bidding technical specification of idct 20090727

I n d i a W PCL6×60 0MW P r o j e c t B i d d i n g Tec h n i c a l Spe c i f i c a t i o n o f I DCT

Page 7 of 25

3.3 Major Specification

Reinforced concrete (No.C30)framework structure and enclosure wallboard, counter flow

induced draft cooling tower. The FRP guide flow plate to be arranged under loop beam in tower

for improve the flow condition inside of tower. The stairs, walkway, handrails, lightning rods,

etc. shall be arranged outside of cooling tower for maintenance. Also the location of the above

parts should be easily for maintenance of fills, fans, motors,etc.

3.3.1 Fans

The fan blades are highly efficient wing typed and formed by the high strength expoxy glass

steel module.The angel of blades can be adjust.Each blades can be interchanged. Polyurethaned

marginal plate to protect against corrosion will be set at the fan blades. The diameter of fan

blade isφ mm（to be filled by bidder）.

To keep the fans of the cooling towers operated stable for a long time ,the transimission shaft

adopt the imported carboform shaft and adopt the imported oil seal.

The fans adjuster adopt the strengthen design.

Oil temperature, oil level and vibration supervisory equipments and DCS system whose

message was sent to the central control room shall be installed on each fans to real-time

supervise the oil temperature and oil level in deducer casing.

The performance of fans (wind flowing and wind pressure)shall meet the requirements

of the wind flowing and wind pressure in cooling towers.

Motors and fans shall be combined with speed reducer with smoothly operation,stable

performance,low noise,free artificial maintance .It is totally enclosed. The life span of speed

reducer bearing shall be no less than 100000 hours for continued usage.The manufactory of

speed reducer is （filled by the bidder）and the life span for the complete speed reducer

shall no less than 30 years. The manufactory of fans is （filled by the bidder）and the life

span for the fans shall no less than 30 years.

3.3.2 Motors

Motors matching fans and its auxiliaries shall be designed and manufactured as per interrelated

standards and specifications.


Page 8 of 25

Each motors shall be equipped with air space heater.

The motor type is Y type horizontal asynchronous motors and installed outside, the waterproof

casing to be arranged on the top of motors.

Insulation level : F class.

Protection level: IP55.

Working electrical condition: 415V/50Hz/3Ph.

PT-100 type temperature measurement parts to be set for the front & rear bearing and

3 phase coils of motor for ensure safety running.

Steel stracture base plate shall be used for motor mounting along with necessary

antisepsis measures.

3.3.3 Water distribution devices

Water distribution devices shall keep the hardness and strength with long life span.the tubes

adopt PVC-U pipes,evenly distribution shall be considered during the design period.the

connection between pipes shall be safe and reliable and all the hanging devices shall be made of

stainless steel.The nozzles made of ABS materials could be easily adjust to the water loading

and can satify the requirements of long-term safety operation.

3.3.4 Water decanier

The Water decanier adopt modification PVC materials and the index of fireproof oxygen higher

than 35. The Water decanier is formed by machine with the thickness no lower than 0.8mm.

The rate of the Water decanier shall be calucated as per the flowing ofrecirculated water and the

drift losing rate is no higher than 0.001％.

The water decanier shall has the feature of highly rate of collecton,little air flow resistance,high

strengthen,nondeformable,easy installation and maintance.

The supporter adopt the nonmetal materials.

3.3.5 Air duct

The air duct adopts glass enforced fiber materials and recovery of kinetic energy air duct with

fire resistance property and oxygen index no lower than 28, value of recovery of kinetic

energy no lower than 30%.

The fasteners for air duct are made of steelness materials.


Page 9 of 25

The externally face shall having the feature of not cracked,constant the function of the color. the

surface adopts advanced imported gel coats and having anti ultraviolet ray.the bidder inviter

shall provide the colour of externally face ,the bidder shall comply with it.

The air duct adopts reinforced design and basic design wind pressure is 0.5kPa.

3.3.6 Filling

Filling materials adopt FRP or RPVC film fillings without reworked materials.

Filling materials are fire retardance with the index of fire retardanc oxygen no higher than 40.

The thickness of the substrate is no lower than 0.40±0.05mm.

Filling materials shall stickied into lumps with the sticking rate no lower than 95%.

The intensity of flat crushing ≥ 300kg/m2

Filling frame adopts FRP or nonmetal materials.

Filling mareials shall be easier for maintance and exchange,nailing shall not be

adopted as the way of fastening.

3.3.7 Passage for maintance in cooling towers.

The bidder shall design and offer the maintance platform for fans and maintance passage for

components in towers.

Maintance platform and passage shall adopt stainless and nonmetal materials.

Qulckly opened access door shall be available in towers with high-quality tightness and easier

to dispatch. All the materials components shall adopt stainless steel materials.

3.3.8 Lightning system

The bidder shall be responsible for the design and supply the stainless lightning rings set on the

top of each air duct.

Lightning system on the top of tower shall be lead to downtowers to connect with the earthing

system of the power plant.

3.3.9 Others

The antisepsis measures to be condsidered by bidder for all steel parts in side of

cooling tower, the life span of these parts shall be not less than 30 years. The

antisepsis measures should be taken for the surface of water drench frame column


Page 10 of 25

and beams of tower.

The average moving load at the top of tower is 4kN/m2.

3.4 Deleted.

3.5 Requirement of C&I

3.5.1 Bider must be sure that the Equipments supplied could be operating safely and

practically under any operation conditions and bider submite the documents about

measurement point list and control requirements..All the control instruments shall be

supplied along with main equipments .Bider supply alarm value ,trip value and relative

control information.

3.5.2 Instruments supplied with main equipments shall be accordance with the

insrtruments selection .All the instruments selection must be approved by the owner.

3.5.3 The pressure and DP transmitters must be accordance with HART protocol and

transmitters will be 2 –wired and smart.The accuracy will be 0.075 and external load

will be 500 ohm.Protection class shall be IP65. All cable interface must not be smaller

than 13mm.The interface will be sealed.

3.5.4 The logic switch accuracy will be 0.5 or more better ant protection class will be

IP65, All cable interface must not be smaller than 13mm.The interface will be sealed.

Switch contacts will be 2×SPDT.

3.5.5 The local indicator accuracy will be 1.5.The external diameter shall not be smaller

than 150mm.Generally,the guage point will be 2/3~3/4 of full scale when normally

operationg.Temperature guage shall be universal type.Vibration-against guage will be

adopted for vibration area.

3.5.6 All analog signal will be 4~20mA DC,temperature signals that into DCS will be

from 3-wired RTD.The electric contacts will be DPDT and the contacts capacity will

be shall be as follows:

Type 230V AC 115V DC 230V DC

I – closed contacts（sensibility loop）： 5A 10A 5A

II- continuous electrification： 5A 5A 5A

III-broken contacts： 2.5A 2A 0.5A


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3.5.7 Local control panel will be IP65 for outdoor and IP56 for indoor and the panel

must be meet the site requirements.The color shall be approved by the owner.The

instruments output signal cable will be linked to JB by contractor. Contractor should

supply the JB drawing to design institute.The cable from local instruments to JB shall

be supplied by contractor.JB will be bottom-into and the input will be sealed by PVC

plug.The terminal will be Phoenix and clip type mounted on track,Terminal spares shll

be 20%,and the space between two track will be 100mm.

3.5.8 All motor stator wind temperature shall be measured by 3-wired PT RTD and

than link into JB by contractor.l

(1) Motor stator wind temperature measurement will be six RTD,2 RTD each phase.

(2) Motor thrust bearing temperature will be measured by RTD.

3.5.9 Temperature measurements shall be meet following requirements:

(1) Mounted RTD will be clinged to bearing and easy to mount and replace outside the

equipments.

(2) Isolation layers will be very well After mount the temperature gauge.Be sure that

bearing will be isolated from earth.

3.5.10 Oil temperature measurement alarm instruments shall be supplied for gear

down box.

3.5.11 Vibrations and temperature measurement instrument shall be integrated with fas

or motor.Vibration measurement shall be done for X and Y ,and instrument output

signals shall be 4-20mADC and it will be connected into DCS.

4 Electrical requirement

Electrical equipments / systems shall comply the following International Standards

Standards Descriptions

IEC-60034 (Part-1 to Part-19)

Rotating electrical machines

IEC-60044-1 Current transformers

IEC-60044-2 Voltage transformer

IEC-60044-4 Instrument transformers: Measurement of Partial Discharges

IEC-60051(Part-1 to Part-9)

Recommendations for Direct Acting indicating analogue electrical measuring instruments and their accessories.

IEC-60076 (Part-1 to Part -5)

Power transformers

IEC-60076-10 Determination of transformer and Reactor Sound Levels


Page 12 of 25


IEC-61095 Electromechanical Contactor for household and similar purposes

IEC-60099-425 Metal oxide surge arrestors without gaps

IEC-60129 Alternating Current Disconnectors (Isolators) and Earthing switches

IEC-1129 Alternating Current Earthing Switches induced Current switching

IEC-60137 Insulated bushings for alternating voltages above 1000V

IEC-60168 Tests on indoor and outdoor post insulators of ceramic material or glass for systems with nominal voltages greater than 1000V.

IEC-60183 Guide to the selection of high voltage cables

IEC-60189 (Part-1 to Part- 7)

Low frequency cables and wires with PVC insulation and PVC sheath

IEC-60214 On-Load-Tap-Changers

IEC-60233 Tests on hollow insulators for use in electrical equipment

IEC-60255 (Part-1 to Part-23)

Electrical relays

IEC-60265 (Part-1 to Part 2)

High voltage switches

IEC-60273 Characteristics of indoor and outdoor post insulators for systems with nominal voltages greater than 1000V

IEC-60289 Reactors

IEC-60297 (Part-1 to Part- 4)

Dimensions of mechanical structures of the 482.6mm(19 inches) series

IEC-60376 Specification and Acceptance of New Sulphur Hexafloride

IEC-60437 Radio interference Test on high voltage insulators

IEC-60507 Artificial pollution tests on high voltage insulator to be used on AC systems

IEC-60694 Common specification for high voltage switchgear & control gear standards

IEC-60815 Guide for selection of insulators in respect of polluted conditions

IEC-60865 (Part-1& Part-2)

Short Circuit Current – Calculation of effects

IEC-60354 Loading Guide for oil –immersed power transformers

IEC-62271-100 High voltage alternating current circuit breakers

IEC-62271-102 Alternating current disconnectors and earth switches

IEC-60427 Synthetic Testing of High Voltage alternating current circuit breakers

IEC-61264 Pressurized Hollow Column Insulators

IEC-60358 Coupling capacitors and capacitor dividers

IEC-60481 Coupling Devices for power line carrier systems

IEC-60529 Degree of protection provided by enclosures

IEC-60947-4-1 Low voltage switchgear and control gear

IEC-60439 (Part-1&2)

Low voltage switchgear and control gear assemblies

IEC-60353 Line traps for A.C. power systems

IEC-60495 Single sideboard power line carrier terminals

IEC-60683 Planning of (single side-board)power line carrier systems

IEC-60359 Expression of the performance of electrical and electronic


Page 13 of 25


measuring equipment

IEC-60387 Symbols for alternating-current electricity meters

IEC-60447 Man Machine Interface (MMI)-actuating principles

IEC-60521 Class 0.5,1,and 2 alternating current watt hour meters

IEC-60547 Modular plug-in unit and standard 19-inch rack mounting unit based on NIM standard(for electronic nuclear instruments)

IEC-60305 Insulators for overhead lines with nominal voltage above 1000V-ceramic or glass insulator units for ac. Systems characteristics of string insulator units of the cap and pin type

IEC-60372 (1984) Locking devices for ball and socket couplings of string insulator units: dimensions and tests

IEC-60383 (Part-1&2)

Insulators for overhead lines with a nominal voltage above 1000V

IEC-60433 Characteristics of string insulator units of the long rod type

IEC-60471 Dimension of clevis and tongue couplings of string insulator units

IEC-60227(part 1 to 7)

Polyvinyl chloride insulated cables of rated voltages up to and including 450/750

IEC-60228 Conductor of insulated cables

IEC-60230 Impulse tests on cables and their accessories

IEC-60287 (Part-1 to 3)

Calculation of continuous current rating of cables (100% load factor)

IEC-60304 Standard colours for insulation for low- frequency cables and wires

IEC-60331 Fire resisting characteristic of electric cables

IEC-60332 (Part-1 to 3)

Tests on electric cables under fire conditions

IEC-60502 Extruded solid dielectric insulated power cables for rated voltages from 1kV up to 30kV

IEC-754 (Part-1 to 2)

Tests on gases evolved during combustion of electric cables

IEC-60071 Insulation Co-ordination

IEC-60060 High voltage test techniques

IEC-60270 Partial discharge measurement

IEC-61233 Guide for inductive load switching

IEC-60298 AC metal enclosed switchgear and control gear up to 52kV

IEC-105 Bus bars (Aluminium)

IEC-61641 Enclosed low voltage switchgear and control gear assemblies. Guide for testing under conditions of arcing due to internal fault

IEC-60292 Starters

IEC-60146 Semiconductor converters and Pulse transformer

IEC-61000-1995 Electromagnetic compatibility (EMC)

IEC-60148 Semiconductor rectifier assemblies and thyristor converters

IEC-60034-34 Guide for testing three phase induction motors

IEC-60079 Classification of hazardous areas

IEC-60896 Lead acid type – With Plante positive plate

IEC-60309 Plugs, socket-outlets and couplers for industrial purposes

IEC-60598 Luminaries : General requirement

IEC-60726 Dry type power transformers


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IEC-60870 Telecontrol equipment and systems

IEC-60874 Conductors for optical fibres

IEC-60921 Ballasts for tubular florescent lamps – Performance requirements

IEC-60929 AC-supplied electronic ballasts for tubular fluorescent lamps – Performance requirements

IEC-61850 Communication networks and systems in sub stations

IEC-60364 Electrical installations of buildings

IEEE-80 Std. 2000 Guide for safety in Alternating Current Sub station grounding

IEEE-665 Guide for generating station grounding

IEEE-446 Emergency standard power systems

IEEE-485 Recommended practice for sizing large lead acid storage batteries for generating stations and sub-stations

IEEE-519 Harmonic limits in power systems

IEEE-32 Requirements, Terminology and test procedure for Neutral Grounding Devices.

IEEE-48 Test Procedures and Requirement for High Voltage Alternating Current Cable terminations.

IEEE-81 Measuring Earth Resistivity Ground Impedance and Earth Surface Potentials of a Ground System.

ANSI/IEEE-242 Protection and Co-ordination of Industrial and Commercial Power Systems.

IEEE-422/1986 Guide for the Design and Installation of Cable Systems in Power Generating Stations.

IEEE/ 450-1995 Recommended Practice for maintenance, testing and replacement of Large lead Storage Batteries for Generating Stations and Substations.

IEEE-484 Installation Design and Installation of Large Lead Storage Batteries for Generating Stations and Sub-stations.

IEEE/ 605 1998 Guide for Design of Sub-station Rigid Bus Structures.

IEEE/ 979 -1979 Guide for Sub-station Fire Protection.

IEEE/ 62.1/1984 IEEE Standard for Surge Arrestors for AC Power Circuits.

IEEE PAS VOL-97 Generator Neutral Grounding Some Aspects of Application for Distribution Transformer with Secondary Resistor and Resonant Types.

4.1 AC Motors shall be suitable for 3 phase, 50 Hz supply and shall be of the

squirrel-cage induction type suitable for direct-on-line starting. The temperature rise

over 50 deg.C ambient of all motors shall be limited to Class B. The motor winding

shall be of copper. Motor shall be suitable for voltage variation of ±10%, frequency

variation of ± 5% and combined voltage and frequency variation of 10%,and also meet

the rating output.


Page 15 of 25

4.2 All insulated windings shall have Class F non-hygroscopic insulation systems rated

for Class B temperature rise above ambient temperature of 50°C in accordance with the

standards.

4.3 The rating of each motor shall be with at least 15% extra margin over the input

power requirement and shall be continuously rated. Motor shall be considerd 1.1 times

operating current. Motors shall be capable of starting and accelerating to full speed at

80% of the nominal voltage and shall not stall at 70% of nominal voltage for one (1)

minute. With voltage and frequency within permissible variation band, the motors shall

be capable of 3 equally spaced starts in 1 hour with motor initially at temperature not

exceeding rated operating temperature. 2 start in succession with motor initially at a

temperature not exceeding rated operating temperature. The starting voltage of motors

shall be 70%-80% rating voltage (the value shall be finalized by purchaser).

4.4 All motors above 30 kW shall have space heater for avoiding condensation during

idle hours. The voltage of heater shall be 240V、50Hz AC ,the power of heater shall be

__kW (To be filled in by CONTRACTOR ,finalized by purchaser) .

4.5 The noise level of motors shall be in accordance with IEC/IS 12065. The libration

shall be within the limit of IEC/IS12075. The motor shall be endure the the libration of

driving equipment.

4.6 Motors shall be self ventilated type; total enclosed fan cooled or closed air circuit

air-cooled type. Motors located outdoors shall be of weatherproof construction. The

degree of protection of motor enclosure shall not be less than IP-54 (indoor)/IP-55

(outdoor). All outdoor motors shall be provided with rain hood。

4.7 All 11 kV motors shall have six (6) winding temperature detectors, bearing

temperature detectors, hot and cold air temperature indication (for CACA, CACW type).

In addition, flow switches shall be provided for water-cooled motors and forced

lubrication bearing, if used.

4.8 Motors up to 200 kW will be 415V, rated and above 200 KW will be of 11kV. Motors

of IDCT shall be consider 415V system.

4.9 Cable box and terminal box for 11 kV motors shall be phase segregated type where

ELASTIMOLD termination with protective cover is not provided. 415V motors shall have


Page 16 of 25

non-phase segregated cable box. Cable box shall withstand maximum fault current for duration

of 0.25 sec. The sealing equipment shall be ROXTEC.

4.10 The motors shall be designed to be energy-efficient and have high power factor and

low starting currents. All HT motors shall have efficiency and power factor higher than

0.90 and 0.88 respectively.

The ratio of rating starting current and rating of current of motor:

Upto to 20kW ：Id/In<7

above 20kW ：Id/In<6.5

11kV motor ：Id/In<6

4.11 The motor winding shall be of copper.

4.12 The overspeed of motor shall be 120% and two minutes.

4.13 All motors shall be provided two grounding point at two side of motor, and have

the visible grounding indication .

4.14 All motors shall be subjected to works routine tests. In addition, 11 kV motors

winding shall conform to the requirement and impulse voltage withstand levels as per

IEC 60034-15. Type test certificate on identical rated motors shall be furnished as a

proof of design.

4.15 The bearing of motor shall be sealed, prevent the entrance of water and dust.

4.16 The life of bearing shall be more than 15 years.

4.17 The connection of between inter cable and outer of cable of motor shall be

provided by bidder.

4.18 Datasheet of motor:(To be filled by bidder)

11.0.0 MOTORS 415V

11.1.0 GENERAL

11.1.1 Application

11.1.2 Quantity

11.1.3 Make

11.1.4 Frame Size

11.1.5 Applicable Standard

11.2.0 TYPE AND RATING


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11.2.1 Type of Motor

11.2.2 Service

11.2.3 Duty Cycle/Designation

11.2.4 Normal/Energy efficient

11.2.5 Rated Continuous Output

At 50°C ambient KW

11.2.6 Rated Speed r.p.m.

11.2.7 Rated Voltage & % variation Volt

11.2.8 Rated Frequency & % variation

Hz

11.2.9 Full load current Amps

11.2.10 No load current Amps

11.2.11 Rated Power Factor

a) Full load

b) ¾ load

c) ½ load

11.2.12 Efficiency at rated voltage and frequency

a) Full load %

b) ¾ load %

c) ½ load %

11.3.0 PERFORMANCE

11.3.1 Method of Starting

11.3.2 Starting Current at rated voltage inclusive of tolerance

% f.l.c.

11.3.3 Starting Torque at rated voltage

Kg.m

11.3.4 Starting time at 80% Voltage ，，，，100% Voltage

a) With load Sec.


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b) Without load (driven equipment coupled)

Sec.

11.3.5 Safe stall time at 110% rated voltage

a) Hot condition Sec.

b) Cold condition Sec.

11.4.0 CONSTRUCTION

11.4.1 Degree of Protection of Enclosure

11.4.2 Method of Cooling

11.4.3 Insulation Class

a)

b)

c)

11.4.4 Temperature Rise Over 50°C ambient (by resistance

Deg. C

11.4.5 Tropicalised Yes/No

11.4.6 Winding Connection

11.5.0 BEARINGS D.E. N.D.E

a. Make

kV

b. Type

c. Recommended lubricant

11.6.0 MOTOR TERMINAL BOX

a. Type

b. Fault withstand

i) Current kA

ii) Time Sec.

c. Cable lugs & glands furnished

Yes/No.


Page 19 of 25

11.7.0 ACCESSORIES

11.7.1 Space Heaters

a. No. X Watt

b. Voltage, phase & frequency

Volt./Nos./Hz

11.7.2 Winding temperature detector

a. Type

b. Nos. furnished

11.7.3 Bearing temperature detector

a. Type

b. Nos. furnished

11.7.4 Temperature Indicators

a. Type

b. Nos. provided

c. Locations

11.7.5 Temperature Alarm Contact

kV

a. Nos. provided

b. Locations

c. Contact rating

11.7.6 Flow Switch

a. Type

b. Nos. provided

c. Locations

d. Contact Rating

11.7.7 Current Transformer for differential protection


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a. Nos. provided

b. Current Ratio

c. Class

11.7.8 Accessory Terminal Box

a. No. provided

b. Cable glands furnished?

Yes/No.

11.8.0 GROUNDING

No. of grounding pads provided

a. On motor body

b. On terminal box

11.9.0 MISCELLANEOUS

11.9.1 Type of mounting

11.9.2 Overall dimension (LxDxH) mm

11.10.0 MOMENT OF INERTIA (GD2)

a. Stator Kg.m2

kV

b. Rotor Kg.m2

c. Total Kg.m2

11.11.0 WEIGHT

a. Stator Kg

b. Rotor Kg

c. Total Kg

5 Quality and Performance Guarantee

5.1 Manufacture or inspection for cooling towers shall meet national standards and

manufactory standards. The designe of the cooling towers shall be under the

conditions of full design load with stable operation to reduce the loud noise and

vibration.


Page 21 of 25

5.2 Noise of the cooling towers shall satify the interrelated requirements.

5.3 If the cooling tower,withine the period of quality assurance can not meet

performance requirements due to equipments design and manufacture quality

issues,the bidder shall be responsible for solving the problems for free.

5.4 Noise in the place where 1.0m away from the exteriors of the cooling tower shall no

higher than 85 decibel. If the noise exceeds this value,the bidder shall provide

effective measures (devices) to meet the requirements of noise controlling.

5.5 The performance guarantee test will be carried out within 6 months after 14 days

reliability running of unit. The bidder will provides full cooperation for PG test and

comlete the correction for ensure the performance meet the requirement of contract.

6 Limits & interface of design and supply

The bidder shall ensure the whole performance and equipment quality of IDCTs.

The bidder shall provides all the equipments and materials of cooling tower above ±

0.000m elevation except civil work, it includes fillings, water drench devices, Water

decanier, air duct, fans, motors, speed reducer,etc. For the circulation cooling pipe, the

bidder shall provides the CW pipes above +2.000m elevation without isolation valves.

The bidder shall furnish all the installation drawings, civil construction drawings and

calculation books of IDCT as per requirement of design institute (NEPDI), these

drawings should be submitted to design institute (NEPDI) for review and approve, the

final construction drawing of IDCT will be furnished by design institute (NEPDI).

7 Major Technical Parameters Table(to be filled by bidder)

7．1 Physical Dimension of Induced Draft Cooling Tower in Every Section

Plane dimension of cooling tower:

Height of incoming pipe:

Diameter of incoming pipe: 1200mm

Water head needed by incoming pipe:

7．2 Water Quantity and Water Temperature of Mechenical Cooling Tower

（1）Quantity of Cooling Water in Every Group of Cooling Tower: 82454m3/h；

（2）Incoming Water Temperature : ≤ 43℃


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（3）Outgoing Water Temperature: ≤ 33℃

7. 3 Cooling Tower Fan

（1）Model:

（2）Diameter of blade:

（3）Voltage of Supporting Electric Motor:

（4）Power of Supporting Electric Motor:

（5）Efficiency of Supporting Electric Motor:

（6）Vane Number:

（7）Input air:

7．4 Cooling Tower Equipment Major Data Sheet(to be filled by bidder)(to be filled by bidder)(to be filled by bidder)(to be filled by bidder)

No.No.No.No. Item Symbol Unit Parameter Remarks

1 General Design Requirement of Cooling Tower

1-1 Model of Cooling Tower Reverse Flow Induced

draft cooling tower with

Reinforced Concrete

Structure

1-2 Arrangement of Tower Group One unit contains 16

sections with back to

back arrangement 15 for work 1 for standby

1-3 Sets of fan/ one unit 16

1-4 Structural Style of Cooling Tower Reinforced

concrete

1-5 Equipment Spec.& Type

2 Loading conditions of hot water of cooling tower

dry-bulb temperature: 34.5℃ Wet-bulb temperature: 28.6℃ Design relative humidity: 60%

2-1 Design quantity

of general

circulating water Q’ m3/h 82454 For one Unit

2-2

Maximum of

design quantity of cooling tower for

Q m3/h 5497


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No.No.No.No. Item Symbol Unit Parameter Remarks

single tower

2-3 Quantity of cooling tower

—— section 16 15 for work 1 for standby

2-4 Incoming water temperature

t1 ℃ ≤ 43

2-5 Outgoing water

temperature t2 ℃ ≤ 33

3 Technical Parameters of Cooling Tower

3-1 Area of water

drenching of single

tower S m×m

3-2 Air inlet height H1 m

3-3 Water supply height Hb m

3-4 Fill height h m

3-5 Density of water

drenching q m3/(m2·h)

3-6 Diameter of fan Ф mm

3-7 Air input G m3/h

3-8 Type —— ——

3-9 Motor power N kW

3-10 Shaft power of fan

N’ kW s

3-11 Total pressure Δ P Pa

3-12 Efficiency

3-13 Rotated speed r.p.m.

3-14 Relative humidity ψ %

3-15 Air density γ a kg/m3

3-16 Gas water ratio λ ——

3-17 Wind speed of

drenching water

section

V m/s

3-18 Quality wind speed

ga kg/( m2·s)

3-19 Design swap data Ω ——

3-20 Drifting ratio —— %

3-21 Reference noise

of single tower —— dB（A）

3-22 Evaporation loss QE m3/h Quatity of single

tower

3-23 Qualtity of makeup

water QM m3/h

3-24 Use level of

concrete —— m3 Quatity of each

unit

3-25

Inlet piping Diameter

Ф mm 1200


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8 Materials of main components of equipment (filled out by bidder)

No. Component name Material Remarks

1 Air duct FRP

2 Drift Eliminator

3 Filling FRP or PVC

4 Sparge pipe ss

5 Nozzle

6 Fibre glass reinforced plastic filling

shelf

7 Fibre glass reinforced plastic flow

deflecting ring

8 Embeded parts & steel member

9999 Cleaning, PaintingCleaning, PaintingCleaning, PaintingCleaning, Painting,,,, InsulationInsulationInsulationInsulation and Nameand Nameand Nameand Name----plateplateplateplate

9.1 Cleaning

9.1.1 Prior to shipment, equipments shall be cleared.

9.1.2 All the internal objects, such as flitter, iron slag, welding slag, rag and other

impurities shall be removed from components, while the internal water shall be

drained and the equipments shall be sealed properly with a fixed end cover.

9.2 PaintingPaintingPaintingPainting

9.2.1 Bidders shall choose the best way of painting to prevent the equipment from

corrosion during the shipment and storage.

9.2.2 Prior to the shipment, the bidder shall spray the equipment with two layers of primer

and three layers of top coat.

9.2.3 Bidders shall provide complete description of mitigate corrosion, including the

description of cleaning, painting technics and the characteristics of coating.

9.2.4 The surface painting colour code of IDCT will be confirmed by Owner and shall be

complied with by the bidder.

9.3 Name-plate

9. 3.1 The name-plate of the equipment shall be made of stainless steel.

9.3.2 The name-plate shall be installed in a location readily visible to the operators.

9.3.3 The contents of the nameplate shall at least include equipment name, manufacturer

name, manufacture date, factory number, the KKS code of equipment , the number of


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manufacture certificate, equipment model and classification, main parameters of the equipment,

and weight etc, while the contents of nameplate shall be made in Chinese & English

versions.

Annex-2 Attached Drawings

The layout of IDCT units please refer to the attachment.

bidding technical specification of idct 20090727

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