Iron vs. Titanium for Material of Construction

Wednesday, August 20, 2008

Titanium vs. Iron for Material of Construction
Current mood: artistic
Category: Writing and Poetry


.....................................................................................

............................All Iron..........................All Titanium...........


Cost ....................$5600......................................$14700...........

.

efficiency...............0.70........................................0.75..........

.

Life......................???........................................20.years......

.

SV........................none........................................$2000.........

.

installation.........$1000.......................................$1000...............

.

req'd Power

@(100%.eff.).........42.KW.......................................42.KW..............

.

operation...............24hrs/day..for..300days/year................................

.

Power Cost............$0.005/1EE06.Joules...........................................
.

Interest...................i.=0.10.............................................................................

.....................................................................................

.

Iron Pump:

.................Annual Power Cost..= $7775.38/yr............................

.

.........EUAC(iron).=.($5600+$1000)(A/P,0.10,20.yrs.+.$7775.38)

....................= $8550.62......annual.compounding...............

....................= $8578.14......continuous.compounding.........

.

Titanium Pump:........................................................................

.

...........................Annual Power Cost = $7257.02......................

.

...........EUAC(Ti) = $9066.22..annual compounding...

....................= $9133.69..continuous compounding..

.

using continuous compounding values

.........($6600)(A/P,0.10,n) + $7775.38 = $9133.69

.

.........(A/P,0.10,n) = 0.205804214..............................................

................................................................................................

.........n = 7.17 yrs...............................................................

.....................................................................................
the iron pump must last 7.17 years to make the alternatives wash!!

.....................................................................................

.

Woody Out.


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