Dunham Bush Air-Cooled Screw Chiller | AFVX-B

Dunham Bush Air-Cooled Screw Chiller | AFVX-B

Dunham Bush Air‐Cooled Screw Chiller
AFVX‐B‐6SR Series
Type of Compressors
Compressor
Rotary
Scroll
Reciprocating
Screw
Centrifugal
Air Cooled Chiller
77 ~ 329TR
(270 ~ 1156 kW)
ACDX Series
100 ~ 520TR
(352 ~ 1830kW)
10 ~ 180TR
(35 ~ 633 kW)
AFVX-B Series
ACDS Series
0
100
200
300
400
TR
500
600
700
AFVX-B-6SR Series
Generation
SPEC‐ Selection Program Electronic Catalogue
AFVX-B-6SR Series
Generation
AFVX-B-6SR Series
High Efficiency Fan
Condenser Coil
Microprocessor Controller
- Low rpm & Low noise
- 64-67dBA at 10 meter
- V Coil Design
- Inner Groove Copper tube
- Aluminium Wave Fin
- Advance Vision 2020i Controller
- Double Door Protection
- IP 55
- Factory Packaged Starter
Vertical Screw Compressor
- Hermetic Patented Design
- Small Footprint
- Multiple Compressors
- Acoustically Compartmentalized
Flooded Evaporator
- Better Approach
- High Efficiency
- Inner Groove Copper tube
AFVX-B-6SR Series
– 13 Models (100-504RT)
– Plate Heat Ex-changer Economizer
– Improved & Enhanced Compressor .
– 127, 192 and 226mm rotor series
– Qty 1 & 2 only
– 3.4hp condenser fan motor
– Average at 1.175 kw/rt
– 10% more efficient
– Electronic Expansion Valve (EEV)
– Further enhanced evaporator with new
shell design
– Aluminium blade fan
– 900mm fan diameter
– Compact footprint
– Reduced height
AFVX-B-6SR Series
Condenser Fan Motor
Sound @ 10M
Model
Capacity
AFVX‐B
TR
Qty
KW
Qty
HP
L
W
H
dB(A)
100‐6SR
99.6
1
99.5
7
3.4
4710
2235
2235
64
120‐6SR
116.0
1
119.2
7
3.4
4710
2235
2235
65
135‐6SR
132.2
1
138.4
7
3 .4
4710
2235
2235
65
165‐6SR
164.9
1
171.3
9
3.4
5860
2235
2235
65
200‐6SR
192.3
1
197.7
11
3.4
7210
2235
2368
65
225‐6SR
216.0
1
220.9
11
3 .4
7210
2235
2368
65
260‐6SR
251.9
1
257.2
13
3.4
8360
2235
2368
63
280‐6SR
278.8
2
283.1
18
3.4
11510
2235
2368
67
330‐6SR
328.7
2
342.7
18
3.4
11510
2235
2368
67
360‐6SR
359.0
2
377.9
18
3.4
11510
2235
2368
67
400‐6SR
384.6
2
395.4
22
3 .4
14420
2235
2368
75
450‐6SR
432.0
2
441.7
22
3.4
14420
2235
2368
75
520‐6SR
503.8
2
514.5
26
3 .4
16720
2235
2368
75
Compressor
Dimension
Compressor Location
Model : AFVXB 100 – 260
Model : AFVXB 280 – 360 Compressor Location
Model : AFVXB 400 – 520
Condenser Fan Cycling
Option List
Item
Code
Description
1.
2.
3.
MII2
SST
VM3
Main Incoming Isolator c/w Door Interlock Handle
Soft Starter c/w Bypass Contactor
3 Phase Voltmeter C/W Selection Switch
Yes
Yes
Yes
4.
AM3
3 Phase Amperage Meter C/W Selection Switch
Yes
5.
6.
7.
UVR
GFI
SVM
Under/Over Voltage Protection Relay
Ground Fault Interrupt
System Voltage Measurement
No
Yes
Yes
8.
LA1
Low Ambient Version, min. ambient 7˚C
No
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
LA2
LA3
HGBP
COP
HYD
250
INS
DINS
DES
ISO
Low Ambient Version, min. ambient ‐10˚C
Low Ambient Version, min. ambient ‐29˚C
Hot Gas Bypass for low load operation‐Auto Lead Lag
Copper‐Copper Condenser Coil
Hydrophillic Coated Condenser Fin
250 PSI Working Pressure Vessels (Flooded)
Evaporator Insulation
Double Evaporator Insulation 2"
Heat recovery (Desuperheater)
Isolation Valves Compressor(s) Suction, Discharge & VI
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
No
Yes
Yes
Yes
Yes
No
19.
FWC1
20.
GRL
Flanged Water Connections Evap.
Protective Grille Condenser
Description
NO APPROVAL
ASME
JKKP APPROVAL
PED APPROVAL
AFVXB‐5SR
Option List
Item
Code
21.
HEA
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
LN2
LN
2YC
5YC
SPG
RIS
WFS
WFS1
WFS4
IP55
PED
ASME
JKKP
SQL
CE
CE
DM
SHC
Description
Heater System to Protect Cooler Against Freezing, Protected up to ‐
20˚C
Compressor(s) Acoustic Jacket
Low Noise Version, including LN1 or LN2 and LN fans
2 Year Compressor Warranty
5 Year Compressor Warranty
Spring Vibration Isolators Rubber‐in Rush Isolator Water Flow Switch : CE marking
Water Flow Switch :NEMA1, min fluid & ambient 32ºF
Water Flow Switch :NEMA4, min fluid & ambient ‐62ºF
IP55 Control Panel
PED coded vessels
ASME coded vessels
JKKP coded vessels
Chinese Machinery (SQL) coded vessels
PED (including piping) + CE components PED (vessel) + CE components + IEC Control Panel
Dual Mode (Ice ‐Cel)
Semi Hermetic Compressor
Description
AFVXB‐5SR
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
AFVX-B-6SR Series
New Improved,
Enhance & Extended
capacity range of
192mm and 226mm
compressor series
Unique Patented
Screw compressor
technology
High reliability and
stability
Excellent Performance
And Operation Cost
Efficiency
AFVX-B-6SR Series
Dunham-Bush patented screw
profile design which is
specially made for R134a
application..
Carbon Steel screw profile
with high precision machining..
Dynamic balancing and over
speed testing before
assembly to ensure the
quality and stability..
AFVX-B-6SR Series
Core components are all processed by sophisticated facilities
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
Evaporator Improvement
 Suction baffle design (Eliminator) to eliminate or reduce the liquid carry over possibility.
 Provides uniform distribution of refrigerant over the entire shell length to yield optimum
heat transfer
.
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
Flooded Evaporator
• Better Part‐Load Efficiency
Flooded Evaporator
Flooded Chiller 
Evaporator fully utilizes tube surface for heat transfer at part load
DX Chiller
Refrigerant in
shell
Water in tubes
DX Evaporator

Normally blank off part of the evaporator circuit
Water in shell

Portion of the tubes will not be used for heat Refrigerant in
tubes
transfer at part load
Advance Controller
Flexible programmable DDC advance Vision2020i controller. Complete with digital and analog I/O. Monitoring
equipment or system status, water flow status, temperature, pressure, compressor amp, external start/ stop
command status, and run time status.
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
Database
Server
Notebook PC
Workstation
 Main equipment control and
monitoring.
 Vary Flow rate of pump(s) by
controlling system VFD.
Temp difference monitoring
and feedback.
Chillers
Primary CW Second. CW
Pumps
Pumps
AHRI Certified Testing Facilities
• Completed Units will be inspected by Quality Control Dept.
• Every unit undergoes a functional and a full load performance
test by the Chiller Testing Team before they are shipped out
to end users.
• Unit is shipped with refrigerant charged and Lubricating oil.
Semi Hermetic and Fully Hermetic Comparison
07 HSC vs VSC Configuration.swf
Semi Hermetic and Fully Hermetic Comparison
- Structure
• Double Layer Shell
• All moving parts
concealed within
internal shell
(Noise confined)
Single Layer Shell
• Hermetic Outer Shell –
no leak, further noise
reduction
Semi Hermetic and Fully Hermetic Comparison
- Rotor
Superb wear
& tear
resistance
Semi Hermetic and Fully Hermetic Comparison
- Rotor
Semi Hermetic and Fully Hermetic Comparison
- Oil Separation
Primary
Oil Separator
2nd or Secondary
Oil Separator
Oil Deflector
99.7% Oil Separation
1st or Primary
Oil Separator
Semi Hermetic and Fully Hermetic Comparison
- Bearing Lubrication
Differential Pressure Lubrication
Submerged in Oil – Always lubricated
Semi Hermetic and Fully Hermetic Comparison
- Capacity Control
Precise Capacity
Control with
Hydraulically
actuated
electronically
initiated stepless
slide valve
control
Semi Hermetic and Fully Hermetic Comparison
- Motor Cooling
Ensure
superheat on
part load –
maximize oil
separation,
minimize oil
carry-over
What’s Next..??
Air Cooled Screw Chiller
with Inverter Driven (VFD)…
 Variable Frequency Drive Compressor
 Frequency range of 25-60Hz.
 IPLV improvement of 20-30%
 Environmentally Friendly R134A
 Low Noise and Compact
Thank You
Product That Perform … By People Who Care