Simulation, design and experimental performance evaluation of an innovative hybrid solar-gas dryer

Zoukit, Ahmed; Ferouali, Hicham El; Salhi, Issam; Doubabi, Saïd; Abdenouri, Naji

doi:10.1016/j.energy.2019.116279

Cited by 29 publications

(10 citation statements)

References 31 publications

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“…Among these various energy sources, solar energy is more attractive due to its sustainability, environment friendly and fossil fuel cost reduction. Although hybrid solar gas dryer (Zoukit, Ferouali, Salhi, Doubabi, & Abdenouri, 2019), hybrid solar LPG dryer (Murali, Amulya, Alfiya, Aniesrani, & Samuel, 2019), hybrid solar‐biomass dryer (Delfiya, Mohapatra, Kotwaliwale, & Mishra, 2018) and heat pump assisted solar dryer (Gan Sh et al, 2017; Kuan et al, 2019) have been investigated recently because of their higher efficiency compared to the conventional solar dryers.…”

Section: Introductionmentioning

confidence: 99%

“…In direct type, the air is warmed in the drying chamber and in indirect type, the air is heated in collector and then delivered to the drying chamber. Modeling and analyzing method: The most common methods in modeling and analyzing the solar dryers include thermodynamic modeling, numerical simulation and experimental measurements. Reviewing literature according to the above categorization is presented in the following and is summarized in Table 1. Zoukit et al (2019) investigated an innovative hybrid solar‐gas dryer through experimental measurements and CFD simulations. This dryer was an indirect forced convection type.…”

Section: Introductionmentioning

confidence: 99%

“…Most of works were modeled the daily performance of a dryer in a fixed geographical area. Very few literatures were considered different climatic condition such as two successive cloudy days with solar irradiation of 256 and 268 W/m 2 (Zoukit et al, 2019) and four different days (clean sky and cloudy) in summer and winter (Kuan et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Reviewing literature according to the above categorization is presented in the following and is summarized in Table 1. Zoukit et al (2019) investigated an innovative hybrid solar-gas dryer through experimental measurements and CFD simulations. This dryer was an indirect forced convection type.…”

Section: Introductionmentioning

confidence: 99%

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Solar dryer performance simulation: Experimental and numerical study

Mehdipour

Ghaffari

2021

J Food Process Engineering

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In this study, effect of solar irradiation and suction head on an indirect cabinet solar dryer performance is investigated experimentally and numerically. In this regard, a specific experimental apparatus consisting a collector, heaters and adjustable chimney is fabricated to measure the air flow velocity and temperature at collector outlet in various irradiance (300, 400, 500, 600, 800, and 1,000 W/m2) and chimney height (1.85, 2.05, 2.25, and 2.55 m). In addition to the above abilities of experimental setup, more accurate thermal and hydraulic results are achieved. The obtained results are useful to the field since there are many defects in available simulations of collector. Some of the defects concerns incomplete prediction of thermal losses to the environment, ignoring secondary flows and vortices formed by velocity increment through the collector, etc. In the present study, computational fluid dynamics (CFD) is used for modeling the drying chamber utilizing the pressure jump method and simulating the mass transfer phenomenon by a heat source. The results for the studied case (grape as to‐be‐dried product) as an example, show that the solar irradiation augmentation leads to the temperature and velocity increment while the suction head increment leads to an increasing‐decreasing behavior for the temperature. It is also demonstrated that by increasing the solar irradiation from 300 to 1,000 W/m2, the thermal efficiency of the collector and drying chamber increase from 42.92% to 64.31% and 10.08% to 15.15% respectively and the drying time of grapes reduces from 216 hr to 143 hr. Practical Applications The present study experimentally and numerically investigates a solar dryer for the specific application of grape drying although it can be applied for drying a wide types of fruits. The experimental part of the accomplished research is similar with solar chimney in a way that the present experimental results can be used for solar chimneys too. Based on the obtained results, the drying time as well as the air flow has been improved by applying the suggested drying method.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Solar dryer performance simulation: Experimental and numerical study

Mehdipour

Ghaffari

2021

J Food Process Engineering

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“…The suitability of the reduction in water content with the product's ability to release water becomes the focus of the investigation in addition to the energy requirements in the drying process. It is because agricultural products that are processed with dryers are easily damaged if not handled properly [10][11][12] and requires a lot of energy [13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Non-invasive moisture content measurement system based on the ESP8266 microcontroller

Sitorus¹,

Novrinaldi²,

Bulan³

2020

Bulletin EEI

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Moisture content in the process of drying is often unknown when carrying out the drying process, especially the fluidized dryer. A lot of experimental designs are needed when observing the drying phenomenon more deeply. It is because to stop and repeat drying process from the beginning again when the sample is taken to test its moisture content needed more experiments. Therefore, this paper presents development of a non-intrusive moisture measurement system prepared for fluidization type dryers. The method used in to conduct this research consists of (i) structural design analysis and (ii) functional (mechanical and electrical systems) and (iii) simple testing of the water content measurement system of constructed material. Test parameters observed include errors in measuring and fluctuating sensor signals against vibration applied to the weighing system. The results showed that non-intrusive moisture content measurement system for fluidized dryers based on the ESP8266 microcontroller had been successfully developed and worked normally. The measurement system has been calibrated with a coefficient of determination (R2) close to one. Measurement error resulting from the effect of vibration on this system shows a very satisfactory value of 6.89%.

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