15kW等级闭式海洋温差KSC-11发电系统的性能分析

STUDY ON THE PERFORMANCE OF THE 15kW OTEC SYSTEM WITH KSC-11 CYCLE

对15kW等级混合工质海洋温差卡林纳-11循环(简称KSC-11)系统进行计算和分析。结果表明,对于给定的透平进口压力,KSC-11系统存在相对应的最佳氨质量分数。对于给定氨质量分数的KSC-11系统,也存在相对应的最佳透平进口压力。在可利用海水温差19℃条件下,15kW等级KSC-11系统中,氨质量分数对最大净功影响不大,对应最佳透平进口压力为0.60～0.75MPa;氨质量分数为0.95的KSC-11系统综合性能最好,单位净功产量的换热器总面积γ为6～7m2/kW,对应的最佳透平进口压力为0.75MPa。

The study on the performance of the Kalina cycle system 11 （KSC-11 for short） used in ocean thermal energy conversion（ OTEC）was studied. The results showed that an optical mass fraction of ammonia exists for the system with a fixed turbine inlet pressure condition. And the optical turbine inlet pressure is also found to exist when the mass fraction of ammonia is a constant value. According to the results, the effect of mass fraction of ammonia on the maximal net power is little when the sea water temperature difference is about 19℃. And it is found that the corresponding optimal turbine inlet pressure is O. 60-0.75MPa, the system will achieve the best operation performance when the mass fraction of ammonia is 95%. and the ratio of total heat exchanger area to net power y Correspondingly, the turbine inlet pressure is 0.75MPa is 6-Tm2/kW.