Chiller Plant Efficiency Computation

General InformationBuilding Name

Building Address

Building Type

PE(Mech)

PE(Mech) Address

Chiller Configuration

Operating Cooling Load

Design Chilled Water Supply Temperature

Design Chilled Water Delta T

Design Condenser Supply Water Temperature

Design Condenser Delta T

Design Chilled Water Flow Rate

Design Condenser Water Flow Rate

General Informatione.g. Building ABC

e.g. Blk 25 Jurong Street Singapore 123456

e.g Mix development (Hotel/Retail)

e.g Vince Tan

e.g 2 x 550RT, 1 x 300RT

e.g 810 RT

e.g 6.67 °C

e.g 5.5°C

e.g 29.7°C

FIX/VARIABLE <please choose one>

e.g 60 L/s

e.g 70 L/s

e.g blk 22 Bishan Street, #04-15, Singapore 654321

% Load

CHILLER 1

Evaporator

example 100 700 363 0.519 106.00 6.67 12.22

example 90 630 329 0.522 95.41 6.67 12.22

80 560

70 490

60 420

50 350

40 280

30 210

20 140

10 70

% Load

CHILLER 3

Evaporator

100 500

90 450

80 400

70 350

60 300

50 250

40 200

30 150

Capacity (RT)

Chiller Input Power

(kW)

Chiller Efficiency

kW/RT Flow (L/s)

CHWST (°C)

CHWRT (°C)

Capacity (RT)

Chiller Input Power

(kW)

Chiller Efficiency

kW/RT Flow (L/s)

CHWST (°C)

CHWRT (°C)

20 100

10 50

CHILLER 1

% Load

CHILLER 2

Condenser Evaporator

132.00 29.44 34.53 100 700

119.26 29.44 34.53 90 630

80 560

70 490

60 420

50 350

40 280

30 210

20 140

10 70

CHILLER 3

% Load

CHILLER 4

Condenser Evaporator

100 500

90 450

80 400

70 350

60 300

50 250

40 200

30 150

Capacity (RT)

Chiller Input

Power (kW)

Chiller Efficiency

kW/RTFlow (L/s)

CWST (°C)

CWRT (°C)

Flow (L/s)

Capacity (RT)

Chiller Input

Power (kW)

Chiller Efficiency

kW/RTFlow (L/s)

CWST (°C)

CWRT (°C)

Flow (L/s)

20 100

10 50

CHILLER 2

Evaporator Condenser

CHILLER 4

Evaporator Condenser

CHWST (°C)

CHWRT (°C)

Flow (L/s)

CWST (°C)

CWRT (°C)

CHWST (°C)

CHWRT (°C)

Flow (L/s)

CWST (°C)

CWRT (°C)

% Load

Chilled Water Pump 1

A B C D

example 100 106.01 28 90 80 40.4490 95.41 22.68 94.2 86.8 25.9680 84.81 17.92 90 80 20.7170 74.21 13.72 90 80 13.8760 63.61 10.08 90 80 8.7450 N.A. N.A. N.A. N.A. N.A.40 N.A. N.A. N.A. N.A. N.A.30 N.A. N.A. N.A. N.A. N.A.20 N.A. N.A. N.A. N.A. N.A.10 N.A. N.A. N.A. N.A. N.A.

% Load


A B C D

1009080706050 N.A. N.A. N.A. N.A. N.A.40 N.A. N.A. N.A. N.A. N.A.30 N.A. N.A. N.A. N.A. N.A.20 N.A. N.A. N.A. N.A. N.A.10 N.A. N.A. N.A. N.A. N.A.

E = (A x 1000 x 9.81 x B) / (106 x C x D)

Rated Flow

(L/s)

Rated Head

(m)

Motor Efficiency

(%)

Pump Efficiency

(%)Motor Absorbed Power

(kW)

E = (A x 1000 x 9.81 x B) / (106 x C x D)

Rated Flow

(L/s)

Rated Head

(m)

Motor Efficiency

(%)

Pump Efficiency


(kW)

% Load


A B C D

1009080706050 N.A. N.A. N.A. N.A.40 N.A. N.A. N.A. N.A.30 N.A. N.A. N.A. N.A.20 N.A. N.A. N.A. N.A.10 N.A. N.A. N.A. N.A.

% Load


A B C D


Rated Flow

(L/s)Rated Head

(m)Motor

Efficiency (%)

Pump Efficiency

(%)

Rated Flow

(L/s)Rated Head

(m)Motor

Efficiency (%)

Pump Efficiency

(%)


N.A.N.A.N.A.N.A.N.A.



E = (A x 1000 x 9.81 x B) / (106 x C x D)

Motor Absorbed Power (kW)

E = (A x 1000 x 9.81 x B) / (106 x C x D)


% Load

Condenser Water Pump 1

A B C D

example 100 132.51 32 90 80 57.7790 119.26 25.92 90 80 42.1280 106.01 20.48 90 80 29.5870 92.76 15.68 90 80 19.8260 79.51 11.52 90 80 12.4850 N.A. N.A. N.A. N.A. N.A.40 N.A. N.A. N.A. N.A. N.A.30 N.A. N.A. N.A. N.A. N.A.20 N.A. N.A. N.A. N.A. N.A.10 N.A. N.A. N.A. N.A. N.A.

% Load


A B C D

1009080706050 N.A. N.A. N.A. N.A. N.A.40 N.A. N.A. N.A. N.A. N.A.30 N.A. N.A. N.A. N.A. N.A.20 N.A. N.A. N.A. N.A. N.A.10 N.A. N.A. N.A. N.A. N.A.

E = (A x 1000 x 9.81 x B) / (106 x C x D)

Rated Flow

(L/s)

Rated Head

(m)

Motor Efficiency

(%)

Pump Efficiency


(kW)

E = (A x 1000 x 9.81 x B) / (106 x C x D)

Rated Flow

(L/s)

Rated Head

(m)

Motor Efficiency

(%)

Pump Efficiency


(kW)

% Load


A B C D


% Load


A B C D


Rated Flow

(L/s)Rated Head

(m)Motor

Efficiency (%)

Pump Efficiency

(%)

Rated Flow

(L/s)Rated Head

(m)Motor

Efficiency (%)

Pump Efficiency

(%)





E = (A x 1000 x 9.81 x B) / (106 x C x D)


E = (A x 1000 x 9.81 x B) / (106 x C x D)


Cooling Towers

Parameters Cooling Tower 1 Cooling Tower 2Tower Capacity (RT) 203.7 203.3Tower Capacity (kW) 715 715Number of Fan 1 1Airflow Rate (m3/min) 1164 1164Absorbed Fan Power (kW) 10.82 10.82Total Each Fan Power (kW) 10.82 10.82

Percentage of Load100% (407 RT) 90% (366RT)

Total Capacity (kW) 1430 1430Heat Rejected Load Requred (kW) 1394 1249Number of Tower Operating 2 2Total Full Fan Power (kW) 21.64 24.04Required Capacity for Each Tower 98% 87%Total Airflow Rate (m3/min) 2328 2328Required Airflow Rate (m3/min) 2270 2034Total Fan Power Required (kW) 20.3 17.2

* Based on an ambient DBT 32 °C WBT of 27.5°C

Cooling Tower (Peak Load) - For 341RT chillers Operating CT1 + CT2

Cooling Tower 3 Forced-draft, blow-thru type203.3715

1116410.82 Motor power rating = 15 kW10.82

Percentage of Load80% (326RT)

14301107

227.05 In the absent of detail data, assume fan efficiency drops accordingly to % Load.77%2328180314.3 Provision of VSD set at min of 60% speed

Office A B C D

Time

000001000200030004000500060007000800

example 0900 1200 700 RT x 2 x 90% 626.67 45kW x 2 x 90%10001100120013001400150016001700180019002000210022002300

1200 626.67

Individual equipment efficiency (kW/RT) = 0.52

Retail A B C D

Time

00000100

Cooling Load RT

Operating chiller(s)

Chiller(s) power input

(kW)

Operating Chilled Water

Pump(s)

Total (highlighted,

0900-1800hrs)

Cooling Load RT

Operating chiller(S)


(kW)


Pump(s)

0200030004000500060007000800090010001100120013001400150016001700180019002000210022002300

0.00 0.00

Individual equipment efficiency (kW/RT) = #DIV/0!

Hotel A B C D

Time

0000010002000300040005000600070008000900100011001200

Total (Highlighted,

1000-2200hrs)

Cooling Load RT

Operating chiller(S)


(kW)


Pump(s)

13001400150016001700180019002000210022002300

0.00 0.00

Individual equipment efficiency (kW/RT) = #DIV/0!

Total (Highlighted)

E F G H I J = C + E + G + I

000000000

51.92 55kW x 2 x 90% 84.24 22.5kW x 3 14.58 777.4000000000000000

51.92 84.24 14.58 777.40

0.04 0.07 0.01

E F G H I J = C + E + G + I

00

Chilled water pump(s) power input (kW)

Operating Condenser

Water Pump(s)

Condenser water pump(s) power input

(kW)

Operating Cooling Tower(s)

Cooling Tower(s)

power input (kW)

Total Power Input

(kW)


Operating Condenser

Water Pump(s)


(kW)


Cooling Tower(s)

power input (kW)

Total Power Input

(kW)

0000000000000000000000

0.00 0.00 0.00 0.00

#DIV/0! #DIV/0! #DIV/0!

E F G H I J = C + E + G + I

0000000000000


Operating Condenser

Water Pump(s)


(kW)


Cooling Tower(s)

power input (kW)

Total Power Input

(kW)

00000000000

0.00 0.00 0.00 0.00

#DIV/0! #DIV/0! #DIV/0!

J/A

#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!

0.65#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!

0.65

0.65

J/A

#DIV/0!#DIV/0!

Chiller Plant Efficiency


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#DIV/0!

#DIV/0!

J/A

#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!


#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!

#DIV/0!

#DIV/0!

Chiller Plant Efficiency Computation

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