scraped-surface heat exchanger

Lemma

scraped-surface heat exchanger

Etichetta di dominio

EN

Etichetta grammaticale

c. n.

Definizione

Device used in the food, chemical, and pharmaceutical industries for heat transfer, crystallization, and other continuous processes. 1

Nota

Being suited for products that need some degree of crystallization, it is useful for wine-making. 

An 
inside 
cylindrical 
shaft with scraping 
blades 
mounted 
around the
 circumference 
is
 fitted
 inside 
a
 larger
 annular 
tube. A 
coolant 
fluid 
is 
contained 
inside 

an 
insulated
 jacket
 outside 
the 
larger 
annular 
tube. 
As 
the
 wine chills,
 tartrate
 crystals 
form
 along 
the
 walls 
of 
the
 outside cold, 
annular 
tube.
They
 are 
then
 scraped
 off
 by
 the 
blades,
 and
 removed
 from
 the
 wine. 2

Contesto

In the Crystal Flow Process, wine is chilled to its freezing point, between 14°F and 21°F, which generates potassium bitartrate and ice crystals. These crystals act as nuclei for further crystal growth. This process requires the use of scraped-surface heat exchangers. 3

Trascrizione fonetica

/'skreɪpəd 'sɜːfəs hiːt ɪks'tʃeɪndʒer/ 4

Sinonimi e Antonimi

Dynamic heat exchanger.

Abbreviazioni
ND
Etimologia

Scrape (v.): early 13c., probably from Old Norse skrapa "to scrape, erase," from Proto-Germanic *skrapojan, from PIE *skerb-, extension of root *(s)ker- "to cut".
Surface (n.): 1610s, from French surface "an outermost boundary, outside part" (16c.), from Old French sur- "above" + face. Patterned on Latin superficies "surface, upper side, top".
Heat (n.): Old English hætu, hæto "heat, warmth; fervor ardor," from Proto-Germanic *haita- "heat", from PIE *kaid-, from root *kai- "heat."
Exchange (v.): late 15c., from Old French eschangier "exchange, barter," from Vulgar Latin *excambiare. 5

Etichetta di paese
ND
Ente

Università degli Studi di Genova, Facoltà di Lingue e Letterature Straniere, Corso di Laurea in Teorie e Tecniche della Mediazione Interlinguistica

Data della scheda
Fri Sep 19 14:18:49 2014
Autore

Francesca Bernini

Fonti

1 : http://www.tandfonline.com/doi/abs/10.1080/10408390500315561#.U7RisUBTZux, 02.07.2014. Definition based on this source, written by the author of the file.

2 : http://www.tandfonline.com/doi/abs/10.1080/10408390500315561#.U7RisUBTZux ,
http://www.personal.psu.edu/mee5091/blogs/mark_emrick_eportfolio/Heat%20Exchangers%20in%20the%20Wine-Making%20Process.pdf, 02.07.2014.

3 : http://www.practicalwinery.com/sepoct08/page2.htm, 02.07.2014.

4 : Longman, Dictionary of Contemporary English, England, Pearson Education Limited, 2008.

5 : http://www.etymonline.com/index.php?term=scrape&allowed_in_frame=0,
http://www.etymonline.com/index.php?term=surface&allowed_in_frame=0,
http://www.etymonline.com/index.php?term=heat&allowed_in_frame=0 ,
http://www.etymonline.com/index.php?term=exchange&allowed_in_frame=0 , 02.07.2014.

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