GB/T 40858-2021 General requirements and test methods for receivers of solar thermal power plants

Scope

This document specifies the technical requirements, test methods, durability, and technical performance parameters for the heat collection pipes used in solar thermal power stations employing line-focused collectors to absorb focused solar radiation and transfer its thermal energy to the heat transfer fluid. The heat collection pipes described in this document consist of a heat-absorbing pipe and an insulating glass sleeve.
Note 1: Most of the test methods included in this document are applicable to heat collection pipes in parabolic trough solar thermal power stations and Fresnel solar thermal power stations.
This document includes definitions of the technical characteristics, geometric features, and performance parameters of heat collection pipes, as well as test methods for optical characteristics, heat loss, and durability.
Note 2: At present, there is insufficient experience with different test methods for heat collection pipes to determine which method is the best. This document describes all the different methods currently available, but does not define a recommended method.
For clarity, it is hereby stated that the heat loss test results described in this document do not represent the heat loss of heat collection pipes installed in the heat collection fields of commercial power stations.
The heat loss values obtained in indoor tests on a single heat collection pipe are significantly lower than the heat loss values under actual outdoor operating conditions in the heat collection fields of commercial power stations. Therefore, the indoor test procedures described in this document are suitable for comparing the performance of heat collection pipes.
The heat loss considered in the design of the heat collection field is obtained by testing a complete heat collector under actual solar conditions.

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