期刊
SOLAR ENERGY
卷 96, 期 -, 页码 194-204出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.solener.2013.06.033
关键词
Solar energy; Energy storage; Thermocline; Concrete; Molten salt
资金
- U.S Department of Energy (DOE) [DE-FG36-08GO18147]
Rising energy costs and the adverse effect on the environment caused by the burning of fossil fuels have triggered extensive research into alternative sources of energy. Harnessing the abundance of solar energy has been one of the most attractive energy alternatives. However, the development of an efficient and economical solar energy storage system is of major concern. According to the Department of Energy (DOE), the cost per kilowatt hour electric from current technologies which utilize solar energy is high, estimated at approximately $0.15-$0.20/kW h(electric), while the unit cost to store the thermal energy is approximately $30.00/kW h(thermal). Based on traditional means of producing electricity (through burning fossil fuels), the unit cost of electricity is $0.05-$0.06/kW h. Clearly, current solar energy technologies cannot compete with traditional forms of electricity generation. In response, the DOE has established a goal of reducing the cost of solar generated electricity to $0.05-$0.07/kW h(electric) and achieving thermal storage costs below $15.00/kW h(thermal). Reduction in the cost of the storage medium is one step in achieving the stated goal. In this research program economical concrete mixtures were developed that resisted temperatures up to 600 degrees C. This temperature level represents a 50% increase over the operating temperature of current systems, which is approximately 400 degrees C. However, long-term testing of concrete is required to validate its use. At this temperature, the unit cost of energy stored in concrete (the thermal energy storage medium) is estimated at $0.88-$1.00/kW h(thermal). These concrete mixtures, used as a thermal energy storage medium, can potentially change solar electric power output allowing production through periods of low to no insolation at lower unit costs. (C) 2013 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据