The First and Second Law Analyses of Thermodynamics of Potato Slices Drying Process
DOI:
https://doi.org/10.13052/dgaej2156-3306.3241Keywords:
solar collector, solar dryer, energetic efficiency, exergetic ef- ficiency, exergy lossAbstract
The objective of the work being presented is to investigate the
thermal performance of indirect, multi-tray solar drying system. Ex -
pressions for exergy in, exergy out and exergy loss for flat plate solar
collector, drying chamber and trays kept in drying chamber were writ -
ten under steady state conditions. Experiments were performed for 6
to 8 hours on two days namely 14/03/2014 and 24/03/2014 and the
observations taken on 24/03/14 has been analyzed using Energetic and
Exegetic approach. The value of first law efficiency for flat plate solar
collector and solar dryer varied between 10% to 30.49% and 4.009% to
9.45% respectively. Second law efficiency of solar collector and solar
dryer have been found varying from 0.7126% to 1.829%.and 49.85% to
67.75% respectively. The Exergetic efficiency for tray 1, tray 2 and tray
3 has been computed and these values varied from 90.43% to 93.412%,
72.684% to 92.352% and 78.179% to 94.61% for each trays respectively.
Considering heavy energy and exergy losses from flat plate solar collec -
tor and drying chamber, the results of first Law and second Law efficien -
cies are in fair agreement with each other.
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