Engineering

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Browsing Engineering by Author "Alfiya, P.V."

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    Design and working principles of CIFT solar hybrid dryers
    (ICAR - Central Institute of Fisheries Technology, Cochin, 2019) Alfiya, P.V.; Murali, S.; Delfiya, D.S.A.; Samuel, M.P.
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    Development of an energy efficient portable convective fish dryer
    (Society of Fisheries Technologists (India), 2019) Alfiya, P.V.; Murali, S.; Delfiya, D.S.A.; Samuel, M.P.
    A portable multipurpose electrical dryer of 10 kg capacity was designed and developed for drying of fishe and other agricultural products. The dryer consists of a drying chamber with total drying area of 2.8 m2, fan, heating element and exhaust vent. The dryer was fabricated using locally sourced materials. Under ‘no-load’ conditions, the drying chamber attained highest temperature of 50±5°C within 60 min of operation. Relative humidity and velocity of drying air inside the drying chamber were observed to be 65% and 0.8 m/s respectively. The study of energy consumption pattern indicated a drying efficiency of 21.42%. A performance evaluation study of the dryer was done for sardine and the maximum drying time required for complete drying was eight hours. Results showed that the entire drying processes occurred under falling rate period. A logarithmic model fitted to the drying data very well for the specified range of drying conditions.
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    Drying characteristics of nandan (Chanda nama) fish in portable house hold electrical dryer
    (Central Institute of Fisheries Technology, Cochin, 2018) Delfiya, D.S.A.; Murali, S.; Alfiya, P.V.; Samuel, M.P.
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    Drying characteristics of shrimp (Metapenaeus dobsoni) in electrical dryer
    (Pantnagar Journal of Research, 2020) Delfiya, D.S. Aniesrani; Murali, S.; Alfiya, P.V.; SAMUEL, MANOJ P.
    This study was conducted to investigate the drying characteristics of shrimp (Metapenaeus dobsoni) in an electrical dryer. Initial moisture content of shrimps was decreased from 73– 79% (wb) to 8 – 10% (wb) final moisture in 8 h. Drying was performed at drying air temperature and air velocity of 55±2°C and 0.8±0.04 m/s respectively, and drying parameters were recorded at 1 h interval. Drying rate was found to be reduced with drying time and drying followed the falling rate drying period. Drying characteristics curves were plotted and various drying models were fitted to describe drying kinetics of shrimps. Drying models suitability was analysed based on higher coefficient of determination value (R2), lower root mean square error and reduced chi-square values (χ2). Midilli model was selected as the best fit model with highest R2 (0.999), lowest χ2 (0.00002) and root mean square error (0.004) values. Results proved that hot air drying using electrical dryer has many advantages over sun drying like better control over drying temperature and moisture content, uniformity in drying and less drying time.
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    Drying kinetics and quality characteristics of indian mackerel (Rastrelliger kanagurta) in solar-electrical hybrid dryer
    (Taylor & Francis Group, LLC, 2019) Murali, S.; Kumar, K.S.; Alfiya, P.V.; Delfiya, D.S.A.; Samuel, M.P.
    The aim of the study was to investigate the drying kinetics and quality Solar energy; hybrid dryer; characteristics of Indian mackerel dried under solar-electrical hybrid dryer modeling; drying kinetics; (S-EHD). Fresh Indian mackerel fishes (Rastrelliger kanagurta) were cleaned, quality cut into butterfly fillets, and salted overnight using a dry salting method (saltto- fish ratio, 1:3). The salted mackerel was dried in a S-EHD at the air temperature of 45-55°C, relative humidity of 47-62%, and air velocity of 0.60-0.80 m/s. Open sun drying (05D) of salted Indian mackerel was conducted to compare with S-EHD. The moisture content of the salted mackerel (61.5% w.b.) was reduced to 31.8% (w.b.) under S-EHD and 30.25% (w.b) under OSD in 8 and 32 h, respectively. The drying rate curve showed that mackerel drying occurred under falling-rate drying period in both the drying methods. A drying efficiency of 23.81% was observed for salted Indian mackerel drying under S-EHD. Diffusion approach and two-term models were selected to accurately predict the drying behavior of mackerel under S-EHD and OSD, respectively. Total volatile base nitrogen (TVB-N), trimethylamine, and thiobarbituric acid analysis of dried samples revealed that the mackerel dried under S-EHD was better than OSD. In the sensory analysis, samples dried under S-EHD recorded highest overall acceptability score.
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    Empirical modelling of drying characteristics of elongate glassy perchlet (Chanda nama) (Hamilton, 1822) in solar hybrid dryer
    (2018) Alfiya, P.V.; Murali, S.; Delfiya, D.S.A.; Samuel, M.P.
    This study was conducted to evaluate the performance of solar dryer with electrical back-up to produce quality dried Glassy perchlet (Chanda nama). Insolation of the experimental region varied from 25 to 1025 W m-2. Atmospheric temperature showed a variation between 29.5 to 34.5°C. Relative humidity outside the dryer ranged from 56 to 76.5% showing a direct relationship with temperature. Drying experiment was carried out for 10 h at drying air temperature of 60°C. Relative humidity and velocity of drying air inside the drying chamber was 68% and 0.8 m s-1 respectively. Drying conditions were maintained inside the dryer by electrical back-up. Weight loss of pre-processed C. nama during drying was measured at 1 h duration. Drying characteristic data were fitted into empirical drying models. Two-term model was found to be the best fit for the drying characteristic data under specified conditions (R2=0.998, RMSE=0.016 and χ 2=0.00027).
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    Engineering interventions in aquatic weed control
    (2017) Alfiya, P.V.; Samuel, M.P.
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    Engineering tools and technologies for fish processing : A profitable venture in agri-business
    (ICAR - Central Institute of Fisheries Technology, Cochin, 2018) Samuel, M.P.; Murali, S.; Delfiya, D.S.A.; Alfiya, P.V.
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    Engineering tools and technologies for fish processing: a profitable venture in agri-business
    (ICAR - Central Institute of Fisheries Technology, Cochin, 2018) Samuel, M.P.; Murali, S.; Delfiya, D.S.A.; Alfiya, P.V.
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    Infrared fish dryer
    (Central Institute of Fisheries Technology, Cochin, 2018) Delfiya, D.S.A.; Murali, S.; Alfiya, P.V.; Samuel, M.P.
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    Portable multi purpose electrical dryer - an aid to year round dry fish production
    (2017) Alfiya, P.V.; Murali, S.; Delfiya, D.S.A.; Samuel, M.P.
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    Smart packaging: revolutionizing the era of food packaging
    (2017) Alfiya, P.V.; Murali, S.; Delfiya, A.; Samuel, M.P.