Control method for optimizing solar-to-power efficiency of solar-aided coal-fired power system under off-design working conditions

    公开(公告)号:US20220145779A1

    公开(公告)日:2022-05-12

    申请号:US17606042

    申请日:2021-01-25

    摘要: A control method for optimizing a solar-to-power efficiency of a solar-aided coal-fired power system under off-design working conditions is provided. Through reading the relevant information of the solar collecting system, the coal-fired power generation system, the environmental conditions, and the working conditions of the solar-aided coal-fired power system, the water flow rate range able to be heated by the solar collecting unit and the solar-coal feedwater flow distribution ratio range of the solar-aided coal-fired power system are determined; through establishing the relationship between the solar-to-power efficiency and the solar-coal feedwater flow distribution ratio of the solar-aided coal-fired power system under the off-design working conditions, the solar-coal feedwater flow distribution ratio is regulated, so that a flow rate of water entering the solar collecting system to be heated is controlled, thereby maximizing the solar-to-power efficiency and improving the economy of the solar-aided coal-fired power system under the off-design working conditions. The present invention provides clear guidance to optimize the solar-aided coal-fired power system under the off-design working conditions, enable solar energy to fully play its role in the solar-aided coal-fired power system, improve the utilization rate of solar energy, facilitate the consumption of the renewable energy, and greatly increase the economy of the solar-aided coal-fired power system.

    Robotic solar panel cleaning system

    公开(公告)号:US10771008B2

    公开(公告)日:2020-09-08

    申请号:US15668873

    申请日:2017-08-04

    摘要: A cleaning system for a solar panel is provided. The cleaning system comprises: i) a frame moveable in a transverse direction over the solar panel, the frame having edges oriented in the transverse direction; a brush assembly positioned within the frame and moveable in a longitudinal direction including a plurality brush holders arranged within the frame, with each brush holder being adapted to interchangeably receive a brush for cleaning the solar panel; and a liquid spray arrangement including nozzles arranged one or more rows for spraying at least one of water and a water detergent mix onto the solar panel. The liquid spray arrangement includes nozzles positioned near at least one of the transverse edges of the frame for spraying the water detergent mix onto a longitudinal end of the brush assembly.

    Thermal cell panel system for heating and cooling and associated methods

    公开(公告)号:US11143437B2

    公开(公告)日:2021-10-12

    申请号:US16423887

    申请日:2019-05-28

    发明人: Stewart Kaiser

    摘要: A thermal cell panel system for heating and cooling using a refrigerant includes a plurality of solar thermal cell chambers, and a piping network for a flow of the refrigerant through the plurality of solar thermal cell chambers. In addition, the system includes a compressor having a motor coupled to a variable frequency drive (“VFD”), where the compressor is coupled to the piping network upstream of the plurality of solar thermal cell chambers and the VFD is configured to adjust a speed of the motor in response to the pressure of the refrigerant within the plurality of solar thermal cell chambers. The piping network includes an inlet manifold coupled to the inlet of each solar thermal cell chamber, and an outlet manifold coupled to the outlet of each solar thermal cell chamber.

    METHOD FOR PREDICTIVE CONTROL OF THE ORIENTATION OF A SOLAR TRACKER

    公开(公告)号:US20210184625A1

    公开(公告)日:2021-06-17

    申请号:US17187067

    申请日:2021-02-26

    申请人: NEXTracker Inc.

    摘要: A method for controlling the orientation of a single-axis solar tracker orientable about an axis of rotation, including observing the evolution over time of the cloud coverage above the solar tracker; determining the evolution over time of an optimum inclination angle of the solar tracker substantially corresponding to a maximum of solar radiation on the solar tracker, depending on the observed cloud coverage; predicting the future evolution of the cloud coverage based on the observed prior evolution of the cloud coverage; calculating the future evolution of the optimum inclination angle according to the prediction of the future evolution of the cloud coverage; servo-controlling the orientation of the solar tracker according to the prior evolution of the optimum inclination angle and depending on the future evolution of the optimum inclination angle.

    SOLAR POWER GENERATION PLANT INSTALLABLE ON AGRICULTURAL INSTALLATIONS

    公开(公告)号:US20200329647A1

    公开(公告)日:2020-10-22

    申请号:US16643067

    申请日:2018-09-10

    申请人: REM TEC S.R.L.

    摘要: A power generation plant includes a support structure formed by supporting piles aligned fastened to the ground, such structure being a bi-dimensional structure placed on an agricultural land, with any orientation. The power generation plant further includes a handling system for solar energy receptor devices placed on the piles arranged in a row, adapted to allow the handling of such devices around at least a first axis. The plant also includes one or more greenhouses for intensive cultivation of agricultural products, on the ground beneath such receptor devices, between rows of adjacent piles.

    Solar light hub and router device

    公开(公告)号:US10581373B2

    公开(公告)日:2020-03-03

    申请号:US15679234

    申请日:2017-08-17

    摘要: A concentrator and a solar light router for converting light energy into electrical, photochemical and thermal energy, among other possible forms of usable energy, comprising a fixed body (1) and a movable part (2), wherein the fixed body (1) has an upper side with a converging lens (4) through which the sun rays (R1) enter, and a lower side where a mirror (5) is arranged. The mobile part 2 has a support arm 7 having a lower leg 8 coupled to a movement unit 10, and an upper leg 9 extending above the converging lens 4, in which is displaceable mounted a module (11) receptor/router of convergent solar rays (R4) that emerges from the fixed body (1). The support (7) is connected to angular displacement means housed in the movement unit (10) so that the angle traveled by its arm (9) encompasses a virtual surface (17), defined between the converging lens (4) and the module (11), where a focal point (19) incise of the convergent rays (R4), that travels according to the curvilinear paths (18n) in accordance with the displacement of the sunlight captured by the converging lens (4). The module (11) presents a lower face (13) through which the converging solar rays (R4) enters, and an upper face (14) from which concentrated solar rays (R5) are emitted which are directed, for example, towards a solar energy converter receiver (20) arranged in a tower (T) spaced from the device. The module (11) is connected to translation means along the upper section (9) of the support (7) and to rotating means with respect to its axis (E1) transverse to the defined plane by the converging lens (4) and includes means detecting the positions of the focal point (19), which together with the angular arm displacement means (7) and the translational and rotational means of the module (11) are connected to a module position control and control unit (11) to maintain it facing the focal point (19) and facing the receiver/solar energy converter (20) of the tower (T). In an alternate realization, the module (11) may act as a solar energy receiver/converter, for which it may include solar cells, a thermoelectric motor, or other solar energy converters.

    AUTOMATIC HYDRAULIC MOTION SYSTEM OF ELEMENTS OF A COMPACT SOLAR COLLECTOR

    公开(公告)号:US20190226721A1

    公开(公告)日:2019-07-25

    申请号:US16316620

    申请日:2017-08-04

    申请人: CORDIVARI S.R.L.

    IPC分类号: F24S50/00 F24S40/52 F24S30/45

    摘要: Automatic motion system by dilatation of a fluid, said system acting on elements of a compact solar collector with integrated storage tank, said solar collector having least a face exposed to the solar radiation and at least another face not facing the solar radiation, said solar collector comprising a plurality of primary tubes (1), for containing at least one primary heat carrier element adapted to the storage of thermal energy, and an external sensor element arranged movable with respect to each primary conduit (1), adapted to overlap, at least partially, during its motion, in each primary conduit (1).

    Method for predictive control of the orientation of a solar tracker

    公开(公告)号:US11387774B2

    公开(公告)日:2022-07-12

    申请号:US17157989

    申请日:2021-01-25

    申请人: NEXTracker Inc.

    摘要: A method for controlling the orientation of a single-axis solar tracker (1) orientable about an axis of rotation (A), said method implementing the following steps: a) observing the evolution over time of the cloud coverage above the solar tracker (1); b) determining the evolution over time of an optimum inclination angle of the solar tracker (1) substantially corresponding to a maximum of solar radiation on the solar tracker (1), depending on the observed cloud coverage; (c) predicting the future evolution of the cloud coverage based on the observed prior evolution of the cloud coverage; d) calculating the future evolution of the optimum inclination angle according to the prediction of the future evolution of the cloud coverage; e) servo-controlling the orientation of the solar tracker (1) according to the prior evolution of the optimum inclination angle and depending on the future evolution of the optimum inclination angle. The present invention finds application in the field of solar trackers.