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8/10/2019 Daikin Presentation -VRV Technology
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Muralidhar Katari
Daikin Air conditioning India Pvt. Ltd.
October 30, 2014
Energy Efficiency Summit
HyderabadLatest developments in VRV
Technology
1
2
What About Efficiency?
Typical energy consumption in office building
Air
Conditioning
47%
Comp.
20%Heat
transfer
27.2%
Other utilities
20.5%
Lighting
32.3%
AC consumption reduction is
prime target of energy
saving
47% of electricity is
consumed by AC
How does it possible to achieve energy saving and
comfort simultaneously?
Energy saving Comfort
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This is the time to increase our efforts towards
Strengthen Green Building Movement
More energy efficient methods of operations
High energy efficient products
Habit of Energy Conservation
Best utilization of available Energy Resources.
We are pioneering the movement with a large array of
energy efficient products
Central Controller
Project Name
Location
BLD. Type
Size of Project
The Size of Bldg
Uniqueness
CRISIL House
Mumbai, India
Official Building
9 Floors
ODU - 73 No., HP1,092VRVIII (Air Cooled)
I-Manager
Green building project =>With Platinum rating
Design by Team of
leading Architectural andHVAC Consultancy
organisations.
LEED certifiedPlatinum rating
Air-cooled VRV Project withLEED Platinum Certification
4
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Water-cooled VRVProject withLEED Platinum Certification
LEED certifiedPlatinum rating
Project Name
Location
BLD. Type
Size of Project
Central Controller
The Size of Bldg
Uniqueness
Suzlon
Pune, India
Official Building
8Blocks, 32 Floor
ODU - 134 No., HP1,392
VRVIII ( WC)
I-Manager & BACnet
Green building project =>Highest Platinum ratedbuilding in India
Appreciation letter fromcustomer for installation
and project management
5
LEED Platinum Certification
Kirloskar Brother Limited
Pune, India
Official Building
ODU - 69 No., HP704
Green building project =>Platinum rated building
1stReference Site of VRVWIII Awarded appreciation letter by
customer
G+ 3 Floor
Project Name
Location
BLD. Type
Aircond. Qty
Application
The Size of Bldg
LEED certifiedPlatinum rating
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Discussion Topics
7
Energy & Atmosphere
- Efficiency of the system
- Environment friendly Refrigerant
Clean Project Management
-IAQ management plan
-Indoor environmental quality
Emerging Space conditioning technology;Variable Refrigerant Volume (VRV)
VRV Development
8
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9
Background of Development of VRV
1973Global oil crises (The 4th Arab-Israel War )
1979New energy efficiency laws passes in Japan
1980Chiller design engineers challenged with
making a higher efficiency chiller
1982The worlds first VRV System is launched
19741973
Crudeoilprice
Oil crisis
Energy saving
9
The 1st turning point
Inverter VRV!
Its design flexibility expanded sales volume
drastically.
0
1000
2000
3000
4000
5000
1998 1999 1990 1991
The 1stgeneration Inverter VRV G series
Non-inverter
VRV
Inverter VRV
Turning
Point10
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Technology Advancement
11
Standard compressors to variable speed scroll compressors
Direct driven outdoor fans to variable frequency drive,inverter-driven fans
Direct driven indoor coil motors to Inverter type motors
Performance difference between
1982 and 2014 model
1982 2014Energy Efficiency (COP) 2.78 4.30
Max. refrigerant piping length
difference between indoor &outdoor unit
70m 165m
Max. refrigerant piping height
difference between indoor &outdoor unit
30m 90m
Capacity rangeOutdoor unit 1015HP 4~60HP
Capacity rangeIndoor unit 2.5HP 0.8~20HP
Max. connectable indoor unitsnumber
6 units 64 units
Network control system None
-Intelligent touch Controller
-Intelligent Manager
-Intelligent touch Manager (~2012)
-BACNet interface
-LonWorks Interface
-Home Automation Interface (2012~)
- A/C Network Service System
Target project size Approx. 5,000m2 No limit
12
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Expansion of the country of sale
Sales is undergoing in more than 70 countries
ustria
Belgium
Bulgaria
Croatia
Cyprus
Czech
Finland
France
Germany
Greece
Serbia
Slovakia
Spain
Sweden
Switzerland
Turkey
UK
Ukraine
Hungary
Ireland
Italy
Lithuania
Macedonia
Netherlands
Poland
Portugal
Romania
Russia
lgeria
Burkina
Fas
o
Egypt
Ivory Coast
Senegal
South frica
Sudan
Bahrain
Jordan
Oman
Qatar
Saudi rabia
U E
China
Japan
Korea
Taiwan
Cambodia
Malaysia
Myanmar
Philippine
Singapore
Thailand
Vietnam
India
Maldives
Nepal
Seychelles
Sri Lanka
ustralia
Fiji
New Caledonia
New Zealand
Tahiti
Canada
Mexico
Puerto Rico
US
rgentina
Brazil
Panama
Peru
13
x 25!
Growth path experienced in all key VRV
markets
0
20
40
60
80
100
120
0 3 6 9 12 15 18 21 24 27 30 33
1. Tipping Point
2. High
Growth
3. Steady
Growth
Years after introduction
Japan
Australia
S. Korea
Singapore
Europe
14
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Energy: Efficiency of the system
15
VRV Architecture
16
Outdoor Unit
Indoor Units
Independent control of
each room and zones air
conditioning according to
thermal load.
Automatic control of
each indoor unit
Energy conservation.
Variable Refrigerant Volume
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Groundbreaking technology applied
to VRV
Compressor Variable speed inverter compressor
Scroll compressor with relief mechanism
Reluctance DC motor (IPMInner Permanent Magnet) synchronous motor)
Neodymium magnet
Sensor-less DC inverter
Sign wave inverter
Heat exchanger Sub cool circuit for longer piping
e-Pass cooling pipe location
Control system Hi-speed DIII protocol
Intelligent-Manager, Intelligent-touch-ControllerIntelligent-touch-Manager
BACNet Interface, LONWorks Interface
A/C Network Service System (AIRNET, Energy Saving AIRNET) 17
Reluctance
DC Motor
Scroll Type
Reluctance
Scroll Type
0.1
1
10
150 200 250 300 350 400 450 500
[J/kg]
[MPa]
R410A
-100 10
20 040 50
6 0 7 0 80 9 0 10 0
-20
-30
110120
Energy saving is achieved by:- Lowering condensing temperature
- Increasing evaporating temperature
Output current after correction
Sine-wave DCInverter Standard Inverter
Former Fan modelAero Spiral Fan
HighTemp.gas
D.I.S.O. CircuitTo compensate refrigerant flow velocityreduction caused by gas condensation, 2passes are combined into 1 restricted to 1.Heat exchange efficiency 11% UP
Heat exchanger
Aero Spiral Fan
Fan
Compressor
Essential technologies
Liquid
refrigerant
Enthalpy (Kcal/kg)
Pressure
(MPa)
18
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System Parts with built-in Inverters
The motor of the compressor, the heart of an
air conditioner, consumes most power.
PCB
INV
INV
INVINV
PCB
PCB
Outdoor unit
INV Inverter device
Compressormotor
Fan motor
Indoor unit fan motor
Air
Air Air
Electronic
expansion
valve motor
19
T1 = Refrigerant IN temp.
T2 = Refrigerant OUT temp.
T3 = Return air temp.
T4 = Set temp. of RC
According to the readings of 4 sensers, every 5 sec., CPU calculates optimum
capacity and adjusting EEV in PID (Propotional Integral & Derivative) action.
PID control ensures optimum comfort.
Suction
Discharge
Liquid
Gas
Electronicexpansion valve
Evaporator
T4
T1
T3
Fan
T2
CPU
RC
1 2 3 4
Condensing unit adjust the inverter
compressor to provide the required capacity
(Low or High)
Each indoor controls its capacity via
PID control and an E.E.V.
INDEPENDENT
BRAIN
System Capacity Control
20
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0
20
40
60
80
100
120
140
160
18 20 22 24 26 28 30 32 34 36 38 40 42 44 46
Quick and efficient traceability for the load fluctuationQuick capacity adjustment for changing load
Adjusting refrigerant flow
Partial load Performance
1
2
3
4
5
6
7
8
9
1
1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2 21 22 23 24
Daily occupancy ratioYearly Cooling hours
Design condition
Less than 10 hrs
In a year
Major operation
range : > 38C
Randomoccupancy
Ambient Temperature )Time
AC is selected for maximum load but operated under
fluctuating partial load almost all time
21
High Efficiency on Partial Load
22
COP
100%
4.0
4.5
5.0
5.5
6.0
6.5
7.0
20% 40% 60% 80%
Load Area
Cooling Load
Nominal COP*
* 8 HP
Cooling COP
Partial Load gives high efficiency , Most of the timebuilding run on partial Loads
COP = Cooling capacity /Power Input
6.6
4.3
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Operations as per building need
Precise Temperature Control
Consumes Energy as per cooling load
User benefit - User can save
energy by avoiding useless
operation
Individual Control
23
Inverter Technology
24
Stable temperature control by electronic expansion
valve and inverter compressor
30
25
20
15
10 20 30 40 50 60 70 Min.
RoomT
emp
erature
Set Temp.
Time
Automatically adjusts compressor speed to meet load
Strives to run long periods at very low speeds
Reduce cyclic losses
Improve temperature controls
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Latest Development
25
VRT Control
26
Innovative New Technology !
VRT VariableRefrigerantTemperature)
How can we achieve best performance in unstablecondition?
Targets Methods Results
Compressor
speed changeInverter
Ref. Volume
change
Evaporating
temp. changeVRT
Comp. Work
changeNew!
Cooling load is always changing
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VRT Control
27
Power consumption
Inverter
Reduction
Comp. Work (power consumption) reduction
Comp. Work
Comp. Work
V
Ref. Temp.
TC(Cond. Temp.)
TE(Eva. Temp.)
50% 100% Ref. flow
Reduction
VRT Control
28
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Because of smallerhigh & low pressure
difference!
ReasonHigher efficiency at cooling
C
t
y
VRT
Conventional A/C
R
E
e
m
p
oad
C
n
o
c
y
100%
25%
C
P
Outdoor
Temp
35 3 5
VRT
Conventional A/C
2.4 times stronger !
50% more
compression volume
High Efficiency Scroll compressor.
A 50% thinner & 20% higher scroll blade, which is
realized by adapting newly developed material,
increases compression volume by 50%.
50% thinner
20% higher
Iron based alloy casting
produced by Thixocasting
process.
Thixocasting process
In the way that cast the material
in a semi-molten state, it is
capable of producing very high
strength products.
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Maximized
surface area
32
fins!
30% smaller fin pitch
New Current
4-faceheat exchanger
50% more heat exchange surface
32
VRV IV
Refrigerant cooled inverter
VRV IV, inverter circuit is cooled by refrigerant
So, efficient & reliable cooling without influence of
ambient air temperature
Refrigerant cooled circuit
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Air net System: Energy Saving
33
I-Touch
Controller
Optimizedenergy saving
setup
Operation
data
CustomerAirnet Control Center
(ACC)Optimized
energy savingsetup
Remote
energy saving
tune-up
service
(paid contract)
Operation datareport
(via phone line)
17 Weather data
locations from India
Weather
Association
Forecast Data
Spot
forecast
System overview
I-Manager
or
This system tunes the air conditioner according to customer's outdoor
indoor location, operating conditions and day by day weather condition.
* Optional chargeable service
Environment
34
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Water
2.6 watts/lb
25 watts/ lb
Refrigerant
A ir
0.14 watt s/lb
VAV VWV VRV
Heat Transfer Media
Why Refrigerant?The commonly used methods of Heat Transfer in Air Conditioning solutions each
exercise different operational characteristics regards adding or removing heatenergy to a conditioned space as follows:
This diagram represents the energy transfer possible per lb of media due to the
performance characteristic of the fluid used.35
Environmental Consciousness
RoHS (Reduction of Hazardous Substances)
High COP (lower global warming impact, lower running cost)
Less refrigerant (zero ODP, lower global warming impact)
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Further Energy saving through
Smart Controller
37
Location Time Hour Set Temp. Mode SetRemote
Restriction
Lift Lobby/
Common
areas
Morning8:00 -10:00
26
C Cooling No
Up to
Lunch
10:00 -
14:00- Fan Yes
Afternoo
n
14:00 -
20:0026
C Cooling No
Night20:00 -8:00
- Fan Yes
Energy Savings Proposal by Controller
Location Time Hour Set Temp. Mode SetRemote
Restriction
Office
Morning9:00 -
13:0023-25
C Cooling No
Lunch13:00 -14:00
- Fan Yes
Afternoon14:00 -
18:3024-26
C Cooling No
Evening 18:30 Stop All Systems
Case Study: Project @ Pune
Scheduling Required by client
Without Energysavings
25/08/10~31/8/10
( Previousconditions)
With Energysavings Proposal
1/09/10~7/09/10
( Presentconditions)
Total Testing Area 4 Floors: Right & Left Wing- 1 & 2 Floors
Centralized System38
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0
50
100
150
200
250
300
350
25-Aug 26-Aug 27-Aug 28-Aug 29-Aug 30-Aug 31-Aug 1-Sep 2-Sep 3-Sep 4-Sep 5-Sep 6-Sep 7-Sep
Wed Thur Fri SaturdaySunday M onday Tuesday Wed Thur Fri SaturdaySunday M onday Tuesday
24 24 24 24 24 25 25 25 25 25 25 25 25 25
kwh
kwh
1545 Kwh 1202 Kwh
Energy savings weekly = 22 %
Mean Ambienttemp
325 kwh
250 Kwh
Weekly Energy Savings
Reduction- 22 %
Energy savings= (1545-1202)/1545*100
Day
before after
Case Study: Project @ Pune
39
System Structure
For download PPD data anduploading project data
40
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Indoor Environmental quality
41
Outdoor Air Processing Unit
42
Fresh air treatment and air conditioning with a single system
Fan coil units for air conditioning and an outdoor-air processing unit can be
connected to the same refrigerant line.
Enhanced design flexibility and a significant reduction in total system costs.
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Outdoor Air Processing Unit
43
Fresh air treatment and air conditioning with a single system
Fan coil units for air conditioning and an outdoor-air processing unit can be
connected to the same refrigerant line.
Enhanced design flexibility and a significant reduction in total system costs.
Heat Reclaim Ventilation (HRV)
44
ON/OFF signal
Cooling/Heating mode signalSet temperature signal
Ventilation signal
Failure detection signal
LCD remote
controller for
indoor unit
VRV Indoor unit
HRV
Air ConditioningLoad Reduced byApproximately 28%
Ex. air
23C 50
Cooled FA
27.5C 75
Hot F.A.
35C 80
Exhaust air
HRV recovers heat from Exhaust air
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Future Direction
45
Future direction
Super large
projectIntegration with
applied system
Multi functionCooling/heating/
floor heating/hot
water supplyCooling+heat
recovery for hotwater
Optimization for
residenceConnection with
HA automation
Price optimizationby residenceconcentratedspecification
Further Hi-
COPHi-COPrefrigerantRevolutionarycompressor/hea
t exchanger
VRVDiversification
of the heat
sourceElectricGasGeo thermaletc
46
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Multi function VRV
4HP48HP
Hot water supply
Floor heating
Air-conditioning
47
VRVfor cold area
2 step compression type
Hi-COP even at20degC
10HP20HP
48
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Ice thermal storage VRV
Ice thermal storage tank
VRV
10HP42HP
49
CO2VRV
10HP
50
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Gas heat pump VRV
8HP50HP
51
Typical cluster details:Size: 93,000 sqm
Average floor plate size:
Wing 1&4 2,600 sqm
Wing 2&3 3,000 sqm
Floor Levels
Wing 1&4 2 Lower Ground Floor+Ground Floor+5 Floors
Wing 2&3 2 Lower Ground Floor+Ground Floor+7 Floors
Equipment Configuration:
System Selected VRV III (Total Capacity: 16512 HP, 928 ODU)
Refrigerant R-410A
Outdoor Units Heat pump types
ModelRXYQ18PY1: 896 nos.
RXYQ12PY1: 32 nos.
Indoor Units FXFQ-MVE (Ceiling Mounted Multi Flow Cassette): 6,600 nos.
Control System Intelligent Manager III (DAM602B51: 32 nos.)
Project Detail: EONVRV III was selected for its various practical
benefits.
1.Phase wise installation and commissioning;
2.Energy Savings
3.Simplified Control and Maintenance
4.Independent AC system for each tenant
Customer Criteria for A/C selection :
SEZ Special Economic Zone project
=> VRV Biggest project
Location: Pune, India
Project Details:
Application of VRV technology on large size projects
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Thank you for your attention!
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