REPORT ON HVAC
CHILLERS,HOODS,DUCTS,
LOAD CALCULATIONS,
CLEANING & INSTALLING PROCESS.
BY J.JOHN VINEETHKAR.
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CARRIER PRO LOG DIGITAL KEY-PAD
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SIDE VIEW OF CARRIED A/C PLANT
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Chiller
Condenser with copper coils
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Compressor
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AHU
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Cool water inlet to condensor
Cool water
outlet to chiller
Water outlet
Water inlet
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CHILLER PLANT
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DE-SCALING (CLEANING) OF CONDESER COILS
&REPARING OF RUSTED COOL WATER INLET PIPE
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Salts of magnesium and calcium will form as obstacle & results in poor flow of water
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Copper tubes where salts will form a layer & minimize the flow & speed of water circulation.
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ScaleBreak liquid descaler quickly and safely removes lime scale, rust and other contaminants from the walls of tubes to quickly restore heat exchange properties.
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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.
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After cleaning with HCL(HYDRO CHLORIC ACID) dusted water flowing out
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Changing of chiller plant inlet pipe-line.
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OXY-ACYTELYENE
welding appratus
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through OXY-ACYTELYENE welding process amputation of rusted pipe.
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DE-SCALING OF CONDENSER IN AIR HANDLING UNIT(AHU) ’S
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SPRAYING OF SHINE SHINE - HCL(HYDRO CHLORIC ACID) FOR REMOVEL OF DUST ALLOCATED in between fins.
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SPRAY OF HYDRO CHLORIC ACID
FINS
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After cleaing with HYDR
O CHLOR
IC ACID
Dusted fins
before cleaning
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AFTER CLAENING OF AHU’S FINS
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FIRE FIGHTING INSTALLATIONS
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Monitar
Butterfly Valve
3” dia hole
Can spray water upto 50 feet height
diameter of 1.5”
handle
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Lever used to free & change the direction
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Installing of BUTTERFLY
VALVE
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Identity Valve
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Identity Valve
4-way FBI
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KITCHEN HOOD LAYOUT
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COOLER PALNT
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Duct fixed on cooler
Cooler(takes hot air from surrounding and releases cool air
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Cool air
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HOOD CLEANING
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DURING USAGE OF HOODS,CONTAMINANTS LIKE OILS WILL FORM A LAYER ON LOWER SPACE OF HOODS AND RESULTS IN POOR FLOW
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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
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CALCULATION SECTION
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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
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