Comparative evaluation of the performance of an improved solar-biomass hybrid dryer

Okoroigwe, Edmund C.; Ndu, Evidence C.; Okoroigwe, Florence C.

doi:10.17159/2413-3051/2016/v26i4a2092

Cited by 23 publications

(12 citation statements)

References 18 publications

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“…Madhlopa and Ngwalo (2007) developed an indirect type natural convection solar dryer integrated with thermal storage and biomass-backup heater for drying pineapple. Okoroigwe et al (2015) re-designed a solar dryer with frontal pass solar collector integrated with biomass back-up heater by incorporating a back pass solar collector instead of frontal pass solar collector. Barki et al (2012) presented performance evaluation of an efficient solar dryer with a backup incinerator for grated Cassava under Makurdi humid climate.…”

Section: Introductionmentioning

confidence: 99%

Exergetic sustainability and economic analysis of hybrid solar-biomass dryer integrated with copper tubing as heat exchanger

Ndukwu

Simo-Tagne²,

Abam

et al. 2020

Heliyon

101

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The aim of this study is to present a new hybrid solar-biomass dryer and carry out thermal analysis based on energy and exergo-sustainability analysis considering all the available exergy stream of solar radiation, air stream through the collector, and exergy of the moisture in the product. The research also presented the environmental impact and economic analysis of using the dryer. Performance evaluations show that at collector efficiency of 20.81%-21.89 %, the developed solar dryers can save between 10 -21hrs of drying time in drying 5 mm thick plantain slices to 15 % moisture content from initial moisture content of 66 % w.b when compared to drying under the open sun. The improvement potential ranged from 0.036 to 20.6W while the waste exergy ratios and sustainability index ranged from 0.38 -0.55 and 2.3-6.11 respectively. Application of the solar dryers can save between 44 -3074 of CO 2 entering the atmosphere per year while 2.94 to 205.43$ could also be saved at 10-100% rate of usage when compared to diesel fired dryer. The total energy consumption for drying ranges between 5.52 and 35.47 MJ, while the specific energy consumption ranged from 4.3 to 26.2 kWh/kg. The exergy efficiency ranges from 5.6 -95.13 % during the sunshine hours.

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Section: Introductionmentioning

confidence: 99%

Exergetic sustainability and economic analysis of hybrid solar-biomass dryer integrated with copper tubing as heat exchanger

Ndukwu

Simo-Tagne²,

Abam

et al. 2020

Heliyon

101

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“…Operating with the drying air temperature of 49.8(±2.2)°C and relative humidity of 22(±4)%, and loaded with 100 kg wet fish Bleberan measured about 13.41 (±0.25) cm long, this dryer reduced the moisture content of fish from 81.04% to 20% in 13.4 hours, in contrast working with the drying air temperature ranged from 32. The design of the solar-biomass hybrid dryer introduced here was also unique compared to those reported by other researchers [16], [21], [17], [18]. The uniqueness of this dryer relied mainly on the shape of the structure as depicted in Figure 1, the design of the heat exchanger as described in detail above, and free from electricity dependence which makes it possible for application in remote areas.…”

Section: Resultsmentioning

confidence: 87%

“…To solve this problem, the hybrid solar dryers have been developed. These dryers operate with solar energy and other energies, such as electric energy [13], [14], [15]) and biomass [16], [17], [18], [19], [20] as energy substitution or a combination. The substitution energy is usually supplied from an electric heater or a heat exchanger that transfers heat from combustion stove.…”

Section: Introductionmentioning

confidence: 99%

Performative Improvement of Solar-Biomass Hybrid Dryer for Fish Drying

Yuwana¹,

Bosman²

2017

International Journal on Advanced Science, Engineering and Information Technology

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The solar-biomass hybrid dryer had been developed, and recently its design was improved. The dryer was basically UV12% plastic house, equipped with a drying chamber with the trays inside, two heat collector, a furnace embedded in a heat exchanger and a chimney. The objective of this study was to investigate the performance of the dryer after the design was improved by testing it for fish drying with different modes of energy supply i.e: solar energy (SE), biomass energy (BE), solar energy followed by biomass energy (SEBE), and simultaneous solar energy and biomass energy (SEBES). Coconut shell was used as the biomass energy source, and "Bleberan"fish (Pepetak Leiognatus spp.) was employed as the experimental commodity. SE mode generated the average drying air temperature 10.6 o C higher than that of ambient air and the average drying air relative humidity 21.9% lower than that of ambient air, and completed the drying process in 16.6 hours compared to 23.3 hours needed to finish the drying process for the sun drying. Operating with 3 kg fuel first supply and 1.5 kg fuel subsequent supplies per 20 minutes, BE mode produced the average drying air temperature 28.2 o C higher than that of ambient air and the average drying air relative humidity 44.7% lower than that of ambient air, and the drying process was completed in 8.6 hours with the fuel consumption of 0.375 kg biomass per kg wet fish. In SEBE mode with the same fuel supplies as BE mode, the average drying air temperature was 27,7 o C higher than that of ambient air, and the average drying air relative humidity was 45% lower than that of ambient air, and the drying process was completed in 13.4 hours with the fuel consumption of 0.19 kg biomass per kg wet fish. For SEBES mode with 3 kg fuel first supply and 1 kg fuel subsequent supplies, the average drying air temperature was 25.6 o C higher than that of ambient air, the average drying air relative humidity was 43.9% lower than that of ambient air, and the dryer finished the drying process in 9.1 hours and consumed 0.29 kg biomass per kg wet fish. The uniqueness of the dryer was manifested by its shape, the heat exchanger and electricity free.

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“…The study also showed that, solar drying of vegetables led to retaining of more nutrients and is relatively hygienic with reduced microbial. Okoroigwe et al (2015) in research study on comparative evaluation of the performance of an improved solar-biomass hybrid dryer, it was found that, a redesigned biomass solar dryer with a back pass solar collector and heat exchanger showed a significant improvement in agricultural drying. The efficiency of the solar dryer based on solar, biomass and a combined solar biomass showed a significant increase in the drying of fresh okra, fresh groundnut and fresh cassava chips when a test was carried out.…”

Section: Solar Drying Research In Nigeriamentioning

confidence: 99%

Review on Solar Drying in Nigeria

OKONKWO

Ertekin²

2022

Turkish Journal of Agricultural Engineering Research

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Nigeria, as one of the countries in the African continent has its challenges regarding to agricultural crops cultivation and its preservation methods. Traditional methods of preserving crops are commonly adopted by the local populace over solar dryer appliances. The reason for these includes being cheaper method, does not require much technical know-how, is easily learnable, the area for drying the agricultural crop produce being unlimited etc as when compared to solar dryers that needs materials to be fabricated, required little or medium knowledge of technical know-how, financial requirement for its fabrication which could range from few dollars to thousands of dollars. Solar dryer working principles, components, various classifications, and its mode of air movement and mode of heat transfer were discussed on this article. The article also reviewed some of the experimental researches on solar drying in Nigeria carried out by various scholars. The review of the published works on solar drying of various crops under different drying techniques were carefully studied. The results showed that, significant works on solar drying in Nigeria have been carried out even though its potential is greatly under-utilized due to various factors militating against it.

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Comparative evaluation of the performance of an improved solar-biomass hybrid dryer

Abstract: Abstract

Cited by 23 publications

References 18 publications

Exergetic sustainability and economic analysis of hybrid solar-biomass dryer integrated with copper tubing as heat exchanger

Exergetic sustainability and economic analysis of hybrid solar-biomass dryer integrated with copper tubing as heat exchanger

Performative Improvement of Solar-Biomass Hybrid Dryer for Fish Drying

Review on Solar Drying in Nigeria

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