Determination of heat transfer coefficients and drying kinetics of red chilli dried in a forced convection mixed mode solar dryer

Ekka, Jasinta Poonam; Muthukumar, P.

doi:10.1016/j.tsep.2020.100607

Cited by 31 publications

(5 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To enhance the temperature inside the solar dryer, a forced convection mixed mode solar dryer was designed, achieving a temperature increase of 10 to 20°C above ambient air. This approach reduced drying time by 50% compared to natural open sun drying, with measured convective and evaporative heat transfer coefficients of 1.63 and 49.7 W/m°C, respectively [5]. Among the various shapes of solar dryers, the quonset shape was found to be the most effective, generating 64% higher temperatures than the surrounding atmosphere.…”

Section: Introductionmentioning

confidence: 87%

Experimental Performance Analysis Of Free And Forced Fully Developed Air Flow Green House Solar Dryer Using Curry Leaves

Kumar M,

et al. 2023

E3S Web Conf.

View full text Add to dashboard Cite

The world is beginning to move away from its consumption of fossil fuels. Various technologies are being developed to make use of renewable energy sources such as wind, solar, and tidal, etc. Solar energy is the best choice among these sources because of it is readily available, abundant, and capable of producing both electric energy and space heating. Solar energy can be used directly or indirectly to dry agricultural and non-agricultural products to preserve them for long a period without formation of fungi. Drying of herbal leaves is an important process in Siddha and Ayurvedic industries to produce herbal medicines in power form. However, as herbal leaves are dried in the open sun, they are susceptible to environmental factors such as rain, insects, and livestock. These disadvantages of open-air drying shall be overwhelmed by greenhouse solar dryer. Greenhouse solar dryer with natural convection, forced convection with hot air supply are the existing methods, but when supplied with hot air, the rise in temperature leads to nutrient loss in herbal leaves. In order to avoid this loss in nutrients, the current work gives a solution that the temperature of forced convection greenhouse dryer can be reduced and controlled by supplying the ambient air at inlet flow in a fully developed air region, and this method can also leads to reduction in colour loss with possibly same or higher drying rate compare to natural convection greenhouse dryer.

show abstract

Section: Introductionmentioning

confidence: 87%

Experimental Performance Analysis Of Free And Forced Fully Developed Air Flow Green House Solar Dryer Using Curry Leaves

Kumar M,

et al. 2023

E3S Web Conf.

View full text Add to dashboard Cite

show abstract

“…Consequently, an efficient drying system and proper equipment can be manufactured. Thus far, several researchers have used mathematical drying models for food and agricultural products [ 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. Unfortunately, investigations on the drying kinetics of cellulose-based RCMs have not been addressed in depth, although the bio-based product has recently become a primary concern worldwide.…”

Section: Introductionmentioning

confidence: 99%

Drying Regimes on Regenerated Cellulose Films Characteristics and Properties

et al. 2022

View full text Add to dashboard Cite

Abundant water content and its interaction with cellulose macromolecules through hydrogen bonding engenders a complex drying process, the circumstances of which have not yet been unveiled. For instance, excessive drying on regenerated cellulose membranes (RCM) causes cracking and severe shrinking, affecting the produced regenerated cellulose film (RCF). Thus, mathematical models in estimating the drying kinetics and required energy to dry RCM are necessary. This study evaluated two drying techniques of oven drying and infrared (IR) drying on RCM at different temperatures of 50–80 °C. Five mathematical models were used, namely Newton, Page, Handreson–Pabis, logarithmic, and Wang–Singh, to adjust the obtained experimental data and were statistically validated using ANOVA to review their effect on the quality of the produced RCF. A logarithmic model and a Wang–Singh model were the best models for oven drying and IR drying of RCM, respectively. It was found that the physical property of the RCF was similar to all drying types. Meanwhile, for mechanical properties, the high temperature of oven drying affected the tensile properties of RCF compared with IR drying. This study is beneficial by approximating the drying kinetics of RCM and defining appropriate drying conditions, which controls the quality of its predictive physical and mechanical properties.

show abstract

“…In this context, how to effectively reduce the power consumption of automatic stirring equipment is an issue requiring the attention from the construction machinery industry [12][13][14][15]. The function of DHS is to heat and dry the cold materials, it is the core component of automatic stirring equipment, and analyzing its thermodynamics is a necessity for improving the heating and drying efficiency of the drying drum and reducing its energy consumption; it is the key to increase the efficiency of the automatic stirring equipment [16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis and Calculation of the Drying and Heating System of Automatic Stirring Equipment

Qu¹

2021

IJHT

View full text Add to dashboard Cite

The drying and heating system (DHS) is the core component of automatic stirring equipment, so analyzing its thermodynamics is crucial for improving the efficiency of the equipment. However, existing empirical thermodynamic formulas generally take certain working conditions as prerequisites, and substituting relevant parameters of DHS into calculation can cause large errors. In view of this problem, this paper attempts to perform thermodynamic analysis and calculation on the DHS of automatic stirring equipment. At first, the material ratio of the automatic stirring equipment was analyzed in the text, and the drying and heating process of mixture was divided into three stages: mixture preheating, mixture drying, and heating mixture to the working temperature. Then, the heat consumption of DHS, the heat consumption of fuel combustion, the consumption rate of the fuel, and the heat efficiency of DHS were measured and calculated. At last, the thermodynamic analysis results of DHS of automatic stirring equipment were given, and the measurement and calculation methods adopted in the paper were proved to be effective.

show abstract

Determination of heat transfer coefficients and drying kinetics of red chilli dried in a forced convection mixed mode solar dryer

Cited by 31 publications

References 15 publications

Experimental Performance Analysis Of Free And Forced Fully Developed Air Flow Green House Solar Dryer Using Curry Leaves

Experimental Performance Analysis Of Free And Forced Fully Developed Air Flow Green House Solar Dryer Using Curry Leaves

Drying Regimes on Regenerated Cellulose Films Characteristics and Properties

Thermodynamic Analysis and Calculation of the Drying and Heating System of Automatic Stirring Equipment

Contact Info

Product

Resources

About