Thermal performance study of a multi-pass solar air heating collector system for drying of Roselle (Hibiscus sabdariffa)

M. W. Kareem, Khairul Habib, Mohd Hafidz Ruslan, Bidyut Baran Saha

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

This article presents a study on the performance of a forced convective multi-pass solar air heating collector (MPSAHC) system assisted with granite as a sensible energy storing matrix. Experimental drying of Roselle was carried out in August 2015 at Solar Energy Research Site of Universiti Teknologi PETRONAS, Malaysia (4.385693° N and 100.979203 S). The present investigation was conducted under the daily average relative humidity, solar irradiance, ambient temperature and wind speed of 64.5%, 635.49 Wm−2, 32.24 °C, and 0.81 ms−1, respectively. An average drying rate of 33.57 g (kg m2 h)−1 was achieved while the system optical efficiency, collector efficiency, drying efficiency and moisture pickup efficiency of 70.53%, 64.08%, 36.22% and 66.95% were obtained, respectively. MPSAHC dryer was 21 h faster with fair color retention when compared to open sun drying approach (OSDA) that was conducted together under the same weather condition. Techno economic analysis reflected a payback period of 2.14 years. However, drying efficiency could be improved if the inlet air humidity can be controlled to favor drying operation.

Original languageEnglish
Pages (from-to)281-292
Number of pages12
JournalRenewable Energy
Volume113
DOIs
Publication statusPublished - 1 Dec 2017

Fingerprint

Drying
Heating
Air
Atmospheric humidity
Collector efficiency
Driers (materials)
Pickups
Air intakes
Granite
Economic analysis
Optical systems
Sun
Solar energy
Hot Temperature
Moisture
Color
Temperature

Keywords

  • Drying
  • Medicinal herb
  • Multi-pass collector
  • Payback period
  • Performance
  • Roselle

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

Cite this

Thermal performance study of a multi-pass solar air heating collector system for drying of Roselle (Hibiscus sabdariffa). / Kareem, M. W.; Habib, Khairul; Ruslan, Mohd Hafidz; Saha, Bidyut Baran.

In: Renewable Energy, Vol. 113, 01.12.2017, p. 281-292.

Research output: Contribution to journalArticle

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