TY - JOUR 
A1 - Martínez Hernández, David Sebastián
AU - Solano Fernández, Juan Pedro
AU - Illán Gómez, Fernando
AU - Viedma Robles, Antonio
T1 - Analysis of heat transfer phenomena during ice slurry production in scraped surface plate heat exchangers
Y1 - 2014
SN - 0140-7007
UR - http://hdl.handle.net/10317/5508
AB - Heat transfer during ice slurry production in a scraped surface plate heat exchanger (SSPHE) has been
experimentally investigated. By using a 7 wt. % sodium chloride brine, a wide range of operating
conditions has been tested: scraping velocities from 0.1 to 0.8 s−1 and logarithmic temperature
differences from 0.5 to 2.5 °C. Two different PEEK scraper arrangements have been used, mounted on
the driving arms: rigid scrapers and surface adaptable scrapers, pushed by torsion springs. Heat transfer
coefficients and ice production rate were measured under batch operating mode. Experimental results
shown dependence of the nucleation onset with the scraping speed and the wall supercooling degree.
Global nucleation only occurred for high velocities and low supercooling degrees, appearing only on the
wall for the other cases. A decrease of the heat transfer coefficient of 1.5 times for increasing logarithmic
temperature differences is reported, as a consequence of the ice layer growth with a low effect of the
scraping speed. The use of adaptable scrapers provide heat transfer coefficient augmentations from 2 to
4-fold with respect to the rigid configuration.
KW - Active techniques
KW - Heat transfer enhancement
KW - Heat exchanger
KW - Scraped surface
KW - Ice slurry
KW - Máquinas y Motores Térmicos
KW - Mecánica de Fluidos
LA - eng
ER -