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太阳辐射逐时模型的建立 总被引:13,自引:4,他引:13
讨论了性确定性与模型与随机模型联合使用方法,建立了太阳总辐射ARIMA逐时模型,该模型可用于模拟逐时太阳辐射,提供建筑能耗分析用的逐时太阳辐射参数,还可用于预报,控制等。 相似文献
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Widely used correlations, for estimating both the monthly average global and diffuse radiations incident on a horizontal surface, have been statistically compared to recommend ones that best fit the measured radiation data in Jordan The recommended correlations were further modified, by estimating the various coefficients of these correlations based on Jordanian data, to increase their accuracy in predicting both the global and diffuse radiation in Jordan. Finally a good agreement was obtained between the measured radiation data and the predicted data using the modified correlations. 相似文献
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The present article deals with evaluating the relative performance of the correlations to predict symmetric and asymmetric monthly average hourly values of global solar radiation from corresponding daily values. It has been found that the symmetric correlation due to CoUares-Pereira and Rabl [7] and asymmetric form due to Satyamurty and Lahiri [9] perform satisfactorily over a wide range of locations tested. 相似文献
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Precipitable water by reflecting the total water vapour amount in zenith direction between the surface of the earth and the top of the atmosphere is considered an important parameter for soiar radiation models. However, lack of ground data and/or radiosoundings in the examined area results in the inability to calculate precipitable water with further implications in the results of solar radiation models. The aim of this study is the estimation of the probability distribution function of the annual mean of precipitable water for Southern Greece. For the purposes of the study, radiosoundings of the National Meteorological Agency at Hellinicon station were used to obtain the daily values of water vapour for the period 1974-1995. Results were compared to measurements to show satisfactory agreement, a fact which allows their use for solar energy studies – as well as for energy budget calculations – in Southern Greece where in situ measurements are missing. 相似文献
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基于DEM的坡地太阳总辐射估算 总被引:4,自引:0,他引:4
借鉴国内外计算坡地太阳辐射的方法,利用数字高程模型(DEM)生成了计算山地太阳辐射的地形因子(坡度、坡向、遮蔽度、各向同性可见因子),比现有的模型更准确地计算了晴空下山地太阳总辐射、直接辐射、散射辐射和周围地形的反射辐射,在此基础上分析了坡度、坡向对太阳辐射的影响。 相似文献
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福建省太阳总辐射和地面辐射平衡的分布 总被引:5,自引:0,他引:5
首先利用福州市的辐射观测资料,建立计算太阳总辐射的经验公式,并计算福建省各市、县的太阳总辐射的年、月平均辐照度。然后利用地区代表站的地面反射率,求得福建省各月、年地面所吸收的太阳辐射能的分布。再利用地面温度、气温、水汽压和总云量,计算得出福建省各地的地面有效辐射的月、年平均辐照度。最后得出福建省各月、年地面辐射平衡的分布。 相似文献
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Data presented here for continuous measurements of global (285-2800?nm) and ultraviolet solar radiation (295-385?nm) are on horizontal level, which have been carried out for three years in Kuwait from January 96 to December 98. The ratio of monthly daily ultraviolet to global solar radiation was found to lie between 4.07% and 5.4%. The highest and lowest intensity monthly-daily recorded values for global radiation were 9.29 and 0.45?Kwh/m2 but for ultraviolet 445 and 31?Wh/m2 respectively. Dependence of the global and ultraviolet solar radiation on the atmospheric humidity was investigated. Linear regression functions were obtained with coefficient of determination R2> 0.7. The decrease in ultraviolet solar radiation from 270 to 240?Wh/m2 justifiably as a result of increasing the chemical pollutants SO2 and NO2. 相似文献
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基于数字高程模型的漳浦样区太阳天文日辐射模拟 总被引:4,自引:0,他引:4
以地形特征、经纬度位置等作为影响太阳辐射空间分布差异的变量,以漳浦样区为研究区域,在地理信息系统支持下建立样区DEM和太阳天文日辐射值计算模型,探求小区域尺度上地形对太阳天文日辐射空间分布的影响。结果表明:地形对漳浦样区太阳天文日辐射空间分布的影响相当显著,基本上是山谷小、山脊大、阴坡小、阳坡大,高辐射量值主要出现在阳坡。该方法可以快速地获取较为精确的小区域太阳天文日辐射空间分布值,但由于该模型没有考虑云的影响和DEM精度,计算值与实际太阳辐射存在一定偏差,今后研究的方向是以遥感影像为数据源考虑地面状况和云的影响,以期提高模拟精度。 相似文献
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福州城市发展对太阳辐射的影响 总被引:8,自引:2,他引:8
利用福州市日射站1960年至1994年的观测资料,分析了福州城市发展对太阳直接辐射,散射辐射和总辐射的影响,建立了福州市太阳直接辐射和散射辐的10年滑动平均值的年,月趋势方程和年总辐射及其分量与市区人口的相关方程。 相似文献
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太阳逐时总辐射混沌优化神经网络预测模型研究 总被引:7,自引:0,他引:7
根据影响太阳逐时总辐射的气象、地理等方面因素的分析以及对太阳逐时总辐射历史数据的相关性分析,确定了建立太阳逐时总辐射的神经网络预测模型输入因素项。根据全年最大可照时数统一了太阳逐时总辐射各天的历史数据,并对宝山气象站的太阳逐时总辐射建立了混沌优化神经网络预测模型(CONN),编制了计算机程序。模型输出反映了太阳逐时总辐射的变化规律,预测结果也足够准确。 相似文献
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中国大陆散射日射与总日射和地外日射的关系 总被引:2,自引:0,他引:2
利用1992年我国大陆10个日射站点的逐时和逐日的散射日射、总日射辐照量记录,在小时散射成分与小时晴朗因子KT以及日散射成分与日晴朗因子KT之间建立了相关相系,对其误差进行分析,并与国外同类工作的结果作比较,表明这类关系是有地区差异的,还与大气浑浊情况有关。所得关系可供利用逐时或逐日的总日射辐照量推算相应时段的散射辐照量。 相似文献
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