REPORT ON HVAC

CHILLERS,HOODS,DUCTS,

LOAD CALCULATIONS,

CLEANING & INSTALLING PROCESS.

BY J.JOHN VINEETHKAR.

2

CARRIER PRO LOG DIGITAL KEY-PAD

3

SIDE VIEW OF CARRIED A/C PLANT

4

Chiller

Condenser with copper coils

5

Compressor

6

AHU

7

Cool water inlet to condensor

Cool water

outlet to chiller

Water outlet

Water inlet

8

9

CHILLER PLANT

10

DE-SCALING (CLEANING) OF CONDESER COILS

&REPARING OF RUSTED COOL WATER INLET PIPE

11

Salts of magnesium and calcium will form as obstacle & results in poor flow of water

12

Copper tubes where salts will form a layer & minimize the flow & speed of water circulation.

13

14

ScaleBreak liquid descaler quickly and safely removes lime scale, rust and other contaminants from the walls of tubes to quickly restore heat exchange properties.

15

Hydrochloric acid is a clear, colorless,

highly pungent solution of hydrogen chloride in water.

It is a highly corrosive, strong mineral  acid with many

industrial uses.

 Hydrochloric acid is found naturally in gastric acid.

Will be using for the descaling process for removal of

scales and scars effectively.

16

After cleaning with HCL(HYDRO CHLORIC ACID) dusted water flowing out

17

Changing of chiller plant inlet pipe-line.

18

OXY-ACYTELYENE

welding appratus

19

through OXY-ACYTELYENE welding process amputation of rusted pipe.

20

21

22

23

24

DE-SCALING OF CONDENSER IN AIR HANDLING UNIT(AHU) ’S

25

SPRAYING OF SHINE SHINE - HCL(HYDRO CHLORIC ACID) FOR REMOVEL OF DUST ALLOCATED in between fins.

26

SPRAY OF HYDRO CHLORIC ACID

FINS

27

28

29

After cleaing with HYDR

O CHLOR

IC ACID

Dusted fins

before cleaning

30

31

AFTER CLAENING OF AHU’S FINS

32

FIRE FIGHTING INSTALLATIONS

33

Monitar

Butterfly Valve

3” dia hole

Can spray water upto 50 feet height

diameter of 1.5”

handle

34

Lever used to free & change the direction

35

36

37

Installing of BUTTERFLY

VALVE

38

39

40

Identity Valve

41

Identity Valve

4-way FBI

42

KITCHEN HOOD LAYOUT

43

44

45

46

47

48

49

50

COOLER PALNT

51

52

53

Duct fixed on cooler

Cooler(takes hot air from surrounding and releases cool air

54

55

Cool air

56

HOOD CLEANING

57

DURING USAGE OF HOODS,CONTAMINANTS LIKE OILS WILL FORM A LAYER ON LOWER SPACE OF HOODS AND RESULTS IN POOR FLOW

58

59

60

AFTER CLEANING OF OIL.When oil is formed a layer on ducts or hoods which are made with hard metal that are should be burn .Results in total removal of oil

61

CALCULATION SECTION

62

Chiller capacity formula & calculation...

First of all lets use SI units.

Q = M x Cp X DT

Q = Capacity in kWM = Liquid mass flow rate kg/sCp = Liquid specific heat kJ/kg.KDT = Liquid temperature difference °C

Your mass flow rate is 0.166 kg/s 

Q = 0.166 x 4.18 x (37-15) = 15.2 kW

You have to select a compressor which can give you 15.2 kW capacity at =3°C evaporating and 50°C condensing (if air cooled) 

NOW in actual life you can not have 37°C input water into the chiller all the time. Normal water chiller when starts, the entering water is warm say 35°C but after a little while the temperature goes down and chiller works perfectly.

If entering temperature into the chiller is warm all the time then entering refrigerant will evaporate very quickly and suction pressure will be high. IOW your chiller will not work correctly.Normal chiller is designed for 12°C to 7°C.

GPM is gallons per minute

63

64

65

66

67

68

69