Upload
henhuang
View
230
Download
3
Embed Size (px)
Citation preview
8/2/2019 2.Hydronic System
1/17
HYDRONIC SYSTEMJ.ILANGUMARAN
8/2/2019 2.Hydronic System
2/17
6"
10"5"
5"
10"5"5"
CONDENSER
10"
10"
5"5"
P.S.
P.S.
6"
5"5"
5"5"
10"
CONDENSER
CONDENSER
5"
5"10"
10"
5"
5"
CONDENSER WATER PUMPS
( ONE STAND BY )
HYDRONIC SYSTEM
8/2/2019 2.Hydronic System
3/17
HYDRONIC SYSTEM - BASIC COMPONENTS
LOAD HEATSOURCE HEAT
* CHILLERS
* HOT WATER
TERMINAL UNITS
*
EXPANSION
CHAMBER PUMPS
* SOURCE * LOAD * PUMP
* DISTRIBUTION SYSTEM ( PIPING NETWORK )
* EXPANSION CHAMBER
GENERATORS * F.C.U.
. . .
DISTRIBUTION SYSTEM
8/2/2019 2.Hydronic System
4/17
WATER IS USED TO CARRY HEAT FROM POINT OF
GENERATION SUCH AS COOLING / HEATING COIL TO APOINT WHERE IT CAN BE REJECTED SUCH AS
REFERIGERANT MACHINE & HOT WATER GENERATOR
COOLING & DEHUMIDIFICATION
COMPRESSOR
CHILLING MACHINE
COIL-CHW
AIR FLOW
WATER RETURN
45F CHILLED WATER SUPPLY
CONDENSOR
TO SPACE
55F CHILLED
WATER PIPE LINES
HEAT REJECTED TO
REFRIGERANT
ie. AT COOLER
* AHU'S
* FCU'S
TERMINAL UNITS
WATER & AIR
BETWEEN CHILLED
HEAT EXCHANGE
8/2/2019 2.Hydronic System
5/17
AIR FLOW
TO SPACE
HOT WATER SUPPLY
HEATING COIL
HOT WATER SUPPLY
HEATING - HOT WATER & COIL
HOT WATER RETURN PIPE
HOT WATERGENERATOR 100F
ELECTRIC HEATERS
HEAT REJECTED TO HEAT EXCHANGE
BETWEEN HOT
WATER & AIR
TERMINAL UNITS* AHU'S * FCU'S
8/2/2019 2.Hydronic System
6/17
CONDENSOR
COMPRESSOR
COOLING
TOWER
WATER RETURN
CHILLING MACHINE
AIR OUT
AIR IN CONDENSOR
WATER IS USED TO CONDENSE THE REFERIGERANT TOLIQUID. IT THUS TRANSPORTS THE HEAT OF
CONDENSATION TO COOLING TOWER FOR REJECTION
TO ATMOSPHERE
WATER PIPE LINES
HEAT OF REFRIGERANT
CONDENSATION REJECTED
TO COOLING TOWER
ie. ATMOSPHERE
HEAT TRANSFER
BETWEEN REFRIGERANT
AND WATER
WATER SUPPLY
8/2/2019 2.Hydronic System
7/17
WATER IS USED ASA CARRIER OF HEAT,
IT IS THE COOLANT
OR COOLINGMEDIUM.
IT TRANSPORTS THE
BLOCK A
MECHANICAL
PLANT ROOM
HIGH SIDE
LOW SIDE
CHILLED WATER
F.C.U.
RETURN
CHILLED WATER
SUPPLY
F.C.U.
F.C.U.
F.C.U.
F.C.U.
F.C.U.
F.C.U.
F.C.U.
F.C.U.
F.C.U.
DISTRIBUTION NETWORK
SOURCE -
GENERATION OF
COOLING/HEATING
SPACE HEAT TOCHILLING MACHINE.
WATER IS A
SECONDARYREFERIGERANT
BLOCK D
BLOCK B
BLOCK C
L
L
L
DISTRIBUTION NETWORK
AHU
AHU
AHU
F.C.U.
F.C.U.
F.C.U.
F.C.U.
F.C.U.
F.C.U.
8/2/2019 2.Hydronic System
8/17
CHILLER FLOW RATE
HEAT CARRYING CAPACITY OF PIPING
Q = MASS FLOW RATE x SP. HEAT x TEMP.
RANGEQ BTU/HR = GALLONS/MINUTE x 8.33
POUND/GALLON x 60 x 1 x T0 F
= GALLON/MINUTE x 500 x
T0
F T0 F = BTU/HR PER GPM, FLOW RATE
8 = 4000 3.0 GPM / TR.
10 = 5000
2.4 GPM / TR.15 = 7500
20 = 10,000
8/2/2019 2.Hydronic System
9/17
STATIC HS = STATIC HD
THERE IS NO UNBALANCED
STATIC HEAD.
EVEN WHEN PUMP IS NOT IN
OPERATION, THE ENTIRE
PIPING IS FILLED WITH
WATER
ATMOSPHERIC
PRESSURE
EXPANSION
TANK
CHILLED WATER
CLOSED RECIRCULATING TYPE
THE PRESSURE AT THEHIGHEST POINT =
SYSTEM PRESSURE + STATIC
HEIGHT & LIQUID
(EXPANSION TANK WATER
LEVEL )
COOLER
RETURN
WATER
44F
SUPPLY
PUMP
TERMINAL
UNITS
54F
CHILLED
8/2/2019 2.Hydronic System
10/17
AHU / FCU
AHU / FCU
AHU / FCU
B
C
D
G
F
E
10 FT
10 FT
10 FT
10 FT
10 FT
DIRECT RETURN
COOLERA H
40 FT
PUMP
PARALLEL PATHS- A-B-G-H ( 100 FT. ) SHORTEST PATH
- A-B-C-F-G-H (120 FT.)
- A-B-C-D-E-F-G-H ( 140 FT. ) LONGEST PATH
8/2/2019 2.Hydronic System
11/17
SEAMLESS IS EXPENSIVE & HENCE NOT USED
GENERALLY FOR HVAC SYSTEM
FOR CHILLED & CONDENSER WATER PIPING
ERW CLASS -C PIPES ARE USED
CLASS A IS NEVER USED
FOR DRAINS ERW CLASS B GI PIPE IS USED
8/2/2019 2.Hydronic System
12/17
CONTROL VALVES
CONTROL VALVES ARE USED ACROSS THE
COOLING / HEATING COILS FOR VARYING
WATER FLOW IN RESPONSE TO CHANGINGLOAD.
-
3 WAY MOTORISED - DIVERTING
2 WAY MOTORISED
3 WAY VALVES ARE USED FOR CONSTANTPUMPING SYSTEM, WHILE 2 WAY VALVES ARE
USED FOR VARIABLE PUMPING SYSTEM.
8/2/2019 2.Hydronic System
13/17
3 WAY MOTORISED MIXING VALVE
COIL
AB A
B
CHW / HOT
WATER INCHW / HOT
MOSTLY USED IN RETURN LINE OF COOLING /
HEATING COILS. THERE ARE TWO INLETS AND ONE
OUTLET. THE PORT DESIGN IS SUCH THAT IT
CANNOT BE USED IN PLACE OF DIVERTING VALVE.
FLOW VARIES THROUGH THE COIL. THE TOTAL
FLOW REMAINS REMAINS SAME.
8/2/2019 2.Hydronic System
14/17
3 WAY MOTORISED DIVERTING VALVE
COIL
AB A
B
CHW / HOT
WATER IN
THERE IS ONE INLET AND TWO OUTLETS. THE
PORT DESIGN IS SUCH THAT IT CAN BE USED IN
PLACE OF MIXING VALVE. DIVERTING VALVES
ARE EXPENSIVE AND ARE NOT COMMONLY
USED.
WATER OUTCHW / HOT
8/2/2019 2.Hydronic System
15/17
CHILLER4"4"
8" 4"4"
8"
4"
4"
EXPAN.TANK
4"
AHU4000 CFM 4000 CFMAHU 4000 CFMAHU
8"8"
"
8"8"
CHILLED WATER FLOW DIAGRAM
CHILLER
CHILLER
8"
4"
4"
4"4"8"
8"
4"
FLOW RATE / MACHINE = 1226 LPM
=WATER TEMPERATURE IN 53F ( 11.6 C )
=WATER TEMPERATURE OUT 45F ( 7.2C )
4"
( ONE STAND BY )
3 NOS. CHILLED WATER PUMP
8/2/2019 2.Hydronic System
16/17
6"
10"5"
5"
""5"
CONDENSER
10"
5"5"
P.S.
P.S.
6"
CONDENSER WATER FLOW DIAGRAM
5"5"
5"5"
10"
CONDENSER
CONDENSER
5"
5"10"
10"
5"
5"
CONDENSER WATER PUMPS
( ONE STAND BY )
8/2/2019 2.Hydronic System
17/17
END