Experimental Studies of Freezing Fouling of Model Food Fat Solutions Using a Novel Spinning Disc Apparatus

Autor:	William R. Paterson, R Y Nigo, N E Houghton, D.I. Wilson, Yong Min John Chew
Rok vydání:	2009
Předmět:	Fouling General Chemical Engineering Energy Engineering and Power Technology Thermodynamics Laminar flow chemistry.chemical_compound Fuel Technology chemistry Tripalmitin Fluid dynamics Shear stress Cylinder Deposition (phase transition) Composite material Spinning
Zdroj:	Energy & Fuels. 23:6131-6145
ISSN:	1520-5029 0887-0624
DOI:	10.1021/ef900668f
Popis:	The freezing fouling behavior of a model food fat solution consisting of tripalmitin (PPP) in paraffin oil on 316 stainless-steel surfaces was studied using a novel spinning disc apparatus (SDA). The SDA features an internally cooled, vertical rotating cylinder, which is immersed in the warm test solution. Insulation ensures that deposition occurs only on the base. Computational fluid dynamics (CFD) simulations of the laminar flow field yielded heat-transfer predictions in good agreement with experimental measurements. The shear stress acting on the deposit and its surface temperature could therefore be estimated reliably. Studies of freezing fouling at surface temperatures of 2−30 K below the cloud point of solutions of 2−10 wt % PPP showed that the fouling behavior is sensitive to composition, surface temperature, and fluid flow. The deposit consisted of gels of PPP platelets, with solid concentrations much greater than that in the bulk solution. The composition of the deposit varied strongly with forma...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::85dca51ed0d840f514f03677ec3c47e7 https://doi.org/10.1021/ef900668f Zobrazit plný text záznamu