Energy and exergy analyses of sugar production stages

Abstract

SUMMARYThis paper presents the energy and exergy analyses of sugar production stages by using the operational data from Bor Sugar Plant, Turkey. For these purposes, all stages of sugar production, considered as a steady-state open thermodynamic system, were analysed by employing the first and second law of thermodynamics. In this regard, the first and second law efficiencies, the magnitude and place of exergy losses in these production stages were estimated and discussed in detail. It was concluded that the exergy loses took place mostly during the sherbet production process (Z I,sp =96.8% Z II,sp =49.3%) because of the irreversibility in the sub-operation stages, which are vapour production, circulation sherbet mixing and bagasse compression. Therefore, it is generally suggested that the irreversibility, mostly stem from the finite temperature differences at the production stages, should be reduced to conduct more productively the sugar production process.

The first and second law analyses of thermodynamic of pumpkin drying process

“…The first law is widely used in engineering practice and is the basis of the heat-balance method of analysis that is commonly used in engineering systems performance analysis. However, the second law involves the reversibility or irreversibility of processes and is a very important aspect in the exergy method of energy systems analysis (Bayrak, Midilli, & Nurveren, 2003;Dincer & Cengel, 2001). In this regard, energy is a fundamental concept of thermodynamics and one of the most significant aspects of the engineering analysis (Bayrak et al, 2003;Dincer, 2000).…”

Thermal Modelling and Experimental Validation of a Walk-in Type Solar Tunnel Dryer for Drying Fenugreek Leaves (Methi) in Indian Climate

“…Exergy is defined as the maximum amount of work that can be produced by a system or a flow of matter or energy as it comes to equilibrium with a reference environment [46][47][48][49][50][51][52]. Exergy is a true measurement of the quality or grade of energy, and it can be destroyed in the thermal system.…”

Reducing energy availability losses with open parallel microchannels embedded in a micropatterned surface

“…Better performance of compressors and condensers in refrigerating systems can be achieved by tracking system component irreversibilities (StegouSagia and Paignigiannis, 2003). Irreversibilities of vapour production, circulation mixing and compression stages in sugar production applications were documented by Bayrak et al (2003). Further significance of exergy analysis for solar energy systems and thermal energy storage (Dincer and Rosen, 2000;Bejan, 2003) has been previously reported.…”