For different installed capacity of solar thermal power generation projects, which technology is most suitable for different projects have been installed? This issue caused heated debate due to a report released by LuxResearch.
According to a research report released by the well-known research consultancy LuxResearch on the solar thermal power generation called TurningUptheHeatonAdvancedConcentratingSolarComponents, tower technology is the most suitable for the design of the installed capacity of solar thermal power plants with different technical routes. And Fresnel technologies are best suited for developing large and small projects, respectively.
LuxResearch even predicts that the LCOE for Air Breton Reactor and CSP Reactor will be 31% -33% lower than that for polysilicon PV by 2020, respectively.
LuxResearch said, "Fresnel CSP is the most suitable technology for small project development. The Fresnel technology using molten salt as the heat transfer fluid LCOE can be 6% lower than polycrystalline silicon photovoltaic, which has the greatest potential to dominate the small photothermal Power generation projects to develop the market and play an alternative role in the ISCC combined cycle power generation project, industrial heat utilization, auxiliary petroleum exploration, water treatment and other fields. "
JayeshGoyal, vice president of worldwide sales at Areva Solar, a leader in Fresnel's CSP technology, believes it is a mistake to assume that Fresnel technologies will not be able to compete in the development of large CSP projects.
Small project
JayeshGoyal said our goal is to develop a large Fresnel CSP plant with a capacity of 250MWe and a 17-hour heat storage system. "Fresnel technology is the right one for the development of small CSP projects because the Fresnel heat collection system is modular and cost-effective, but to say that it is not suitable for the development of large CSP projects, which We can not agree with that, "JayeshGoyal said.
Goyal also mentioned in the report that Fresnel technology will be able to contend with polysilicon PV in LCOE. He thinks unless the Fresnel is equipped with molten salt heat storage, The LCOE of both is possible.
"For the LCOE forecast, what I would like to say is that Fresnel CSP will undoubtedly outperform PV if it compares LCOE for adjustable power (both with energy storage systems), but for projects without energy storage In terms of any CSP technology, it takes a long time to overcome LCOE's PV generation. "Goyal said, adding:" I still do not see the future of CSP A clear road map. "
Proponents of Fresnel technology think the technology is cheaper than other CSP technologies because of its relatively slotted technology with lightweight, inexpensive mirrors that are relatively simpler than tower-based technology tracking control systems.
But KellyBeninga, Chief Commercial Officer at SkyFuel, a reflective-film trough heat collector, is keen to emphasize the best of today's most mature and widely used trough thermoelectric power generation technologies. He believes that trough technology is beneficial to all types of light and heat Power generation projects are a good choice.
As a developer of trough technology, SkyFuel trough technology is understandable. Beninga said that SkyFuel has also tried to develop the Fresnel system in the past. "By building a prototype Fresnel system, we demonstrated that the low optical efficiency of the Fresnel concentrator system can not offset the low cost advantage of its simple structure." SkyFuel believes it has proven this through practice.
operating efficiency
"The low optical efficiency of the Fresnel system requires that you have to build a sufficiently large light field, for which the added cost will be higher than the system cost savings due to its simple architecture." Beninga said, "SkyFuel's comparative study has shown It was not because we were developing trough technology, but because we were able to choose between the two systems early on, but after a comparative experiment, we chose trough technology. "
He also disagreed with the conclusion in the report that "tower technology will be more cost-effective than slot technology in the development of large-scale solar thermal power stations".
The widely accepted view is that tower technology will gradually outperform trough technology in the future because of its ability to achieve higher operating temperatures, higher temperatures that result in higher system efficiency and lower electricity costs. In the installed capacity of solar thermal power station project, tower technology is also more cost-effective.
But Beninga disagrees with this, arguing that it is scrupulous to conclude on such assumptions that, in particular, what tower proponents claim to have a higher operating temperature than the slot technology only means The comparison between a tower-type power station with molten salt as a medium and a slot-type power station with thermal oil as a medium.
This may be appropriate in many of the solar thermal plants now operating. However, trough technology is also gradually developed, many trough solar thermal power plant project developers are currently planning to develop molten salt as the working fluid of the new power plant, which can achieve more than 500 degrees Celsius operating temperature.
At the same time, he also pointed out that tower technology LCOE is currently not beyond the trough technology, tower technology supporters believe that as its technology matures, the cost will inevitably fall under trough technology is only a non-reality hypothetical .
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