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Patent Searching and Data


Title:
SOLAR HEAT COLLECTING TUBE AND SOLAR THERMAL POWER GENERATING DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/002493
Kind Code:
A1
Abstract:
This solar heat collecting tube (1) comprises: an inner tube (2) through which a heat transfer medium (6) can flow; an outer tube (3) that envelops the outer circumference of the inner tube (2) and forms an annular insulating space with the inner tube (2); and a thermal expansion differential absorbing means (8) for absorbing differences in thermal expansion between the inner tube (2) and the outer tube (3). The outer tube (3) is a glass tube with a first anti-reflective film formed on the inner face of the glass tube and a second anti-reflective film formed on the outer face of the glass tube. The second anti-reflective film is more durable in the external environment than the first anti-reflective film, and the first anti-reflective film has a higher light transmittance than the second anti-reflective film. This solar heat collecting tube (1) can achieve both improved light transmittance and improved durability in the external environment.

Inventors:
HOMMA, Takayuki (2-1 Toyoda-cho, Kariya-sh, Aichi 71, 〒4488671, JP)
Application Number:
JP2016/065583
Publication Date:
January 05, 2017
Filing Date:
May 26, 2016
Export Citation:
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Assignee:
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI (2-1 Toyoda-cho, Kariya-shi Aichi, 71, 〒4488671, JP)
International Classes:
F24J2/24; F24J2/48
Attorney, Agent or Firm:
SOGA, Michiharu et al. (S. Soga & Co, 8th Floor Kokusai Building, 1-1, Marunouchi 3-chome, Chiyoda-k, Tokyo 05, 〒1000005, JP)
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