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Liquid metal technology for concentrated solar power systems: Contributions by the German research program

Karlsruhe Institute of Technology, Kaiserstr. 12, 76131 Karlsruhe, Germany

Special Issues: Studies on high temperature heat transfer fluid for concentrated solar thermal power systems

Concentrated solar power (CSP) systems can play a major role as a renewable energy source with the inherent possibility of including a thermal energy storage subsystem for improving the plant dispatchability. Next-generation CSP systems have to provide an increased overall efficiency at reduced specific costs and they will require higher operating temperatures and larger heat flux densities. In that context, liquid metals are proposed as advanced high temperature heat transfer fluids, particularly for central receiver systems. Their main advantages are chemical stability at temperatures up to 900 ℃ and even beyond, as well as largely improved heat transfer when compared to conventional fluids like oil or salt mixtures, primarily due to their superior thermal conductivity. However, major issues here are the corrosion protection of structural materials and the development of technology components and control systems, as well as the development of indirect storage solutions, to circumvent the relatively small heat capacity of liquid metals. On the other hand, using liquid metals might enable alternative technologies like direct thermal-electric conversion or use of solar high-tem­perature heat in chemical processes. This article aims at describing research areas and research needs to be addressed for fully evaluating and subsequently utilizing the potential of liquid metals in CSP systems. A second aim of the article is a brief overview of the liquid metal research capabilities of Karlsruhe Institute of Technology (KIT), their background and their relation to CSP and the aforementioned research pathways.
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1. Singer C, Buck R, Pitz-Paal R, et al. (2010) Assessment of Solar Power Tower Driven Ultrasupercritical Steam Cycles Applying Tubular Central Receivers with Varied Heat Transfer Media. J Sol Energy Eng 132: 041010.    

2. Hering W, Stieglitz R, Wetzel T. (2012) Application of liquid metals for solar energy systems. EPJ Web of Conferences 33: 03003.    

3. Bienert W B (1980) The heat pipe and its application to solar receivers Electric Power Systems Research. 3: 111-123.

4. Moreno J, Rawlinson S, Andraka C, et al. (2004) Dish/stirling hybrid-heat-pipe-receiver design and test results. IEEE. pp. 556-564.

5. Diver R, Fish J, Levitan R, et al. (1992) Solar test of an integrated sodium reflux heat pipe receiver/reactor for thermochemical energy transport. Sol energy 48: 21-30.    

6. Boerema N, Morrison G, Taylor R, et al. (2012) Liquid sodium versus Hitec as a heat transfer fluid in solar thermal central receiver systems. Sol Energy 86: 2293-2305.    

7. Kotzé JP, von Backström TW, Erens PJ. NaK as a primary heat transfer fluid in thermal solar power installations; 2012. Proceeding of SolarPaces.

8. Pacio J, Wetzel T (2013) Assessment of liquid metal technology status and research paths for their use as efficient heat transfer fluids in solar central receiver systems. Sol Energy 93: 11-22.    

9. Pacio J, Singer C, Wetzel T, et al. (2013) Thermodynamic evaluation of liquid metals as heat transfer fluids in concentrated solar power plants. Appl Therm Eng 60: 295-302.

10. Heinzel V, Huber F, Peppler W, et al. (1993) Ergebnisse des Kernforschungszentrums Karlsruhe. Sonnenenergie 2: 14-16.

11. Del Giacco M, Weisenburger A, Mueller G (2012) Fretting corrosion in liquid lead of structural steels for lead-cooled nuclear systems: Preliminary study of the influence of temperature and time. J Nucl Mater 423: 79-86.    

12. Schroer C, Wedemeyer O, Skrypnik A, et al. (2012) Corrosion kinetics of steel T91 in flowing oxygen-containing lead-bismuth eutectic at 450 ℃. J Nucl Mater 431: 105-112.    

13. Weisenburger A, Müller G, Heinzel A, et al. (2011) Corrosion, Al containing corrosion barriers and mechanical properties of steels foreseen as structural materials in liquid lead alloy cooled nuclear systems. Nucl Eng Des 241: 1329-1334.    

14. Weisenburger A, Schroer C, Jianu A, et al. (2011) Long term corrosion on T91 and AISI1 316L steel in flowing lead alloy and corrosion protection barrier development: Experiments and models. J Nucl Mater 415: 260-269.    

15. Engelko V, Mueller G, Rusanov A, et al. (2011) Surface modification/alloying using intense pulsed electron beam as a tool for improving the corrosion resistance of steels exposed to heavy liquid metals. J Nucl Mater 415: 270-275.    

16. Litfin K, Batta A, Class A, et al. (2011) Investigation on heavy liquid metal cooling of ADS fuel pin assemblies. J Nucl Mater 415: 425-432.    

17. Marocco L, Loges A, Wetzel T, et al. (2012) Experimental investigation of the turbulent heavy liquid metal heat transfer in the thermal entry region of a vertical annulus with constant heat flux on the inner surface. Int J Heat Mass Tran 55: 6435-6445.    

Copyright Info: © 2014, Thomas Wetzel, et al., licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution Licese (http://creativecommons.org/licenses/by/4.0)

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