Solar, Biomass and Hybrid Dryers - BioEnergy Discussion Lists

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Figure 2.19: Thermostat used in the temperature control mechanismThe completed hybrid solar-biomass cabinet dryer is presented in Figure 2.20. Thedryer has been tested with products such as banana, mushroom, chilly and radish,and the performance is found to be good.Figure 2.20: The solar-biomass hybrid cabinet dryer18
Package 3: Solar-Biomass Hybrid Tunnel DryerConsidering the low land-holding of marginalized rural farmers in developingcountries, a solar tunnel dryer has been designed for drying small quantities ofagricultural products that are harvested by the farmers in the region.This dryer is an adaptation of the tunnel dryer developed at the University ofHohenheim, Germany. The prototype described here is suitable for drying 115 kg offruits (banana) and has been designed and fabricated at AIT.Design DetailsThe dryer (Figure 3.1) consists of a flat plate air-heating solar collector, integratedwith a drying chamber. A common glazing, provided for both the collector and thedrying chamber, forms a tunnel. A biomass stove-heat exchanger assembly is fittedat one end of the tunnel, at the collector side. The biomass stove is used as analternate heat source for the dryer when solar energy is not available.The integrated collector-dryer unit rests on footings made of brick and mortar. Theexact size of the brick column depends on the size of locally available bricks andmay vary from place to place.Several trays are provided inside the drying chamber, on which the products areloaded in a thin layer. During day time, the dryer is operated as a solar dryer. Incloudy weather conditions or at night, the biomass stove may be used.Figure 3.1: The solar-biomass hybrid tunnel dryer19
Page 1: Technology Packages:Solar, Biomass
Page 4 and 5: Technology Packages: Solar, Biomass
Page 6 and 7: PrefaceIt is increasingly becoming
Page 8 and 9: NepalEr. Rishi K. B. ShahVice Presi
Page 10 and 11: viii
Page 12 and 13: Chapter 1PACKAGES DEVELOPED AT AIT,
Page 14 and 15: Glass cover40A - A10535Glass woolin
Page 16 and 17: The main advantage of using the gas
Page 18 and 19: LidWater sealFuel chamberGas burner
Page 20 and 21: 15Ø cylinderStud. 5/16" dia.A101"
Page 22 and 23: The ash scraper slides through a cy
Page 24 and 25: welded at the top with the water se
Page 26 and 27: Other fuels such as saw dust brique
Page 30 and 31: The dimensions and other design par
Page 32 and 33: stove at one end and a chimney at t
Page 34 and 35: Chapter 2PACKAGES DEVELOPED AT RECA
Page 36 and 37: ox dryer. The drawer type tray desi
Page 38 and 39: Figure 5.1: Improved solar cabinet
Page 40 and 41: Dimensions are in mm1.1.1.1.1Figure
Page 42 and 43: Package 6: Improved Solar Tunnel Dr
Page 44 and 45: Dimensions are in mmFigure 6.3: Det
Page 46 and 47: Package 7: Solar-Biomass Hybrid Cab
Page 48 and 49: Dimensions are in mmFigure 7.2: Bac
Page 50 and 51: Telescopic chimney110 cmTop cover88
Page 52 and 53: chimney is removed and the drum is
Page 54 and 55: Chapter 3PACKAGES DEVELOPED AT UP,
Page 56 and 57: Dimensions are in mmFigure 8.2: Dim
Page 58 and 59: ChimneyDryingChamber1DryingChamber2
Page 60 and 61: Package 10: Transpired Collector So
Page 62 and 63: Table 10.2: Technical specification
Page 64 and 65: Chapter 4PACKAGES DEVELOPED AT ITC,
Page 66 and 67: Figure 11.3: Fully assembled box ty
Page 68 and 69: total drying area of 2 m 2 . The dr
Page 70 and 71: The drying chamber is built with ha
Page 72: Renewable Energy Technologies in As

Solar, Biomass and Hybrid Dryers - BioEnergy Discussion Lists

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