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LUZ II’s proprietary, hybrid, solar-gas powered generating technology, Distributed Power Towers (DPT), is significantly more cost effective than any other solar thermal technology.
LUZ II’s project-ready, Generation One technology, (DPT 550), produces reliable, peak power electricity by using solar energy to create superheated steam.
LUZ II’s DPT technology consists of a number of solar clusters, each of which includes a power tower surrounded 3600 by an array of heliostats. Heliostats are flat, glass mirrors which track the sun and reflect sunlight onto a receiver, which is located on the top of a power tower. Power towers are linked together by pipelines to a central location where electricity is generated and sent to a power grid.
The DPT 550 technology heats water to superheated steam at a temperature of 5500 – 5650 C. A high efficiency steam turbine converts the superheated steam to electricity, which is sent to a power grid. The DPT 550 technology is more than 40% efficient in thermal to electric conversion. Both 100 MW and 200 MW power plants are currently being designed.
TECHNOLOGY COST COMPARISON:
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SEGS 6
(Original Luz parabolic trough design) |
Optimum Trough
(Improved parabolic trough design) |
DPT 550
(LUZ II superheated steam technology) |
| Temperature(C) |
370 C |
400 C |
550 C |
| Solar to Thermal Efficiency |
35% |
40% |
50% |
| Gross Thermal to Electricity Efficiency |
37% |
39% |
43% |
| Parasitic Power |
14% |
12% |
5% |
| Solar to Electrical Efficiency |
11% |
14% |
20% |
| Relative Cost Per kWhr |
100% |
90% |
70% |
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