Mathematical modeling, simulation and validation of a boiler drum: Some investigations
Mathematical modeling, simulation and validation of a boiler drum: Some investigations
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DOI：
10.1016/j.energy.2017.02.140
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发表时间：
2017-05-01
期刊：
影响因子：
9
通讯作者：
Nataraj, P. S. V.
中科院分区：
文献类型：
--
作者：
Sunil, P. U.;Barve, Jayesh;Nataraj, P. S. V.
锅炉或蒸汽发生器是整个行业广泛使用的能量转换设备，以产生用于发电或公用事业目的的蒸汽。最近，有一个越来越多的需求，以更灵活和敏捷的方式操作的火电厂锅炉，由于可再生能源的渗透，过剩的发电能力，在线交易等数学模型表示动态行为的电厂锅炉在广泛的操作场景，如启动和负载变化是必要的，这样的可操作性和控制研究。然而，锅炉模型适合这样的调查是稀缺的文献。本文提出了一个混合的标准集总模型表示锅炉汽包动态和一维分布式模型的基础上两相热工水力稳定性代码来表示蒸发器子系统的动态。该模型进行了验证，使用广泛的操作工厂从一个联合循环电厂的锅炉机组收集的数据。此外，该模型的性能进行了比较与其他两个著名的第一性原理为基础的模型。用于比较的性能指标是小范围精度，大范围精度，相对计算时间和内存要求。所提出的模型被发现优于现有的模型，特别是对于大范围的动态操作场景。(C)2017爱思唯尔有限公司版权所有
The boiler or steam generator is a widely-used energy conversion equipment across the industry to generate steam for power generation or utility purposes. Recently, there is an increasing demand to operate the thermal power plant boilers in more flexible and agile manner due to renewable energy penetration, excess generation capacity, online trading, etc. Mathematical models representing dynamic behavior of the power plant boilers across wide-range operational scenarios like start-ups and load changes are necessary for such operability and control studies. However, boiler models suitable for such investigations are scarce in the literature. This paper presents a mixed standard lumped model representing the boiler-drum dynamics and a 1-dimensional distributed model based on two-phase thermal hydraulic stability code to represent dynamics of evaporator sub-system. The model is validated using wide-range operational plant data collected from a boiler unit of a combined cycle power plant. Besides, the performance of the proposed model is compared with other two well-known first principle based models. The performance metrics used for comparisons are small range accuracy, wide range accuracy, relative computational time and memory requirements. The proposed model is found to out-perform existing models, particularly for the wide-range dynamic operational scenario. (C) 2017 Elsevier Ltd. All rights reserved.