A novel atmospheric freeze dryer using simultaneous application of subzero and hot air streams using a vortex chiller

Rahman, S. M. A.; Saidur, R.

doi:10.1080/07373937.2015.1118638

Cited by 11 publications

(2 citation statements)

References 24 publications

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“…Modified atmospheres are the subject of recent studies, including the freeze-drying of foods (Duan et al, 2016;Cumhur et al, 2016;Rahman & Saidur, 2016), whose results highlight the high cost of this process as a factor preventing its diffusion, and the use of dehydrated air in convection drying (Krzyzanowski et al, 2006a;Krzyzanowski et al, 2006b;Levien et al, 2008), which showed viability in the drying of peanuts and soybeans.…”

Section: Introductionmentioning

confidence: 99%

Coffee Dryer With Dehydrated Air: A Technical and Economic Viability Analysis

et al. 2022

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The defects that drying in concrete yards impose on coffee beans and the search for gourmet coffee production have prompted the emergence of new drying technologies. This work verified the technical and economic feasibility of drying coffee with dehumidified air with a refrigerating capacity of 422,908.7 J s -1 , compatible with static capacity dryers equal to 75 m 3 . Considering the sale price of coffee, the cost of electric energy acquisition, the monthly interest rate and maintenance time, expenses that are equivalent to the depreciation of the concrete yard, a central compound rotational design was considered with 28 tests for the feasibility analysis, including the internal rate of return, net present value and the return on investment. The results showed that in the electric drying units, the dried coffee presents fewer broken and defective beans and has higher retention in a N o . 17 sieve. With a higher beverage quality and a price 12.11% higher, drying with dehydrated air showed a PBD of 2.27 years and a return of US$ 2.49 million. The optimisation results were 98.98% desirable. It was concluded that it is economically feasible to dry coffee with dehydrated air and without using a concrete yard.

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Section: Introductionmentioning

confidence: 99%

Coffee Dryer With Dehydrated Air: A Technical and Economic Viability Analysis

et al. 2022

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“…In this paper its present a static dryer working with dehydrated air that can be eliminate the concrete bases and increases the quality of the coffee. Modified atmospheres are the subject of recent studies, including the freeze drying é liofilização (igual cafe soluvel) talvez drying in low temperatures of foods [3,6,7], whose results highlight the high cost of this process as a factor preventing its diffusion, and the use of dehydrated air in convection drying [8][9][10][11] which showed viability in the drying of peanuts and soybeans. Now this technology has been tested in coffee drying.…”

Section: Introductionmentioning

confidence: 99%

Coffee Dryer with Dehydrated Air

Slabe-Erker

2021

ARTOAJ

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Coffee is one of the most consumed beverages in the world, it has a high added value, and the manufacturing process must be taken care of. New coffee post-harvest technologies dispense concrete base systems and reduce defects of traditional drying. This study analyzed the effects of new drying units with static dryers that work with dehydrated air to produce gourmet coffees. The results showed that an air dehydrator can dry coffee pods with an initial moisture content of 52% to 10% in just 3.2 days. The conclusion was that the dried coffee fruits in the concrete bases lose more quality than the dried coffee in new drying units.

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Advancements in atmospheric freeze-drying: Innovations, technology integration, quality and sustainability implications for food preservation

Naliyadhara,

Trujillo

2025

Journal of Food Engineering

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A novel atmospheric freeze dryer using simultaneous application of subzero and hot air streams using a vortex chiller

Cited by 11 publications

References 24 publications

Coffee Dryer With Dehydrated Air: A Technical and Economic Viability Analysis

Coffee Dryer With Dehydrated Air: A Technical and Economic Viability Analysis

Coffee Dryer with Dehydrated Air

Advancements in atmospheric freeze-drying: Innovations, technology integration, quality and sustainability implications for food preservation

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