Standards and design are important guarantees for implementing low-carbon lighting

Keywords: low carbon lighting, standard lighting design, evaluation index, lighting power density

1 Introduction

On November 25, 2009, the State Council decided that by 2020, China's unit GDP (GDP) CO2 emissions will fall (decrease) by 40% to 45% compared with 2005 as a binding indicator for inclusion in the 125 program and future society. Medium and long term planning. This is also the commitment made by Premier Wen at the Copenhagen climate change conference held recently [1]. Energy conservation and emission reduction, the development of low-carbon technology has become the strongest voice of the times. Therefore, low-carbon lighting has also come out one after another, and has received much attention.

Building a conservation-oriented society has become an important national policy in China. All walks of life must conscientiously do a good job in energy conservation, land saving, material saving and water saving. The lighting industry is no exception [2]. The national “Eleventh Five-Year Plan” requires that the energy consumption per unit of GDP be reduced by about 20%. The Ministry of Construction has issued the “Outline of Green Lighting Planning for the Eleventh Five-Year Plan”, which clearly requires “the end of 2005 as the base, the annual urban lighting festival. The electricity target is 5%, and the cumulative power saving is 25% in 5 years (2006-2010). Lighting standards and regulations are not only the basis for the construction of lighting projects, but also an important criterion for evaluating lighting engineering design solutions and lighting effects. The principle of doing things according to standard standards should be highly valued by design, construction and management personnel. Standards and design have become an important guarantee for implementing low-carbon lighting.

2 Design criteria to be followed for low carbon lighting

2.1 China's lighting engineering construction standard system [3]

Saving energy, protecting the environment and improving lighting quality are our mission to implement low-carbon lighting. The premise of saving energy is to meet people's normal visual needs, that is, to meet the requirements of lighting design standards, and should not blindly emphasize energy saving and reduce the amount of illumination (illuminance) and quality (glare, illuminance uniformity, color, glare, etc.) ) requirements. The standard system for engineering construction in China has been relatively well established, and different lighting sites have formulated or are in the process of formulating corresponding design and measurement standards (see Table 1). These standards are formulated for people's visual work needs, have certain scientific and feasibility, and try to be close to international standards, with certain advancement.

Table 1 China's lighting design, measurement standards

2.2 "Architectural Lighting Design Standards" (GB50034-2004) [6]

The building's lighting evaluation indicators are specified in the standard: maintenance average illuminance value, illuminance uniformity, color rendering index, uniform glare value, and lighting power density limit (LPD) on the working surface or reference plane.

The standard content system is comprehensive, which includes quantitative indicators (such as illuminance), quality indicators (illuminance uniformity, glare limitation, light source color, color rendering, reflectance, etc.), lighting power density limits, Lighting distribution and control, etc. It covers lighting standards and energy-saving standards for residential buildings, public buildings and industrial buildings, as well as “light management and supervision” for implementation. It forms a relatively complete architectural lighting design standard and fills the gap in architectural lighting design standards.

A major change in the standard is the increase in the maximum allowable value of the lighting power density (LPD) for 108 common rooms or locations in seven types of buildings, including office, residential, commercial, hotel, hospital, school, and industrial. It is the first initiative, which has greatly promoted energy conservation, environmental protection and sustainable social and economic development. In addition to the current value, the target value is also specified, which is somewhat forward-looking. In addition to residential buildings, the LPD limits of the other six types of buildings are mandatory because they involve the lighting energy efficiency limits of these large-scale buildings, which require less electricity to generate more light. It is an important issue to effectively save energy and protect the environment in the field of lighting and to ensure the comprehensive and systematic implementation of green lighting projects. Specifying the LPD limits will require a comprehensive consideration and consideration of illumination levels, lighting quality and lighting energy efficiency in lighting design, and promote the application of more efficient light sources, ballasts, lamps and other products in the design.

The standard technology is advanced, with certain innovation and forward-looking, and plays an important role in saving energy, protecting the environment, improving lighting quality, implementing green lighting, promoting the advancement of lighting technology and promoting the promotion of high-efficiency lighting products. Its content and technical level have reached the level of international similar standards.