Energy and exergy analysis economic of continuous vibrating fluidized bed drying on celery drying

Abstract

Abstract This paper present the experimental work of celery drying using continuous vibrating fluidized bed drying. Fresh celery leaves dried at 50°C, 60°C and 70°C in continuous vibrating fluidized bed dryer with a dimension of 2350 mm × 300 mm. Energy and exergy analysis was conducted to determine the performance of the system, among others, energy utilization, energy efficiency, and efficiency of the exergy so it can be known potential energy savings can be obtained. From the calculation results can be concluded that the increase in drying temperature will increase energy utilization and energy utilization ratio and decrease the efficiency of the exergy. Average energy utilization ratio at 50°C is 0.0768, at 60°C is 0.1199 and at 70°C is 0.1682. Exergy efficiencies decrease with increasing temperature. Average exergy efficiencies are 0.19, 0,16 and 0.17 for 50°, 60° and 70°C drying temperature respectively. The main factor that causes thermodynamic inefficiency is the exergy that leaves the system, exergy destruction and loss of exergy to the surrounding air.