Dunham Bush Water-Cooled Screw Chillers with Inverter Driven

Dunham Bush Water‐Cooled Screw Chiller With Inverter Driven (VFD)
WCFX‐EV Series
Why Inverter Driven Chiller..?
Global Energy Crisis…
The planet is progressively marching towards a serious electric energy crisis,
owing to an escalating desire of electric energy becoming greater than its
supply. There has been an enormous increase in the global demand for
electric energy in recent years as a result of industrial development and
population growth. Supply of electric energy is, therefore, far less than the
actual demand.
GLOBAL ENERGY SOURCES
ARE DEPLETING….
Energy Apportion in a Building ..
HVAC contributes to 67% of a typical building energy consumption,
Thus if we want to reduce or save energy, HVAC is one of the
system that we should consider..
5000
Green Building Certification..
A Green building certification is a benchmarking scheme which aims to
achieve a sustainable built environment by incorporating best practices in
environmental design and construction, and the adoption of green
building technologies. This includes…
 Energy efficiency
 Water efficiency
 Environmental protection
 Indoor environmental quality
 Other green & innovative features
Advantages of Green Building..
A Green building focuses on increasing the efficiency of resource use –
energy, water, and materials – while reducing building impact on human
health and the environment during the building’s lifecycle, through better
design, construction, operation, maintenance, and removal. Some of the
advantages of Green building are…
 Cost less to operate, reducing energy as much as 40%
 Increases building property status and values.
 Eligible for incentives like tax rebates and energy schemes.
 Increase building efficiency and reduces valuable resources.
 Improve indoor environmental quality for a healthy workplace.
Energy Apportion for Water Cooled
Chiller System ..
Chiller contributes to 60% of air conditioning energy consumption,
Thus if we want to reduce or save energy, Chiller efficiency is one of
the equipment that we should consider..
5000
Calculation of Integrated Efficiency..
The Air Conditioning Heating and Refrigerant Institute (AHRI) has
established a system in AHRI standard 550/590 – 2011 for measuring the
total equipment performance over full and part load conditions. It defines
as integrated part load value (IPLV) as an excellent method of comparing
equipment on an equal basis.
1
IPLV =
0.01
A
1% at
100%
+
0.42
B
42% at
75%
+
0.45
C
45% at
50%
+
0.12
D
12% at
25%
A = kw/tr at 100% load C = kw/tr at 50% load
B = kw/tr at 75% load D = kw/tr at 25% load
Type of Compressors
Compressor
Rotary
Scroll
External Compressor
Reciprocating
Screw
Centrifugal
DB Compressor
Water Cooled Chiller
300 ~ 4000TR
(1055 ~ 10548 kW)
130 ~ 665TR
(457 ~ 1,753kW)
NEW
DCLC Series
WCFX-EV Series
66 ~ 1000TR
(232 ~ 3501kW)
DCLCV Series
(VFD Ready)
12 ~ 62TR
(42 ~ 218 kW)
WCFX-E Series
WCS Series
0
500
1000
1500
2000
2500
TR
3000
3500
4000
WCFX-EV Series
Screw
Compressor
Variable Freq Drive
(VFD)
Controller
7” color touch screen
(Optional 15”)
Evaporator
Condenser
WCFX-EV Series Features..
High Efficiency
 Improved Integrated Part Load Value (IPLV)
 Precise Capacity Control with VFD
Low Energy Consumption
 Low Starting Current with Zero Inrush
 No Conventional Starter Required
 Improved Power Factor @ 0.95
Intelligent Built-In System
 Built-in Motor Temp Sensors
 Built-in Electronic Overload Protector
 Built-in Energy Measurement Function
Touch Screen Panel
 Integrated 7” Touch Screen Panel
Low Noise Level @ Part Load
WCFX-EV Series
- Low Starting Current with Zero Inrush
WCFX-EV Series
- VFD Enclosure Ratings
Chassis — IP 00
Provides no protection for the drive or people around the drive
Must generally be mounted in another enclosure
 NEMA 1 — IP 20
“Finger proof”
Cooling air flows through the  inside of the drive – no dust filter
 NEMA 12 — IP 54 (Standard Feature) “Dust proof” & water splash proof Cooling air flows along the exterior heat sink, gaskets seal the interior of the drive
 Do not requires additional enclosure for indoor installation
VFD vs Standard Chiller Efficiency..
DB Standard Chiller
DB Chiller with VFD
Competitor Standard Chiller
Competitor Chiller with VFD
15
0.7
0.6
0.5
10
0.4
Annual Hours (%)
Chiller Efficiency (kW/TR)
0.8
5
0.3
0.2
0.1
10
65
20
65
30
65
40
65
50
65
60
69
70
73
80
77
90
81
100
85
0
% of Load
EWCT(0F)
Competitors Comparison..
WCFX-EV
Model : 18 Models
Capacity: 130 RT – 665 RT
30XW-V
YVWA
Model : 9 Models
Capacity: 170 RT – 495 RT
Model : 5 Models
Capacity: 120 RT – 300 RT
Ave. IPLV : 0.35 Kw/RT
(9% more efficient)
Ave. IPLV : 0.38 Kw/RT
Touch Screen Panel
Touch Screen Panel
Noise Reduction @ 25%: 10 dBA
Noise Reduction @ 25%: 10dBA
Ave. IPLV : 0.38 Kw/RT
Key Pad Panel
Noise Reduction @ 25%: N/A
Competitors Comparison..
WCFX-EV
30XW-V
Refrigerant: R134A
Refrigerant: R134A
Multi Comp, Single System
(Improved IPLV value)
Hermetic / Semi Hermetic
Single/Twin Screw
Frequency : 25 Hz – 60Hz
Multi Comp, Multi System
YVWA
Refrigerant: R134A
Multi Comp, Multi System
Semi Hermetic
Semi Hermetic
Single/Twin Screw
Single/Twin Screw
Frequency : 25 Hz – 60Hz
Frequency : 25 Hz – 60Hz
Multi Compressor Single System..
WCFX-EV Series..
Hi-Tech and Efficient Design：
Patented compressor design with Improved IPLV
Designed & Optimized for R134a & VFD application
Adopt advanced 3D CAD Design Software
Factory functional test at 125% speed
Factory dynamic balancing test…
WCFX-EV Series
New Improved, Enhanced
& Extended capacity range
of 192mm and 226mm
compressor series
Unique Patented Screw
compressor technology
Designed & Optimized
for VFD application
High reliability and
stability
Excellent Performance
And Operation Cost
Efficiency
WCFX-EV Series
Dunham-Bush patented screw
profile design which is
specially made for R134A &
VFD application..
Carbon Steel screw profile
with high precision machining..
Dynamic balancing and over
speed testing before
assembly to ensure the
quality and stability..
WCFX-EV Series
Core components are all processed by sophisticated facilities
WCFX-EV Series
Evaporator Improvement
 Flooded heat exchanger technology.
 Making use of unique “Skip-fin” Efficient Tube Design
before
Eliminator
Refrigeration
Vapor
Tube
Leaving
Water
Entering
Water
DB type (“skip-fin” design)
Flow Equalizer
Refrigeration
Liquid
Flooded Evaporator
• Higher capacity and Higher EER achievable with the same compressor
− Good evaporator approach temperature < 3 F − Higher evaporating temperature compared to the DX evaporator system
− Capacity increases from 724 RT to 796 RT
♦ 10% increase in capacity
− Very little power increase
Condenser Improvement
 Improved discharge baffle design to reduce direct impingement of high velocity refrigerant
 Making use of unique “Skip-fin” Efficient Tube Design
before
Refrigeration Vapor
Lead Plate
Tube
Leaving
Water
DB type (“skip-fin” design)
Entering
Water
Refrigeration Liquid
Subcooler
Advanced Microprocessor Controller
Flexible Reprogrammable Microprocessor and advance programmable controller. Complete with digital and
analog I/O. Monitoring equipment or system status, water flow status, temperature, pressure, and run time.
7.0” 64K color LCD Touch Screen graphic user interface, Displays operation conditions, compressor run time,
alarm history and modify control parameters.
Embedded System Protection controls. Low suction, high discharge, Freeze protection, compressor run error,
compressor anti-cycle, compressor over current, compressor low oil and power lost…etc
Remote Monitoring made possible with optional communication card(s) and NETVISOR software. Add on cards
(options) are also available to allow direct interface to Building Management System (BMS) by means of standards
open communication protocols (MODBUS / LONWORKS / BACNET MSTP or even Over IP)
Chiller Monitoring & Control
PC
Remote PC
Workstation Workstation
Cooling
Tower
Cond.
Pumps
Database
Server
Chillers
Notebook PC
Workstation
Primary CW Second. CW
Pumps
Pumps
AHRI Certification..
In Progress…
Jan 2014…
50 Hz
Generation
60 Hz
Catalogue & Selection Software..
In Progress…
Jan 2014…
Generation
SPEC‐ Selection Program Electronic Catalogue
AHRI Certified Testing Facilities