Premium
Investigation of mass transfer, thermodynamics, and greenhouse gases properties in pennyroyal drying
Author(s) -
Kaveh Mohammad,
Karami Hamed,
Jahanbakhshi Ahmad
Publication year - 2020
Publication title -
journal of food process engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 45
eISSN - 1745-4530
pISSN - 0145-8876
DOI - 10.1111/jfpe.13446
Subject(s) - exergy , exergy efficiency , environmental science , thermal diffusivity , process engineering , work (physics) , moisture , greenhouse gas , energy consumption , mass transfer , pulp and paper industry , efficient energy use , greenhouse , chemistry , thermodynamics , waste management , environmental engineering , chromatography , horticulture , physics , engineering , ecology , organic chemistry , biology , electrical engineering
Abstract In this research, kinetic analysis, energy, exergy, and greenhouse gases of a hybrid laboratory dryer (solar‐hot air) are presented for pennyroyal. Drying was performed at input temperatures of 50, 60, and 70°C and air velocities of 0.6, 1.2, and 1.8 m/s. The effect of drying variables on moisture ratio, effective moisture diffusivity, specific energy consumption, energy utilization ratio, energy utilization, exergy efficiency, and exergy loss was investigated. The highest amounts of effective moisture diffusivity and specific energy consumption were 2.30 × 10 −10 m 2 /s and 48.60 kWh/kg, respectively. Energy utilization and energy utilization ratio varied from 0.0064 to 0.0826 kJ/s and from 0.056 to 0.957, respectively. Exergy loss and exergy efficiency varied between 0.0037 to 0.0510 kJ/s and 0.2428 to 0.8731, respectively. In addition, by increasing the temperature and intake air velocity, drying rate increased and the emissions of greenhouse gases (CO 2 , SO 2 , and NO X ) were reduced. Practical Applications Modeling of the drying process is an important aspect of drying technology, especially in drying for industrial purposes. The aim of modeling is to select the most suitable drying method and the best operating conditions for obtaining the product. Some of the key issues in drying have been to reduce the price of the energy resources used, increase the drying efficiency, and improve the quality of the dried products. The concept of exergy is defined by the concept of reversible work. The concept of reversibility depends on energy balance and mass regardless of energy quality (exergy loss).