Alternate Energy Systems, Inc.
A Corporation devoted to Energy-Oriented Needs
DR
AF
T
Vertical Water Bath
LPG Vaporizers
• Designed for
•
•
•
•
•
•
•
•
•
•
External Water Supply
For Propane, Butane, and
other LPG
Conforms to ASME, NFPA
FM / IRI approved
Durable, Heavy Gauge Steel
Construction
All-Welded Design
Flanged Connections
Vapor Tube rated for
250 psi @ 650 °F
Factory primed,
painted, and tested
Liquid Carryover Protection
Domestic and Export Versions
VWB- 120
VWB- 240
VWB- 360
VWB- 750
VWB- 1000
VWB- 1500
VWB- 2000
VWB- 3000
VWB- 4000
VWB- 6000
Model Numbers
120 kg/h
(60 gph)
240 kg/h
(120 gph)
360 kg/h
(180 gph)
750 kg/h
(375 gph)
1000 kg/h
(500 gph)
1500 kg/h
(750 gph)
2000 kg/h
(1000 gph)
3000 kg/h
(1500 gph)
4000 kg/h
(2000 gph)
6000 kg/h
(3000 gph)
What are LPG Vaporizers ?
L
A
PG vaporizers are actually boilers. Instead of boiling water, they boil propane, butane, or another
LPG (Liquefied Petroleum Gas). It may sound strange that heat is required to vaporize LPG when
propane will boil at -44 °F and butane at 32 °F, but, when LPG vaporizes by expansion alone, it
causes a refrigeration action. In applications with high LPG flow, the uncontrolled vaporization would
freeze valves and burner nozzles. Therefore, controlled heat is required to offset the refrigeration. action.
Standard Features and Options
Standard Features:
• Stainless Steel LPG Vapor Tube in models VWB-120 to VWB-360,
rated at 250 psig @ 650 °F.
• LPG Vapor Tube with welded heat transfer fins in models VWB-750 to VWB-2000,
rated at 250 psig @ 650 °F.
• Designed and manufactured per ASME Pressure Vessel Code,
Section VIII, Division 1 and NFPA 58.
• Designed for external hot water supply.
• All models are FM approved.
• Liquid Carryover Protection.
• UL listed Safety Pressure Relief Valve.
• UL listed Solenoid Valve (Vapor Outlet).
• Factory Primed, Painted, and Tested.
W
Options:
• Steel Skid Mounting of several vaporizers to achieve capacities over 2000 kg per
hour.
• Steel Skid Mounting of Vaporizer and Commercial Water Heater for compact, easy to
install system.
• ASME “U” Stamp.
• Custom Control Panels and System Integration.
• Combination with Vapor/Air Mixing Systems.
Applications
A
ES Water Bath Vaporizers have been manufactured since 1974 and have seen continuous design
improvement. This has lead to probably the most versatile and most reliable line of Water Bath
Vaporizers on the market today.
Installations around the world include Peak Shaving Plants for Gas Utilities, Standby Plants for large
industrial users, Backup Systems for government and defense installations, Primary Fuel Source for
areas without natural gas supply or for areas preparing for connection to natural gas, Power Plants, Glass
and Brick Manufacturing, etc.
AES Water Bath Vaporizers can be used “stand-alone”, or in combination with a LPG/Air mixing system,
producing gas which is directly interchangeable with natural gas.
The VWB series was specifically designed for applications where the owner prefers to use an existing hot
water supply for the vaporization process. These models are also used in installations where local or
national codes prohibit the use of any kind of open flame in the vaporization process of LPG. Compared
to vaporizers with local heat sources, the VWB series offers the additional layer of safety due the lack of
any high-power/high-energy component anywhere near the LPG.
How do Alternate Energy Systems’
Vertical Water Bath Vaporizers work?
V
ertical Water Bath Vaporizers are available in capacities from 120 kg per hour (60 gph), to
2000 kg per hour (1000 gph). Larger capacities are achieved by combining several
smaller units through liquid inlet and vapor outlet header, often on a common steel skid.
From the outside, all models look alike. Internally, they differ primarily in the type and active heat
exchange area of their vaporization tubes. The main advantage of Vertical Water Bath
Vaporizers lies in the fact that through the use of an external hot water supply, local restrictions
for the use of an open flame or electricity for the purpose of vaporization of LPG can easily be
avoided.
The drawing below shows a typical configuration of a 360 kg/h (180 gph) vaporizer. The main
components of the vaporizer are the Water Inlet and Water Outlet (A), the coiled Vapor Tube (B),
the Steel Shell (C), the Vapor Outlet Header (D) with Liquid Carryover Protection (E), and the
Solenoid Vapor Shutoff Valve (F).
Also shown on the drawing are the Water Tank Insulation (G), the Outer Sheet Metal Shell (H),
the controls for Water Temperature (low / high) (I), and the Water Level Control (J).
The active portions of the Heater Elements and the Vapor Tube are fully immersed in a warm
water/anti-freeze solution, supplied by an external source. The external source (usually a boiler
or commercial water heater) controls the the water temperature, the water level, and the water
flow. The Temperature Controls (I) are provided to for convenience only, and are not used in the
operation of the vaporizer. The heat from the water is transferred through the Vapor Tube (B) to
the LPG, which then evaporates and exits the system through the Vapor Outlet Header (D). A
Temperature Sensor (E) is inserted into the Vapor Outlet Header. This Temperature Sensor
would detect any temperature drop, associated with the presence of liquid LPG. If this occurs,
the Solenoid Valve (F) on the vapor outlet side closes and prevents liquid from exiting the
N
vaporizer (Liquid Carryover Protection).
F
Other components in the vaporizer are the explosion
proof Junction Box (K), the Vapor Pressure Relief
Valve (L), and the Manual Water Drain (O).
K
Models with capacities of 750 kg per hour and higher
use vertically stacked vaporization tubes instead of
the coiled versions of the smaller models. The insert
below shows the vapor tube configuration of a model
VWB-1500.
D
J
E
H
B
A
B
C
D
E
F
G
H
J
K
L
O
Water Inlet / Outlet
Vaporization Tube
Steel Shell
Vapor Outlet Header
Liquid Carryover Protection
Vapor Shutoff Solenoid
Water Tank Insulation
Outer Sheet Metal Shell
Water Level Control
Explosion Proof Junction Box
Vapor Pressure Relief Valve
Manual Water Drain
G
C
A
O
Drawings, Specifications
VWB-120
VWB-240
VWB-360
VWB-500
VWB-750
VWB-1000
VWB-1500
VWB-2000
A
B
C
D
SPECIFICATIONS (3)
VWB-120
Type
VWB-240
VWB-360
Vertical Water Bath Vaporizer with
stainless steel vaporization coil
120 (60)
240 (120)
360 (180)
VWB-750
VWB-1000
Vertical Water Bath Vaporizer
with vertically stacked
vaporization tube
arrangement.
Vaporization Capacity (1)
kg/h (gph)
750 (375)
Water Tank Capacity (2)
l (gal)
Design Temperature
°C (°F)
345 (650)
Design Pressure
bar (psi)
17 (250) (Test Pressure 25 bar, 375 psi)
190 (50)
1000 (500)
380 (100)
Standard Safety Features
Low Water Level Cutoff
Low Water Level Cutoff not required for vaporizer,
because of closed, pressurized system.
Depending on local or national codes, external Water Heater
may be required to have low water cutoff system.
High Water Bath Temperature
High Water Bath Temperature Cutoff not required for vaporizer, because of
closed, pressurized system. Depending on local or national codes, external
Water Heater may be required to have high water temperature cutoff system. All
systems also provide “dry” contact to indicate high water temperature condition.
Liquid Carryover Protection
Temperature Sensor in Vapor Outlet.
If temperature drops below factory setpoint, indicating the presence of liquid,
the solenoid valve in the vapor outlet is de-activated.
Relief Valve on Vaporizer Coil
UL approved, set at 250 psi
Liquid Inlet Connection
1” - 300# Raised Face Flange
Vapor Outlet Connection
2” - 300# Raised Face Flange
Vapor Tube Design
Water Flow Requirements (1)
l/min (gpm)
Electrical Requirements
Int. (USA)
Dimensions (2) (W x L x H )
Dry Weight (2)
14 coils of
3/4“ x 40” dia.
19 coils of
3/4“ x 40” dia.
28 coils of
3/4“ x 40” dia.
25 (6)
50 (12)
75 (18)
140 (36)
190 (50)
AC 230 V 50 Hz (AC 110 V 60 Hz), Single Phase
mm
(inch)
kg (lbs)
9 finned tubes in
vertical arrangement
460 x 460 x 1170
(18 x 18 x 46)
115 (250)
120 (260)
610 x 610 x 1905
(24 x 24 x 75)
125 (270)
320 (700)
365 (800)
(1) Nominal Capacity for Propane @ 0°F Liquid Temperature. Vaporization capacity for other LPG mixtures may vary.
(1) Based on Inlet/Outlet temperature difference of 10°C (18°F). (2) Dimensions and weights are approximate.
(3) Specifications subject to change without notice.
Drawings, Specifications
SPECIFICATIONS (3)
VWB-1500
Type
VWB-2000
VWB-3000
VWB-4000
VWB-6000
Vertical Water Bath Vaporizer Combination of Combination of Combination of
with vertically stacked
2 x VWB-1500 2 x VWB-2000 3 x VWB-2000
vaporization tube arrangement.
Vaporization Capacity (1)
kg/h (gph)
120 (60)
240 (120)
360 (180)
750 (375)
Water Tank Capacity (2)
l (gal)
380 (100)
Design Temperature
°C (°F)
345 (650)
Design Pressure
bar (psi)
17 (250) (Test Pressure 25 bar, 375 psi)
1000 (500)
Standard Safety Features
Low Water Level Cutoff
Low Water Level Cutoff not required for vaporizer,
because of closed, pressurized system.
Depending on local or national codes, external Water Heater
may be required to have low water cutoff system.
High Water Bath Temperature
High Water Bath Temperature Cutoff not required for vaporizer, because of
closed, pressurized system. Depending on local or national codes, external
Water Heater may be required to have high water temperature cutoff system. All
systems also provide “dry” contact to indicate high water temperature condition.
Liquid Carryover Protection
Temperature Sensor in Vapor Outlet.
If temperature drops below factory setpoint, indicating the presence of liquid,
the solenoid valve in the vapor outlet is de-activated.
Relief Valve on Vaporizer Coil
UL approved, set at 250 psi
Liquid Inlet Connection
2” - 300# Raised Face Flange
Vapor Outlet Connection
3” - 300# Raised Face Flange
Vapor Tube Design
9 finned tubes in vertical arrangement per unit
Water Flow Requirements (1)
l/min (gpm)
Electrical Requirements
Int. (USA)
AC 230 V 50 Hz (AC 110 V 60 Hz), Single Phase
Dimensions (2) (W x L x H )
mm (inch)
610 x 610 x 1905 (24 x 24 x 75) per unit
Dry Weight (2)
kg (lbs)
290 (75)
365 (800)
380 (100)
365 (800)
2 x 290 (75)
2 x 380 (100)
3 x 380 (100)
2 x VWB-1500 2 x VWB-2000 3 x VWB-2000
(1) Nominal Capacity for Propane @ 0°F Liquid Temperature. Vaporization capacity for other LPG mixtures may vary.
(1) Based on Inlet/Outlet temperature difference of 10°C (18°F). (2) Dimensions and weights are approximate.
(3) Specifications subject to change without notice.
Who is Alternate Energy Systems, Inc. ?
A
fter working for other manufacturers of LPG vaporizers and LPG / air systems for several years,
John E. Hallberg founded Alternate Energy Systems, Inc. in 1974 in Peachtree City, located just
20 minutes south-west of the Atlanta airport. He successfully set out to design and manufacture
products which were superior to those of his competitors. As a result, AES became very quickly known as
the innovative manufacturer of quality products. Soon, the customer list included a representative crosssection of the Fortune 500 companies in the U.S.
Through the years, AES has constantly added new
and has further improved the design of existing
keeping us ahead of the competition. Several
including those for LPG/Air mixing systems, were
national and international patents.
products,
products,
designs,
awarded
Today, AES is owned by Wolfgang Driftmeier. With his
manufacturing background and his experience in sales and marketing, the company focus is clearly on “...
offering the best product design, combined with quality workmanship, at a competitive price, to the full
satisfaction of our customers, at all times ...”.
AES is committed to serve customers in the U.S. through a network of sales specialists, technical support
personnel, distributors and installers, and international customers in selected countries through qualified
representatives.
Other Products from Alternate Energy Systems, Inc.
Water Bath Vaporizers
Hot Water Vaporizers
Steam Vaporizers
Electric Vaporizers
Electric Water Bath Vaporizers
Venturi Type LPG / Air Mixers
Patented Piston Operated LPG / Air Mixers
Complete Vaporizer / Mixer Systems
Peak Shaving Plants
Gas Stabilization Systems
Accessories for LPG / Air Systems
LPG Pump Packages
Service
Maintenance
Trouble Shooting
Alternate Energy Systems, Inc.
210 Prospect Park P.O. Box 2469
Peachtree City, GA 30269, USA
Phone
Fax
Toll Free
770-487-8596
770-631-4306
800-410-9161
E-Mail
WebSite
[email protected]
www.altenergy.com
Your AES Distributor
AES-VWB-0999-PDF DRAFT
Our Address