基于聚光太阳能热发电的联合循环发电系统.docx

基于聚光太阳能热发电的联合循环发电系统摘要：针对我国西北沙漠地区太阳能资源丰富但缺水严重的问题提出了一种间冷回热太阳能燃气轮机与卡林那相结合的联合循环发电系统。通过“比较法”推导出太阳能热发电效率简明解析式。基于能的品位概念采用EUD图像分析方法探讨了新循环各个子过程的不可逆损失指出了不可逆损失分布特征和太阳能热发电效率提高的潜力。通过分析关键参数对热力性能的影响揭示了这种太阳能联合循环的热力特性规律。另外针对传统太阳能热发电系统在低辐照时不发电的现状提出了一种由太阳能燃气轮机循环、朗肯循环、卡林那循环组成的联合循环发电系统并提出了一种新的运行调变策略根据太阳辐照强度的变化切换系统流程从而实现低辐照发电。以新疆地区的气象条件为例研究了系统四季典型日的变辐照运行性能。关键词：太阳能热发电热力循环卡琳娜循环Abstract：InordertoconservewaterforsolarthermalpowerplantsinaridareaanewsolartowerthermalpowersystemintegratingtheintercooledgasturbinetopcycleandtheKalinabottomingcycleisproposed.Thethermodynamicperformanceoftheproposedsystemisinvestigatedandtheirreversibilityofenergyconversionisdisclosedusingtheenergy-utilizationdiagrammethod.Aconciseanalyticalformulaofsolar-to-electricefficiencyoftheproposedsystemisdeveloped.Asaresultthepeaksolar-to-electricefficiencyoftheproposedsystemis27.5%atagasturbineinlettemperatureof1000°Cunderthedesignedsolardirectnormalirradianceof800W/m2.Comparedwithaconventionalsolarpowertowerplanttheproposedintegratedsystemconservesapproximately69%ofconsumedwater.Ontheotherhandanewsolar-driventriplecycleisproposedtoallowpowergenerationduringlowinsolationperiods.Anewoperationalstrategywaspresentedtogenerateelectricityduringlowisolationperiodwithoutthebackupoffossilfuel.Theoff-designperformancewasinvestigatedandtheirreversibilitywasdisclosedwiththeaidoftheenergy-utilizationdiagrammethod.Thustheproposedsystemcanutilizelowisolationtogenerateelectricity.KeyWords：Concentratingsolarpower；Powercycle；Kalinacycle阅读全文链接（需实名注册）：http：///xiangxiBG.aspx？id=50548&flag=1