Water injection pipe

Valve

Rotameter

Hea

d ex

chan

ger

Pump

Cellulose media pad

Water tank

Water sump

Evaporative cooling system

Air cooled condenser

Temperature sensor

Window type A/C

Digital power meter

Pressure gauge

Temperature sensor

Digital Anemometer

Electrical heater

Centrifugal fan Humidifier

Variac

RH sensor

DBT sensor

RH sensor

DBT sensor

Data logger

Axial fan

Variac

40 160

150

140 35

30

25

20

15

10 5

0

130 120

110

100 90

80 70

60 50

40 30

10

10

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75

50

45

40

35

30

25

20

15

10

5

Abs

olut

e hu

mid

ty (g

kg-1

)

With evaporative Without evaporative 45°C 50°C 55°C

RH

(%)

100

90

80

70

60

50

40

30

20

Dry bulb (°C)

100

90

80

70

60

50

40

30

20

50

45

40

35

30

25

20

15

10

5

Abs

olut

e hu

mid

ty (g

kg-1

)

With evaporative Without evaporative

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75

Dry bulb (°C)

RH

(%

)

10

10

10

40 160

150

140

130 120

110

100

60

90 80

70

50 40

20 30

35

30

25

15

20

5 0

1 msec-1 2 msec-1 3 msec-1

50

40

30

20

10 9.0 8.0 7.0 6.0 5.0 4.0

Without evaporative

With evaporative

With evaporative and HE

3.92 bar, -7°C

19.91, 43°C

19.91 bar, 43°C

4 bar, -6°C 4.0 bar, -0.5°C

24.64 bar, 58°C

4.98 bar, 0°C

19.3 bar, 80°C

19.3 bar, 80°C

4.89 bar, 80°C

19.85 bar, 80°C

24.75 bar, 104°C

90 80

(a)

(c) 50

40

30

20

10 9.0 8.0 7.0 6.0 5.0 4.0

(bar

)

5.01 bar, 0.8°C

20.61 bar, 43.3°C 21.41 bar, 46°C

5.2 bar, 2°C

30.4 bar, 71°C

20.7 bar, 82.1°C

5.82 bar, 4.5°C 5.11 bar, 5.2°C

5.67 bar, 15°C

30.6 bar, 119°C

21.6 bar, 84.8°C

4.93 bar, 3.8°C

140 160 180 200 220 240 260 280 300 320 340 360 390 400 420 440 460 480 500 520 540 560

KJ kg-1

(bar

)

50

40

30

20

10 9.0 8.0 7.0 6.0 5.0 4.0

(b)

4.61 bar, -1.7°C

4.86 bar, -1°C

19.63 bar, 41.3°C

19.91 bar, 43°C

19.7 bar, 81.2°C

5.47 bar, 2.5°C

20.06 bar, 83.7°C

27.21 bar, 62°C 27.98 bar, 113°C

5.3 bar, 11.5°C 4.75 bar, 3°C 4.6 bar, 1.6°C