Affiliation:
1. Centre for Energy Research , Konkoly Thege M. út 29-33, 1121 Budapest , Hungary
Abstract
Abstract
A nonlinear 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 proposed model was validated using the state functions measured for the solar air 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.
Subject
Geochemistry and Petrology,Mechanical Engineering,Energy Engineering and Power Technology,Fuel Technology,Renewable Energy, Sustainability and the Environment
Reference22 articles.
1. IEA
, 2022, “Global CO2 Emissions Rebounded to Their Highest Level in History in 2021,” https://www.iea.org/news/global-co2-emissions-rebounded-to-their-highest-level-in-history-in-2021, Accessed August 2, 2022.
2. Mercom India, 2021, “Solar’s Share in India’s Installed Power Capacity Mix Increases to 12.4% as of Q4 2021,”https://www.mercomindia.com/magazine/book?pdf=https://mercomindia.s3.ap-south-1.amazonaws.com/wpcontent/uploads/2022/01/Mercom-India-Clean-Energy-Magazine-Dec-2021-1.pdf
3. Energy and Exergy Analyses of Solar Drying of Black Cardamom (Amomum subulatom Roxburgh) Using Indirect Type Flat Plate Collector Solar Dryer;Dash;J. Food Process Eng.,2022
4. Energy and Exergy Analysis of Corrugated Plate Solar Collector by Forced Convection Using Two Different Absorber Plate Material;Pathak;Heat Mass Transfer/Waerme-Und Stoffuebertragung,2021
5. An Energy and Exergy Analysis of Water and Air With Different Passage in a Solar Collector;Assari;Energy Sources, Part A: Recovery, Util. Environ. Eff.,2014