PGN50/2V
发布时间:2019-01-11 16:03:29点击率:
PGN50/2V
PGN50/2V
PGN50/2V
PGN50/2V
首年的发电量=装机容量X辐照量 X系统效率 《联系人;欧先生》 HA:当地平均日射量(kwh/㎡/day)
以日射量来估算发电量。
a、光伏阵列效率η1:
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光伏阵列在1000W/m2太阳能辐射强度下,实际的直流输出功率与标称功率之比。
光伏阵列在能量转换与传输过程中的损失包括:①组件匹配损失:对于精心设计、精心施工的系统,约有4%的损失;
②太阳辐射损失:包括组件表面尘埃遮挡及不可利用的低、弱太阳辐射损失,取值5%;
③偏离 大功率点损失:如温度的影响、 大功率点跟踪(MPPT)精度等。取值2-4%;
④直流线路损失:按有关规定,应小于1-3%。
取:η1=96%×95%×98%×98%=87.6%
b、逆变器的转换效率η2:
一般并网逆变器效率在94%以上,取94%;逆变器输出的交流电功率与直流输入功率之比。
C、交流并网效率η3:
若不经过高压电网的传输,效率可取η3=1
系统总效率η=η1×η2×η3=87.6%×94%×1=82.3%
系统 年发电量(EP)=PAS×HA×η×365
PAS:太阳光伏阵列容量
η: 系统总效率
本项目光伏电站组件在水泥屋面正南25度安装,按光伏板使用25年计算,考虑到光伏电池板及相关部件的损耗,剩下24年按照每年0.8%递减计算。本工程年平均发电量为6.33万度,25年总发电量约158.28万度。
5.2.3 项目产生经济效益和系统环境效益
根据上述发电量情况,结合公司的工业用电价格及国家补贴等,本项目在25年的使用周期内,具有可观的经济效益,具体为:项目总投资约8元/W,总投资金额约53万元。按光伏发电的90%自用,10%上网。每年的年总收入为8.61万元。年投资收益率为16.24%。
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