Effect of drying using solar energy and phase change material on kiwifruit properties

A. Reyes, J. Vásquez, N. Pailahueque, A. Mahn

Research output: Contribution to journalArticle

Abstract

Solar energy has great potential as an alternative energy source, but variations in solar radiation require the use of additional energy sources to maintain a continuous drying process. We developed a process for drying kiwifruit using a solar dryer and an energy accumulation system with paraffin wax as phase change material. The final moisture content, total polyphenols, and antioxidant capacity were evaluated and compared with freeze drying. The analyzed experimental factors were kiwi slice thickness and the use or nonuse of fuzzy logic control systems to regulate the air flow through the devices. Critical moisture content, shrinkage, solar panel, and solar energy accumulator efficiencies were calculated. In addition, five empirical models were fitted to the drying curves. The solar panel showed an efficiency between 56 and 76%. The use of the fuzzy logic control system extended the period of available energy, thus prolonging the use of the solar panel and solar energy accumulator and using only 10% of the stored energy; otherwise, without the control system, 43% of the stored energy was used. The highest drying rates were achieved for kiwifruit slices 4 mm thick, using the solar dryer with the control system. The loss of polyphenols and antioxidant capacity were minimal for kiwifruit slices of thickness 8 mm without the control system. © 2018 Taylor & Francis
LanguageEnglish
Pages1-13
Number of pages13
JournalDrying Technology
DOIs
Publication statusPublished - 2018

Fingerprint

phase change materials
Phase change materials
solar energy
Solar energy
drying
Drying
Control systems
Solar dryers
drying apparatus
antioxidants
Polyphenols
energy sources
Antioxidants
accumulators
Fuzzy logic
moisture content
logic
Moisture
energy
Paraffin waxes

Keywords

  • Antioxidant
  • drying kinetics
  • effective diffusivity
  • energy accumulation
  • kiwifruit
  • phase change material (PCM)
  • polyphenols
  • solar dryer
  • Antioxidants
  • Computer circuits
  • Control systems
  • Fuzzy logic
  • Moisture
  • Moisture determination
  • Phase change materials
  • Solar cell arrays
  • Solar concentrators
  • Solar dryers
  • Solar energy
  • Drying kinetic
  • Effective diffusivities
  • Energy accumulation
  • Kiwifruits
  • Polyphenols
  • Drying

Cite this

Effect of drying using solar energy and phase change material on kiwifruit properties. / Reyes, A.; Vásquez, J.; Pailahueque, N.; Mahn, A.

In: Drying Technology, 2018, p. 1-13.

Research output: Contribution to journalArticle

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