|
ITEM
|
Mechanical
System
|
Liquid
Nitrogen
|
Liquid Carbon
Dioxide System
|
System Freezer Capacity & Production
Rate, lb/h |
6,000
|
6,000
|
6,000
|
6,000
|
6,000
|
6.000
|
| No. of Shifts/Day |
1
|
2
|
1
|
2
|
1
|
2
|
| Operating Time - h/yr |
2100
|
4,200
|
2,200
|
4,400
|
2,200
|
4,400
|
Annual Production
Ib/yr x 1000 |
12
|
24
|
12
|
24
|
12
|
24
|
| Freezant Usage: |
|
|
|
|
|
|
| LN2 lb/lb @5cents/Ib |
----
|
----
|
0.7
|
0.7
|
----
|
----
|
| C02 lb/lb @35cents/Ib |
----
|
----
|
----
|
----
|
0.8
|
0.8
|
Total Investment
(installed) |
|
|
|
|
|
|
| Freezer/Refrigeration |
600,000
|
600,000
|
240,000
|
240,000
|
250,000
|
250,000
|
| Operating Cost -$/yr |
|
|
|
|
|
|
| 1.Investment Related |
|
|
|
|
|
|
Fixed Depreciation at 10%
|
60,000
|
60,000
|
24,000
|
24,000
|
25,000
|
25,000
|
Interest12% Simple
(10 year amortized) |
36,000
|
36,000
|
14,400
|
14,400
|
15,000
|
15,000
|
| Maintenance@4% |
24,000
|
24,000
|
----
|
----
|
----
|
----
|
Maintenance LN2
& LCO2@10% |
---- |
---- |
24,000 |
24,000 |
25,000 |
25,000 |
| 2.Variable Costs |
|
|
|
|
|
|
| Power @ 5cents/kWh |
29,800 |
59,600 |
---- |
---- |
---- |
---- |
| Operator Labor @8.00/h |
16,800 |
33,600 |
16,800 |
33,600 |
16,800 |
33,600 |
| Cleanup Labor @ $41h-15 h/week |
3,200 |
3,200 |
3,200 |
3,200 |
3,200 |
3,200 |
| Freezant Cost -$/yr |
---- |
---- |
420,000 |
840,000
|
336,00 0 |
672,000 |
Total Annual
Operating Cost |
169,800 |
216,400 |
502,400 |
938,800 |
420,000 |
772,800 |
Unit Operating Cost
cents/lb |
1.42 |
0.90 |
4.19 |
3.91 |
3.50 |
3.22 |
| Conversion factors: g/s = lb/h x 0. 126; kg/yr = lb/yr x 0.454; $/kg = cents/lb. x 2.2 |
|
