Overview of GINIX and Top-k Method

In today’s life more applications are web based and peoples may communicate with each other by using Internet. It involves more and more data retrieval from database system as per user demand. Inverted Index is a system use for searching in which searching is takes place as per index sequentially. So it require more time for searching. While Ginix can search as per word in which all files or related document that word is search appropriately. But it only search documents file which are save in database system but not search multimedia files. Hence the more competent technique for searching is top-k method in which all database is scan for finding appropriate result for given data. Also data is search on web pages. It provides more perfect result within less time as compare to Ginix. DOI: 10.17762/ijritcc2321-8169.15011

HIGH-TEMPERATURE RECEIVER DESIGNS FOR SUPERCRITICAL CO 2 CLOSED-LOOP BRAYTON CYCLES

ABSTRACT High-temperature receiver designs for solar powered supercritical CO 2 Brayton cycles that can produce ~1 MW of electricity are being investigated. Advantages of a supercritical CO 2 closed-loop Brayton cycle with recuperation include high efficiency (~50%) and a small footprint relative to equivalent systems employing steam Rankine power cycles. Heating for the supercritical CO 2 system occurs in a high-temperature solar receiver that can produce temperatures of at least 700 °C. Depending on whether the CO 2 is heated directly or indirectly, the receiver may need to withstand pressures up to 20 MPa (200 bar). This paper reviews several high-temperature receiver designs that have been investigated as part of the SERIIUS program. Designs for direct heating of CO 2 include volumetric receivers and tubular receivers, while designs for indirect heating include volumetric air receivers, molten-salt and liquid-metal tubular receivers, and falling particle receivers. Indirect receiver designs also allow storage of thermal energy for dispatchable electricity generation. Advantages and disadvantages of alternative designs are presented. Current results show that the most viable options include tubular receiver designs for direct and indirect heating of CO 2 and falling particle receiver designs for indirect heating and storage