Abstract
Parametric studies of the effects of slip irreversibility in concentrating solar power (CSP)-powered bio-digester assemblies are investigated. Complexities regarding the identification of the appropriate electro-kinetic phenomena for certain electrolyte phases are reviewed. The application of exergy analysis to the design of energy conversion devices, like solar thermal collectors, for the required heat of formation in a downdraft waste food bio-digester, is discussed. Thermal management in the silicon-based substrate of the energy system is analyzed. The rectangular-shaped micro-channels are simulated with a finite-volume, staggered coupling of the pressure-velocity fields. Entropy generation transport within the energy system is determined and coupled with the solution procedure. Consequently, the effects of channel size perturbation, Reynolds number, and pressure ratios on the thermal performance and exergy destruction are presented. A comparative analysis of the axial heat conduction for thermal management in energy conversion devices is proposed.
Highlights
The demands for innovative solar heat collection and enhanced transport from micro-channel assemblies are outpacing advances in micro-fabrication technology [1]
Effective pumping of fluid through micro and nano-channels is affected by the pressure gradient and electric potential gradient of electrokinetic operation [3]
Wegeng et al [10] studied the feasibility of a concentrating solar power (CSP)-based methane reformer, where solar energy is converted to chemical energy, for storage and power supply to a heat engine
Summary
The demands for innovative solar heat collection and enhanced transport from micro-channel assemblies are outpacing advances in micro-fabrication technology [1]. An experimental configuration is described and numerical studies of the entropy distribution within the influence layer of the charged counter-ions are presented, where an increasing pumping effect of pressure-driven flow with possible electro-kinetic coupling in micro-channel assemblies is established. This configuration enables transport of the heat carrier from a concentrating solar reactor to thermochemical energy conversion and food waste storage/homogenizing subsystems
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