Jenroll EXPG
Optimum evaporation capacity
through the flexible chest designed
for thermal fluid oil
Heat exchanger
Burner
* Based on measured flue gas
temperature showing loss of 7%
giving an energy efficiency of 93%.
** Based on a thermal efficiency of 82%
(51–82% measured at 300 sites by
Carbon Trust, UK, 2003).
100%
90%
80%
70%
40%
30%
20%
10%
0%
Integrated gas-fired burner and heat exchanger
External steam
boiler 44%**
50%
Integrated gas-fired burner and
heat exchanger 66%*
60%
Energy efficiency of direct heating vs
external steam boiler
Jenroll EXPG - A winning concept
The Jensen Jenroll EXPG brings a new dimension to
the word “flexibility”. By using a flexible chest
designed for the use of oil as the heating medium
and an integrated gas-fired burner and heat exchanger,
the Jenroll EXPG minimizes the installation and set-up
Jenroll EXPG
Stand-alone operation through integrated
gas-fired burner and heat exchanger
time, enabling a laundry to lift off steam capacity
for other purposes, and to run or expand its flatwork
operation without heavy external piping and boiler
room. The Jenroll EXPG is simply to be set in place
and hooked up to a gas supply. In addition, the
self-contained oil-gas heating concept has proven
to be the most energy efficient concept, as the energy
efficiency of the Jenroll EXPG is 66%, which can be
up to 50% higher than that of a traditional steam
installation incorporating a central steam boiler
operating with an energy efficiency of 44% or lower.
The Jenroll EXPG is a winning concept, ensuring
optimum production and flexibility, and minimum
energy consumption.
Flow diagram
C
E
A
B
D
A
Burner
B
Heat exchanger
C
Expansion tank
D
Pump
E
Chest
1
Low flame
2
Large flame
3
Low flame
4
Large flame
5
Production shut-off
6
Soft stop
Heating cycle
1
2
3
4
5
6
Temperature
T-set
Time
Soft Start 20 Min.
Direct heating
Production
Soft stop
Soft start
Soft stop
The energy for evaporation of water in the
The Jenroll EXPG operates with two power
The Jenroll EXPG is supplied with a soft stop
linen is generated by the integrated gas-fired
outputs designed to ensure soft start on
feature which allows the oil pump to run
burner and heat exchanger. The burner is
heating when the oil is cold. Soft start on
for a period after production stop, thus pre-
supplied with fresh air through an external
heating using a low flame prevents hot
venting superheating of the oil. All together,
air supply, ensuring optimum combustion
spots and superheating of the oil until the
the soft start and soft stop features increase
and longer life time of the burner.
viscosity of the oil decreases and the flow
the life span of the ironer and reduce oil
rate increases.
change requirements.
Optimum flow
The heat energy is transferred to the ironer
Temperature control
High temperature possible
chest by a thermal fluid oil which is circulated
The Jenroll EXPG maintains the set point
By using oil as the heating medium a chest
by a pump. An expansion tank connected to
temperature within +2/-5°C by using an
temperature of up to 230°C is possible,
the heat exchanger and the chest ensures
intelligent burner, thus modulating between
which is 40°C higher than that of steam,
that the optimum oil pressure from heat
a low flame and a large flame depending
when operating at a pressure of 12 bar.
exchanger to the oil pump is maintained.
on production speed. The temperature is set
Furthermore, as standard, the chest
in each category, and the chest temperature
temperature of the Jenroll EXPG is adjustable
can be quickly changed when the production
in each category, thus covering all current
is switched from e.g. cotton to visa.
and future textile characteristics.
A traditional fixed chest loses contact
when the padding wears out and the
roll diameter is reduced.
The vertical pressure of the roll on
the flexible chest makes the sides
of the chest press to the roll and
results in a uniform pressure over
the entire width of the chest.
250°C
100°C
50°C
0°C
Steam pressure 12 bar/190°C
150°C
Oil temperature adjustable up to 230°C
200°C
PADDING
LINEN
CARBON STEEL / INNER PLATE
OIL FLOW
OUTER PLATE
Oil vs steam
Optimum heat transfer
The flexible chest has optimum heat transfer
Flexible chest
Optimum contact angle
Transfer of heat via the oil medium allows
The flexible chest consists of two layers of
A traditional fixed chest looses contact when
for high efficiency – up to 40% higher than
sheet metal welded together in a matrix
the padding wears out and the roll diameter
that of steam. The key to an optimum
pattern by a laser. This sandwich plate is
is reduced, whereas the flexible chest adapts
transfer of heat from the oil into the chest is
rolled to the roll diameter and blasted with
to the actual roll diameter, thus maintaining
a high oil velocity and a turbulent flow com-
high pressure, thus forming small channels
a maximum contact angle. As a result of this
bined with a flexible chest made of carbon
between the weldings. The flexibility of this
stable contact angle a 50% higher evapo-
steel material. Carbon steel has a thermal
sandwich construction allows the adaption
ration capacity can be achieved over time
conduction which is four times higher than
to the actual roll diameter, and due to the
than that of a fixed chest.
that of e.g. stainless steel, maintaining a
relatively low weight of the flexible chest it
higher temperature of the surface and thus a
can be heated in a fraction of the time and
more efficient heat transfer to the linen.
with a fraction of the energy required to
heat a traditional chest. Thus, the tempera-
Low friction
ture of the chest can be quickly changed
Carbon steel gives not only optimum
when the production is switched from e.g.
thermal conduction, but also a low friction
cotton to visa.
with wet linen, resulting in a nice finish.
The low friction also reduces the wear of
padding, ironing tapes and linen, as well
as energy consumption.
Jenroll EXPG
• the finishing line philosophy
JENSEN develops and delivers equipment according to the “Finishing Line
Philosophy” claiming that a finishing
line should form one single system,
as explained in the six steps below:
The JENTROL MMI PLC control system represents the
recent and most advanced PLC control system with
touch screen and multi-language facilities.
Jenroll EXPG is prepared for the state-of-the-art
Management Information System, Jenview.
A
Easy to install
The control panels will give the following
E
High availability
Each Jenroll is equipped with an integrated
information and warnings:
The Jenroll EXPG is based on design criteria
finishing line control, ensuring that both
• Burner status
as described in DIN 4754 for Thermal Fluid
feeder and folder can be easily connected.
• Speed indication
Oil installations. JENSEN has insisted on the
The Jenroll serves as a distribution centre
• T he current (ampere) used by the drive
highest standards of design and components
for all energy supplies to the other
motor (indication starts flashing when
for the Jenroll EXPG. Main compo­nents, such
equipment in the finishing lines.
waxing is needed)
as the chest, rolls, motors and cylinders, are
• Temperature of exhaust and flue gas
built by reputable suppliers in accordance
• Oil level, oil pressure, and oil temperature
with JENSEN’s specifications and Quality
It is possible to control the entire finishing
• Ironing pressure
Assurance.
line from the control panel of the feeder.
• Warning light of cold chest By changing the operating program of
• Warning light of low air pressure
the feeder, the speed of the finishing line
• Pump indication
B
Easy to operate
and the folding program are automatically
F
Operator´s safety
When one of the guards or emergency
buttons in the finishing line is activated, all
D Easy to maintain
rolls are immediately raised and stopped. All
By using maintenance-free technologies
machines in a finishing line are connected
such as e.g. V-belts, frequency inverter,
in the same emergency stop circuit, which
Both the main and the analog control panels
etc., the only maintenance left is keeping
means that in case of an emergency stop,
can monitor the performance of the ironer.
the ironer clean and changing the oil of the
the entire finishing line will stop.
changed.
C
Easy to control
gear boxes.
Jenroll EXPG - a space-saving solution.
9.8 mtr.
Jenroll EXPG 2x1200 in a multi-purpose line
Installation
Call us…
The Jenroll EXPG is a space saving solution
JENSEN is pleased to assist you in planning
JENSEN provides a complete range of heavy-
as the performance of a Jenroll EXPG 2x1200
your laundry providing excellent consulting,
duty equipment for the laundry industry,
incorporating a flexible chest, equals that of
layouts and technical data. Authorized
delivered and installed according to your
a 3x1200 ironer incorporating a fixed chest.
JENSEN distributors or JENSEN engineers
specifications. Please do not hesitate to contact
should carry out the installation to ensure
us for further advice and information, or visit
the correct performance.
www.jensen-group.com
Number of rolls per machine: 1–3
Service
Local contact:
Working widths: From 3000 to 4200 mm.
In addition JENSEN provides an extraordinary
JENSEN USA , INC.
after sales service through a worldwide
99 Aberdeen Loop
network of highly qualified Sales and Service
Panama City · FL 32405
Centers and distributors, all with their own
T (850) 271-5959 · F (850) 271-5901
maintenance and spare parts services.
E sales@jensenusa.com
Space saving solution
Models
* EXPG1x2000 – please require individual brochure.
JenrollEXPG12-USLetter-080326-1
Roll diameter 800, 1200 and 2000* mm.