Experimental investigation of forced convection and desiccant integrated solar dryer

Shanmugam, Vigneshwaran; Natarajan, E.

doi:10.1016/j.renene.2005.05.019

Cited by 117 publications

(42 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, only capillary and liquid diffusion theories are, generally, applicable to the drying of food materials [22]. Diffusion is the dominant physical mechanism governing moisture movement in the material [23] [24] [25], which is dependent on the moisture content of the samples [26]. The moisture contents were expressed on dry basis, which is more convenient for modeling [27] [28].…”

Section: Mechanism Of Dryingmentioning

confidence: 99%

Kinetic Models for Drying Techniques—Food Materials

Inyang¹,

Oboh²,

Etuk³

2018

ACES

117

View full text Add to dashboard Cite

Drying operations can help in reducing the moisture content of food materials for avoidance of microbial growth and deterioration, for shelf life elongation, to minimize packaging and improving storage for easy transportation. Thin-layer drying of materials is necessary to understand the fundamental transport mechanism and a prerequisite to successfully simulate or scale up the whole process for optimization or control of the operating conditions. Researchers have shown that to rely solely on experimental drying practices without mathematical considerations for the drying kinetics, can significantly affect the efficiency of dryers, increase the cost of production, and reduce the quality of the dried product. An effective model is necessary for the process design, optimization, energy integration and control; hence, the use of mathematical models in finding the drying kinetics of agricultural products is very important. The statistical criteria in use for the evaluation of the best model(s) has it that coefficient of determination (R 2 ) has to be close to unity while the rest statistical measures will have values tending to zero. In this work, the essence of drying using thin-layer, general approaches to modeling for food drying mechanisms thin layer drying models and optimization of the drying processes have been discussed.

show abstract

Section: Mechanism Of Dryingmentioning

confidence: 99%

Kinetic Models for Drying Techniques—Food Materials

Inyang¹,

Oboh²,

Etuk³

2018

ACES

117

View full text Add to dashboard Cite

show abstract

“…In these circumstances, the thermal performance of the solar greenhouse is described by a thermal balance that shows the distribution of the incident solar energy into useful energy gain (Q u ), and thermal losses (Q loss ), as used by several investigators (Duffie and Beckman, 1991;Bargach, et al, 2000;Shanmugam and Natarajan, 2006;Hossain and Bala, 2007;Abdellatif, et al, 2010). The heat energy balance can be computed as follows:…”

Section: Mathematical Modelingmentioning

confidence: 99%

Utilization of a Solar Greenhouse as a Solar Dryer for Drying Dates under the Climatic Conditions of the Eastern Province of Saudi Arabia

Almuhanna¹

2011

JAS

View full text Add to dashboard Cite

The goal of this project was to evaluate the feasibility of using a solar greenhouse as a solar dryer for drying dates. We attempted to analyze the thermal performance and thermal balance of the solar greenhouse. An experimental gable-even span greenhouse (solar greenhouse) was installed at the experimental research station at King Faisal University (latitude 25.4ºN, longitude 49.6ºE, and altitude 142 m above sea level) and functioned during October 2010. We evaluated the thermal performance analysis of the solar greenhouse (active or dynamic system) based on the thermal balance equations. The obtained results revealed that the daily average solar energy available outside the solar dryers was 15.921 kWh, and 12.335 kWh was available inside the solar greenhouse for an average effective transmittance of 77.48%. Of the 12.335 kWh available inside the solar greenhouse, 7.414 kWh was converted into useful heat gain that could be used for the drying process, 3.947 kWh was lost by conduction and convection, and 0.686 kWh was lost by thermal radiation. The solar energy available inside the solar greenhouse produced a 14.1°C increase in the inside air temperatures versus the outside temperature (33.6°C) and reduced the relative humidity of the inside air versus the outside air (35.3%) by 9.6%. The daily average overall thermal efficiency of the solar greenhouse during the experimental period was 57.2%. Consequently, 42.8% of the solar energy available inside the solar greenhouse was lost. The predicted thermal balance for the solar greenhouse was well validated with that measured during the experimental period (r= 0.999) indicating an excellent agreement.

show abstract

“…Among other applications, this material has been used practically in various phase change material applications [1], closed sorption processes [2], desiccant cooling or dehumidification [3,4], refrigeration [5], drying [6,7], water recovery or extraction from atmospheric air [8e10], sorption [11] and thermochemical energy storage [12]. Calcium chloride is also applied in association (composites) with other materials in order to improve their suitability for the above-mentioned applications.…”

Section: Introductionmentioning

confidence: 99%