"

From 2011.igem.org

Oh hai.

Some comments:

• When you define steady state as meaning 99% of the cellulose is used up, it becomes unclear what it means for cellobiose or glucose.
• You say Figure 3 shows cellobiose doesn't reach a steady state. But it goes to zero. If you mean it goes negative, you'll have to replot the graph to show that...
• You say "Analysing steady state is important to find out whether a system accumulates excess mass or energy" - but we know it can't in reality, right, since this violates physics? Do you mean analysing steady state is important as a way of testing if the model is sane?

Allancrossman 16:38, 9 September 2011 (CDT)

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Tables for Yassen

Equipment	Size (m3)	Cost constant (£)	Index	Purchase cost (£)	Number required	Total cost (£)
Boiler	8	70	0.8	13,218.33	4	52,873.31
Reactor 1	4	18,5000	0.45	47,158.74	1	47,158.74
Reactor 2	4	18,500	0.45	34,522.22	1	34,522.22
Reactor 3	4	18,500	0.45	34,522.22	1	34,522.22
Reactor 4	4	18,500	0.45	34,522.22	1	34,522.22
Reactor 5	4	18,500	0.45	34,522.22	1	34,522.22
Reactor 6	4	18,500	0.45	34,522.22	1	34,522.22
Tank 100-102	3.3	1,400	0.55	2,699.67	3	8099.01
Tank 103	93.2	1,400	0.55	16,955.35	1	16,955.35
Tank 104	40	1,400	0.55	10,647.83	1	10,647.83
Tank 105	147	1,400	0.55	21,784.75	1	21,784.75
Tank 106	17	1,400	0.55	6,650.82	1	6,650.82

Factorial number	Item	Factor
f1	Equipment erection	0.45
f2	Piping	0.45
f3	Instrumentation	0.15
f4	Electrical	0.1
f5	Buildings, process	0.1
f6	Ancillary buildings	0.2
colspan="2"	Total = 1.45
f10	Design and Engineering	0.25
f11	Contractor’s Fee	0.05
f12	Contingency	0.1
colspan="2"	Total = 0.4

Type	Amount	Unit price	Cost
Steam	200 kg/h	£7/t	£9811.2
Cooling water	3,000 kg/h	1.5p/t	£315.36
Power	100 kwh/d	1.2p/mj	£43,200

Equipment number	Equipment name	Comment
Tank 100,101,102	Feed storage tanks	Capacity: 3.3 m3
Tank 103	Product storage tank	Capacity: 93.2 m3
Tank 104	Product storage tank	Capacity: 40 m3
Tank 105	Product storage tank	Capacity: 147 m3
Tank 106	Product storage tank	Capacity: 17 m3
R-1	Pre-treatment reactor	Capacity:8 m3, 140 C, 20 bar
R-2	Thermal depolymerisation of hemicellulose	Capacity: 4 m3
R-3	Hydrous pyrolysis of lignin	Capacity: 4 m3
R-4	Degradation of cellulose	Capacity: 4 m3
R-5	Conversion of glucose to sorbitol	Capacity: 4 m3
R-6	Conversion of glucose to fructose syrup	Capacity 4 m3
P-1, P-2	Pumps
D-1	Recovery column	1 bar
HE-1, 2, 3, 4	Heat exchangers
LI-1, 2, 3, 4, 5, 6, 7, 8, 9	Level indicators	PID control
TI-1, 2, 3, 4, 5, 6	Temperature indicators	PID control
FI-1 to FI-15	Flow indicators	PID control
V-1, 2, 3, 6, 7, 8	Mixing valve
V-4, 5	Angle valve
V-9 to V-42	Gate valve