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WorksheetsWI Socialization - Generator H2 Dryer Regeneration
Total questions: 20
Worksheet time: 12mins
Where is H2 dryer located?
Inside of turbine building
Same floor level with seal oil and CO2 vaporization skid
Consist of Generator H2 cooling system skid
Beside the GT water mist compartment
Inside of generator compartment
What is/are special tool(s) that conducted for this instruction?
H2 gas detector
Non-spark tool
SCBA
Fireguard wearpack
Following the work instruction, what is/are the indication(s) that the H2 dryer should be done to regenerate?
The purity of H2 dropped to less than 96%
The H2 pressure in generator dropped to <4.9 bar
The silica gel in H2 dryer have white color
Shift leader makes a command to regenerate the dryer.
Dryer inlet isolation valve has marked by?
(a)
Dryer outlet isolation valve has marked by?
(a)
Dryer outlet vent valve has marked by?
(a)
H2 isolation valve to Generator from Dryer has been marked by?
(a)
H2 isolation valve from Generator to Dryer has been marked by?
(a)
Dryer CO2 supply isolation valve has marked by?
(a)
How much CO2 Expansion & Vaporization outlet pressure and temperature setpoint?
15 bar & 15°C
16 bar & 15°C
15 bar & 16°C
16 bar & 16°C
How much CO2 flow adjusted during dryer line CO2 purging?
10 Nm3/h
11 Nm3/h
12 Nm3/h
13 Nm3/h
CO2 purging for dryer line has performed for ... minutes
(a)
Generator H2 Dryer regeneration is carried out when the silica gel color has yellow.
True
False
What are the right steps for H2 dryer regeneration?
1. Start dryer regeneration from DCS
2. Maneuver 3-way valve to "Gel Regeneration"
3. Ensure CO2 purging has been done
4. Keep regeneration until silica changes the color to orange (approx. 6 hours)
2 - 3 - 1 - 4
3 - 2 - 1 - 4
1 - 3 - 2 - 4
3 - 1 - 2 - 4
How much expected H2 purity value in Generator?
94 - 96 %
94.8 - 96.2 %
95.2 - 97 %
96 - 99.8 %
What condition if the dryer 3-way valve has position like at the picture?
Dryer regeneration
CO2 purging
H2 drying inservice
H2 drying and regeneration
On dryer regeneration, air dryer will auto start when the dryer outlet temperature <114°C.
True
False
On dryer regeneration, air dryer will auto stop when the dryer outlet temperature <114°C.
True
False
On dryer regeneration, air dryer will auto-stop when the dryer outlet temperature is more than ......
114 °C
115 °C
116 °C
117 °C
118 °C
What is/are the success measurement(s) of this instruction?
H2 silica gel color is orange
H2 purity in generator >96%
H2 pressure in generator >5 bar
No any gas leak is detected
