ISSN:
1750-3841
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Magnetic Resonance Imaging (MRI) was used to obtain 2-dimensional temperature maps in potatoes undergoing aseptic processing. The change in precession frequency of protons served as the temperature indicator. The larger particles (6.9 and 3.84 cm3) showed a δT (Tsurface - Tcenter) of up to 22±0.4°C 45s after exiting the heat exchanger with the δ (Toutlet - Tinlet) of the carrier fluid in the heat exchanger at 30 to 45°C. No AT was measured between the center and the surface of particles 〈2.05 cm3 pumped at 〈22.7 L/min. The average fluid to particle convective heat transfer coefficient (hfp) for the heat exchanger and holding tube was calculated using a finite element method. The hfp was from 600 to 2500 and 〉3000 W/m2°C for the large (6.9 cm3 cubes) and smaller particles respectively.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2621.1998.tb15731.x
