From: "Phil Scott" 
Newsgroups: alt.building.construction alt.home.repair alt.hvac misc.consumers.house
Subject: Re: Central Air v. Window-unit Air?
Date: Mon, 8 Aug 2005 23:34:05 -0700


"PrecisionMachinisT"  wrote in 
message 
news:R-CdnZ2dnZ1y2Fe_nZ2dncuWat-dnZ2dRVn-zJ2dnZ0@scnresearch.com...
>
> "Phil Scott"  wrote in message
> news:dd706r$cth$1@news.tdl.com...
>>
>> "JTMcC"  wrote in message
>> news:opxJe.3910$j21.1726@news01.roc.ny...
>> >
>> > "Phil Scott"  wrote in message
>> > news:dd1uav$701$1@news.tdl.com...
>> >>
>> >
>> >>
>> >> Now a question?   What do you think happens to an all 
>> >> steel
>> >> ship, with frozen storage holds 6 decks deep, below the
>> >> water level, with only the outside of envelope of the 
>> >> holds
>> >> insulated, not the steel plates between the 
>> >> holds...those
>> >> welded solid of course across the hull.
>> >>
>> >> Thats exciting.
>> >>
>> >>
>> >> Phil Scott
>> >>
>> >
>> >
>> > No it's not. What thrills you about modern steels used at
>> > low temperatures? It's an everyday occurance. Don't be so
>> > afraid.
>>
>>    You didnt answer the question.  I do.   I met the design
>> builder in Honolulu two months later.
>>
>>   So tell me what happened in this case.  It was in alaska
>> approx 1981.   Smart remarks dont count, just an outcome 
>> and
>> what would cause that outcome.   Many people I talk to in 
>> this
>> business know instantly what will happen in a case like 
>> that.
>>
>
> With a change of 100 deg F, thermal expansion / contraction 
> of mild steel is
> appx 3/4in per 100 ft. of length.
>
> In your case above it is concievable that the inner welds 
> could have failed
> given it was a fairly large ship, and provided the 
> temperature change
> occured rapidly enough that heat heat wasnt transferred 
> quickly enough so as
> to equally soak all of the structural members.
>
> In real life, this would be pretty damned difficult to 
> accomplish, at
> best--100 deg is a fairly large delta.


As the refrigeration systems were started up, 3ea 600 ton 
ammonia screw machines, the holds reached minus 20F... the 
bankers and other other investors were gathered on deck 
drinking champagne and eathing sushi...  a noise some 
described as a howitzer being fired occurred, and the ship 
shook violently as the high rollers fled for the gang plank 
and watched the ship break in half and sink in a matter of 
minutes, all that was sticking out of the water was an antenna 
mast


I met the guy who designed and built the refrigeration on the 
ship in Honollulu about 6 months later. (getting ready be the 
chief engineer on one of Haddon Salts lobster boats ..H Salt 
Esquire fish and chips magnate... I met him in Honolulu as 
well and refrigerated one of his boats, a 160'  lobster 
boat...a single stage R502 blast freeze system  fit  into one 
of the boats holds.)




Phil Scott




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> SVL
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