In the early twentieth century, electrical grids relied almost exclusively on thermal power plants fueled by coal or oil. Because these plants required several hours to adjust their power output to accommodate fluctuating demand, utility managers faced severe operational inefficiencies during peak hours. To address this mismatch, engineers developed pumped-storage hydroelectricity. In this system, surplus electricity generated during periods of low demand is used to pump water from a lower reservoir to an upper reservoir. When electricity demand spikes, the stored water is released back down through turbines to generate additional power almost instantaneously.
Although pumped-storage facilities require significant capital investment and specific geographical conditions, they provided early power networks with unprecedented flexibility. By smoothing out the disparity between baseload supply and consumer demand, pumped-storage systems allowed thermal power plants to operate continuously at optimal efficiency, significantly reducing overall operational costs. Consequently, the technology laid the groundwork for modern energy storage strategies.
The author mentions that thermal power plants "required several hours to adjust their power output" primarily in order to achieve which of the following functions in the passage?
- Identify the operational limitation of thermal plants that prompted the creation of pumped-storage hydroelectricity.Cevap
- BSummarize the technical procedure used to pump water from lower to upper reservoirs.
- CCriticize early utility managers for failing to adopt energy storage methods sooner.
- DDemonstrate that thermal power plants became entirely useless once hydroelectric systems were introduced.
- EConcede that pumped-storage facilities were financially impractical for early electrical networks.