PDF Publication Title:
Text from PDF Page: 007
H. Zhang et al./Progress in Energy and Combustion Science 53 (2016) 1–40 7 Fig. 5. Classification of energy storage systems according to the working temperature [28]. HTF is considered as a novelty and offers major benefits to enhance the solar power tower commercial potential [7,21,28]. The use of particle suspensions as heat carrier to transfer solar heat from the receiver to the energy conversion process offers major advantages in comparison with water/steam, thermal fluids or molten salts. Since the particle suspension has a heat capacity similar to that of molten salts, without temperature limitation except for the maximum al- Fig.6. EvolutionofstandardreheatRankine-cycleconfigurations(numbersreferto Table 3) [28]. Table 3 Typical operating conditions reported by Spelling et al. [33]. Nbr. Power cycle 1 High-tech. PTC plants 2 High-tech. molten salt SPT plants 3 Old subcritical fossil fuel plants 4 High-tech. subcritical fossil fuel plants 5 Old supercritical fossil fuel plants 6 High-tech. supercritical fossil fuel plants 7 Advanced supercritical fossil fuel plants 8 Ultra-supercritical fossil fuel plants lowable wall temperature of the receiver tube, suspension temperatures of up to 800 °C can be tolerated for refractory steel tubes (even higher when using ceramic or glass tubes), thus offer- ing new opportunities for highly efficient thermodynamic cycles such as obtained when using supercritical steam or CO2. With higher tem- perature HTFs, a cascade of effects is noteworthy, with additional high efficiency thermodynamic systems being viable, as illus- trated in Fig. 6 and assessed by e.g. Dunham and Iverson [29]. A higher temperature operation will increase the power cycle effi- ciency, whilst increasing the temperature range over which the storage operates, thus enhancing the storage density. The in- creased efficiency of the power cycle also reduces the thermal power demand for a constant receiver efficiency, which allows more elec- tricity to be generated per unit of stored thermal energy. The increased capacity of the storage moreover increases the power plant capacity factor, thus reducing investments, despite the use of more expensive construction materials. If a new high-temperature HTF is to improve the economics of e.g. SPT applications, the cost re- duction of the solar field and storage must more than outweigh cost increases of the receiver and power block. A high temperature powder circulation loop allows advanced power cycle configura- tions to be used, albeit not yet exploited in current solar power tower applications. Such suspension receivers with outlet temperature above 700 °C are being developed in the Concentrated Solar Power in Particles European project (CSP2) [30]. Supercritical Rankine cycles and associated steam turbines are commonly designed for large power outputs (~800 MWel) [31], and will need to be scaled-down for smaller plants by a redesign in order to cope with the low volumetric flow rates and the resulting small Steam conditions °C Bar 375 100 535 115 535 165 565 165 565 255 600/610 270 600/620 285 700/720 350 Cycle efficiency (%) ~35 ~40 ~42 ~43 ~44 ~45 ~46 ~48PDF Image | Thermal energy storage: Recent developments
PDF Search Title:
Thermal energy storage: Recent developmentsOriginal File Name Searched:
3-Thermal-Energy-storage-recent-developments-and-practical-aspects.pdfDIY PDF Search: Google It | Yahoo | Bing
Turbine and System Plans CAD CAM: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. More Info
Waste Heat Power Technology: Organic Rankine Cycle uses waste heat to make electricity, shaft horsepower and cooling. More Info
All Turbine and System Products: Infinity Turbine ORD systems, turbine generator sets, build plans and more to use your waste heat from 30C to 100C. More Info
CO2 Phase Change Demonstrator: CO2 goes supercritical at 30 C. This is a experimental platform which you can use to demonstrate phase change with low heat. Includes integration area for small CO2 turbine, static generator, and more. This can also be used for a GTL Gas to Liquids experimental platform. More Info
Introducing the Infinity Turbine Products Infinity Turbine develops and builds systems for making power from waste heat. It also is working on innovative strategies for storing, making, and deploying energy. More Info
Need Strategy? Use our Consulting and analyst services Infinity Turbine LLC is pleased to announce its consulting and analyst services. We have worked in the renewable energy industry as a researcher, developing sales and markets, along with may inventions and innovations. More Info
Made in USA with Global Energy Millennial Web Engine These pages were made with the Global Energy Web PDF Engine using Filemaker (Claris) software.
Sand Battery Sand and Paraffin for TES Thermo Energy Storage More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)