Assessment of a solar‐assisted infrared timber drying system

Aktaş, Mustafa; Ceylan, İlhan; Ergün, Alper; Gürel, Ali Etem; Atar, Musa

doi:10.1002/ep.12643

Cited by 11 publications

(13 citation statements)

References 16 publications

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“…Similar result was obtained by Doymaz, Karasu, and Baslar (), who found that phenolics were degraded during infrared heating of jujube fruit at 88 W infrared power. This result occurred because infrared treatment could heat the material to a very high temperature (Aktaş et al, ). It was also found that the UN‐treated sample presented the lowest phenolic content of 38.16 ± 1.44 mg GA/g d.b..…”

Section: Resultsmentioning

confidence: 99%

“…However, IB is only applicable to thin materials such as petals because the very limited penetration depth (Ginzburg, ; Nindo, Kudo, & Bekki, ). The biggest disadvantage of infrared heating is the uncontrollable rise of the temperature up to a extremely high value, which leads to an adverse effect on product quality (Aktaş, Ceylan, Ergün, Gürel, & Atar, ). To solve this problem, intermittent infrared heating achieved by keeping product temperature constant through turning the energy supply on and off, was proposed in previous studies (Chua & Chou, ; Sandu, ).…”

Section: Introductionmentioning

confidence: 99%

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Effects of combined infrared and steam blanching on enzyme inactivation and product quality ofChrysanthemum indicumL. flower

Wang

et al. 2019

J Food Process Preserv

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The effects of combined infrared and steam blanching (ISB), steam blanching (SB) and infrared blanching (IB) on enzyme inactivation (peroxidase, POD, and polyphenol oxidase, PPO), characteristic bioactive components content (phenolics, carotenoids and flavonoids), 5‐hydroxymethylfurfural (5‐HMF), micromorphology and color of Chrysanthemum indicum L. flower were comparatively studied. It was shown that ISB and SB treatments allowed a stable surface temperature at approximately 99°C, while IB caused the temperature rose up to a high value of 129.2°C. ISB treatment enhanced POD and PPO inactivation, and resulted in highest characteristic components, color, and micromorphology retention, as well as the lowest 5‐HMF content. The results demonstrated that ISB can be an alternative to conventional IB and SB for the inactivation of POD and PPO in fresh plants with the added values of higher retention of bioactive compounds, better external appearance, and lower evolution of maillard reaction. Practical applications Chrysanthemum indicum L. flower has a bright yellow color and various pharmacological active compounds. Because of the short blooming period and perishable characteristic, fresh Chrysanthemum indicum L. flower must be dried to extend its shelf‐life for off‐season use. Blanching is an essential step before drying of agricultural products to inactivate enzymes that cause brown discoloration and loss of bioactive components. However, conventional blanching methods are time‐consuming. Therefore, a method of combined infrared and steam blanching was proposed in this paper. The results can serve as a basis to design ISB treatment before drying of fruit and vegetables to save blanching time, control enzyme browning, and non‐enzyme browning and improve product quality.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of combined infrared and steam blanching on enzyme inactivation and product quality ofChrysanthemum indicumL. flower

Wang

et al. 2019

J Food Process Preserv

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“…The best result in terms of drying chamber temperature was found with gravel floor having black paint. Convective‐infrared drying characteristics of timber has been done by Mustafa et al 5 Shiva et al 6 discussed about different solar PV technologies, which decrease fuel dependency. It was also concluded that developments in agricultural techniques with PV would be greatly advantageous.…”

Section: Introductionmentioning

confidence: 99%

Environmental and economic sustainability of PVT drying system: A heat transfer approach

Tiwari

Sahdev

Kumar

et al. 2020

Env Prog and Sustain Energy

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Present communication is an attempt to explore the best PV technology suitable for PVT solar drying system through environmental and economic feasibility. Experimental setup for one of the PV technology (c‐Si) has been taken for experimental validation with theoretical model. Further, the environmental feasibility and environ economic evaluation for drying system having roof with various PV namely, c‐Si, p‐Si or m‐Si, a‐Si, CdTe, and CIGS have been evaluated through energy matrices (EPBT, EPF, and LCCE), CO2 emission, net CO2 mitigation and carbon credit earned which is based on energy and exergy output of the system on yearly basis. The economic analysis has been carried out with experimental data taken on c‐Si PVT drying system by considering grapes as a crop. Cogeneration efficiency has been calculated for different PV technologies and found to be highest for c‐Si PV technology that is, 61.71%, 77.98%, and 12.25% based on energy (electrical and thermal) gain, equivalent (overall) energy gain, and exergy gain, respectively. LCCE on energy basis reveals that for the five‐year system life, c‐Si and CIGS have equal efficiency but after five years, c‐Si is best. Cogeneration efficiency of system on the basis of energy (electrical + thermal) gain, equivalent (overall) energy gain and overall exergy gain found to be maximum with c‐Si PV technology that is, 61.71%, 77.98%, and 12.25%, respectively.

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“…From the survey of the literature, it can be resolved that a basic technique for rating the thermal mechanism of different type of solar dryers has not been developed because of the complexity of the solar dryer system. It includes gradual heat and mass transfer circumstance …”

Section: Introductionmentioning

confidence: 99%

Thermal analysis of north wall insulated greenhouse dryer at different bed conditions operating under natural convection mode

Ahmad

Prakash

2019

Env Prog and Sustain Energy

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An experimental investigation has been carried out on the modified greenhouse dryer with insulated north wall operating under natural convection mode of heat transfer for different floor conditions, namely ground floor, concrete floor, gravel floor, and black painted gravel floor. The terms like coefficient of diffusivity, coefficient of performance, overall heat transfer coefficient, heat loss factor, and heat utilization factor has been calculated for different floor conditions. The maximum difference between room temperature and ambient temperature was found to be 32.4°C at 13 O'clock for black painted gravel floor, followed by gravel floor, concrete floor, and ground floor which are 27, 14.1, and 11.5°C, respectively. It has been observed that the rise in the percentage of maximum room temperature in comparison to maximum ambient temperature for black painted gravel floor, gravel floor, concrete floor, and the ground floor was 50.31, 46.15, 30.1, and 26.6%, respectively at 13 O'clock. It has been found that the maximum temperature absorbed by black painted gravel bed. Hence, this type of floor condition is highly recommended for drying of low and medium moisture content type vegetables and fruits. The thermal parameters of the result obtain from the present setup was compared with the published literature, and it was found that all parameters show the similar trends; however, the present setup shows the superior performance compared to other research work.

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Assessment of a solar‐assisted infrared timber drying system

Cited by 11 publications

References 16 publications

Effects of combined infrared and steam blanching on enzyme inactivation and product quality ofChrysanthemum indicumL. flower

Effects of combined infrared and steam blanching on enzyme inactivation and product quality ofChrysanthemum indicumL. flower

Environmental and economic sustainability of PVT drying system: A heat transfer approach

Thermal analysis of north wall insulated greenhouse dryer at different bed conditions operating under natural convection mode

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