Combustion characteristics of a low calorific gas burner with ceramic foam enclosed by alumina pellets

Dai, Hao; Dai, Huaming; Zhu, Huiwei; Qian, Zhendong; He, Song; Wang, Zhiqiang

doi:10.1007/s00231-021-03107-9

Cited by 9 publications

(1 citation statement)

References 51 publications

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“…These properties are influenced by the mode of drying, initial moisture content, type of crop, environmental conditions, initial treatment given, etc. [20]. Therefore, a generalized determination of these parameters for all agricultural products is not possible but must instead be product-specific.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Heat Transfer Coefficient, Thermal Effusivity and Mathematical Modelling of Drying Kinetics of a Partitioned Single Pass Low-Cost Solar Drying of Cocoyam Chips with Economic Assessments

et al. 2022

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This study examines the heat and mass transfer coefficient, thermal effusivity, and other thermal properties of solar-dried cocoyam chips, as well as the drying kinetics. The research also assessed the economics of the solar dryer. For these reasons, a solar dryer with a partitioned collector was developed that creates a double airflow travel distance to delay the airflow inside the collector. The partitioning of the collector delays the airflow and helps to create more turbulence for the airflow with increased energy. The solar dryer was locally developed at the Michael Okpara University of Agriculture and tested during the humid crop harvesting period of September for the worst-case scenario. The obtained drying curves and kinetics for cocoyam drying are subjected to the vagaries of weather conditions. The drying rate showed declining sinusoidal characteristics and took about 25 h to attain equilibrium. Analysis of the airflow velocity showed gravitation between laminar and turbulent flow, ranging from 171.69 to 5152.77. Specific heat capacity, thermal conductivity, and effusivity declined with moisture content while the thermal diffusivity increased. However, the values of thermal effusivity ranged from 12.2 to 47.94 W.s1/2.m−2.K−1, which is within the range of values for insulators. The heat and mass transfer coefficient varied as a function of the airflow velocity. Fitting the drying curve into semi-empirical models showed that the two-term model was the best-fitted model for the experimental data from drying cocoyam. Using the solar dryer in Nigeria can save $188.63–$1886.13 in running costs with a payback period of 0.059–0.59 years (21.54–215.35 days) at a rate of 10–100% of usage.

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Section: Introductionmentioning

confidence: 99%