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GB 50033-2013

Chinese Standard: 'GB 50033-2013'
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Standard ID GB 50033-2013 (GB50033-2013)
Description (Translated English) Architectural lighting design standards
Sector / Industry National Standard
Classification of Chinese Standard P31
Classification of International Standard 91.120.01
Word Count Estimation 107,187
Older Standard (superseded by this standard) GB/T 50033-2001
Quoted Standard GB/T 5699
Drafting Organization China Academy of Building Research
Administrative Organization China Academy of Building Research
Regulation (derived from) Bulletin of the Ministry of Housing and Urban-Rural Development 1607
Summary This standard applies to the use of natural daylight civil and industrial buildings new construction, renovation and expansion project of lighting design.

P GB 50033-2013
Standard for Daylighting Design of
Jointly issued by the Ministry of Housing and Urban-Rural Development
(MHURD) and the General Administration of Quality
Supervision, Inspection and Quarantine (AQSIQ) of the
People's Republic of China
According to the requirements of Documents Jian Biao [2009] No.88 issued by Ministry
of Housing and Urban-Rural Development - "Notice on Printing and Publishing the
Development and Revision Plan of National Engineering Construction Standards in 2009",
this Standard was revised from the former standard of "Standard for Daylighting Design of
Buildings" by China Institute of Building Standard Design & Research jointly with all the
organizations concerned.
During the process of developing this Standard, the development team examined and
finalized it based on extensively soliciting for opinions by investigation and study, simulating
calculation, experimental verification, earnestly summarizing the practical experiences and
making reference to the relevant international standards and foreign advanced standards.
This standard comprises seven chapters and five appendices and the main technical
content includes general principles, terms and symbols, basic requirements, standard value for
daylight, daylighting quality, daylighting calculation and daylighting energy efficiency.
The main technical contents of this revision are.
1. The minimum daylighting factor side daylighting evaluation index was changed to
average daylighting coefficient; critical illumination value of indoors natural light was
changed to design illuminance value of indoor natural light.
2. The application scope the Standard was expanded, and the standard value for
daylighting of exhibition building, traffic building and sports building were added.
3. Calculation method corresponding to average daylighting factorwas given.
4. The chapter "daylighting energy efficiency" was newly-added and the calculation
method of daylighting energy efficiency was specified.
The provisions printed in bold type in this Standard are compulsory and must be
enforced strictly.
Ministry of Housing and Urban-Rural Development is in charge of the administration of
this standard and the explanation of the compulsory provisions. China Academy of Building
Research is responsible for the explanation of specific technical contents. During the process
of implementing this standard, the relevant opinions and advice, whenever necessary, can be
posted or passed on to Architecture Environment and Energy Efficiency Institute China
Academy of Building Research (address. No. 30, North 3rd Ring East Road, Beijing, China,
Chief development organization. China Academy of Building Research
Participating development organization of this Standard.
China Architecture Design and Research Group
Beijing Institute of Architectural Design Co., Ltd.
Tsinghua University
China Academy of Urban Planning & Design
China Aviation Planning and Construction Development Co., Ltd.
Shanghai Planning, and Land Resources Administration Bureau
Suzhou Solatube Daylight Technology Co.,Ltd.
Beijing Kebohua Building Materials Co., Ltd.
Foreword ... I
1 General Provisions ... 1
2 Terms and Symbols ... 1
2.1 Terms ... 1
2.2 Symbols ... 2
3 Basic Requirements ... 4
4 Standard Value for Daylight ... 5
5 Daylighting Quality ... 12
6 Daylighting Calculation... 13
7 Daylighting Energy Saving ... 17
Appendix A Daylight Climate Zone of China ... 19
Appendix B Discomfort Glare of Window... 22
Appendix C Daylighting Calculation Method... 23
Appendix D Daylighting Calculation Parameters ... 30
Appendix E Daylighting Energy Saving Calculation Parameters ... 38
Explanation of Wording in This Code ... 39
List of Quoted Standards ... 40
11 General Provisions
1.0.1 This Standard was formulated with a view to implement national laws and regulations
and technical and economic policies, fully utilize natural light, create good light environment,
save energy, protect environment and construct green building in the architectural lighting
1.0.2 This Standard is applicable to the daylighting design of constructed, renovated and
extended engineering of civil buildings and industrial buildings utilizing natural daylight.
1.0.3 The architectural lighting design shall be technology-advanced, economically
reasonable and in favor of visual work and physical and mental health.
1.0.4 Architectural lighting design shall not only comply with this Standard but also comply
with those in the current relevant ones of the nation.
2 Terms and Symbols
2.1 Terms
2.1.1 Reference surface
It refers to the faces measured or with specified illuminance
2.1.2 Illuminance
The illuminance at any point on a surface is the quotient of the luminous flux irradiating
onto the surface element (including this point) divided by the area of this surface element.
2.1.3 Exterior illuminance
It refers to the illuminance on the exterior horizontal plane without shading under the
irradiation of the diffused light from the sky.
2.1.4 Interior illuminance
It refers to the illuminance at a point of the interior horizontal plane under the irradiation
of the diffused light from the sky.
2.1.5 Daylight factor
It is the ratio of illuminance generated from receiving the diffuse sky radiation light
distrubuted in the assumed and known sky illumulance directly and indirectly and the diffuse
sky radiation illuminance generated on the external horizontal plane without shading from the
sky half.
2.1.6 Standard value of daylight factor
It is the daylighting effient value where the visual function requirements are met under
the specified exterior natural light design illuminance.
2.1.7 Design illuminance of exterior daylight
The minimum illuminance of exterior natural light with only natural light utilized.
2.1.8 Standard value of interior daylight illumlnance
It correspond to the specified exterior natural light design illuminance value and the
illuminance value for reference planes with the standard value for appropriate daylighting
2.1.9 Daylight climate
2 It refers to the natural light status formed by vertical incident solar rays, diffuse sky
radiation light and ground-reflected light
2.1.10 Annual average total illuminance
It refers to the total illumination of exterior natural light according to statistics in
specified annual time.
2.1.11 Daylight climate coefficient
Zone factordetermined by the average total illumination value according to the daylight
climate characteristics.
2.1.12 Critical illuminance of exterior daylight
It refers to the exterior natural illumination where all the artificial lighting are required to
be opened indoors.
2.1.13 Uniformity of daylighting
It refers to the ratio of minimum daylighting factorvalue and the mean value for
reference planes.
2.1.14 Discomfort glare
Uncomfortable visual conditions are caused due to the unsuitable distribution of
lightness and the existence of extreme brightness contrast in space and time in the field of
vision. Discomfort glare in this Standard refers to the discomfort glare caused by the windows
in particular.
2.1.15 Ratio of glazing to floor area
It refers to the ratio between the window opening area and ground ara. As for the side
daylighting, the window opening area above the reference planes shall be adopted.
2.1.16 Depth of daylighting zone
It refers to the depth of the room meeting the daylighting requirements in side
daylighting. In this Standard, it is expressed with the ratio of room depth and the height from
the reference planes to the win...
Related standard: GB 50034-2013    GB/T 38539-2020
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