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This standard is developed in accordance with the rules given in GB/T 1.1-2009 Directives for standardization—Part 1: Structure and drafting of standards.
This standard was proposed by and is under the jurisdiction of China Electrical Equipment Industry Association.
This standard is issued for the first time.
Technical requirement and test method of the floating body of floating PV system
1 Scope
This standard specifies the environmental conditions, technical requirements, test methods, inspection items and classification of the floating body of floating PV system.
This standard is applicable to floating bodies, including materials and bolts, which are produced by using medium (high) density polyethylene as the main raw material as well as additives.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 1033.1-2008 Plastics—Methods for determining the density of non-cellular plastics —Part 1: Immersion method, liquid pyknometer method and titration method
GB/T 1034-2008 Plastics—Determination of water absorption
GB/T 1040.1-2006 Plastics—Determination of tensile properties—Part 1: General principles
GB/T 1040.2-2006 Plastics—Determination of tensile properties—Part 2: Test conditions for moulding and extrusion plastics
GB/T 1040.3-2006 Plastics—Determination of tensile properties—Part 3: Test conditions for films and sheets
GB/T 1043.1-2008 Plastics—Determination of charpy impact properties—Part 1: Non-instrumented impact test
GB/T 1633-2000 Plastics—Thermoplastic materials—Determination of Vicat softening temperature (VST)
GB/T 1842-2008 Plastics—Test method for environmental stress-cracking of polyethylene
GB/T 2408-2008 Plastics—Determination of burning characteristics—Horizontal and vertical test
GB/T 2411-2008 Plastics and ebonite—determination of indentation hardness by means of a durometer (shore hardness)
GB/T 2423.7 Environmental testing—Part 2: Test methods—Test Ec: Rough handling shocks, primarily for equipment-type specimens
GB/T 5465.2-2008 Graphical symbols for use on electrical equipment—Part 2: Graphical symbols
GB/T 5470-2008 Plastics—Determination of the brittleness temperature by impact
GB/T 6672-2001 Plastics film and sheeting—Determination of thickness by mechanical scanning
GB/T 9341-2008 Plastics—Determination of flexural properties
GB/T 9352-2008 Plastic—Compression moulding of test specimens of thermoplastic materials
GB/T 16422.3-2014 Plastics—Methods of exposure to laboratory light sources—Part 3: Fluorescent UV lamps
GB/T 17219-1998 Standard for safety evaluation of equipment and protective materials in drinking water system
GB/T 17643-2011 Geosynthetics—Polyethylene geomembrane
GB/T 19466.6-2009 Plastics—Differential scanning calorimetry (DSC)—Part 6: Determination of oxidation induction time (isothermal OIT) and oxidation induction temperature (dynamic OIT)
GB/T 50621 Technical standard for on-site inspection of steel structures
JC/T 1050 Classification and test method of slip resistance for ground stones
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
floating body
minimum unit of floating system on the water surface for installing photovoltaic modules or supporting key equipment of photovoltaic power generation system or for other auxiliary functions
3.2
connection pin
connection between floating bodies
4 Environmental conditions
The floating body is used if
a) the wave height on the water surface is not higher than 0.5m;
b) the water velocity is not higher than 0.51m/s;
c) the wind speed is not higher than 36m/s;
d) ambient temperature is -25°C~45°C;
e) snow load is not higher than 0.45kN/m2.
5 Technical requirements
5.1 General
The floating body mainly includes a main floating body and an auxiliary floating body. The main floating body generally consists of a body, connecting bolts, connection pins and component mounting members. The auxiliary floating body mainly consists of a body, connection pins and connecting bolts. The floating body used for fixing with the anchoring system shall also include the mounting member of anchoring system. Each part shall meet the relevant requirements of this standard.
5.2 Materials
5.2.1 General requirements
Recycled materials are not allowed for floating materials (recycled materials do not include flash produced in the production process). The environmental protection properties, physical properties, mechanical properties, thermal properties, weather resistance and fire resistance of floating materials shall meet the requirements of the following clauses.
5.2.2 Environmental protection properties
The floating body shall not pollute the water, and the test results shall meet the hygiene requirements of Table 1 in GB/T 17219-1998.
5.2.3 Physical properties
5.2.3.1 Material density
The density of floating material shall not be less than 0.930g/cm3.
5.2.3.2 Water absorption
The water absorption mass fraction of floating materials shall not exceed 0.1%.
5.2.3.3 Environmental stress cracking time
The environmental stress cracking time (F50) of floating materials shall not be less than 1000h.
5.2.4 Mechanical properties
5.2.4.1 Tensile properties
The tensile properties of floating materials shall meet the requirements in Table 1.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Environmental conditions
5 Technical requirements
5.1 General
5.2 Materials
5.3 Floating body
6 Test method
6.1 Materials
6.2 Floating body
7 Inspection items and classification
7.1 Inspection classification
7.2 End-of-manufacturing inspection
7.3 Type test
7.4 Inspection items
