Backpressure adjustable gas turbine combined cycle: A method to improve part-load efficiency
Backpressure adjustable gas turbine combined cycle: A method to improve part-load efficiency
复制标题
背压可调燃气轮机联合循环：提高部分负荷效率的方法
DOI：
10.1016/j.enconman.2018.07.077
复制
发表时间：
2018-08
影响因子：
10.4
通讯作者：
Yang Yongping
中科院分区：
文献类型：
--
作者：
Li Yongyi;Zhang Guoqiang;Bai Ziwei;Song Xiaowei;Wang Ligang;Yang Yongping
随着可再生能源比重的不断增加，电网的电力供需不断波动。提高燃气涡轮机联合循环（GTCC）电厂部分负荷运行性能已成为一个非常关键的问题。本文提出了一种新的联合循环方案--背压可调燃气涡轮机联合循环（BAGTCC），并提出了相应的运行策略，通过调节涡轮机背压来改善变工况性能。建立了联合循环变工况计算模型，并验证了模型的可靠性。通过对涡轮机内气流马赫数的分析，分析了该方案的可行性。分析比较了GTCC和BAGTCC分别采用两种不同运行策略时的顶循环、底循环和联合循环的部分负荷运行特性。仿真结果表明，BAGTCC可以将涡轮机入口温度（TIT）保持设计值的负荷范围从100-82.4%扩大到100- 63.7%。在该负荷范围内，联合循环效率显著提高，比两种常规运行策略分别提高0-0.52和0-1.76个百分点。此外，该解决方案具有调节顶部和底部循环的功率分配的能力，这意味着当底部循环参与加热时，可以调节热电比。拓宽压缩机流量调节范围可以提高BAGTCC的节能潜力。因此，背压调节是提高GTCC部分负荷效率的有效方法。
Nowadays, power demand and supply of the power grid fluctuate constantly for the increasing proportion of the renewable energy. Improving the operation performance of the gas turbine combined cycle (GTCC) power plant at part-load conditions is becoming a very critical problem. An innovative combined cycle solution, called backpressure adjustable gas turbine combined cycle (BAGTCC) with corresponding operation strategies, is proposed in this paper to improve off-design performance by adjusting turbine backpressure. The off-design calculation models of the combined cycle are built and their reliability is verified. The feasibility of this scheme is analyzed with the Mach number of the gas flow in turbine. Then, the part-load operation characteristics of the topping cycle, bottoming cycle and combined cycle of the GTCC and BAGTCC, operating with two different operation strategies respectively, are analyzed and compared. The simulation results show that, the proposed BAGTCC can broaden the load range, where turbine inlet temperature (TIT) maintains its design value, from 100–82.4% to 100–63.7%. The combined cycle efficiency has been improved significantly in that load range, up by 0–0.52 and 0–1.76 percentage points over the two conventional operation strategies respectively. Furthermore, this solution has the ability to adjust the power distribution of topping and bottoming cycle, which means that the heat-to-electric ratio can be adjusted when the bottoming cycle is involved in heating. The energy saving potential of BAGTCC can be increased by broadening the compressor flow adjustment range. In conclusion, backpressure regulating is an efficient method to improve the part-load efficiency of the GTCC.
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DOI：
10.1115/1.2906516
发表时间：
1990-06
影响因子：
1.5
作者：
Wang Yong-hong
通讯作者：
Wang Yong-hong
影响因子：
6.4
作者：
A. Mehrpanahi;G. Payganeh
通讯作者：
A. Mehrpanahi;G. Payganeh
DOI：
10.1115/gt2013-94482
发表时间：
2013-06
期刊：
--
影响因子：
--
作者：
M. Wei;Yonghong Wang;Huafen Song
通讯作者：
M. Wei;Yonghong Wang;Huafen Song
DOI：
10.1017/s0001925900002560
发表时间：
1962-11
期刊：
The Aeronautical Quarterly
影响因子：
--
作者：
M. D. C. Doyle;S. L. Dixon
通讯作者：
M. D. C. Doyle;S. L. Dixon
影响因子：
6.4
作者：
通讯作者：
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