From the perspective of the use of solar energy, the article analyzed principles of solar heating system and calculation method of the best solar fraction.

本文从太阳能利用的角度出发，分析了太阳能采暖系统的原理以及最佳太阳能保证率的计算方法。

youdao

The results indicated that collector efficiency and solar fraction of SDWH system could be significantly increased with the temperature stratification in storage tank.

计算数据表明，相比于完全混合的蓄热水箱，水箱温度分层可较大幅度提高太阳能集热器平均效率和太阳能保证率。

youdao

A detailed analysis has been made on how to determine the collector area. By analysis of the system's economic, we can get the best solar collector area and the best solar fraction.

详细阐述了如何确定太阳能采暖系统集热器面积，通过建立太阳能保证率和集热面积之间的关系模型，根据系统经济性确定系统的最佳集热面积及最佳太阳能保证率。

youdao

Even under optimistic projections, heavily subsidized wind and solar would each amount to a tiny fraction of global energy by 2030 and thus cannot be the main answer to energy-security or environmental problems.

WSJ: Michael Boskin: Washington's Knack for Picking Losers

People in a much larger region of the world can anticipate seeing a partial solar eclipse, in which the moon blocks only a fraction of the sun's disk.

CNN: Africa awaits total eclipse of the sun

Theoretically, Filler said, if some fraction of the LED were projected backwards into the system, embedded solar cells could capture some of that light as well.

FORBES: Magazine Article