Energy and Exergy Analysis of Forced Convective Ribbed Smoked Sheet Drying Process

Abstract

Present work is analysis energy and exergy of forced convective ribbed smoked sheet drying process. The capacity of smoking room is (apoximately1500 sheets). The prepare before drying process by fresh rubber sheet squeezed to thin shape. Height 90-100 cm.*width 40-50 cm. and thickness 3-4 mm. after brings to dried ambient temperature during 10-12h. The initials moister of rubber about 35-40% before starts drying process. The work is varied are velocity inlet and moisture content of fuel-wood. Velocity is varied between 12 and 14 m/s and moisture content varied between 24-55% (Dry basis). The experiments are recorded temperature (inside outside and ambient of smoking room), weight of rubber sheet sample and fuel-wood used the combustion. The thermal analysis of drying room used to follow the first law of thermodynamic methodology. The thermal efficiency of drying all conditions between 12.3-16.7 %. The specific energy consumption between (SEC) between 13.5-16.9 MJ/kg of water evaporated. All conditions used drying time at 36 h. Considering, the experiments used wet fuel-wood (inlet velocity 12 m/s, 55% db of fuel-wood and inlet velocity 14 m/s, 53% db of fuel-wood) have the thermal efficiency are the highest and the lowest of overall specific energy consumption (SEC). Moreover, Percentage of rubber good quality have 100%. Conclude, the rubber smoking room optimize with the wet fuel-wood. Comparison between the forced convection rubber smoking room viii Dejchanchaiwong et al. (2017a) same type. Results, the present work can reduce SEC from 16.4 to 13.2 MJ/kg of water evaporated and drying time 48h to 36h. Moreover, present work increased thermal efficiency from 14.3% to 16.7%. The exergy analysis of drying room finds to availability energy of system. The overall exergy efficiency between 2.2-5.8. Considering, second ‘law efficiency is the highest (inlet velocity 12 m/s, 24% db of fuel-wood) but thermal efficiency and specific energy consumption (SEC) are the lowest. Due to second ‘law efficiency is direct variation with temperature inlet and outlet of smoking room. In condition inlet velocity 12 m/s, 24% (db) of fuel-wood have average temperature is the highest (78.0±7.5) comparison with other condition. But, percentage of good quality is the lowest (54.7%) comparison with other conditions. Because, the high temperature rubber sheet has bubbles and dark brown not follow standard of RSS 3 Conclude, second ‘law efficiency is the highest not optimize for the smoking room.