ANALYSIS OF SEVERAL SOLAR THERMAL ELECTRICAL CYCLES BOOSTED BY ABSORPTION WORKING TECHNOLOGY AND OPERATED IN A DESERT CLIMATE

摘要

Desert area are important for future solar clean power production. Paper analyses three thermal electricalplants, based on Clausius-Rankine absorption working cycle and operated by ammonia-water, i.e.WORKCRAFT, WORKCRAFT-ORC and WORKCRAFT-SRC. Plants operate day-night time. Three solarcollectors, providing heat and sink sources supply and latent storage for operation, are considered, i.e. theparabolic trough concentrating (PTC), a new high temperature PTC, (HTPTC), and the unglazed flat-plate(UFP) solar collector. As input data, plants sink and heat temperatures are ğ‘‡_(ğ‘€ğ‘) = 4,0℃ and ğ‘‡_(ğºğ‘‚) =304℃; 450℃; 550℃, respectively. Solar irradiance is ğ»_(ğ‘”ğ‘™ğ‘œğ‘ğ‘ğ‘™) = 800 ğ‘Šğ‘š~(−2) and ğ»_(ğ‘‘ğ‘–ğ‘Ÿğ‘’ğ‘ğ‘¡) = 672 ğ‘Šğ‘š~(−2).Solar collecting and electrical efficiency are ğœ‚_(ğ‘ğ‘œğ‘™ğ‘™),ğ‘ƒ_(ğ‘‡ğ¶) =0,6451; 0,5056; 0,2346, ğœ‚_(ğ‘ğ‘œğ‘™ğ‘™),ğ»_(ğ‘‡ğ‘ƒğ‘‡ğ¶) =0,6736; 0,6044;0,4731 and ğœ‚_(ğ‘’ğ‘™ğ‘’ğ‘ğ‘¡ğ‘Ÿğ‘–ğ‘ğ‘ğ‘™) = 0,3275; 0,36; 0,45, respectively. Analysis has chosen solar WORKCRAFT forpromotion in clean power yield, because is effective, (ğœ‚_(ğ‘’ğ‘™) ∗ ğœ‚_(ğ‘ğ‘œğ‘™ğ‘™))ğ‘‘ğ‘ğ‘¦,ğ‘›ğ‘–ğ‘”â„ğ‘¡ ğ‘Šğ‘‚ğ‘…ğ¾ğ¶ğ‘…ğ´ğ¹ğ‘‡ = 0,223 ğ‘˜ğ‘Š_(ğ‘’ğ‘™) ∗ ğ‘˜ğ‘Š_(ğ‘ ğ‘œğ‘™ğ‘ğ‘Ÿ)~(-1) , and least complex. Efficiency of solar WORKCRAFT is compared with challenging conventional photovoltaics (PV) and concentrating photovoltaics (CPV) technology in hot dry areas.