cooling towers project

8/6/2019 Cooling Towers Project

1/25

PERFORMANCE STUDY & ENHANCEMENT OFPERFORMANCE STUDY & ENHANCEMENT OF

COOLING TOWER (PH#1)COOLING TOWER (PH#1)

2*70 MW POWER PLANT2*70 MW POWER PLANTProject WorkProject Work

byby

ABHISHEK SRIVASTAVAABHISHEK SRIVASTAVA

ANKUSH TOMARANKUSH TOMAR

DEEP CHATTERJEEDEEP CHATTERJEE

NITIN PANDEYNITIN PANDEY

PROJECT GUIDEPROJECT GUIDEM.R.L. SHARMA(M.R.L. SHARMA(SR.MANAGERSR.MANAGER)

JINDAL STEEL & POWER LIMITED (C.G.)JINDAL STEEL & POWER LIMITED (C.G.)


2/25

CONTENTCONTENT

PROJECT OBJECTIVE

ABOUT COOLING TOWER

STUDY OF DESIGN PARAMETER

DATA COLLECTION & ANALYSIS

COOLING TOWER LOSS STUDY

OVERALL


3/25

Project ObjectiveProject Objective

To meet design efficiency by applyingTo meet design efficiency by applying

necessary and corrective measures.necessary and corrective measures.


4/25

COOLING TOWERSCOOLING TOWERS


5/25

COMPONENTS OF A COOLINGCOMPONENTS OF A COOLING

TOWERTOWER

CCooling tower supplied, erected & commissioned

by Paharpur cooling tower in the year 2001

Frame and casing : RCC built counter flow coolingFrame and casing : RCC built counter flow coolingtowertower

FillFill : PVC: PVC

Drift eliminators : PlasticsDrift eliminators : Plastics

Nozzles : PVCNozzles : PVC

FansFans : Glass reinforced polyester: Glass reinforced polyester


6/25

COMPONENTS MAKECOMPONENTS MAKE

COMPONENTS : MAKERS

GEAR BOX : GEARREDUCER - SERIES 36 & 38 FAN MOTOR : KIRLOSKAR

FAN : MARLEY COOLING TOWER CO.


7/25

CT-MOTOR

CT-FAN

FILLS


8/25

Hot water enters at the top

Air enters at the bottom and exits at the top

Uses induced draft fan/s

Induced Draft Counter Flow CT


9/25

STUDY OF DESIGNPARAMETERS


10/25

MEASURED PARAMETERS

Wet bulb temperature of air

Dry bulb temperature of air

Cooling tower inlet water temperature

Cooling tower outlet water temperature

Water flow rate


11/25

PERFORMANCE PARAMETERS

1. Range

2. Approach

3. Effectiveness

4. Evaporation

5. Cycles of concentration

6. Blow down


12/25

1. RANGE

Difference between

cooling water inlet

and outlet

temperature:

Range (C) = CW

inlet temp CW outlettemp

Ran

ge

Approach

Hot Water Temperature (In)

Cold Water Temperature (Out)

Wet Bulb Temperature (Ambient)

(In) to the Tower(Out) from the Tower


13/25

2. APPROACH

Difference between

cooling tower outlet cold

water temperature and

ambient wet bulb

temperature:

Approach (C) =

CW outlet temp Wetbulb temp

Range

Appro

ac

h

Hot Water Temperature (In)

Cold Water Temperature (Out)

Wet Bulb Temperature (Ambient)

(In) to the Tower

(Out) from theTower


14/25

3. EFFECTIVENESS

Effectiveness in %

= Range / (Range + Approach)

= (CW in temp CW out temp) X 100

(CW in temp Wet bulb temp)


15/25

4. EVAPORATION

Water quantity (m3/hr) evaporated for cooling.

= theoretically, 1.8 m3 for every 10,000,000 kcal

heat rejected. (approx. value as the evaporationvaries according to the atmospheric condition)

= 0.00085 x 1.8 x circulation rate (m3/hr)x (T1-T2)

T1-T2 = Temp. difference between inlet and

outlet water


16/25

5. CYCLES OF CONCENTRATION

(C.O.C.)Ratio of dissolved solids in circulating water to the

dissolved solids in make up water

6. BLOW DOWN

Evaporation Loss

=

(C.O.C. 1)


17/25

Data Collection


18/25

COOLING TOWER LOSSES STUDY

COOLING TOWER LOSSES STUDY


19/25

COOLING TOWER RANGE = 8.60

COOLING TOWER APPROACH = 5.90

COOLING TOWER EFFICTIVENESS (%)

RANGE/ (RANGE+APPROACH)x1008.6/(8.6+5.90) x100

59.30

RATED COOLING TOWER EFFICTIVENESS (%)

RANGE/ (RANGE+APPROACH) x100

10/(10+4) x100

71.42


20/25

EVAPORATION IN M3/Hr

0.00085x1.8x CIRCULATION RATE(m3/h)x(O/L-I/L)0.00085 x1.8 x12000 x8.60

158 m3/hr

DESIGN EVAPORATION IN M3

/Hr

0.00085x1.8x CIR. RATE (m3/hr)x(O/L-I/L)

0.00085 x1.8 x 13300 x 10 = 203.49 m3/hr


21/25

BLOW DOWN (ACTUAL ON FORMULA BASIS)

EVAPORATION LOSS/(C.O.C.-1)

158/(6.66-1) =27.9 M3/Hr

DESIGN BLOW DOWN

203.49/(10-1) = 22.95 M3/Hr

BLOWDOWN IS SLIGHTLY MORE THAN DESIGNVALUE

MAKE UP WATER REQUIRED

EVAPORATION LOSS + BLOW DOWN LOSS158 + 27.90 =185.9 M3/Hr


22/25

OBSERVATIONS:

LESS EVAPORATION THAN DESIGN VALUE

1. LACK OF COOLING HENCE AFFECTING THE

RANGE.

2. LESS AIR FLOW THAN REQUIRED.3. BLOCKED SPRAY NOZZLES.

4. SCALING / FOULING ON FILL PACKS.


23/25

HIGHER BLOW DOWN THAN DESIGN VALUE

1. WORKING PERSONNEL TAKING WATERFROM COOLING TOWER SUMP FOR FILTER

BACKWASH

2. SOMETIME TO MAINTAIN THE REQUIRED WATERCHEMISTRY & PH MORE BLOWDOWN REQUIRED


24/25

OVERALL.

(1) PERIODICAL CHECKING AND CLEANING OF ALLSPARY NOZZLES.

(2) OPTIMISE COOLING TOWER BLADE ANGLE ON

SEASONAL AND LOAD BASIS.

(3) DEFECTIVE DRIFT ELIMINATOR REPLACEMENT.(4) DAMAGED COATED FILL PACK REPLACEMENT.

(5) CONSIDERATION SHOULD BE TAKEN IN ORDER TO

MAINTAIN BALANCE BETWEEN AUXILLARY POWER

COMSUMPTION & COOLING WATER

TEMPERATURE.

(6) MAINTAING WATER QUALITY PARAMETERS

STRINGENTLY THERE BY MINIMIZING BLOWDOWN


25/25

THANKSTHANKS

cooling towers project

Documents