8/14/2019 Air 2/2549

1/11

1

1 (Air conditioning/Refrigeration) 2/2549

1. 30

( 2 60 )1.1 Cooling Tower (Blow Down)

. . . .

1.2 Cooling Tower

. 0.3% . 1% . 2-3% . 15%

1.3 HEPA FILTER.

. . .

1.4 (Fire Damper) . . . .

1.5 (Leaving Evaporator Coil Temperature) . 9 . 12 . 14 . 20

8/14/2019 Air 2/2549

2/11

2

1 (Air conditioning/Refrigeration) 2/2549

1.6 (Chiller) 1,500

7 12 . 1,200 GPM. 2,400 GPM. 3,600 GPM. 4,800 GPM

1.7 5000 CFM . 1900 x 250 mm

. 1000 x 400 mm. 1500 x 300 mm. 1000 x 350 mm

1.8 Backward Curve . Static Pressure 50 mm Non-Overload. Static Pressure 50 mm Non-Overload. Backward Curve Centrifugal Fan

.

1.9 Cooling Coil (Row) (Fin per Inch-fpi) . 2 Rows 10 fpi. 3 Rows 10 fpi. 3 Rows 12 fpi

. 4 Rows 14 fpi1.10 High side R-22

. 200 psig. 220 psig. 260 psig. 300 psig

8/14/2019 Air 2/2549

3/11

3

1 (Air conditioning/Refrigeration) 2/2549

1.11 1 SE SW

. 150 w. 250 w. 350 w. 450 w

1.12 30

. 1000 . 1700 . 2000 . 2500

1.13 800 CFM . 18 x 18 . 12 x 12

. 20 x 20 . 16 x 16

1.14 5000 CFM . 30 x 30 . 30 x 40 . 30 x 50 . 30 x 60

1.15 (Automatic Control Valve) . . . .

8/14/2019 Air 2/2549

4/11

4

1 (Air conditioning/Refrigeration) 2/2549

1.16

. . . .

1.17 4 EER. 7.6. 8.6

. 9.6. 10.6

1.18 . . . .

1.19 (Cooling Tower) . . . .

1.20 . HEPA. 15 . (Outdoor Air) 5 .

1.21 . . HEPA . 15 . (Outdoor Air) 15%

8/14/2019 Air 2/2549

5/11

5

1 (Air conditioning/Refrigeration) 2/2549

1.22 33 ...

. 15 , 2,000 . 23 , 2,000 . 15 , 10,000 . 23 , 10,000

1.23 33 ... . 50 . 2 . . 1 30

1.24 33 ... . 1 . 6

. 40 . 80%

1.25 ... . 10,000 . 500 . 1,175 kVA . .. 2538

8/14/2019 Air 2/2549

6/11

6

1 (Air conditioning/Refrigeration) 2/2549

1.26 ...

(Hood) . 2 . 2 . 9 . 4

1.27 ...

. . . .

1.28 33 ...

. 200 25 . 200 15 . 200 2.5 . 200 3

1.29 33 ... 100 2.5 . 200 . 400 . 1,000 . 2,000

8/14/2019 Air 2/2549

7/11

7

1 (Air conditioning/Refrigeration) 2/2549

1.30 ...

. 1 3

. 1 3 50 . 1 3 . 1 3 2

2. 10 ( 2 20 ) ()2.1 () R-22

. (Subcooled /Compressed Liquid).

. .

2.2 30oC 283 oC (COP) ?. 0.032 . 0.904. 0.032 .

2.3 R-22 40 oC

2000 kPa 110 kPa ?. 50 oC . 40 oC. 30 oC . 20 oC

2.4 (Vapor Compression Refrigeration) (IdealCycle) (Evaporator) 1 2 3 4 QL = kW QH = kW WC= kW

8/14/2019 Air 2/2549

8/11

8

1 (Air conditioning/Refrigeration) 2/2549

. QL = (h1 h4)

. WC= QL(h2 h1) / (h1 h4). COP = (h2 h3)/(h2 h1). QH = h2 h3

2.5 (Vapor Compression Refrigeration ) . 30OC

(Condensing Temperature) 50OC (COP)

(Condensing Temperature) 40OC

. 20OC (EvaporatingTemperature) 15OC 25OC (COP)

. 20OC (EvaporatingTemperature) 30OC (COP) (Evaporating Temperature) 25OC

. 20OC (EvaporatingTemperature) 25

OC (COP) (Evaporating Temperature) 30OC

2.6 Thermostatic Expansion Valve . (Evaporator)

(Degree of Superheat) . (Evaporator)

. .

25% 25%2.7

. R-12 . R-22. R-123 .

2.8 (Ideal Vapor Compression Refrigeration Cycle) 1 (Evaporator) 2 ,3 4

8/14/2019 Air 2/2549

9/11

9

1 (Air conditioning/Refrigeration) 2/2549

T = oC, P = kPa, v = m3/kg, h = , kJ/kg, s =

kJ/(kg.K) , V m3/s, m = kg/s, QL = kW, QH = kW , WC=kW , COP = . V = m / v1 . WC = m(h2 h1). QL = h1 h3 . COP = m(h1 h3)/(h2 h1)

2.9 20OC 20OC 20OC 1

30OC 18

OC (kW.h -) ?. 10% . 10%. 4% . 4%

2.10 (Ideal Vapor Compression Refrigeration Cycle) 1 (Evaporator) 2 ,3 4 T =

oC, P = kPa, v = m3/kg, h = , kJ/kg,

s = kJ/(kg.K) ,V= m3/s, m = kg/s A h1 = 220 kJ/kg , h4 = 90 kJ/kg , v1= 0.5 m3/kg, v4 = 0.001 m3/kg B h1 = 430 kJ/kg , h4 = 300 kJ/kg , v1= 0.05 m3/kg, v4 = 0.002 m3/kg C h1 = 360 kJ/kg , h4 = 260 kJ/kg , v1= 0.6 m3/kg, v4 = 0.001 m3/kg. A . B

. C . h2

3. P-v P-h

sub-cooled liquid superheated vapor

(10 )

8/14/2019 Air 2/2549

10/11

10

1 (Air conditioning/Refrigeration) 2/2549

4. 134a 0.14MPa -10C

0.05 kg/s 0.8 MPa 50

C 26C 0.72MPa Expansion valve throttling 0.15 MPa (10 )) ) ) COP EER

8/14/2019 Air 2/2549

11/11

11

1 (Air conditioning/Refrigeration) 2/2549

Condenser

Compressor

Evaporator

Exp.Valve

h = 286.69 kJ/kghs = 284.21 kJ/kg

h = 246.36 kJ/kgs = 0.9724 kJ/kg-K

h

=

87.8

3

kJ/k