Nidhin A R | APJ Abdul kalam technological university (original) (raw)
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vol. 2, Iss. 6 by Nidhin A R
The vortex tube, also known as the Ranque-Hilsch vortex tube, is a mechanical device that separat... more The vortex tube, also known as the Ranque-Hilsch vortex tube, is a mechanical device that separates a compressed gas into hot and cold streams. The air emerging from the "hot" end can reach temperatures of 200 °C, and the air emerging from the "cold end" can reach-50 °C. It has no moving parts. This study is aimed towards presenting the CFD analysis of vortex tube carried out to gain an understanding about influence of different inlet shapes on its performance are compared and analyzed while other geometrical parameters are held constant. The energy separation has been observed for five different inlet shapes and air as working fluid.
Drying is probably one of the oldest methods of food preservation. The tray dryer is widely used ... more Drying is probably one of the oldest methods of food preservation. The tray dryer is widely used in a variety of applications because of its simple design and capability to dry products at high volume. A drying system incorporating the HP (heat pump) was designed and constructed, along with necessary instrumentation to gather data on the properties of process air as well as real-time weight of the material being dried (mango slices). Drying was carried out in three different temperatures 50, 55 and 600C. The design of the system allowed for conducting drying with recirculation of air as well as use of backup electrical heaters. Comparisons of all three cases were made and it was found that drying time decreases with increase in temperature. Also drying rate increases with temperature. In terms of energy consumption, the process of HP assisted drying is more expensive, but drying time justifies its cost.
The vortex tube, also known as the Ranque-Hilsch vortex tube, is a mechanical device that separat... more The vortex tube, also known as the Ranque-Hilsch vortex tube, is a mechanical device that separates a compressed gas into hot and cold streams. The air emerging from the "hot" end can reach temperatures of 200 °C, and the air emerging from the "cold end" can reach-50 °C. It has no moving parts. This study is aimed towards presenting the CFD analysis of vortex tube carried out to gain an understanding about influence of different inlet shapes on its performance are compared and analyzed while other geometrical parameters are held constant. The energy separation has been observed for five different inlet shapes and air as working fluid.
Drying is probably one of the oldest methods of food preservation. The tray dryer is widely used ... more Drying is probably one of the oldest methods of food preservation. The tray dryer is widely used in a variety of applications because of its simple design and capability to dry products at high volume. A drying system incorporating the HP (heat pump) was designed and constructed, along with necessary instrumentation to gather data on the properties of process air as well as real-time weight of the material being dried (mango slices). Drying was carried out in three different temperatures 50, 55 and 600C. The design of the system allowed for conducting drying with recirculation of air as well as use of backup electrical heaters. Comparisons of all three cases were made and it was found that drying time decreases with increase in temperature. Also drying rate increases with temperature. In terms of energy consumption, the process of HP assisted drying is more expensive, but drying time justifies its cost.