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An expert system-based modeling and optimization of corrugated plate solar air collector for North Eastern India

  • Suman Debnath
  • Jagannath Reddy
  • Jagadish
  • Biplab DasEmail author
Technical Paper
  • 44 Downloads

Abstract

The present study introduces a fuzzy logic-based expert system (FLES) for evaluating the thermal performance of corrugated plate solar air collector (CPSAC) under different climatic conditions of North Eastern India. The FLES model consists of subtractive clustering with Takagi–Sugeno–Kang fuzzy logic (TSK-FL) model. Work considered mass flow rate (m) 0.0039–0.018 kg/s, collector tilt angles (θ) 30–60°, solar radiation (Q) 230–1086 W/m2, ambient temperature (T) 21–34 °C as input and efficiency (η), exergetic efficiency (\(\eta_{II}\)), temperature rise (∆T), and pressure drop (∆P) as output parameters for the study. First, 270 trails of experimentation have been carried out on CPSAC by varying the input parameter to get a historical database. Second, modeling of the historical data and optimization of CPSAC parameters have been performed. Third, the parametric analysis is also performed to study the effect of parameters on the thermal performance of CPSAC. Parametric results reveal that η increases with m, while up to a certain value of θ, Q, T. At last, the effectiveness and accuracy of the model is judged via various validation tests with experimental data, published data, and artificially generated data. It is observed that FLES model predicts accuracy results with an accuracy of ≈ 97.5% and optimal conditions are at m = 0.00785 kg/s, θ = 45°, Q = 727 W/m2, and T = 29.6 °C, and the corresponding outputs are η = 35.9%, \(\eta_{II}\) = 12.8%, ∆T = 34.7 °C and ∆P = 48.8 Pa.

Keywords

Corrugated plate solar air collector (CPSAC) Energy analysis Exergy analysis Fuzzy logic-based expert system (FLES) Optimization Parametric analysis 

List of symbols

\(A_{\text{c}}\)

Surface area of a collector, m2

\(c_{\text{p}}\)

Specific heat of air at constant pressure, kJ/kg°C

\(I\)

Solar intensity, W/m2

L

Length of a collector, m

\(\mathop m\limits^{.}\)

A mass flow rate of air, kg/s

\(P\)

Fluid pressure, N/m2 or Pa

\(\dot{Q}_{\text{ab}}\)

Energy incident on collector area, W

\(R\)

Specific gas constant, kJ/kg-K

\(T\)

Temperature, °C

W

Width of a collector, m

\(\dot{W}\)

Work rate, (Watt) W

Greek letters

\(\dot{\varepsilon }\)

Energy rate, kW

\(\mathop {\varepsilon x}\limits^{.}\)

Exergy rate, kW

\(\mathop {\dot{\varepsilon}}x_{\text{p}}\)

Exergy considering pressure drop, kW

\(\dot{\varepsilon }x_{\text{dest}}\)

Exergy destruction or rate of irreversibility, kW

\(\eta\)

Energy efficiency, %

\(\eta_{\text{eff}}\)

Thermo-hydraulic efficiency, %

\(\eta_{II}\)

Exergy efficiency, %

Deviation

Subscript

a

Air

ab

Surface of the absorber plate

avg

Average

e

Reference properties (Environment)

in

Inlet

out

Outlet

Notes

Acknowledgements

One of the authors sincerely acknowledges the fund received under a BASE fellowship from IUSSTF. Authors also sincerely acknowledge the fund received from DST, Govt. of India, for development of solar thermal laboratory facility at NIT Silchar, Assam, India under project NRDMS/SC/ST/15/016(c) dated 17/01/2017.

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Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2019

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringNational Institute of Technology SilcharSilcharIndia
  2. 2.Department of Mechanical EngineeringNational Institute of Technology RaipurRaipurIndia

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