An efficient termination control strategy of air-vented dryer for fabric drying

Abstract

Purpose The purpose of this paper is to develop an efficient termination control strategy of air-vented dryer in term of energy saving, improving smoothness and reducing microscopic damage of fiber. Design/methodology/approach A simple, low cost termination control strategy is developed by testing the instantaneous humidity of exhaust air and then deducing the drying degree of fabric in process. The practicability evaluation of this novel strategy was investigated by using both experimental and mathematical approaches. The effect of termination control strategy on drying efficiency and fabric apparent properties were also discussed. Findings Termination control strategy significantly affects drying time, energy consumption, smoothness and microscopic of fiber. Specially, a novel termination control strategy that the combination of equilibrium moisture content of fabric in ambient environment and relative humidity of exhaust air in exhaust duct is workable and can save 25.2 percent of energy consumption, 26.7 percent of the drying time and improve 0.7 grade of the appearance smoothness, as well as significantly reduce the microscopic damage of fiber compare to the original control strategy of dryer. This indicates possible ways to minimize drying energy consumption and dryer damage by reducing unnecessary migrate out of the water from the clothes. Practical implications The paper is helpful in not only the development of new drying product but also the optimization of appearance smoothness of fabric after drying and reduce the microscopic damage of fiber. Originality/value A novel termination control strategy of dryer is applied to improve drying efficiency of dryer and reduce fabric damage.

Determining optimal drying conditions through analysis of the sample movement in a heat pump dryer

“…Furthermore, a study on movement comparison at various flow rates, heater voltages, and loads confirmed that the movement of the entire drum increases with a faster flow rate and smaller load. 4 , 5…”

“…Furthermore, a study on movement comparison at various flow rates, heater voltages, and loads confirmed that the movement of the entire drum increases with a faster flow rate and smaller load. 4,5 Yu et al proposed a drying program that reduced the energy consumption with a lower air flow rate in the initial drying stages, and then the drying speed was increased with an increasing air flow rate in the latter stages. 6 Through this approach, the drying efficiency was increased; however, the fabric shrinkage and damage were intensified.…”