Open AccessENTROPY GENERATION CALCULATIONS DURING PARCHMENT COFFEE DEHYDRATION PROCESSES FOR A TRADITIONAL OPEN ROTARY DRUM DYER AND HARC2 S CONFIGURATIONS
Author(s) -
F Rodriguez-Robles
Publication year - 2021
Publication title -
international journal of engineering applied science and technology
Language(s) - English
Resource type - Journals
ISSN - 2455-2143
DOI - 10.33564/ijeast.2021.v06i02.005
Subject(s) - drum , dehydration , entropy (arrow of time) , thermodynamics , entropy production , chemistry , physics , mechanical engineering , engineering , biochemistry
Entropy generation during parchment coffeedehydration processes was calculated for two specificthermodynamic cycles, namely, open rotary drum dyer anda HARC2S configuration. It was observed that open rotarydrum dyer entropy generation was very high and chaotic ascompared to the HARC2S configuration thermodynamiccycle. The HARC2S exhibited a well behaved quasi steadystate linear behavior. A figure-of-merit, Ns, was used todirectly compare the entropy generation of the open rotarydrum dyer to that of HARC2S. It was observed that for theentire dehydration processes the Ns ranged from a minimalof 0.1678 to a maximum of 5.4407 with an average of 4.4051,clearly indicating that the entropy generation of the openrotary drum dyer was always higher. Based on these resultsit is observed that the entropy generation of the HARC2Sconfiguration is much lower and thus provides a higherquality dehydration process by reducing thermodynamiccycle irreversibility. In this study it is observed that thebenefits of using a HARC2S configuration for parchmentcoffee dehydration not only provides a highly energyefficient thermodynamic cycle but also provides a higherheating quality as compared to the traditional open rotarydrum dyer.