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From VOA Learning English, this is the Technology Report.
The U.S. Department of Energy says that waves and tides along U.S. coasts create about 1,420 terawatt-hours of energy a year. That is equal to the amount of energy produced by more than 330 nuclear power factories. But today’s technologies can only capture about 20 percent of the energy from ocean waves. Jose Zayas is the director of the Wind and Water Power Technologies Office at the Department of Energy. He says 20 percent is too low for an investment in ocean wave energy to be economical. He says it needs to be 30 percent to 40 percent. The Department of Energy has launched the Wave Energy Prize competition to encourage development of new technologies. But developing new devices to capture wave energy can be difficult. Wave capture machines must operate in oceans. Competition organizers expect most of the new ideas to come from established energy companies as well as some universities and research centers. Mr. Zayas says testing the new technologies will be done in several steps using scaled models. The scaled models will be tested at the United States Navy’s large indoor testing pool near Washington. Machines at the pool can create ocean-size waves. The competition will not require the machines to produce electrical power. Mr. Zayas says the main goal of the Wave Energy Prize is to develop a new set of power producing technologies for the future. Developers of the best performing devices will receive prizes from $250,000 to as much as $1.5 million.