will adsorb the moisture from the Air and discharge Dry air through the outlet as it is expected. An air pump is used to circulate the air though the system. The dehumidification is carried out at room temperature to obtain maximum performance of the silica gel. Manometers are used for measuring the actual flow rate through the system. A hygrometer is used to measure the humidity at the inlet as well as the outlet of the silica gel column. Observation A] Air flow rate B] Relative humidity no %RH of air at Flow rate Minimum Total Weight gain value of RH% Saturation of column at outlet Time 1 50% 33 LPM 17.6 % 150 Min 48 grams 2 25% 27 LPM 8.3 % 128 Min 48 grams 3 25% 33 LPM 10.8 % 120 Min 48 grams 4 50% 27 LPM 14.2 132 Min 48 grams We have observed increase in temperature in silica gel. Literature reports lower water holding capacity at lower temperatures hence it was thought of cooling silica gel using evaporative cooling Selection of structure for dryer For drying during winter season dry air circulation is naturally available was thought to be a choice of preference. Relative humidity of air during 12 noon was about 25% to 35%. A design to utilize this dry and relatively cold current was the idea behind choice of the structure. A turbo ventilator as used for industrial ventilation was thought to be used for generating air currents for drying. The ventilator is majorly wind driven supported by convection currents. To utilize convection currents we thought of solar chimney effect.
will adsorb the moisture from the Air and discharge Dry air through the outlet as it is expected. An air pump is used to circulate the air though the system. The dehumidification is carried out at room temperature to obtain maximum performance of the silica gel. Manometers are used for measuring the actual flow rate through the system. A hygrometer is used to measure the humidity at the inlet as well as the outlet of the silica gel column. Observation A] Air flow rate B] Relative humidity no %RH of air at Flow rate Minimum value of RH% at outlet Total Saturation Time Weight gain of column 1 50% 33 LPM 17.6 % 150 Min 48 grams 2 25% 27 LPM 8.3 % 128 Min 48 grams 3 25% 33 LPM 10.8 % 120 Min 48 grams 4 50% 27 LPM 14.2 132 Min 48 grams We have observed increase in temperature in silica gel. Literature reports lower water holding capacity at lower temperatures hence it was thought of cooling silica gel using evaporative cooling Selection of structure for dryer For drying during winter season dry air circulation is naturally available was thought to be a choice of preference. Relative humidity of air during 12 noon was about 25% to 35%. A design to utilize this dry and relatively cold current was the idea behind choice of the structure. A turbo ventilator as used for industrial ventilation was thought to be used for generating air currents for drying. The ventilator is majorly wind driven supported by convection currents. To utilize convection currents we thought of solar chimney effect.