Abstract
This paper analyzed the drying process of the household gas clothes dryer (GCD) based on the principle of heat and mass transfer. The drying models in three scenarios were established: natural gas burned in combustion chamber, ambient air mixed with exhausted gas in hot gas duct, and clothes were dried in the drying drum. The simulation of the drying process was performed on MATLAB software. And the effectiveness of the drying model was verified by comparison with experiment results. The effects of gas flow rate, dry mass of clothes, ambient temperature, ambient humidity, textile type, and moisture extraction rate (MER) on the performance of dryers were studied. This paper provided a theoretical basis for the design and optimization of GCDs. It was found that the drying time of the gas clothes dryer was mostly affected by the gas flow and dry mass of clothes, and the specific moisture extraction rate (SMER) was mostly affected by the ambient temperature and relative humidity. The nylon clothes have the fastest MER and the smallest SMER. Moreover, reducing operating time in falling-rate drying period can improve energy efficiency.
Highlights
Clothes dryers (CDs) have become the basic necessities of life for ordinary families in developed countries, and they will gradually enter Chinese market with Chinese socioeconomic progress [1]
Heat and mass transfer principle of water transfer process is described and mathematical models of drying process are derived. e whole simulation platform is performed on MATLAB software, and the simulation results are verified with the corresponding experiments
Where din is the moisture content of dried hot gas at the drum inlet, ma,w,1 is the mass flow rate of water vapor brought by the air which involves in combustion reaction, ma,w,2 is the mass flow rate of water vapor brought by the mixed air, and min is the air mass flow rate at the drum inlet
Summary
Clothes dryers (CDs) have become the basic necessities of life for ordinary families in developed countries, and they will gradually enter Chinese market with Chinese socioeconomic progress [1]. Nordon and David [5] used a mathematical model to describe coupled diffusion of heat and mass transfer and studied the rate of moisture exchange between the solid and gaseous phases. They neglected the moisture content on the clothes surface. Gluesenkamp et al [15] used the heat and mass transfer effectiveness model along with the empirical data from several different clothes dryers to develop an accurate and versatile correlation that can be applied to the modeling and simulation of clothes dryer performance. Heat and mass transfer principle of water transfer process is described and mathematical models of drying process are derived. e whole simulation platform is performed on MATLAB software, and the simulation results are verified with the corresponding experiments
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