共查询到18条相似文献,搜索用时 140 毫秒
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再论固定式光伏方阵最佳倾角的分析:兼评“固定式光伏方阵最佳倾角 总被引:1,自引:1,他引:0
负载全年均衡分布的独立固定式光伏方阵,在确定最佳倾角时应综合考虑方阵面上太阳辐射最的连续性,均匀性和极大性。最佳倾角与现场的地理位置及气象条件有关,而与负载大小,太阳电池及蓄电池容量等因素无关。 相似文献
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一种固定式光伏系统的设计方法 总被引:1,自引:0,他引:1
对于采用固定式方阵的地面光伏发电系统,其太阳能电池方阵功率和蓄电池容量的设计应综合考虑太阳辐射量,均匀性及多年的连续性。引入斜面辐射最佳系数Kop到太阳能电池方阵功率计算公式,以最大连续放电量来确定蓄电池的容量,太阳能电池方阵功率和蓄电池容量可迅速求出,兼顾了充电能力与放电储备问题,并保证一定的精度,简化了计算量。 相似文献
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太阳能电池发电系统中蓄电池的优化配置 总被引:1,自引:0,他引:1
在地面应用的固定式光伏方阵系统,其太阳能电池方阵和蓄电池的配置与太阳辐射的辐射量,均匀性,即与太阳辐射各月分布情况密切相关。本文研究了我国大部分地区的太阳辐射各月分布曲线,讨论了当分布曲线呈现多峰时的光伏系统的运行表现,提出以最大连续放电量来确定蓄电池的容量的计算公式。 相似文献
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季节性负载光伏方阵的倾角 总被引:4,自引:0,他引:4
朝向赤道的固定式光伏方阵最佳倾角除了取决于当地的气象和地理条件以外 ,还与负载的性质有关。研究了均衡性、季节性和临时性三种负载的特点。根据Hay提出的天空散射辐射各向异性的模型 ,计算了倾斜面上的太阳辐照量。分析结果表明 ,对于夏季耗电量多的“夏天型”负载 ,倾角应取方阵面上全年接收到最多太阳辐照量的角度 ,通常都小于当地纬度。对于冬季耗电量多的“冬天型”负载 ,在北半球 ,尽管 12月份耗电量最多 ,但不能取该月份接收到最多太阳辐照量的角度为方阵倾角 ,因为这样在夏天接收到的太阳辐射照量削弱太多。根据光控太阳能路灯的实例分析表明 ,“冬天型”负载所取方阵的最佳倾角比平均日耗电量相同的均衡性负载的最佳倾角 βopt大 5~ 10°较为合适 相似文献
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介绍了太阳能独立光伏发电在移动通信基站中的应用,重点介绍了太阳能独立光伏发电系统的组成、系统设计指导原则、移动通信基站的负载类型、太阳能阵列最佳倾角和蓄电池容量的计算步骤与方法等。 相似文献
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为使光伏组件获取更多的太阳辐照,需设置合适的倾角和方位角。通过2018年8月份在张北地区记录的辐照数据,计算得到张北地区光伏组件的最佳倾角。设置倾角为0°、30°、60°、90°、120°和150°的光伏组件,记录光伏组件的电压电流数据,分析不同天气下倾角和方位角对发电特性的影响。研究发现,光伏组件在该月的月最佳倾角为18.5°,晴天的日最佳倾角为27.1°,多云、阴天、雨天分别为18.0°、3.7°、0.2°。倾角对于发电特性的影响主要在于光伏组件接收的直射辐照大小,晴天和多云时30°倾角光伏组件的发电量最高,雨天和阴天水平光伏组件的发电量则最高。方位角对于发电特性的影响来源于直射辐照在一天中照射方向的变化,晴天和多云时方位角影响较大,阴天和雨天时影响很小。 相似文献
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Tilt angle and orientation greatly are influenced on the performance of the solar photo voltaic panels. The tilt angle of solar photovoltaic panels is one of the important parameters for the optimum sizing of solar photovoltaic systems. This paper analyses six different isotropic and anisotropic diffused solar radiation models for optimum tilt angle determination. The predicted optimum tilt angles are compared with the experimentally measured values for summer season under outdoor conditions. The Liu and Jordan model is found to exhibit t lowest error as compared to other models for the location. 相似文献
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Koray Ulgen 《Energy Sources, Part A: Recovery, Utilization, and Environmental Effects》2013,35(13):1171-1180
A solar collector is required to absorb solar radiation and transfer the absorbed energy into a heat transfer fluid with a minimum of heat loss. In assessing the performance of a collector, it is therefore important not only to determine its ability to absorb solar radiation but also to characterize its heat losses. The ability of a collector to absorb solar radiation is largely determined by its optical and geometric properties. One of the important parameters that affect the performance of a solar collector is its tilt angle with the horizontal. This is due to the fact that the variation in tilt angle affects the amount of solar radiation reaching the collector surface. In this study, a mathematical model is used to estimate the total (global) solar radiation on a tilted surface and to determine the optimum tilt angle for a solar collector in Izmir, Turkey. Total solar radiation on the solar collector surface with an optimum tilt angle is computed for specific periods. It is found that the optimum tilt angle changes between 0° (June) and 61° (December) throughout the year. In winter (December, January, and February) the tilt should be 55.7°, in spring (March, April, and May) 18.3°, in summer (June, July, and August) 4.3°, and in autumn (September, October, and November) 43°. The yearly average of this value was found to be 30.3° and this would be the optimum fixed tilt throughout the year. 相似文献
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We consider a general model for sizing a stand-alone photovoltaic system, using as energy input data the information available in any radiation atlas. The parameters of the model are estimated by multivariate linear regression. The results obtained from a numerical sizing method were used as initial input data to fit the model. The expression proposed allows us to determine the photovoltaic array size, with a coefficient of determination ranging from 0.94 to 0.98. System parameters and mean monthly values for daily global radiation on the solar modules surface are taken as independent variables in the model. It is also shown that the proposed model can be used with the same accuracy for other locations not considered in the estimation of the model. 相似文献
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This paper assesses the potential of harnessing solar radiation in different regions of Iran. In this regard, solar radiation maps are generated for five different cases: total radiation on a south facing fixed surface tilted at the latitude angle; total radiation on a surface tilted at the latitude angle with East–West tracking; total radiation on a surface tilted at the latitude angle with azimuth tracking; direct beam radiation on a horizontal surface with East–West tracking; and direct beam radiation on a surface with two axis tracking. The first three cases are generally applicable to photovoltaic (PV) power plants while the last two are generally used for concentrating solar power (CSP) plant design. In the second part of the paper, a 5 MW PV power plant is considered for 50 cities of Iran. Capacity factors, electricity generated and annual greenhouse gases emission reductions are compared. The results show a great potential for central and southern parts of the country. 相似文献