ABSORPTION TUBE ALLOWING EXPANSION AND RETRACTION OF COMPLEX SOLAR HEAT COLLECTING DEVICE

摘要

PURPOSE: An absorption tube which allows the expansion and retraction of a complex solar heat collecting device is provided to buffer the heat expansion or retraction of an absorption tube of the solar heat collecting device by forming a part of the absorption tube in the spiral or bellows shape, thereby minimizing the thermal stress and improving the heat transmission by converting the flow of a heat transmission medium to a turbulent flow. CONSTITUTION: An absorption tube which allows the expansion and retraction of a complex solar heat collecting device includes an outer circular glass tube(11), a curved reflection surface(12) formed on an inner surface of the outer circular glass tube, an inner circular glass tube(13) formed below the center of the reflection surface for reducing the heat loss of an absorption tube(14) which absorbs reflection light from the reflection surface, and the absorption tube formed inside of the inner circular glass tube, wherein the absorption tube is partially formed in the spiral or bellows shape.