Evaporation Pond Sizing (verified) 3c2gi

EVAPORATION POND SIZING CALCULATION COMPANY: PROJECT: TAG NUMBER: SERVICEC:

1. Objective The objective of this calculations is to estimate the dimensions of evaporation pond. 2. Basis & Assumptions 1) It is considered that treated waste water from oil/water separator (58-T-01) is to be transferred to evaporation pond for disposal. 2) 200x 1.2 (design margin) BPD of continous flowrate is considered for evaporation pond sizing. 3) For better estimation two seasons are considered . a) Summer season is considered from Apil- September b) Winter is considered from October- March 4) Metrological data is taken from Pakistan Metrolgical Deparatment KOHAT station. Refer Annexure-1 for metrological data 5) Evaporation pond shall be designed such that it should not overflow in any climatic condition during the operating period 6) It is assumed that there is 10000 ppm TDS in the feed. 7) It is assumed that 10000 TDS of water generally produces 0.03 ft3 of solids per barrel. 8)

ThePenPan equation is used to get evaporation rate

• The of this equation are: – E0

=

F – R

Evaporation rate (mm/day) =

A factor that s for the change in air density with changes in elevation

=

Solar irradiance (W/m 2)

=

Mean dew point temperature (°C)

s

– T

Rs = 10.8 * Tm + 153

D

– T

=

Mean daily temperature (°C)

m

– u

=

Wind velocity at 2 meters above surface (m/s)

– z

=

Elevation above sea level (m)

F = 1.0 − 1.7 ×10−5 * z

EVAPORATION POND SIZING CALCULATION COMPANY: PROJECT: TAG NUMBER: SERVICEC:

Input

S.NO.

Unit

Summer

Mean Temp

Winter

1

Relative Humidity

%

68.6

73.5

78.5

2

Mean Dew Point Temperature

°C

18.152

12.9

7.7

3

Mean Daily Temperature

°C

24.416

17.858

11.3

4

Wind Velocity

m/s

2.69

2.525

2.36

5

Elevation Above Sea Level

m

510

510

510

6

Produced Water Flow

BPD

200

200

200

7

TDS of produced water

PPM

53000

53000

53000

Calculated

8 9

F Factor

10

Solar irradiance

11

Evaporation Rate

12

Area of Evaporation Pond Required

14 15 16 17 18 19 20 21

Length of evaporation pond

Width of evaporation pond Volume of accumulated solids Height for accumulated solids Height for Prouced Water Holdup

22

0.991

0.991

0.991

W/m²

416.6928

345.8664

275.04

mm/day

43.3

32.9

23.0

m²

734

966

1383

m

17.5

17.5

17.5

ft

57

57

57

m

80

80

80

ft

262

262

262

m³

329

329

329

m

0.2

0.2

0.2

ft

1

1

1

ft

0

0

-0.0010

mm

86

65.125

44.25

m

0.086

0.065125

0.04425

24

ft

0.28

0.21

0.15

25

m

0.63

0.60

1

ft

2.05

1.98

1.92

m2

1400

1400

1400

23

26 27 28

Rainfall

Total Height

Area Calcualted