UNIT 6

{̓eƈv̂ɂ͂sCvȂ̂ɂ͂eƏȂB
1.To provide a large amount of power at times of peak usage, we have only to use gpumped-storage hydropower.hi@@j
2.Todayfs batteries can store and discharge a very large amount of energy, so we donft have to use old-fashioned PSH. i@@j
3.Instead of the old type of PSH which costs a lot, researchers and developers installed new types of PSH underground. i@@j
4.To improve the efficiency of CAES, some engineers are trying to develop a system of reusing the heat released during compression.i@@j
5.A system which uses argon gas works to supply electricity steadily and economically every day. i@@j