Dunham Bush Water‐Cooled Screw Chiller With Inverter Driven (VFD)

WCFX‐EV Series

Why Inverter Driven Chiller..?

The planet is progressively marching towards a serious electric energy crisis,owing to an escalating desire of electric energy becoming greater than itssupply. There has been an enormous increase in the global demand forelectric energy in recent years as a result of industrial development andpopulation growth. Supply of electric energy is, therefore, far less than theactual demand.

Global Energy Crisis…

GLOBAL ENERGY SOURCES ARE DEPLETING….

5000

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 thesystem that we should consider..

Green Building Certification..

A Green building certification is a benchmarking scheme which aims toachieve a sustainable built environment by incorporating best practices inenvironmental design and construction, and the adoption of greenbuilding technologies. This includes…

Energy efficiencyWater 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 humanhealth and the environment during the building’s lifecycle, through betterdesign, construction, operation, maintenance, and removal. Some of theadvantages 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.

5000

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 ofthe equipment that we should consider..

Calculation of Integrated Efficiency..

The Air Conditioning Heating and Refrigerant Institute (AHRI) hasestablished a system in AHRI standard 550/590 – 2011 for measuring thetotal equipment performance over full and part load conditions. It definesas integrated part load value (IPLV) as an excellent method of comparingequipment on an equal basis.

A = kw/tr at 100% load B = kw/tr at 75% load

IPLV =0.01

A+

0.42

B

0.45

C

0.12

D+ +

1

C = kw/tr at 50% load D = kw/tr at 25% load

1% at 100%

42% at 75%

45% at 50%

12% at 25%

Type of Compressors

Compressor

Rotary Scroll Reciprocating Screw Centrifugal

DB CompressorDB CompressorExternal CompressorExternal Compressor

WCS Series

66 ~ 1000TR(232 ~ 3501kW)

12 ~ 62TR (42 ~ 218 kW)

5000 1000 1500 2000 2500 3000 3500 4000

TR

300 ~ 4000TR(1055 ~ 10548 kW)

DCLC Series

WCFX-E Series

130 ~ 665TR(457 ~ 1,753kW)

WCFX-EV Series

NEW

Water Cooled Chiller

DCLCV Series(VFD Ready)

WCFX-EV Series

Controller 7” color touch screen

(Optional 15”)

Controller 7” color touch screen

(Optional 15”)

Screw Compressor

Screw Compressor

EvaporatorEvaporator

CondenserCondenser

Variable Freq Drive (VFD)

Variable Freq Drive (VFD)

WCFX-EV Series Features..

High Efficiency

Low Starting Current with Zero Inrush No Conventional Starter Required Improved Power Factor @ 0.95

Improved Integrated Part Load Value (IPLV) Precise Capacity Control with VFD

Touch Screen Panel

Intelligent Built-In System

Low Energy Consumption

Built-in Motor Temp Sensors Built-in Electronic Overload Protector Built-in Energy Measurement Function

Low Noise Level @ Part Load Integrated 7” Touch Screen Panel

WCFX-EV Series

- Low Starting Current with Zero Inrush

WCFX-EV Series

- VFD Enclosure Ratings Chassis — IP 00Provides no protection for the drive or people around the driveMust 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..

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.1 0

5

10

15

10 20 30 40 50 60 70 80 90 100 % of LoadEWCT(0F)65 65 65 65 65 69 73 77 81 85

Annu

al Hou

rs (%

)

Chiller Efficiency (kW/TR)

DB Standard ChillerDB Chiller with VFD

Competitor Standard ChillerCompetitor Chiller with VFD

WCFX-EV

Competitors Comparison..

30XW-V YVWA

Model : 18 ModelsCapacity: 130 RT – 665 RT

Model : 9 ModelsCapacity: 170 RT – 495 RT

Model : 5 ModelsCapacity: 120 RT – 300 RT

Ave. IPLV : 0.35 Kw/RT(9% more efficient)

Ave. IPLV : 0.38 Kw/RT Ave. IPLV : 0.38 Kw/RT

Touch Screen Panel Touch Screen Panel Key Pad Panel

Noise Reduction @ 25%: 10 dBA Noise Reduction @ 25%: 10dBA Noise Reduction @ 25%: N/A

Multi Comp, Single System(Improved IPLV value)

Competitors Comparison..

Refrigerant: R134A

Single/Twin Screw Single/Twin Screw Single/Twin Screw

Frequency : 25 Hz – 60Hz Frequency : 25 Hz – 60Hz Frequency : 25 Hz – 60Hz

Hermetic / Semi Hermetic Semi Hermetic Semi Hermetic

Refrigerant: R134A Refrigerant: R134A

Multi Comp, Multi System Multi Comp, Multi System

WCFX-EV 30XW-V YVWA

Multi Compressor Single System..

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..

Unique Patented Screw compressor technology

Designed & Optimized for VFD application

High reliability and stability

Excellent Performance And Operation Cost Efficiency

New Improved, Enhanced & Extended capacity range of 192mm and 226mmcompressor series

WCFX-EV Series

Dynamic balancing and over speed testing before assembly to ensure the quality and stability..

Dunham-Bush patented screw profile design which is specially made for R134A & VFD application..

Carbon Steel screw profile with high precision machining..

WCFX-EV Series

Core components are all processed by sophisticated facilities

WCFX-EV Series

WCFX-EV Series

Flooded heat exchanger technology. Making use of unique “Skip-fin” Efficient Tube Design

Entering Water

Refrigeration Vapor

Tube

Eliminator

Refrigeration Liquid

Flow Equalizer

Leaving Water

before

DB type (“skip-fin” design)

Evaporator Improvement

• 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

Flooded Evaporator

Improved discharge baffle design to reduce direct impingement of high velocity refrigerant Making use of unique “Skip-fin” Efficient Tube Design

before

DB type (“skip-fin” design)

Lead Plate

Subcooler

Tube

Refrigeration Vapor

Refrigeration LiquidEntering Water

Leaving Water

Condenser Improvement

Flexible Reprogrammable Microprocessor and advance programmable controller. Complete with digital andanalog 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 standardsopen communication protocols (MODBUS / LONWORKS / BACNET MSTP or even Over IP)

Advanced Microprocessor Controller

Chiller Monitoring & ControlPC

WorkstationRemote PC Workstation

Database Server

Notebook PC Workstation

Cooling Tower

Cond. Pumps

Chillers Primary CW Pumps

Second. CW Pumps

Generation

AHRI Certification..

60 Hz50 Hz

In Progress…Jan 2014…

Generation

SPEC‐ Selection Program Electronic Catalogue

Catalogue & Selection Software..

In Progress…Jan 2014…

AHRI Certified Testing Facilities