GB 4271-1984 Test method for thermal performance of flat-plate solar collectors

Scope: This standard applies to flat-plate solar collectors with liquid working medium, and in principle also applies to flat-plate solar collectors and vacuum tube collectors with gas working medium. It is not suitable for flat-plate solar collectors whose working fluid is a two-phase mixture. This standard applies to flat-plate solar collectors with only a single inlet and a single outlet. For flat-plate solar collectors with more than one inlet or outlet, if the average physical properties of the working fluid flowing into and out of the flat-plate solar collectors can be obtained, the test can also be carried out according to this standard. This standard does not apply to heat storage solar collectors, unless the heat storage process can be separated from the entire heat collection process. The method described in this standard is suitable for testing under outdoor solar irradiation. It is also suitable for tests under simulated solar irradiation indoors.

2021 GB/T 4271-2021 Test methods for the performance of solar collectors　
2007 GB/T 4271-2007 Test methods for the thermal performance of solar collectors
2000 GB/T 4271-2000 Test methods for the thermal performance of flat plate solar collectors
1984 GB 4271-1984 Test method for thermal performance of flat-plate solar collectors

GB 4271-1984 was changed to GB/T 4271-2000 Test methods for the thermal performance of flat plate solar collectors.

GB 4271-1984Test method for thermal performance of flat-plate solar collectors