Wang Shucheng, Fu Zhongguang, Sajid Sajid, Zhang Tianqing, Zhang Gaoqiang
Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University, Beijing 102206, China.
School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China.
Entropy (Basel). 2018 Apr 25;20(5):313. doi: 10.3390/e20050313.
Integrating solar thermal energy into the conventional Combined Cycle Power Plant (CCPP) has been proved to be an efficient way to use solar energy and improve the generation efficiency of CCPP. In this paper, the energy, exergy, and economic (3E) methods were applied to the models of the Integrated Solar Combined Cycle System (ISCCS). The performances of the proposed system were not only assessed by energy and exergy efficiency, as well as exergy destruction, but also through varied thermodynamic parameters such as and . Besides, to better understand the real potentials for improving the components, exergy destruction was split into endogenous/exogenous and avoidable/unavoidable parts. Results indicate that the combustion chamber of the gas turbine has the largest endogenous and unavoidable exergy destruction values of 202.23 MW and 197.63 MW, and the values of the parabolic trough solar collector are 51.77 MW and 50.01 MW. For the overall power plant, the exogenous and avoidable exergy destruction rates resulted in 17.61% and 17.78%, respectively. In addition, the proposed system can save a fuel cost of 1.86 $/MW·h per year accompanied by reducing CO emissions of about 88.40 kg/MW·h, further highlighting the great potential of ISCCS.
将太阳能热能集成到传统的联合循环发电厂（CCPP）已被证明是利用太阳能和提高CCPP发电效率的有效途径。本文将能量、㶲和经济（3E）方法应用于集成太阳能联合循环系统（ISCCS）的模型。所提出系统的性能不仅通过能量效率和㶲效率以及㶲损失来评估，还通过诸如 和 等各种热力学参数来评估。此外，为了更好地了解改进组件的实际潜力，将㶲损失分为内源性/外源性和可避免/不可避免部分。结果表明，燃气轮机的燃烧室具有最大的内源性和不可避免的㶲损失值，分别为202.23 MW和197.63 MW，抛物槽式太阳能集热器的该值分别为51.77 MW和50.01 MW。对于整个发电厂，外源性和可避免的㶲损失率分别为17.61%和17.78%。此外，所提出的系统每年可节省1.86美元/兆瓦时的燃料成本，同时减少约88.40千克/兆瓦时的CO排放，进一步突出了ISCCS的巨大潜力。
