471-2004-1-Concentrating collector-Serkan Kapucu

The receiver collects the suns heat in a heattower

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: d on top of tall tower. The receiver collects the sun's heat in a heattower. transfer fluid (molten salt) that flows through the transfer receiver. The salt's heat energy is then used to make steam to generate electricity in a conventional steam generator, located at the foot of the tower. The molten salt storage system retains heat efficiently, so it can be stored for hours or even days before being used to generate electricity [5]. In this system, molten-salt is pumped from a “cold” tank at 288 deg.C and cycled through the receiver where it is heated to 565 deg.C and returned to a “hot” tank. The hot salt can then be used to generate electricity when needed. Current designs allow storage ranging from 3 to 13 hours [4]. Figure 4.3.1 shows the process of molten salt storage. Figure 4.3.1 The process of molten salt storage [11]. 5. Technology Comparison 5. Towers and troughs are best suited for large, gridTowers connected power projects in the 30-200 MW size, connected whereas, dish/engine systems are modular and can be used in single dish applications or grouped in dish farms to create larger multi-megawatt projects. Parabolic trough plants are the most mature solar power technology available today and the technology most likely to be used for near-term deployments. Power towers, with low cost and efficient thermal storage, promise to offer dispatchable, high capacity factor, solar-only power plants in the near future. The modular nature of dishes will allow them to be used in smaller, high-value applications. Towers and dishes offer the opportunity to achieve higher solar-to-electric efficiencies and lower cost than parabolic trough plants, but uncertainty remains as to whether these technologies can achieve the necessary capital cost reductions and availability improvements. Parabolic troughs are currently a proven technology primarily waiting for an opportunity to be developed. Power towers require the operability and maintainability of the molten-salt technology to be demonstrated and the deve...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online