As an important part of the power grid, thermal power plants and substations are of great significance to national production. However, the types of buildings in thermal power plants and substations are complex and require high illumination, so it is accurate, standardized and scientific to design lighting. Especially important [1 - 2].
In the past lighting design, the layout of the luminaire mainly relied on the designer's personal design experience and rough manual calculation. Due to the large difference in personal experience, the rough manual calculation can only estimate the average illuminance of the room, and the specific point of the room. Irregularity of illuminance or irregular shape of the room is difficult to estimate; In addition, manual estimation does not take into account the particularity of the location of equipment in the room, and it is difficult to reflect the indicators such as uniform glare value, color rendering coefficient, color temperature, and illumination uniformity [3 - 6]. It can be seen that the traditional lighting design process has become increasingly difficult to meet the increasing lighting needs.
With the development and application of computer technology, the emergence of various types of lighting software makes software computing illuminance a reality, so with these software, designers can easily modify the lighting scheme according to the illuminance calculation results. In July 2007, the state officially released a new version of the â€œDL/T5390 - 2007 Thermal Power Plant and Substation Lighting Design Technical Regulationsâ€ , which has clear requirements for other parameters such as lighting power density values â€‹â€‹of thermal power plants and substations. Therefore, in order to design lighting more conveniently and efficiently, the method of assisting design using lighting software has been increasingly used by designers. Based on the example, this paper uses DIALux software to establish a 3D simulation model, analyzes various lighting schemes, optimizes the lighting design method, and verifies the calculation accuracy of the software by comparing the measured values â€‹â€‹with the simulated values.
1 Introduction to DIALux Software
DIALux is an auxiliary design software developed by DIAL GmbH of Germany for lighting analysis and calculation. It has been widely recognized and applied worldwide. The software is powerful and can be used for indoor, outdoor, road lighting and other occasions and types of lighting design. Users can download the latest simplified Chinese version of the software from DIALux's official website for free. DIALux has a simple and convenient working interface, supports mouse drag and drop, is easy to get started and quickly applies to design practice. The software supports interaction with AutoCAD and Microstation, which can import room size information by loading DWG or DXF files, avoiding the cumbersome and error of manual input.
The mainstream lighting manufacturers at home and abroad have basically released the lighting library plug-in with DIALux. At present, more than 200 lighting library plug-ins have been released. Manufacturers of plug-ins for lighting libraries in foreign countries include Philips, OSRAM, BEGA, iGuzzini, etc. Domestic manufacturers include NVC, Shanghai Yaming, Sanxiong Aurora, and Shifu. Users can download the fixture library plug-in free of charge through the manufacturer's official website, and can find, add and arrange the required fixtures according to different categories such as product series, product number, installation method and light source. The DIALux software comes with standard components for cubes and cylindrical lamps, as well as indoor and outdoor scene elements such as furniture and vehicles. It can also import object files in . sat format, allowing designers to simulate more realistic scene environments. DIALux software also provides powerful report generation capabilities, and the generated report will save the calculation results as a PDF file. The information of the design scheme can be improved before the report is generated, so that the generated report is more standardized and beautiful. The generated report content includes design cover, lighting instrument table, lighting data table, input agreement, illumination position map, 3D rendering, pseudo color representation, illuminance map of each space surface, illuminance diagram such as gray scale, and illuminance diagram Waiting for dozens of form content, users can choose to generate PDF content according to their own needs.
2 illuminance calculation analysis
With DIALux software, not only can illuminance calculations be made, the designer has an intuitive and clear understanding of the effects of the lighting schemes that are deployed, but it also helps the designer to optimize the luminaire layout and select the number of luminaires. At the same time, it is improving the comfort of the inspectors and achieving energy saving, economic and environmental protection. Taking the engineering main control room as the research object, the room geometry is 10.12m Ã— 19. 68 m Ã— 4. 6 m. When the parameters are set in the DIALux, according to the DL / T 5930 - 2007 Thermal Power Plant and Substation Lighting Design Technical Regulations, the illuminance maintenance factor of the main control room is set to 0.7, and the working surface height is set to 0. 75 m. The ceiling is selected as a standard ceiling with a reflection coefficient of 70%, the wall is selected as a standard wall, the reflection coefficient is 50%, the floor is selected as a standard floor, and the reflection coefficient is 20%.
2. 1 first edition lighting design
Option 1: Select iGuzzini 5096 BOS range ceiling luminaires 1 Ã— 100W as DC constant light, a total of 3 ç›, arranged in Figure 1 in Figure 1; NVC NDL482 / 1 Ã— 36W T8 inductor flat cover bracket fluorescent lamp as the screen cabinet Lighting fixtures, a total of 27 inches, are arranged as shown in Figure 2 in Figure 1; NVC NDL483 /2 Ã— 36W T8 Inductor Flat Cover Brackets as a C-shaped workbench lighting fixture, 4 rows, 4 columns, 16 turns, The arrangement is shown in Figure 3 in Figure 1.