Hourly, long term and precipitation map from NRK and Meteorologisk institutt.

2013年7月4日 · Yr is numerically equal to the incident energy in the plane of array [POA], expressed in [kWh/m²] (see below). - Ya [kWh/kWp] = Array Yield is the array daily output energy, referred to the nominal power [kWh / KWp]. - Yf [kWh/kWp] = System Yield is the system daily useful energy, referred to the nominal power [kWh / KWp / day].

PR = Performance Ratio = Yf / Yr, is the global system efficiency with respect to the nominal installed power and the incident energy. For stand-alone systems (or every system with limited load), we also introduce:

Yf: [kWh/kW] final system yield (AC per rated DC) Yr: [kWh/kW] reference yield (DC) Yield losses are calculated by subtracting yields. The yield losses also have units of [kWh/kW]. They represent the amount of time the array would be required to operate at its rated power P0 to provide for the respective losses during the reporting period.

- PR = Performance Ratio = Yf / Yr, is the global system efficiency with respect to the nominal installed power and the incident energy. For stand-alone systems (or every system with limited load), we also introduce:

2023年1月5日 · 计算公式：PR=Yf/Yr(Eout/P0)/(Hi/Gi,ref) 光伏PR值，全称为光伏系统效率（Performance Ratio），是一个光伏系统评价质量的关键指标，是电站实际输出功率与理论输出功率的比值，反映整个电站扣除所有损耗后（包括辐照损失、线损、器件损耗、灰尘损耗、热损耗 …

= Yf / Yr = E_Grid / (GlobInc * PNomArray) NB: The Normalized Reference nominal energy at STC Yr [kWh el /kWp] is the electrical energy which would be produced by the Reference incident energy on the collector plane under STC conditions (1 kW irrad /m2, 25°C).

2019年4月11日 · 在IEC61724标准中，衡量一座光伏电站发电能力的核心推荐指标，主要包括Yr、Yf和PR值，三者定义及逻辑关系如下表： IEC61724中关于光伏发电性能评价指标参数的定义

2016年9月23日 · 如果分高低区通常用首字母表示即高区-G，低区-D。 排水管道-W,表示污水。 也有-F，就是废水。 很少见有用-P表示的。 消火栓管道-XH。 自动喷淋管道-Z或者-ZP. 采暖管道-R，一般实线表示供水管，虚线表示 回水管。 压力排水-PY. 冷凝水管道-N。 Q-流量或者风量。 H-扬程。 N-功率。 P-压力。 QW-潜污泵。 其他阀门、器具之类的都是用图形区分。 有设计图例吗？ 工程给排水图中 Y YL YY YYL W WL C CL P PL JL H代表的什么啊排水的图纸中，缩写符号 …