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In recent years, spectral crossover photovoltaic/thermal (CPV/T)composite technology has attracted much attention by decoupling the crossover from the heat of the PV cell and avoiding problems such as ultratemperature of the PV cell and restricted taste of the system output thermal energy. However, the research in this field mainly focuses on simulation calculations and lacks experimental studies on thermal and electrical performance under actual meteorological and lighting conditions. In order to investigate the real operating performance of outdoor CPV/T systems, this paper builds a lowfrequency concentrated light crossover CPV/T system and a nonconcentrated light PV system, and compares and analyses the thermal and electrical output characteristics under concentrated light and nonconcentrated light conditions. The effects of the optical properties of the frequencysharing liquid on the thermal and electrical performance of the concentratingfrequencyshared CPV/T system are further investigated. The results show that the frequency divided CPV/T system has a higher electrical output power compared to the nonconcentrated PV system, with an electrical output power of 79.7 W and 72.9 W when using deionised water frequencydividing and silver/water nanofluid frequencydividing, respectively, compared to 45 W for the nonconcentrated PV system under the same conditions; meanwhile, after the frequencydividing liquid absorption characteristics are strengthened, the temperature of the cell is lowered, the filling factor is enlarged, and the cell At the same time, after the enhancement of the crossover liquid absorption property, the cell temperature is reduced, the filling factor is increased, the cell performance is improved, and the thermal efficiency of the system is increased by 2.7%, but the crossover liquid absorption property reduces the incident solar irradiation on the surface of the cell, which results in the reduction of the total electrical efficiency of the system by nearly 0.6%. Experimental data support is provided for a crossovertype CPV/T system at low convergence multiples.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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