Energy and exergy analyses of solar-assisted fluidized bed drying integrated with biomass furnace

Yahya, Muhammad; Fudholi, Ahmad; Sopian, Kamaruzzaman

doi:10.1016/j.renene.2016.12.049

Cited by 108 publications

(41 citation statements)

References 37 publications

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“…Table 2 shows the uncertainties of evaluation of the parameters used in this study. The uncertainties measurement from Moffat 28 and Yahya et al 29 have been adopted in this work. For x n number of measurements made, each has a measurement tolerance of σ n , and the uncertainty of the measurement parameters, U R , can be calculated using the following formula:…”

Section: Uncertainty Analysismentioning

confidence: 99%

Experimental study on performance of square tube absorber with phase change material

et al. 2019

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The intermittent nature of solar radiation has decreased the performance efficiency of solar heaters. Integrating the solar heater with thermal energy storage component could increase its performance effectively. In this article, an investigation on the effect of phase change material (PCM) as the thermal energy storage component on the performance of square aluminum tube was carried out experimentally. In the first phase, the temperature behavior of square aluminum tube with two types of PCM, namely, generic plant-based PCM (A2) and paraffin wax (A3), was compared with square aluminum tube without PCM (A1). In the second phase, the performance of square aluminum tube was investigated with different paraffin wax masses of 38 g (B1), 48 g (B2), and 58 g (B3). Based on the result, the A3 tube configuration performed better than A1 and A2 tube configurations with higher heat gain rate (0.08°C/s) and lower heat discharge rate (−0.04°C/s). The B2 tube configuration was found to have maximum heat gain of 3.73 kJ with higher heat discharge rate as compared with other square tube configurations. The average temperature difference between internal and external surface tube of B2 was lower (4.3°C) leading to higher average temperature difference at ambient temperature of 25.3°C. Instantaneous efficiency of the tube B2 is higher than the B1 and B3 tube configurations by 16% and 26%, respectively. The result suggests that the insertion of paraffin wax inside the square absorber tube improves the temperature response of the absorber in the situation of intermittent solar radiation. KEYWORDS cross-matrix absorber (CMA), phase change material (PCM), solar energy, thermal energy storage

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Section: Uncertainty Analysismentioning

confidence: 99%

Experimental study on performance of square tube absorber with phase change material

et al. 2019

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“…Specific energy consumption (SEC) is the measure of the energy used to remove 1 kg of water in the drying process. The specific energy consumption of the solar drying system was calculated using the following equations [23]:…”

Section: Energy Analysismentioning

confidence: 99%

Performance analysis of solar drying system using double pass solar air collector with finned absorber for drying copra

Yahya¹

2018

ces

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A solar drying system using double-pass solar air collector with finned absorber was designed, fabricated, and evaluated for drying copra (coconut meat). The coconut meats were dried to moisture content of 0.120 dry basis (10.73 % wet basis) from 1.113 dry basis (52.68% wet basis) during 23 hours, with an air mass flow rate of 0.083 kgs-1 , whereas, the open sun drying during 67 hours. The drying rate was found between 0.067kg/h and 0.72 kg/h, and 0.002kg/h and 0.50 kg/h, with average values of 0.191kg/h and 0.055kg/h for solar drying system and open sun drying, respectively. The minimum, maximum, and average of the efficiency of solar air collector were found of about 28.37% and 81.15%, and 58.33%, respectively. The values of the specific moisture extraction rate (SMER) and the specific energy consumption (SEC) were calculated between 0.093 kg/kWh and 0.845 kg/kWh, and 1.184 kWh/kg and 10.779 kWh/kg, respectively. The efficiency of solar drying system and the energy utilization ratio were calculated between 6.19 % and 56.34 %, and 5.61% and 45.0 %, with average values of 16.64 % and 17.61%, respectively. The average values of the improvement potential rate and exergy efficiency of solar drying system were estimated of about 87.98 J/s and 39.47%, respectively.

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“…This technology is also used in other stages of the biomass conversion process. For instance, in drying, in which occurs release of water and extractives of low molecular weight [26][27][28]. And also in the torrefaction as pretreatment [29][30][31][32][33], which can be considered a milder pyrolysis, alters the structure of the particles, releases oxygen compounds and makes a suitable feedstock for the decomposition reaction.…”

Section: Biomass Energy Conversion Technologiesmentioning

confidence: 99%

Experimental Study of Fluid Dynamic Behavior of Biomass Particles in Fluidized Beds: A Review

Tannous

Mitri

Mizonov³

2018

IVUZKKT

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Decease of natural resources and increase of price of fossil fuels at growing energy consumption, toughening of ecological standards and necessity of the increase of the level of energetics diversification motivates mankind to more wide usage of renewable energy resources including the solid fuel of biological origin. The potential of biofuel usage is rather considerable because the energy equivalent of the biomass harvest on the land exceeds the worldwide energy consumption several times as much. The biomass application as a renewable fuel is already a reality worldwide with the development of policies and technologies that turn viable the transformation of biomass into energy. The aims of this work is to present a literature experimental review on the studies concerning to the use of fluidized beds taking into account their design and scale-up. Initially, the usual solid particle terminology and some important biomass properties are presented. A brief description of conversion technologies and the fluidization phenomena are introduced, followed by an explanation of the different experimental techniques. The characteristic velocities (initial, apparent, of segregation, and complete) are discussed based on different biomass properties, as well as a number of empirical correlations for these velocities are described. Finally, some considerations are made about characteristic bed porosities (apparent and complete) and bed expansion. Based on the literature analysis, an improvement has been done on the understanding of the biomass fluidization phenomena, however, further research is needed to comprehend the effect of biomass characteristics on the bed operational parameters, besides more accurate and general correlations must be developed to improve these technologies. For citation: Tannous K., De Mitri A.G., Mizonov V. Experimental study of fluid dynamic behavior of biomassparticles in fluidized beds: a review. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 9-10. P. 4-14

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Energy and exergy analyses of solar-assisted fluidized bed drying integrated with biomass furnace

Cited by 108 publications

References 37 publications

Experimental study on performance of square tube absorber with phase change material

Experimental study on performance of square tube absorber with phase change material

Performance analysis of solar drying system using double pass solar air collector with finned absorber for drying copra

Experimental Study of Fluid Dynamic Behavior of Biomass Particles in Fluidized Beds: A Review

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