Performance evaluation of solar-assisted heat pump dryer integrated with thermal energy storage for drying Moringa Oleifera leaves

Loemba, Aldé B. T.; Kichonge, Baraka; Selemani, Juma Rajabu; Kivevele, Thomas

doi:10.1557/s43580-023-00580-8

MRS Advances

2023

DOI: 10.1557/s43580-023-00580-8

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Performance evaluation of solar-assisted heat pump dryer integrated with thermal energy storage for drying Moringa Oleifera leaves

Aldé B. T. Loemba

Baraka Kichonge

Juma Rajabu Selemani

et al.

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2024

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Cited by 1 publication

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Thermal Performance and Technoeconomic Analysis of Solar-Assisted Heat Pump Dryer Integrated with Energy Storage Materials for Drying Cavendish Banana (Musa acuminata)

Loemba,

Kichonge,

Kivevele

2024

Journal of Food Processing and Preservation

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This study examines a novel solar-assisted heat pump dryer integrated with a thermal energy storage system using soapstone as storage material. The dryer is investigated through experimental analysis across three operating modes: mode 1 with thermal energy storage during daytime, mode 2 without thermal energy storage during nighttime, and mode 3 without thermal energy storage during daytime. Experiments were carried out to investigate the drying of 500 g of Cavendish banana. Thermal performance, as well as economic, and nutritional content were examined. Three replicates of the experiment yielded consistent results, showing a significant reduction in the moisture content of the initial sample from 74.4% to 9.6% after undergoing distinct drying durations. Mode 1 achieved this reduction in 270 minutes, mode 2 in 390 minutes, and mode 3 in 360 minutes. The average specific moisture extraction rates for modes 1, 2, and 3 were 0.13, 0.11, and 0.12 kg/kWh, respectively. Simultaneously, the drying rate ranged from 0.16 to 0.24% per minute. The drying efficiency varied among the tested modes, with mode 1 achieving the highest efficiency at 23.23%. In terms of coefficient of performance, mode 1, mode 2, and mode 3 exhibited values of 3.69, 2.57, and 2.54, respectively. The economic analysis conducted specifically for mode 1 revealed a payback period of 1.5 years, indicating the time required to recover the initial investment. Additionally, the results indicated that the dried Cavendish banana had significantly higher concentrations of proximate parameters and minerals compared to the fresh Cavendish banana, as evidenced by a p value less than 0.05.

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Thermal Performance and Technoeconomic Analysis of Solar-Assisted Heat Pump Dryer Integrated with Energy Storage Materials for Drying Cavendish Banana (Musa acuminata)

Loemba,

Kichonge,

Kivevele

2024

Journal of Food Processing and Preservation

Self Cite

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show abstract

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Performance evaluation of solar-assisted heat pump dryer integrated with thermal energy storage for drying Moringa Oleifera leaves

Cited by 1 publication

References 17 publications

Thermal Performance and Technoeconomic Analysis of Solar-Assisted Heat Pump Dryer Integrated with Energy Storage Materials for Drying Cavendish Banana (Musa acuminata)

Thermal Performance and Technoeconomic Analysis of Solar-Assisted Heat Pump Dryer Integrated with Energy Storage Materials for Drying Cavendish Banana (Musa acuminata)

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