Abstract
Heat pump dryers and traditional tray dryers were used in experiments to dry guava slices from an initial moisture content of 84.73% (w.b.) to 18-25% (w.b.) at temperatures of 40 °C, 45 °C, and 50 °C, with an airflow rate of 0.46 m/s. The guava's moisture content decreased exponentially with drying time, and higher temperatures led to faster drying rates. Guava slices are mainly dried during the falling-rate period. Energy consumption was 16%, 21%, and 14% lower in heat pump dryers compared to tray dryers at 40 °C, 45 °C, and 50 °C, respectively. Drying behaviour was best described by the Page model, with a higher R2 value at 50 °C for the heat pump dryer. Heat pump dryers were more effective at lower drying temperatures and humidity levels, offering a faster drying rate and better-quality retention than tray dryers while using less energy. In summary, heat pump dryers are a more efficient option for guava drying because they preserve quality and conserve energy compared to conventional tray dryers.
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Claims 9
Claim · model-written summary
Guava moisture content fell exponentially over drying time.
- Taxon
- guava
Psidium guajavae0 - Outcome
- moisture contente0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The guava's moisture content decreased exponentially with drying time, and higher temperatures led to faster drying rates.”
Claim · model-written summary
Higher temperature increased the drying rate of guava.
- Taxon
- guavaPsidium guajavae0
- Treatment
- higher temperaturese0
- Outcome
- drying ratese0
- Direction
- fastere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The guava's moisture content decreased exponentially with drying time, and higher temperatures led to faster drying rates.”
Claim · model-written summary
Guava slices dried mainly during the falling rate period.
- Taxon
- GuavaPsidium guajavae0
- Organ / stage
- slicese0
- Outcome
- falling-rate periode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Guava slices are mainly dried during the falling-rate period.”
Claim · model-written summary
Heat pump drying consumed 16% less energy than tray drying at 40 °C.
- Taxon
- guavaPsidium guajavat0
- Treatment
- heat pump dryerse0
- Outcome
- Energy consumptione0
- Direction
- lowere0
- Value
- 16%e0
- Qualifier
- 40 °Ce0
- Comparator
- tray dryerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Energy consumption was 16%, 21%, and 14% lower in heat pump dryers compared to tray dryers at 40 °C, 45 °C, and 50 °C, respectively.”
t0“guava”
Claim · model-written summary
Heat pump drying consumed 21% less energy than tray drying at 45 °C.
- Taxon
- guavaPsidium guajavat0
- Treatment
- heat pump dryerse0
- Outcome
- Energy consumptione0
- Direction
- lowere0
- Value
- 21%e0
- Qualifier
- 45 °Ce0
- Comparator
- tray dryerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Energy consumption was 16%, 21%, and 14% lower in heat pump dryers compared to tray dryers at 40 °C, 45 °C, and 50 °C, respectively.”
t0“guava”
Claim · model-written summary
Heat pump drying consumed 14% less energy than tray drying at 50 °C.
- Taxon
- guavaPsidium guajavat0
- Treatment
- heat pump dryerse0
- Outcome
- Energy consumptione0
- Direction
- lowere0
- Value
- 14%e0
- Qualifier
- 50 °Ce0
- Comparator
- tray dryerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Energy consumption was 16%, 21%, and 14% lower in heat pump dryers compared to tray dryers at 40 °C, 45 °C, and 50 °C, respectively.”
t0“guava”
Claim · model-written summary
The Page model best described guava drying, with higher R2 at 50 °C for the heat pump dryer.
- Taxon
- guavaPsidium guajavat0
- Outcome
- Drying behavioure0
- Direction
- highere0
- Qualifier
- 50 °Ce0
- Comparator
- Page modele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drying behaviour was best described by the Page model, with a higher R2 value at 50 °C for the heat pump dryer.”
t0“guava”
Claim · model-written summary
Heat pump dryers gave faster guava drying at lower temperatures and humidity than tray dryers.
- Taxon
- guavaPsidium guajavat0
- Treatment
- Heat pump dryerse0
- Outcome
- drying ratee0
- Direction
- fastere0
- Qualifier
- lower drying temperatures and humidity levelse0
- Comparator
- tray dryerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heat pump dryers were more effective at lower drying temperatures and humidity levels, offering a faster drying rate and better-quality retention than tray dryers while using less energy.”
t0“guava”
Claim · model-written summary
Heat pump dryers retained guava quality better than tray dryers.
- Taxon
- guavaPsidium guajavat0
- Treatment
- Heat pump dryerse0
- Outcome
- quality retentione0
- Direction
- bettere0
- Comparator
- tray dryerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heat pump dryers were more effective at lower drying temperatures and humidity levels, offering a faster drying rate and better-quality retention than tray dryers while using less energy.”
t0“guava”
The same questions in other papers
heat · quality: general · Psidium guajava (guava)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
heat · quality: postharvest · Psidium guajava (guava)Positive and negative results
4 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
2 papers more in this group
See all 6 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.