INVESTIGATION ON BIOMASS HEATED AIR ROTARY TRAY DRYER FOR MEDICINAL CROPS.
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Date
2019-08-31
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Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra.
Abstract
The project entitled “Investigation on Biomass Heated Air Rotary Tray Dryer for Drying of Medicinal Crops” is carried out at Department of Unconventional Energy Source and Electrical Engineering, Dr.PDKV, Akola undertaken with the objectives to characterize agro residues based briquettes used for combustion in biomass heated air rotary tray dryer and to evaluate performance of biomass heated air rotary tray dryer for drying of medicinal crops with techno-economic feasibility study of biomass heated air rotary tray dryer.The agro residue was utilized to heat up the air for drying of medicinal crops. The biomass heated air was supply to continuously to the drying chamber for drying of the safed musli roots. To the drying of medicinal crops temperature range was used 40, 45 and 500C. Biomass air heated rotary tray dryer system control the temperature of drying process to help the preservation of medicinal value in safed musli roots. The blower speed of 2100 rpm was used for supply heated air to the drying chamber and tray was rotated to the shaft speed 7rpm. The combustor having fuel feeding rate was change as per the temperature requirement for safed musli roots drying. The drying of safed musli to the temperature 40, 45 ,50 0C in biomass heated air rotary tray dryer and open sun dying results observed the inside drying chamber and combustor temperature were much higher than the ambient temperature during drying time. The biomass air heated rotary tray drying for medicinal crops no atmospheric condition was affected by this drying process.
The safed musli root was successfully dried in the biomass heated air rotary tray dryer. The drying process observed that drying time was minimized and organic content obtained more in biomass heated air rotary tray dryer was found better than to open sun drying. The quantitative analysis showed that the traditional drying i.e., open sun drying took 17 h for drying of safed musli roots to remove moisture content from 420.83% (db) to 9.37%(db), while biomass heated air rotary tray dryer took only 14 h for drying of safed musli roots during 400C, at 450Crequired 12h and 500C required 10h and moisture content was removed 8.33 %(db), 9.16%(db) and 8.74 %(db) respectively. The drying of safed musli roots fuel required in 400C was0.848 kg/h, 450C was 1.329 kg/h and 500C used 1.793 kg/h fuel consumption was observed respectively. The drying chamber efficiency during 400C, 450C and 500C was found 47.58%, 48.51% and44.75% respectively. The composition of the dried sample for the 450C drying temperature were observed Saponin (6.14%), Alkaloid (3.26%) and other carbohydrate, protein and fiber was found more than the drying at 400C and 500C respectively. The colour value best observed in a 450C was L* =88.40, a* = 0.54, b* = 7.37. Water activity at 450was less aw=0.48at temperature 37.40C.
The drying kinetics of dried safed musli roots were studied by using mathematical models viz., Lewis, Page, Henderson-Pabis, Logarithmic, Two term, Modified Henderson and Pabis and Wang and Singh models. Among all these models Two term model best fitted in400C and 450Cthe value of R2 =0.9991, χ2=0.0001, MBE=-0.0036, RMSE=0.0108 and R2= 0.9992, χ2 =0.0001, MBE=-0.0029, RMSE=0.0109 was observed respectively. The 500C Logarithmic drying mathematical models was best fitted the value of R2= 0.9992, χ2 =0.0001, MBE=-0.0029, RMSE=0.0109 for biomass heated air rotary tray dryer and open sun drying Henderson-Pabis model best fittedR2=0.9891, χ2=0.0018, MBE=-0.0065 and RMSE=0.0404value was obtained respectively. On the basis of economic analysis, payback period of the system was found to be 7 month 2 day for drying of safed musli roots in biomass heated air rotary tray dryer. The system was found economically feasible and produced good quality dried produce in biomass heated air rotary tray dryer for medicinal crops.
Description
This experiment was carried out in the month march of 2018 -19. In this performance of “Biomass Heated Air Rotary Tray Dryer for Medicinal Crops” was evaluated at no load and full load test for drying of the safed musli roots. The quantity of the product loaded, moisture content of the product at initial and during drying was measured. The product drying time, drying temperature in dryer, solar radiation intensity, ambient temperature, and relative humidity were measured, during the test run. The drying chamber efficiency on the basis of inlet temperature, ambient temperature and outlet temperature was calculated during experimentation. Fuel consumption was measured during drying of safed musli roots.
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Citation
WANKHADE, PALLAVI MADHUKAR. (2019). Investigation on biomass heated air rotary tray dryer for medicinal crops. Department of Unconventional Energy Sources and Electrical Engineering, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Tech. 2019. Print. xvi, 117p. (Unpublished).