of the design of the gymnasium, this factor should be fully considered to determine the best orientation.

3.2. Potential analysis of building energy conservation measures The thermal district in Xi'an is a cold region. This paper adopts the passive design and analysis module in Weathertool software. The analysis results of this module can be given under the influence of various passive measures, located in the comfort zone and beyond the comfort zone. The percentage of time-in-use data. This article mainly analyzes the four aspects of passive solar heating, high heat capacity materials, natural ventilation and night ventilation, so as to obtain the analysis of building energy conservation potential. The results of the analysis are as follows: The red area in the figure indicates the percentage of the comfort zone after passive measures, and the yellow area indicates the percentage of unused comfort measures in the comfort zone. It can be seen that with these four passive measures, the percentages in the comfort zone are increased to different degrees, and the night ventilation effect is the most obvious.

Passive solar heating before and after the use of high heat capacity materials before and after the comfort zone comfort zone comparison domain monthly comparison of the energy consumption of the gymnasium simulation port: as the consumption of the mouth cooling steep 丨 丨 Ming 槌扛 Fi FiFiT 4, stadium energy simulation analysis selected A stadium in Xi’an is a simulation object. The museum was designed in 2004 and completed in 2006. The exterior wall of the gymnasium uses a 300-ceramic cedar-concrete block and is used as a heat-insulating layer. Its heat transfer coefficient is 0.38W-(mK). The roofing part of the stadium uses an aluminum alloy roofing board with an insulating layer. The thermal coefficient is 0.47W-(mK). As a part of the roof insulation layer of the platform, a 100-thick benzene plate is used, and its heat transfer coefficient is 0.39Wz (mK). The window uses a single-frame, double-layer, hollow plastic steel window with a heat transfer coefficient of 2.9 W-(mK).

The energy simulation analysis of the gymnasium was performed by ECOTECT software. The results of the analysis are shown in Fig. 10. It represents statistics of monthly energy consumption simulation results for the gymnasium and the competition hall.

It can be seen that the heating energy consumption of a stadium in Xi’an City is mainly concentrated in the four months of January, February, November and December, and coincides with the heating period in Xi’an City, in which peaks are reached in January and December; The consumption is mainly concentrated in the three months of June, July and August; the lighting energy consumption is relatively average. Overall, the monthly energy consumption of the museum is in line with the climate characteristics of cold regions. It can be seen that the monthly energy consumption distribution of a competition hall of a stadium in Xi’an is basically the same as the monthly energy consumption distribution of the entire hall. From 10 and 10, it can be seen that the energy consumption of the entire gymnasium and competition hall of a stadium in Xi’an City accounts for a large proportion of heating energy consumption, followed by lighting energy consumption, and at least cooling energy consumption. The energy consumption of heating in a certain university gymnasium in Xi'an is relatively large. The main reason is that the insulation of the external protection structure is not good, the external wall is not provided with insulation layer, and the insulation layer of the roof is also relatively weak. It can be seen that cold areas should pay attention to the insulation design of the external protective structure. In addition, the proportions of energy consumption in the entire hall and the competition hall are relatively close. The reason is that in the simulation, the game mode is not considered, but the simulation is performed according to the daily training mode. There are fewer indoor staff and daily training is for the light environment. The requirement is not so high, so that the proportion of the cooling energy consumption and lighting energy consumption of the competition hall has not increased significantly compared with the entire museum.

The monthly energy consumption of the gymnasium competition hall is simulated. Simulation of the energy consumption of the stadium's competition hall After the above analysis, the energy consumption of the gymnasium's competition hall accounts for more than half of the total energy consumption of the entire hall, of which heating energy consumption accounts for the entire museum. About half of heating energy consumption, cooling and lighting energy consumption accounted for about three-fourths of the energy consumption of cooling and lighting in the entire hall. The proportion of the total energy consumption of the competition hall as a gymnasium is the largest, but horizontally, the heating energy consumption of the competition hall is The proportion of heating energy consumption in the entire museum is less than the ratio of lighting energy consumption and cooling energy consumption of the lighting hall to the lighting energy consumption and cooling energy consumption of the entire museum. At present, there are many researches on the external protection structure, so this paper chooses the building energy saving system. The level of naturalization technology in China is the focus of research.

5, Gymnasium natural lighting optimization design First of all, to establish a stadium building natural light optimization model, the simulation of the relevant parameters set. In order to make the simulation model closer to the actual situation of the gymnasium, the scope of the auditorium is included in the modelling scope when building the model. Considering the scale of college gymnasiums, the number of auditoriums is set at about 2,600, which can meet the needs of international competitions. The seat height is determined by the line-of-sight method. The plane size of the competition hall was set at 63mx62m. The side window was set behind the auditorium and was 14m from the floor of the competition hall. The height was 3m. The width was the same as the side length of the venue, that is, 56m on both sides of the north and south and 38m on the east and west sides. On the other hand, because this article is not aimed at lighting simulation for the entire gymnasium, it is only for lighting simulation of the competition hall. There is no other auxiliary function space and traffic space in the model.

The physical properties of the material selected for the simulation of natural daylighting are given in Table 1. The reflectance of various materials outside the floor was considered in a more unfavorable case and was set at 0.5. Table 1 Physical properties of selected materials Parameters of material transmittance reflectance Transparent glass frosted glass PTFE sun visor inner wall, ceiling floor This paper will be the layout of the lighting mouth, the size of daylighting as the main natural lighting optimization design, will use computer simulation methods to optimize the feasibility of the design program analysis.

The layout of daylighting can be divided into centralized and decentralized. In this paper, the two windows have been simulated under the same window area. It can be seen from the data statistics table of simulation results (see Table 2). The minimum illuminance of the form is greater than 300lx, but the illuminance uniformity U2 is less than 0.5, which can not meet the daily training requirements of the gymnasium. The decentralized arrangement is more evenly distributed than the centralized arrangement, and the possibility of glare in the centralized arrangement is more decentralized, so the decentralized arrangement is closer to the requirements of the stadium.

Table 2 Simulation results of different daylight outlet layouts Marketplaces for daylighting outlets Centralized marketplaces for decentralized market placement The study on the size of daylighting outlets is aimed at opening a decentralized daylight portal at the top interface.

In this paper, the ratio of skylight area to site area was selected to be 0.2, 0.3, 0.4, 0.5, and 0.6 respectively. The parameters of the competition hall are shown in Table 3. It can be seen that when the ratio of the area of ​​the sunroof area to the playing area is 0.3, the illumination uniformity U2 is already greater than 0.5, which can meet the requirements of daily training. When the ratio of the daylight area to the playing area is close to 0.5, the illumination uniformity U1 is greater than 0.4. , U2 is greater than 0.6, the minimum illumination is greater than 5001x, to meet the requirements of professional training and amateur competition.

Table 3 Simulation results of different sunroof sizes. Ratio of sunroof area to site area. 6. Natural ventilation optimum design for gymnasiums According to the design requirements, natural ventilation measures are mainly adopted during the spring and fall seasons. Therefore, the simulations are conducted for the climate characteristics of the two seasons. First, analyze the distribution of wind pressure on the surface of the roof and the facing sidewalls under the prevailing wind direction and wind speed in the spring and autumn seasons, and then determine the reasonable position of the ventilation openings for the finalized building design; then, the indoor temperature field of the competition hall with different ventilation openings and sizes. The air volume is simulated and compared to determine the size of the vent.

According to the established simulation model, the position of the natural ventilation vent is: the air inlet is placed on the outer wall of the south side; the air outlet is set on the roof, the outer wall of the north or the outer wall of the east. However, only the wind pressure is considered in the above situation, and the height of the indoor space in the stadium of the gymnasium is suitable for the use of hot-air ventilation; on the other hand, in order to increase the uniformity of the natural ventilation in the competition hall, the two factors can be integrated. The position of the vents has further narrowed. At the same time, taking into account that the space under the seating area is utilized, a ventilation duct cannot be formed, and in order to facilitate the ventilation of the ventilation duct, the inlet opening is arranged above the seating area. Therefore, this paper proposes that the location of the ventilation openings in the Xi'an Stadium should be set as follows: the air inlets should be installed on the south side wall seats; the exhaust air can use the combined roof outlets and the north side air outlets on the north side. Exhaust outlets are high.

After the position of the vent is basically determined, the size of the vent can be simulated. In order to determine the size of the vents, five different vent sizes were simulated separately. In the simulation, the outdoor temperature is set as the most unfavorable temperature for natural ventilation, that is, 22C; the indoor heat source takes into account the human body heat dissipation and lighting heat dissipation, the human body heat dissipation is set as a dispersal heat source, and is arranged at the bottom of the competition hall, and the heat dissipation is 75 W per person, and the lighting will be Heat dissipation is set to be Jianwen Sports & Technology. 214. Eight concentrated heat sources in strip form are uniformly arranged at a height of 16m above the floor of the competition hall. The heat dissipation is 13Wzm2, and the area is calculated based on the site area. According to the daily training and teaching mode of the gymnasium, the purpose of the simulation is to examine the influence of the size of the vent on the indoor temperature distribution and airflow velocity distribution in the competition hall, and determine the appropriate vent size based on the simulation results.

The simulation results of the vent size scheme are shown in Table 4. It can be seen from Table 4 that the vent size scheme 15 meets the requirements for comfort and fresh air flow in the constrained condition, but only the vent size 4 and 5 meet the requirements for the wind speed. .

Table 4 Vent Size Solution Simulation Results Intake Area Exhaust Area Area Competition Room Temperature Range (Cop. Room Wind Speed ​​Range Fresh Air Flow Vent Size) Option 1 Vent Size Option 2 Vent Size Option 3 Vent Size Option 4 Vent Size Solution 5 Based on the simulation results of the vent size 15 solution, the following conclusions are drawn: Natural ventilation in a stadium in Xi’an is based on ventilation caused by wind pressure; and when the area of ​​the air inlet is small, the outer window on the north side cannot reach the exhaust outlet. The role of the stadium in the daily training mode of natural ventilation vent size, when the south side of the inlet area of ​​about 30m2, roof outlet area of ​​about 213m2, will be able to meet the Xi'an stadium transition season ventilation requirements.

The energy-saving design of a sustainable building in a gymnasium is a complex process that combines multiple jobs and various design relationships. This paper only optimized the natural lighting and natural ventilation that are used most frequently in the passive energy-saving design of a building energy saving system in a stadium in Xi’an. The goal of the optimization is to minimize the total building energy consumption in the operation of the gymnasium. . This paper finally concludes that the optimal design plan for a stadium building in Xi'an is the following il point.

The air inlet is arranged on the south side wall seat; the exhaust air outlet can use the combination of the roof air outlet and the north air outlet; the north air outlet is in the high position; the skylight is used for lighting, and this is used as the row The use of tuyere; the smallest area of ​​the sunroof should be about 0.10.2 times the area of ​​the competition venue; the sunroof adopts a decentralized arrangement; (3) The air inlet is set on the south side of the external wall, with an area of ​​about 30m2; (6) The sunroof opening area should be greater than 213m2.

Filter Media

filter media,bio filter media,mbbr filter media

YIXING HOLLY TECHNOLOGY CO.,LTD. , https://www.watertreatment-machine.com