Integrated micro-lens for photovoltaic cell and thermal applications

    公开(公告)号:US11302839B2

    公开(公告)日:2022-04-12

    申请号:US16038567

    申请日:2018-07-18

    摘要: A design for a micro-lens (i.e., a lens on the scale of micrometers) incorporates existing nanofabrication techniques and can be incorporated into High Concentrating Photovoltaic (HCPV), solar thermal collectors, and traditional flat PV systems. Using the theory of wave optics, the design is able to achieve a high numerical aperture, i.e., it can receive light over a wider range of angles. The design also reduces the distance the focal point shifts as the light source shifts; this eliminates the need for a tracking system in CPV and PV applications. Reducing the lens size also facilitates smaller, lightweight CPV systems, which makes CPV attractive for additional applications. Finally, these concentrators reduce the exchanging area of a typical flat solar thermal system where heat is received, which improves the overall system's efficiency and allows its use also during rigid winter time.

    BUILDING FRAME AND METHOD FOR ADJUSTING THE TEMPERATURE IN A BUILDING

    公开(公告)号:US20200378620A1

    公开(公告)日:2020-12-03

    申请号:US16995284

    申请日:2020-08-17

    发明人: Julian BERCHTOLD

    摘要: A building envelope, in particular a wall, a floor, or a roof of a building with at least two shells spaced some distance apart from one another, which encloses an intermediate space, said space being essentially empty with the exception of weight-bearing and/or construction-engineering elements or being filled at least in sections with porous, open-celled material and sealed from the interior and exterior of the building, wherein controllable sealing means are provided for sealing the intermediate space from the interior and exterior and optionally separated building envelope sections from one other.

    Hybrid solar collector and operating procedure

    公开(公告)号:US10177709B2

    公开(公告)日:2019-01-08

    申请号:US15245069

    申请日:2016-08-23

    发明人: Giuseppe Fent

    摘要: The invention relates to a hybrid solar collector that generates thermal and electrical energy while maintaining a comfortable indoor climate. The hybrid solar collector comprises a thermal energy collector for time-delayed transfer of thermal energy resulting from incident solar energy into building walls having a rear-vented cover arranged so that an air gap is formed between the solid collector portion and the cover, said cover comprising photovoltaic (PV) elements and being at least partially transparent and/or partially translucent so as to allow solar radiation to impinge on the solid thermal collector, wherein the air in the gap between the cover and the collector is sucked by a heat pump preferably for use in heating water or thermal storage The hybrid solar collector of the invention stores thermal energy in and releases thermal energy from the thermal collector portion, while also generating electricity using the PV elements and utilizing thermal energy from the heated air in the air gap. Operating procedures include targeted air flow and heat recuperation. The system may be used to retrofit existing thermal solar cells with incident-angle-selective structure.