Complementary Concentrating Solar LED Lighting Device and Its Application in Architectural Design

2021 ◽  
Vol 16 (7) ◽  
pp. 1120-1128
Author(s):  
Xianchao Liang ◽  
Rui Wang ◽  
Hong Li
Keyword(s):  
Solar Energy ◽  
High Performance ◽  
Architectural Design ◽  
Light Transmission ◽  
Divide And Conquer ◽  
Power Module ◽  
Optical Efficiency ◽  
Led Lighting ◽  
Lighting Device ◽  
Synchronous Rectifier

The shortcomings of solar LED lighting concentrators and divide and conquer power module are analyzed, and a new set of solar LED lighting devices is proposed. From the aspect of concentrating solar energy, the device redesigns the structure of the existing symmetrical inner wall lens composite parabolic concentrator (SLCPC) by comprehensively using the principles of solar photovoltaic power generation and light transmission lighting. With the assistance of an optimized coating strategy, a part of the incident solar energy is introduced into the indoor lighting (TSLCPC) to realize energy complementary without affecting the optical performance of SLCPC. Meanwhile, it adopts a bidirectional synchronous rectifier DC-DC converter with Buck-Boost as the main topology. The lighting device takes single-chip microcomputer PIC16F887 as the main control chip, which has high-performance and low power consumption. A bidirectional synchronous rectifier DC-DC converter is adopted to realize MPPT control and LED drive. The hardware design of the device is also given. In the test, although the waveform of the bidirectional DC-DC converter has some burr in forward and reverse operation, the measurement accuracy remains stable, which verifies the feasibility of the device circuit. TSLCPC has the same optical efficiency as SLCPC, and it uses escape light to improve the utilization of solar energy. The effective light-receiving angle of TSLCPC and SLCPC ranges from −30° to 30°. When the system is introduced into the buildings in Hefei, it is found that the installation angle exerts a significant impact on lighting performance of TSLCPC, and then affects the lighting performance to a certain extent. However, it is generally acceptable.

High-performance light transmission based on graphene plasmonic waveguides

2020 ◽  
Vol 8 (20) ◽  
pp. 6832-6838 ◽  
Author(s):  
Da Teng ◽  
Kai Wang ◽  
Qiongsha Huan ◽  
Weiguang Chen ◽  
Zhe Li
Keyword(s):  
High Performance ◽  
Light Transmission ◽  
Optical Field ◽  
Plasmonic Waveguides ◽  
Rib Waveguide

Tunable ultra-deep subwavelength optical field confinement is reported by using a graphene-coated nanowire-loaded silicon nano-rib waveguide.

Efficient Co-Harvesting of Solar Energy and Low-Grade Heat by Molecular Photoswitches for High Energy Density, Long-Term Stable Solar Thermal Battery

2019 ◽  
Author(s):  
Zhao-Yang Zhang ◽  
Tao LI
Keyword(s):  
Energy Density ◽  
Solar Energy ◽  
High Performance ◽  
High Energy ◽  
Solar Thermal ◽  
High Energy Density ◽  
Low Grade ◽  
Thermal Battery ◽  
Low Grade Heat

Solar energy and ambient heat are two inexhaustible energy sources for addressing the global challenge of energy and sustainability. Solar thermal battery based on molecular switches that can store solar energy and release it as heat has recently attracted great interest, but its development is severely limited by both low energy density and short storage stability. On the other hand, the efficient recovery and upgrading of low-grade heat, especially that of the ambient heat, has been a great challenge. Here we report that solar energy and ambient heat can be simultaneously harvested and stored, which is enabled by room-temperature photochemical crystal-to-liquid transitions of small-molecule photoswitches. The two forms of energy are released together to produce high-temperature heat during the reverse photochemical phase change. This strategy, combined with molecular design, provides high energy density of 320-370 J/g and long-term storage stability (half-life of about 3 months). On this basis, we fabricate high-performance, flexible film devices of solar thermal battery, which can be readily recharged at room temperature with good cycling ability, show fast rate of heat release, and produce high-temperature heat that is >20<sup> o</sup>C higher than the ambient temperature. Our work opens up a new avenue to harvest ambient heat, and demonstrate a feasible strategy to develop high-performance solar thermal battery.

Efficient Co-Harvesting of Solar Energy and Low-Grade Heat by Molecular Photoswitches for High Energy Density, Long-Term Stable Solar Thermal Battery

2019 ◽  
Author(s):  
Zhao-Yang Zhang ◽  
Tao LI
Keyword(s):  
Energy Density ◽  
Solar Energy ◽  
High Performance ◽  
High Energy ◽  
Solar Thermal ◽  
High Energy Density ◽  
Low Grade ◽  
Thermal Battery ◽  
Low Grade Heat

Solar energy and ambient heat are two inexhaustible energy sources for addressing the global challenge of energy and sustainability. Solar thermal battery based on molecular switches that can store solar energy and release it as heat has recently attracted great interest, but its development is severely limited by both low energy density and short storage stability. On the other hand, the efficient recovery and upgrading of low-grade heat, especially that of the ambient heat, has been a great challenge. Here we report that solar energy and ambient heat can be simultaneously harvested and stored, which is enabled by room-temperature photochemical crystal-to-liquid transitions of small-molecule photoswitches. The two forms of energy are released together to produce high-temperature heat during the reverse photochemical phase change. This strategy, combined with molecular design, provides high energy density of 320-370 J/g and long-term storage stability (half-life of about 3 months). On this basis, we fabricate high-performance, flexible film devices of solar thermal battery, which can be readily recharged at room temperature with good cycling ability, show fast rate of heat release, and produce high-temperature heat that is >20<sup> o</sup>C higher than the ambient temperature. Our work opens up a new avenue to harvest ambient heat, and demonstrate a feasible strategy to develop high-performance solar thermal battery.

Innovative High Density Power Module for E-Scooter Motor Using a High Performance Insulated Metal Substrate

2021 ◽  
Author(s):  
Kuo-Shu Kao ◽  
Sheng-Tsai Wu ◽  
Ji-Yuan Syu ◽  
Tao-Chih Chang ◽  
Chang-Chun Lee
Keyword(s):  
High Performance ◽  
Metal Substrate ◽  
High Density ◽  
Power Module

Parabolic Solar Collector Coverage Made of High-Performance Concrete with Addition of Active Rice Husk Silica Integrated to a Biomass Thermoelectric Unit

2014 ◽  
Vol 634 ◽  
pp. 72-82
Author(s):  
Rosa Ana Conte ◽  
Daltro Garcia Pinatti ◽  
Luiz Fernando M. Marton ◽  
Sebastião Ribeiro ◽  
Thaís Witt Acosta ◽  
...  
Keyword(s):  
Solar Energy ◽  
Rice Husk ◽  
Solar Collector ◽  
High Performance ◽  
High Performance Concrete ◽  
Electrical Energy ◽  
Energy Generation ◽  
Boiler Water ◽  
Rice Husk Silica ◽  
Short Rotation

Production of active rice husk silica (ARHS) in bubbling fluidized bed boiler of a thermoelectric unit (TEU) and its addition to high performance concrete (HPC) with a compression resistance of 90 MPa was developed in the last 10 years. A first factory in Brazil was established at Alegrete town, RS, and other factories are under planning. Data of ARHS production, specification and HPC trace are presented. Design of parabolic solar collector coverage (PSCC) for air heating for biomass drying in a special silo of the TEU is presented as well. Cost of HPC/ARHS is 10 times less than steel (USD 200/ton vs. USD 2000/ton, specific mass 2.5 vs. 7.6 g/cm3, respectively). Those characteristics allow simultaneous solution of four ecological problems: large span coverage, rain water collection, daily solar energy collection and storage, and drying of biomass. The integration of those characteristics results in decrease of biomass consumption maintaining the same UTE efficiency. Tracking parabolic solar collector can be avoided between Cancer and Capricorn Tropics, and it is sufficient its eastern-western orientation with inclination to the Equator by the latitude angle. Coverage of the area occupied by TEU is sufficient to dry its biomass consumption. Preheating of boiler water with solar energy is possible decreasing biomass consumption in sunny days; biomass is partially consummed at night and cloudy days. Coupling the above technologies with high pressure steam TEU and fast-growing short-rotation forest gives to the biomass electrical energy generation a competitive economical position with hydraulic, coal, natural gas, and aeolic energy generation.

Templating Synthesis of Natural Cotton-based Hierarchically Structured Carbon Hollow Microfibers for High-performance Solar Vapor Generation

2021 ◽  
Author(s):  
Shijun Lei ◽  
Dali Huang ◽  
Shuhao Liu ◽  
Mingfeng Chen ◽  
Rong Ma ◽  
...  
Keyword(s):  
Solar Energy ◽  
Water Scarcity ◽  
High Performance ◽  
Saline Water ◽  
Solar Thermal ◽  
Vapor Generation ◽  
Grand Challenges ◽  
Thermal Desalination ◽  
Templating Synthesis

Solar-thermal desalination by interfacial evaporation that leverages abundant solar energy to convert saline water into clean freshwater has promised an exciting alternative to meet the grand challenges of water scarcity....

LED Lighting Assessment for High-Performance Stadium Illuminance

2021 ◽  
pp. 227-240
Author(s):  
Najmuddin Salmi bin Mat Nanyan ◽  
It Ee Lee ◽  
Gwo Chin Chung ◽  
Duu Sheng Ong
Keyword(s):  
High Performance ◽  
Led Lighting

A High Current (>1500A) Power Module for High Temperature, High Performance Applications Using SiC TMOS Power Switches

2012 ◽  
Vol 2012 (HITEC) ◽  
pp. 000402-000406
Author(s):  
B. Passmore ◽  
J. Hornberger ◽  
B. McPherson ◽  
J. Bourne ◽  
R. Shaw ◽  
...  
Keyword(s):  
High Temperature ◽  
High Performance ◽  
Extreme Environment ◽  
Wide Bandgap ◽  
Power Module ◽  
Power Modules ◽  
Power Switches ◽  
Bandgap Semiconductors ◽  
Transition Times ◽  
Switch Position

A high temperature, high performance power module was developed for extreme environment systems and applications to exploit the advantages of wide bandgap semiconductors. These power modules are rated &gt; 1200V, &gt; 100A, &gt; 250 °C, and are designed to house any SiC or GaN device. Characterization data of this power module housing trench MOSFETs is presented which demonstrates an on-state current of 1500 A for a full-bridge switch position. In addition, switching waveforms are presented that exhibit fast transition times.

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