该文以八达岭1 MW塔式太阳能热发电系统为研究对象,建立了以水/水蒸汽为工质、带储能系统的塔式太阳能热发电■分析模型,并利用已有仿真平台模拟了电站在变工况下的状态参数。在此基础上,对整个电站进行了设计工况及变工况条件下■分析...该文以八达岭1 MW塔式太阳能热发电系统为研究对象,建立了以水/水蒸汽为工质、带储能系统的塔式太阳能热发电■分析模型,并利用已有仿真平台模拟了电站在变工况下的状态参数。在此基础上,对整个电站进行了设计工况及变工况条件下■分析,辨识了各子系统热效率和■效率的变化规律。结果表明,设计工况下吸热器的损失率最高,可通过提高吸热器出口蒸汽温度来提高其效率。非设计工况下,定日镜场的效率受其与太阳相对位置的影响,其它子系统效率随太阳直射辐射强度(direct normal insolation,DNI)的增大而增大;充热过程中,随着进入储能系统蒸汽量的减少,储能系统和电站效率越来越高;放热过程中,储能系统释放的蒸汽流量对储能系统和电站的效率有显著的影响。展开更多
Different operating conditions （e.g. design and off-design） may lead to a significant difference in the hydrodynamics performance of a ship, especially in the total resistance and wake field of ships. This work inve...Different operating conditions （e.g. design and off-design） may lead to a significant difference in the hydrodynamics performance of a ship, especially in the total resistance and wake field of ships. This work investigated the hydrodynamic performance of the well-known KRISO 3600 TEU Container Ship （KCS） under three different operating conditions by means of Particle Image Velocimetry （P/V） and Computational Fluid Dynamics （CFD）. The comparison results show that the use of PIV to measure a ship＇s nominal wake field is an important method which has the advantages of being contactless and highly accurate. Acceptable agreements between the results obtained by the two different methods are achieved. Results indicate that the total resistances of the KCS model under two off-design conditions are 23.88% and 13.92% larger than that under the designed condition, respectively.展开更多
文摘该文以八达岭1 MW塔式太阳能热发电系统为研究对象,建立了以水/水蒸汽为工质、带储能系统的塔式太阳能热发电■分析模型,并利用已有仿真平台模拟了电站在变工况下的状态参数。在此基础上,对整个电站进行了设计工况及变工况条件下■分析,辨识了各子系统热效率和■效率的变化规律。结果表明,设计工况下吸热器的损失率最高,可通过提高吸热器出口蒸汽温度来提高其效率。非设计工况下,定日镜场的效率受其与太阳相对位置的影响,其它子系统效率随太阳直射辐射强度(direct normal insolation,DNI)的增大而增大;充热过程中,随着进入储能系统蒸汽量的减少,储能系统和电站效率越来越高;放热过程中,储能系统释放的蒸汽流量对储能系统和电站的效率有显著的影响。
基金supported by the National Natural Science Foundation of China(Grant Nos.41176074,51209048,51379043,and 51409063)the High Technology Ship Scientific Research Project of Ministry of Industry and Information Technology of China(Grant No.G014613002)
文摘Different operating conditions （e.g. design and off-design） may lead to a significant difference in the hydrodynamics performance of a ship, especially in the total resistance and wake field of ships. This work investigated the hydrodynamic performance of the well-known KRISO 3600 TEU Container Ship （KCS） under three different operating conditions by means of Particle Image Velocimetry （P/V） and Computational Fluid Dynamics （CFD）. The comparison results show that the use of PIV to measure a ship＇s nominal wake field is an important method which has the advantages of being contactless and highly accurate. Acceptable agreements between the results obtained by the two different methods are achieved. Results indicate that the total resistances of the KCS model under two off-design conditions are 23.88% and 13.92% larger than that under the designed condition, respectively.
