Test Background
The flat-plate solar collector heat absorber is a component in the flat-plate solar collector that absorbs solar radiation energy and transfers heat to the heat transfer medium. It is basically a flat plate shape. The high-temperature durability test of the solar collector absorber can determine the high-temperature durability performance of the solar collector absorber.
Zhongke Testing Reliability Experiment Center has the reliable performance of various solar collector absorbers and provides professional high-temperature durability test services for solar collector absorbers.
Scope of tests
is divided into: copper, aluminum alloy, copper-aluminum composite, stainless steel, galvanized steel, plastic, rubber, etc. according to material type.
According to the structural form, it is divided into: tube plate type, wing tube type, flat box type, and snake tube type.
According to the type of coating, it is divided into: non-selective absorption coating and selective absorption coating.
Test method
1. Take 3 samples from the heat absorber, test the solar absorption ratio and normal emission ratio respectively according to the requirements of GB/T 25968 and GB/T 25965, take the average value, and retain 2 decimal places.
2. After the sample is tested for high-temperature durability in accordance with the requirements of GB/T 26974-2011, the solar absorption ratio and normal emission ratio are tested again in accordance with the requirements of GB/T 25968 and GB/T25965, and the average value is taken and retained to 2 decimal places.
3. Test the coating adhesion according to the requirements of GB/T1720. After the test, the coating and substrate should be free of cracks, blisters, and peelings, the optical performance attenuation coefficient of the heat absorber surface should be ≤ 0. 05, and the adhesion should reach level 1 specified in GB/T 1720.
Test standard:
NB/T 34072-2018 Technical specifications for weather resistance of flat-plate solar collector absorbers
NB/T 34072-2018 Technical specifications for weather resistance of flat-plate solar collector heat absorbers
GB/T1720 Paint film adhesion determination method
GB/T 1865 Paints and varnishes Artificial weathering and artificial radiation exposure Filtered xenon arc radiation
GB/T6682 Analytical laboratory water specifications and test methods
GB/T12936 Solar thermal utilization terminology
GB/T 25965 Test method for normal emission ratio of materials and hemispheric emission ratio of all-glass vacuum solar collector tubes
GB/T 25968 Spectrophotometer test method for measuring solar transmittance and solar absorption of materials
GB/T 26974-2011 Technical requirements for flat plate solar collector absorbers
