Pr. Transmitter |
DAS Unit |
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Modem |
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Acquisition |
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RTD |
Input |
A/D Conversion |
Network |
Communication |
Lap Top / Desk Top |
Channels |
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Cable |
Link Cable |
PC |
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Trans. Power |
For Cascading |
RS - 232 |
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Supply |
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T/C |
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Comm. To PC |
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Input Power
230 V- AC (+/- 10 %)
50 Hz
SYSTEM CONFIGURATION FOR
PORTABLE DATA ACQUISITION SYSTEM
Section: 2.4 Page 10/10
2.5 GAS ANALYZER
(CARBON DIOXIDE: NON-FUEL CELL BASED)
1)Instrument will be portable, microprocessor based for direct measurement and display of carbon dioxide in flue gas.
2)Carbon dioxide will be measured by infrared principle.
3)The instrument will have built in / add on filter for trapping particle size less than 1 micrometer, flow meter & needle control valve to regulate flow to the desired level.
4)The analyzer shall be transported from site to site and is to be used with customer’s sample conditioning system as shown in diagram.
5)The instrument should be rated for more than 24 hours continuous service
6)Self-diagnostic for easy fault finding.
7)The analyzer shall have a direct digital display (LED/LCD)
8)Operating range: 0-20%
9)Accuracy:
a)better than + / - 2 % including linearity and repeatability.
b)intrinsic accuracy better than + / - 1%
c)overall accuracy better than + / - 3% including a) & b) above
11)Response time: 90% of full scale in less than 10 sec or better at sample rate of 1.5 lit/min.
12)Warm up time: - 1 hour preferably.
13)Provision for zero & span adjustment for calibration.
14)Sample gas condition: maximum temp – 60 degree centigrade; condition-oil free, non-
corrosive & non-condensing; flow rate - 500-1500 ml/minute; particulate: less than 1 microns; pressure-0.1-0.4 kg/cm2; connection-inlet 1/8” NPT female /1/4” NTP female. (sample conditioning system to be in purchasers scope)
15)Power requirement :220 VAC, 50 HZ
16)Calibration : calibration of zero & span to be programmed from front panel
17)Spares & consumable: service spares e.g. filters and other consumables sufficient for 5 years to be quoted separately (optional).
18)Documents: operation & maintenance manual (3 sets).
19)Notes:
a)data sheets to be submitted along with the offer clearly indicating deviations, if any.
b)detailed quality, plan & type test report to be submitted after ordering for approval.
c)Test Guarantee Certificate to be submitted before the dispatch clearance.
20)Maintenance: after sales maintenance support to be available in India through authorized representative or directly.
Section: 2.5 Page 1/3
Technical Data Sheet: Gas Analyzer: (Carbon Dioxide: Non fuel cell based)
The following data shall be furnished for the equipment model quoted.
Sl.No. |
NTPC Requirements |
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Vendor Compliance |
Remarks / |
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Deviations |
1. |
Manufacturer’s Name |
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2. |
Model No. |
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3. |
Ordering Code |
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4. |
Transportable micro-processor based for direct |
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measurement and display of carbon dioxide in flue gas |
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5. |
Principle of measurement: Infrared |
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6. |
Built in / add on filter for trapping particle size less than |
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Micrometer, flow meter & needle control valve to |
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Regulate flow to the desired level |
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7. |
Suitability to accept customer |
sample |
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Conditioning system (As shown in diagram) |
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8. |
Suitability for continuous duty for 24 hours minimum |
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9. |
Self diagnostic for easy fault finding |
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10. |
Direct Digital display (LED/LCD) |
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11. |
4-20 milli-amp output (Isolated) |
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12. |
Operating Range – 0-20% |
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13. |
Accuracy: |
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a) Better than +/-2% including |
linearity and |
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repeatability |
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b) Intrinsic Accuracy : better than +/- 1% |
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c) Overall accuracy Better than +/-3% including |
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(a)&(b) |
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14. |
Response Time: 90% of full scale in less than 10 sec. |
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or better |
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15. |
Warm up time: 1 hour preferably |
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16. |
Provision for zero and span adjustment for calibration |
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from front panel |
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17. |
Suitable for the gas sample as below without loss of |
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performance. |
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Gas condition: Max Temp – 60o C Condition – oil |
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free, non corrosive and non condensing, flow rate – |
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500-1500 ml per minute, particulate – less than 1 |
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microns, pressure – 0.1 – 0.4 kg/cm2, connection – |
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inlet ¼” NTP female, flue gas composition-CO2, O2, |
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CO, NOx, SOx, N2, etc. |
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Section: 2.5 Page 2/3
Sl.No. |
NTPC Requirements |
Vendor Compliance |
Remarks / |
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Deviations |
18. |
Power Requirement: 220 VAC, 50 HZ |
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19. |
Calibration: calibration of zero and span to be |
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programmed from front panel |
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20. |
Standard Consumables: service spares viz. Filters & |
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other consumables for 5 years operation. (optional) |
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21. |
Weight & size (suitable for transportability) |
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22. |
Documents: Operation & Maintenance manual ( 2 |
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sets) |
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Notes:
A.Data sheets to be submitted along with the offer clearly indicating deviations, if any.
B.Detailed Quality Plan & Type test report after ordering to be submitted for approval
C.Test & Guarantee Certificate to be submitted before the dispatch clearance
Maintenance: After sales maintenance support to be available in India through authorized representative or directly.
Section: 2.5 Page 3/3
2.6 GAS ANALYZER (OXYGEN and CARBON MONOXIDE:
NON-FUEL CELL BASED)
1)Instrument will be portable, microprocessor based for direct measurement and display of oxygen & carbon monoxide in flue gas.
2)Oxygen will be measured by paramagnetic detection principle/zirconium cell
3)Carbon monoxide will be measured by infrared principle.
4)Both oxygen & carbon monoxide measurement will be done in multiple selectable range.
5)The analyzer shall also incorporate a non-dispersive infrared optical bench assuring maximum sensitivity and minimum cross interference from components other than carbon monoxide.
6)The analyzer shall have a direct digital display for both oxygen & carbon monoxide.
7)The analyzer shall have isolated signal output in current/voltage/RS-232 for both oxygen and carbon monoxide for communication to IBM compatible PC.
8)Operating range: oxygen (0-3 %), carbon monoxide (0-500 ppm).
9)Minimum range oxygen (0% - 1 %), carbon monoxide (0 – 200 ppm).
10)Maximum range: oxygen (0%-25%), carbon monoxide (0 – 2000 ppm).
11)Linearity: better than: 1% of full scale.
12)Repeatability: better than 1% of full scale.
13)Accuracy:
a)a) better than + / - 2 % including linearity and repeatability.
b)intrinsic accuracy better than + / - 1%
c)overall accuracy better than + / - 3% including a) & b) above
14)Response time: 90% of full scale in less than 10 sec or better.
15)Warm up time: 1 hour preferably.
16)Provision for zero & span adjustment for calibration.
17)Sample gas condition: maximum temp – 60 degree centigrade; condition - oil
free, non-corrosive & non -condensing; flow rate - 500-1500 ML/minute; particulate-less than 1 microns; pressure-0.1-0.4 kg/cm2; connection-inlet 1/8 metric NPT female /1/4 metric NTP female.
18)Power requirement: 220 V AC, 50 HZ .
19)Calibration : calibration of zero & span to be programmed from front panel
20)Spares & consumable: service spares viz filters & other consumables sufficient for 5 years to be quoted separately (optional).
21)Documents: operation & maintenance manual (2 sets).
22)Notes: a) data sheets to be submitted along with the offer indicating deviations if any, clearly. B) detailed quality plan & type test report after ordering to be submitted for approval. C) Test Guarantee Certificate to be submitted before the dispatch clearance.
23)Maintenance: after sales maintenance support to be available in India through authorized representative or directly.
Section: 2.6 Page 1/3
Technical Data Sheet: Gas Analyzer (Oxygen & Carbon Monoxide) (Non fuel cell based)
The following data shall be furnished for the equipment model quoted.
Sl.No. |
NTPC Requirements |
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Vendor Compliance |
Remarks / |
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Deviations |
1. |
Manufacturer’s Name |
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2. |
Model No. |
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3. |
Ordering Code |
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4. |
Transportable micro-processor based for |
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direct measurement and display of oxygen & |
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carbon monoxide in flue gas |
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5. |
Principle of measurement: |
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a) For oxygen: Paramagnetic detection/ |
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zirconium cell based |
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b) For carbon monoxide: Infrared detection |
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6. |
Oxygen & carbon monoxide measurement in |
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multiple selectable range |
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7. |
Components of optical bench to be |
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replaceable without disturbing alignment |
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8. |
Direct digital display for both oxygen and |
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carbon monoxide (LED/LCD) |
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9. |
Isolated signal output in current/voltage for |
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both oxygen and carbon monoxide for |
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communication |
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10. |
Operating Range: |
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Oxygen: 0-3% |
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Carbon monoxide: 0-500 PPM |
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11. |
Minimum range: |
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Oxygen: 0% - 1% |
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Carbon monoxide : 0 – 200 PPM |
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12. |
Maximum range: |
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Oxygen: 0%-25% |
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Carbon monoxide : 0-2000 PPM |
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13. |
Accuracy: |
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a) Better than +/-2% including linearity and |
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repeatability |
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b) Intrinsic accuracy: better than |
+/- 1% |
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c) Overall accuracy better than +/-3% |
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including (a)&(b) |
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14. |
Response Time: 90% of full scale in less |
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than 10 sec. or better |
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15. |
Warm up time: 1 hour preferably |
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Section: 2.6 Page 2/3
Sl.No. |
NTPC Requirements |
Vendor Compliance |
Remarks / |
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Deviations |
16. |
Provision for zero and span adjustment for |
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calibration |
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17. |
Suitable for the gas sample as below without |
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loss of performance. |
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Gas condition: Max Temp – 60o C Condition |
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– oil free, non-corrosive and non-condensing, |
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flow rate – 500-1500 ml per minute, |
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particulate – less than 1 microns, pressure – |
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0.1 – 0.4 kg/cm2, connection – inlet ¼” NTP |
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female, flue gas compositionCO2, O2, CO, |
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NOx, SOx, N2, etc. |
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18. |
Power requirement: 220 VAC, 50 HZ |
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19. |
Calibration: calibration of zero and span to |
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be programmed from front panel |
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20. |
Standard Consumables: Service spares viz. |
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Filters & other consumables for 5 years |
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operation.(Optional) |
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21. |
Documents: Operation & Maintenance |
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manual ( 2 sets) |
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Note:
A)Data sheets to be submitted along with the offer clearly indicating deviations, if any.
B)Detailed Quality Plan & Type test report after ordering to be submitted for approval
C)Test and Guarantee Certificate to be submitted before the dispatch clearance
Maintenance: After sales maintenance support to be available in India through authorized representative or directly.
Section: 2.6 Page 3/3
2.7 INTEGRATED DATA ACQUISITION AND ANALYSIS SYSTEM
SOFTWARE (IDAAS)
System Description |
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Software Environment |
Windows 3.1 / Windows 95 |
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Method of Acquiring Data |
Automatic inputs from any data acquisition system’s |
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software that supports DDE links |
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Manual inputs via the PC’s keyboard |
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Engineering Functions |
Thermodynamic Properties of Steam |
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Available |
Turbine Calculations – efficiency, bowl efficiency, initial |
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conditions, corrections etc. |
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Flow calculations – nozzle, orifice |
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Heat exchanger calculations – TTD, DCA, LMTD, heat |
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transfer coefficient, expected LMTD, expected back |
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pressure, etc. |
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Pump calculations – velocity head, total head, water |
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horsepower, corrected flow, head and power etc. |
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Uncertainty calculations – precision error, bias error, |
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uncertainty |
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Miscellaneous Calculations – waterlog corrections, annual |
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cost of heat rate deviations, density of air, conversion of |
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units, etc. |
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Spreadsheets |
Macro based menu driven main data display sheet, controls |
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Main Driver |
flow of data (buttons to start, or stop a test, recompute |
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results, etc. are located here). This sheet prompts you for the |
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name of the test template you wish to use, and will give you |
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a default test workbook name, that it will create for you to |
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accept or change |
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Test Workbook |
The result of every test is a complete, stand alone EXCEL |
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spreadsheet with all raw values, computed values, |
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instrument calibrations, plant constants, graphs, etc. |
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Test Templates |
A 6 page spreadsheet of the standard procedure for a test. |
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Each type of test will have a unique template with: |
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i) |
Measured Values – table of what will be measured, |
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which hardware channel the signal is coming in on, |
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and the ID of the instrument to be used. |
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ii) |
Computed Values – table of what calculations are to |
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be made. For any calculation, the user enters the |
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name of the function to be used (i.e. turbine |
Section: 2.7 Page 1/3
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efficiency), and the parameters to be used (i.e. inlet |
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temperature and pressure and exit temperature and |
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pressure). The parameters can be measured values, |
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other computed values, plant characteristics, or |
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constants. Many calculations are done automatically |
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by IDAAS for every input, such as converting the |
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raw signal to engineering units, averaging minimum, |
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maximum, standard deviation and bias error. |
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iii) |
Plant Characteristics – list of data to be obtained |
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from the Plant Characteristics Workbook. Items that |
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are rarely, if ever changed are stored here for use in |
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any test, such as waterleg measurements, number of |
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tubes in the condenser, expected turbine efficiency |
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etc. |
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Real Time Plots – this table defines what graphs the user |
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wants plotted as the data is being collected, and how the |
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graphs will look. Typical examples include plotting critical |
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temperatures, pressures or flows to monitor the stability of |
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the test, final results, such as turbine efficiency, and the |
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uncertainty and precision error of the final result. |
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Plots – this table defines what graphs will be stored and |
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updated after each test run. A graph can be set-up to contain |
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one point from each test, or IDAAS will create a graph for |
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each run (similar to the real-time plots) and plot one point |
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from each scan. (For example, a feedwater heater test may |
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have several test runs at various water levels, and you would |
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plot the terminal temperature difference and drain cooler |
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approach from each run verses heater level) |
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Software – miscellaneous information on the DDA link and |
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how fast to collect data |
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Instrument Calibration |
The results of an instrument calibration is entered once, |
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Workbook |
along with its unique instrument ID. Automatically a |
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regression is performed on the data and a second order |
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polynomial curve fit is created and stored for the instrument, |
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the results of which are presented in graphical and tabular formats. This calibration is available for any test, and the instrument can be used on any channel, by simply entering the instrument’s ID and channel number in the measured values table.
Section: 2.7 Page 2/3
Plant Characteristics |
Stores information on each unit that is then available for any |
Workbook |
IDAAS test, such as waterleg measurements, expected |
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performance, heat rate correction factors, flow nozzle data |
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such as type of material and pipe diameter, etc. This |
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workbook also includes a template for curve fitting data |
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such as pump curves, so the coefficients can be calculated |
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and placed in the Plant Characteristic Workbook. |
Limits on Test Size |
Number of Inputs and computed variables – 1000 |
Number of Real Time Plot |
8 and 32 |
Graphs and Variables |
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Number of Plot Graphs |
30 and 30 |
and Variables |
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Number of Scans |
1000 |
Uncertainty Analysis |
The user can know how precise a test result is. If the |
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uncertainty is large and unacceptable, each contributor to the |
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overall uncertainty is available to see where improvements |
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need to be made (better accuracy instrumentation or steadier |
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readings). Also, in real-time, as the data is being collected, |
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you can see the uncertainty and minimize the time spent |
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collecting data. |
Simple Recalculation |
If an error in the manual data entry is found, or part of the |
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automatic data entry needs to be deleted during some |
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portion of the test, or an instrument calibrations is incorrect, |
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etc. the error is corrected (data deleted, or correct data |
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entered) and then the recomputed button is pushed, causing |
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all results, graphs, to be automatically corrected. This can be |
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done at the test site, or later in the office. |
Quantity |
Single user |
Section: 2.7 Page 3/3