用Hammerstein—Wiener估计法分析非能动热力系统的火用

IF 2.6 3区 工程技术 Q3 ENERGY & FUELS
A. Dhaundiyal
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引用次数: 0

摘要

采用非线性系统辨识方法,利用系统(火用)中的非线性,将其分解为两个或多个相互关联的单元。采用Hammerstein Wiener(H-W)方法,利用非线性和线性块的组合来描述被动热力系统的动力学。这里,线性块是一个离散传递函数,它象征着模型的动态分量。采用单输入单输出和多输入单输出相结合的方法建立了火用模型。利用被动太阳能热系统收集器的状态特性对所提出的模型进行了验证。焓变化的平均绝对百分比误差(MAPE)在−0.01%至0.01%的范围内,而随着系统熵随时间的变化,它在−0.06%至0.02%之间变化。同样,在评估系统火用时遇到的MAPE在−0.066%至−0.0017%的闭合区间内。H-W模型在第一和第二通道的平均火用增益分别为0.90 kJ·kg−1(8.10 g·s−1)、0.61 kJ·kg−1(10.10 g·s.−1)和0.46 kJ·kg/1(12.10 g·s–1),以及0.57 kJ·kg-1(8.10 g,和0.79 kJ·kg−1(12.10 g·s−1)。所提出的模型与验证数据拟合良好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exergy Analysis of a Passive Thermal System Using Hammerstein-Wiener Estimation
A non-linear system identification approach was used to exploit the nonlinearly in the exergy of the system and reduce it into two or more interconnected elements. The Hammerstein-Wiener (H-W) methodology was adopted to describe the dynamics of a passive thermal system using a combination of nonlinear and linear blocks. Here, the linear block is a discrete transfer function which symbolizes the dynamic component of the model. The combination of Single Input Single Output (SISO) and Multiple Input Single Output (MISO) was adopted to develop the exergy model. The proposed model was validated using the state properties measured for the passive solar thermal system collector. The mean absolute percentage error (MAPE) for enthalpy changes falls in the domain of −0.01% to 0.01%, whereas it varied from −0.06% to 0.02% as the entropy of the system changed with time. Similarly, the MAPE encountered while evaluating the exergy of the system, was in the closed interval of −0.066% to −0.0017%. The average exergy gain by the H-W model across the Ist and IInd passages was, respectively, 0.90 kJ·kg−1 (8.10 g·s−1), 0.61 kJ·kg−1 (10.10 g·s−1) and 0.46 kJ·kg−1 (12.10 g·s−1), and 0.57 kJ·kg−1 (8.10 g·s−1), 0.48 kJ·kg−1 (10.10 g·s−1), and 0.79 kJ·kg−1 (12.10 g·s−1). The proposed model exhibited good fitting with the validation data.
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来源期刊
CiteScore
6.40
自引率
30.00%
发文量
213
审稿时长
4.5 months
期刊介绍: Specific areas of importance including, but not limited to: Fundamentals of thermodynamics such as energy, entropy and exergy, laws of thermodynamics; Thermoeconomics; Alternative and renewable energy sources; Internal combustion engines; (Geo) thermal energy storage and conversion systems; Fundamental combustion of fuels; Energy resource recovery from biomass and solid wastes; Carbon capture; Land and offshore wells drilling; Production and reservoir engineering;, Economics of energy resource exploitation
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