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Gene expression programming approach for the estimation of moisture ratio in herbal plants drying with vacuum heat pump dryer

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Abstract

The determination of drying behavior of herbal plants is a complex process. In this study, gene expression programming (GEP) model was used to determine drying behavior of herbal plants as fresh sweet basil, parsley and dill leaves. Time and drying temperatures are input parameters for the estimation of moisture ratio of herbal plants. The results of the GEP model are compared with experimental drying data. The statistical values as mean absolute percentage error, root-mean-squared error and R-square are used to calculate the difference between values predicted by the GEP model and the values actually observed from the experimental study. It was found that the results of the GEP model and experimental study are in moderately well agreement. The results have shown that the GEP model can be considered as an efficient modelling technique for the prediction of moisture ratio of herbal plants.

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Abbreviations

e:

Experimental value (moisture ratio)

n:

Total number of data

MR:

Moisture ratio, dimensionless

M:

Moisture content (kg moisture/kg dry matter)

Me :

Equilibrium moisture content (kg moisture/kg dry matter)

M0 :

Initial moisture content (kg moisture/kg dry matter)

MAPE:

Mean absolute percentage error

p:

Predicted value (moisture ratio)

RMSE:

Root-mean-squared error

R2 :

R-square

T:

Temperature (°C)

t:

Drying time (min)

x1, …xn :

Relative errors in the individual factors

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Acknowledgements

Authors wish to thank the Süleyman Demirel University Research Foundation (SDUBAP) for the financial support, under Project Numbers: 3447-YL1-13 and 3443-YL1-13.

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Authors and Affiliations

  1. Technology Faculty, Süleyman Demirel University, 32260, Isparta, Turkey

    Erkan Dikmen, Mahir Ayaz, Doğan Gül & Arzu Şencan Şahin

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  1. Erkan Dikmen
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  2. Mahir Ayaz
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  3. Doğan Gül
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  4. Arzu Şencan Şahin
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Correspondence to Arzu Şencan Şahin.

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Dikmen, E., Ayaz, M., Gül, D. et al. Gene expression programming approach for the estimation of moisture ratio in herbal plants drying with vacuum heat pump dryer. Heat Mass Transfer 53, 2419–2424 (2017). https://doi.org/10.1007/s00231-017-1998-3

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  • DOI: https://doi.org/10.1007/s00231-017-1998-3

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