Efficiency of a hybrid solar–gas dryer

López‐Vidaña, Erick C.; Méndez-Lagunas, Lilia Leticia; Rodríguez‐Ramírez, Juan

doi:10.1016/j.solener.2013.01.027

Cited by 66 publications

(24 citation statements)

References 15 publications

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“…In most of the recently-proposed methodologies for characterizing the performance of solar dryers (Altobelli et al, 2014;López-Vidaña et al, 2013;Singh and Kumar, 2012), parameters, such as the pick-up efficiency (g p ), the drying efficiency (g d ), the Nomenclature d discount rate (%) LC life-cycle DPBP discounted payback period (years) F v future value of energy FCV future consumption value (J) FPV future production value (J) P v present value of energy (J) NPVEER net present value to embodied energy ratio IRR internal rate of return (%) MARR minimum attractive rate of return (%) MC moisture content (kg kg À1 ) n time into the kiln service life E modulus of elasticity (Pa) NPV net present value (J) Q radiation energy flow rate (W) A surface area (m 2 ) I T total solar radiation (W m À2 ) G cb beam radiation R b ratio of the beam radiation on a tilted surface to that on a horizontal surface (Singh and Kumar, 2012). In Altobelli et al (2014), a model of free water evaporation in a forced solar dryer, where the total solar radiation and the saturation deficit of ambient air were considered as the driving force for drying processes, was described.…”

Section: State Of the Artmentioning

confidence: 99%

Development of a sustainable methodology for life-cycle performance evaluation of solar dryers

Hasan

Langrish

2016

Solar Energy

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Section: State Of the Artmentioning

confidence: 99%

Development of a sustainable methodology for life-cycle performance evaluation of solar dryers

Hasan

Langrish

2016

Solar Energy

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“…The second energy source leads also to extend the drying time and to control the drying parameters during the dehydration process. Various type of hybrid solar-gas dryers [10,11,12] have been designed and developed for fruits, vegetables and other agriculture product drying either at industrial scale or by small farmers. Unfortunately, most of these hybrid dryers burn the gas in the same place with the products where the dried product adsorbs the flue gases as shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Mathematical modeling of an innovative hybrid solar-gas dryer

Zoukit

Ferouali

Salhi

et al. 2018

Journal of Energy Systems

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This paper is devoted to develop a multivariable model (MM) of an innovative hybrid solar-gas dryer issued from a CFD study. The proposed (MM) was explored to predict the drying chamber temperature in forced convection (0.025kg/s) in two main operating modes (solar mode and gas mode). There is an indirect heating of drying air instead of direct heating inside the drying chamber as it was reported in conventional hybrid solar-gas dryers. CFD technique was used to simulate the temperature and airflow distribution inside the drying chamber. However, CFD simulation requires huge capacity of the processor for calculating and takes significant simulation time. Therefore, the multivariable model was developed to predict the drying temperature instantly with a notable reduction in simulation time. Root Mean Square (RMSE) was used to measure the difference between the predicted values by CFD and (MM) model. It was found that the results shown fairly good agreement with an RMSE lower than 2.35 confirming the pertinence of the proposed model. The developed model led to a quick output parameters estimation related to each climatic condition. Thus, it is very useful for synthesizing a control system of the temperature as well as the optimization of gas consumption.

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“…Solar Dryers are proper systems to solve the food and energy shortages. Common solar dryers have low drying rates; hence they require a large installation area, making them less attractive to be applied in the industry [27][28][29]. Contrary spouted bed dryers and fluidized bed dryers provide high drying rates, so integrating these technologies to solar collectors, to provide the required energy, results in a high drying rate solar dryer [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Transport phenomena study in a solar spouted bed dryer within a draft tube

Esmailie

Ghadamian

Aminy

2017

Env Prog and Sustain Energy

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This research investigated a high drying rate solar dryer with low-intensity energy consumption. In a brief issue, the solar spouted bed dryer was designed, fabricated and tested through this study. To cover this purpose, a 1D dynamic model was developed for this dryer's bed section. The mentioned accurate model is able to predict this type of solar dryer behavior which includes mass, momentum and energy transfer phenomena. The mentioned model solves the governing equations-mass, momentum, and energy balance equations-simultaneously using MATLAB software. By this system test pilot modeling and experiments, Design and manufacture of a high drying rate solar dryer with low energy intensity are achieved. Comparison between the model and experimental results shows that the maximum error percentage related to output profiles were approximately less than 3.6% that consider an appropriate band of errors. Based on experiments, the system is able to eliminate 85,500 mg water from 150 g corn grains during 90 min test interval. The considerable achievement contributed to the energy consumption intensity is equal to 93.3 kJ/g of corn, which can be a valuable energy heat rate.

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Efficiency of a hybrid solar–gas dryer

Cited by 66 publications

References 15 publications

Development of a sustainable methodology for life-cycle performance evaluation of solar dryers

Development of a sustainable methodology for life-cycle performance evaluation of solar dryers

Mathematical modeling of an innovative hybrid solar-gas dryer

Transport phenomena study in a solar spouted bed dryer within a draft tube

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