As Pam Tom points out:
"The Seafood Network Information Center web site has two downloadable
spreadsheet files for ice calculations at
http://seafood.ucdavis.edu/pubs/publications.htm
"All you need to do is plug in the values and the spreadsheet does the
calculations for you.
"1.) Calculating Slush Ice Needed for Fishing (Excel file) created by Ken
Hilderbrand (Sea Grant Extension Specialist) at Oregon State
University (1999)
"2.) Calculating Wet Ice Needed for Fishing (Excel file) adapted by Robert
J. Price (Sea Grant Extension Specialist) at UC Davis (1999)"
In the way of further explanation:
The first calculation is for "Slush Ice" in a flooded hold where you need to
consider the ice needed to chill the seawater flooding the hold. Flooded
holds are typical in slush ice systems in Alaska and Oregon (to reduce free
surface sloshing which makes the boat unstable). The math is complicated by
the fact that the more ice needed for the anticipated catch, the less
seawater needed to flood the hold and, of course, then less ice to chill
that seawater. The model makes some assumptions that may not fit every
circumstance but it was field tested in 1983 in the Bering Sea cod fishery
and was quite accurate. The model assumes that chilled sea water will be
spilled out of the hold whenever fish is added. My colleague Ed Kolbe has a
similar model written in Basic language which assumes no spillage of
seawater - and therefore not a flooded hold. If someone really wants the
equations for these calculations let me know - I can probably find them in
my old files.
The second calculation model for "Wet Ice" by Bob Price is written for the
simpler calculations now being discussed - where you have only fish, ice,
and heat leak to consider.
Kenneth S. Hilderbrand Jr.
Seafood Processing Specialist
Sea Grant Extension Program
Oregon State Univ. Marine Science Center
2030 Sth Marine Science Drive
Newport, Oregon 97365-5296 USA
phone: 541 867-0242
fax: 541 867-0138
email: <ken.hilderbrand@hmsc.orst.edu>
This archive was generated by hypermail 2b29 : Fri Jul 14 2000 - 09:17:13 PDT