%0 Journal Article 
%A Martínez Hernández, David Sebastián
%A Solano Fernández, Juan Pedro
%A Illán Gómez, Fernando
%A Viedma Robles, Antonio
%T Analysis of heat transfer phenomena during ice slurry production in scraped surface plate heat exchangers
%D 2014
%@ 0140-7007
%U http://hdl.handle.net/10317/5508
%X 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.
%K Máquinas y Motores Térmicos
%K Mecánica de Fluidos
%K Active techniques
%K Heat transfer enhancement
%K Heat exchanger
%K Scraped surface
%K Ice slurry
%~ GOEDOC, SUB GOETTINGEN