| 摘要 |
[Problem] To present a solar heat collecting pipe capable of enhancing the heat collecting efficiency by suppressing the dissipation of energy transmitted to the heat medium passing through the inside of an inner pipe. [Solving Means] In the solar heat collecting pipe 1 including the inner pipe 11 for receiving sunlight collected by the light collecting mechanism 2, and transmitting energy to the heat medium 14 passing through the inside, and the outer pipe 12 covering the outer circumference of the inner pipe 11, a solar heat absorbing film 11a is applied in a portion exposed to sunlight of the inner pipe 11 of the solar heat collecting pipe 1 (the portion exposed to the reflected light of the sunlight at least on the surface of the inner pipe 11, and a heat reflecting film 11b is applied in a portion not exposed to sunlight from the light collecting mechanism 2.
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