Capture Bar

1
Capture Bar

Business Owner , BO
Architect , AR
Consulting Engineer, CE
Contractor, CR
2
General

• Restaurant employees are continuously exposed to
  environmental
• tobacco smoke in their work places.

3
General

• The amount of environmental tobacco smoke cannot
  be sufficiently reduced through standard
  ventilation.

4
General

• However, ventilation techniques can
  significantly reduce employee exposure to
  environmental tobacco smoke emitted within
  static workplaces like bars.

5
General

• Legislation limits smoking in
• most of European countries.

6
Capture Bar

• Local ventilation solution for
• bars and restaurants
• Developed to protect restaurant
• employee from environmental tobacco
• smoke

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Operation Principle of Capture Bar
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The Purpose of Air Curtain
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The Purpose of Supply Air
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The Purpose of Exhaust
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CONTROL DIAGRAM Stand-alone Control
Temperature control of air curtain The
temperature set point for air curtain is 28 ºC.
The temperature is controlled based on duct
sensor (TE1) and electrical heating coil (EA1).
The power of electrical heater is proportionally
increased, if the duct temperature decreases
below the set point. Correspondingly, the heater
power is decreased when duct temperature
increases.   Pressure difference switch (PDS1)
shall cut off the heater power (EA1) when the
duct pressure, and therefore the air flow, is
below the minimum limit, set point 10 Pa.   The
duct heater shall be equipped with two
overheating cut-outs. Set point for automatic
reset is 60 ºC and set point for manual reset is
120 ºC. Temperature control of supply air The
temperature set point for supply air into working
area is defined by a manual set point adjustment
(HS2), range 18 24 ºC. The temperature is
controlled based on duct sensor (TE2) and
electrical heating coil(s) (EA2.1, EA2.2). The
power of electrical heater is proportionally
increased, if the duct temperature decreases
below the set point. Correspondingly, the heater
power is decreased when duct temperature
increases.   The pressure difference switch
(PDS2.1) shall cut off the heater power (EA2.1)
and pressure difference switch (PDS2.2) shall cut
off the heater power (EA2.2) when the
corresponding duct pressure, and therefore the
air flow, is below the minimum limit, set point
10 Pa.   The duct heaters shall be equipped with
two overheating cut-outs. Set point for automatic
reset is 60 ºC and set point for manual reset is
120 ºC.   Working area supply air flow shall be
shut off by damper FZ2, if needed.
Bill of materials EA1 Duct heater TE1 Duct
temperature sensor TC1 Temperature
controller PDS1 Pressure difference switch EA2.1
Duct heater EA2.2. Duct heater TC/HS2 Temperature
controller and manual set point adjustment TE2
Duct temperature sensor PDS2.1. Pressure
difference switch PDS2.2 Pressure difference
switch FZ2 Shut-off damper
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Capture Bar Restaurants

• Hotel Seurahuone, Sevilla restaurant, Turku,
  Finland
• Hotel Lappee, Doris night club, Lappeenranta,
  Finland
• Hotel Ilves, Tampere, Finland
• Sports Academy, Iso Omena, Espoo, Finland
• Ale Pub, Helsinki, Finland
• Friday, Helsinki, Finland
• Kumpeli, Heinola, Finland
• Hotel Vaakuna, Kouvola, Finland
• Hotel Vaakuna, Rovaniemi, Finland

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Hotel Lappee, Finland,Doris Nightclub
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Hotel Kumpeli, Finland
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Maintenance
Pull the tray out from the balancing box.
Wash/dry the tray and push it back to the
balancing box until it clips into position.
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Measurement results
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Capture Bar
CFD -animation
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Benefits
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SBB-Air Curtain Unit in Bar Desk
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Materials

• SBB air curtain stainless steel AISI304
• Supply air units painted steel, RAL colours
• Exhaust air units painted steel, RAL colours

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SBB-Dimensions
 
 
  SBB-air curtain unit dimensions (SBB- 400 / 700
/ 756 / 1000)
SBB-air curtain slot dimensions (SBB- 400 / 700
/ 756 / 1000)
 
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Pressure Drop and Sound Data
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Design Instructions

• Air curtain SBB
• Air flow 2025 l/s, run meter
• Slot opening 7 mm
• Air jet about 70o from horizontal level in
  direction of customers
• Cleanable
• Material RST/HFe

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Design Instructions
Testing of air curtain with tracer gas
Too lowjet velocity v 0,7 m/s
Recommendedjet velocityv 3,0 m/s
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Design Instructions

• Standard low velocity units (e.g. AFF) to the
  ceiling above employee
• design air flow about 50-100 l/s,m2
• Placing of supply air either
• back wall
• furniture base
• pillar
• ceiling

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Design Instructions

• Standard exhaust units (EVA, URH etc.)
• installed mainly in smoking permitted area
• air flow rate is depending on total air balance
• recommendation 75 of total exhaust air volume
• from within the smoking area

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Ductwork
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CONTROL DIAGRAMDDC Control System
Temperature control of air curtainThe
temperature set point for air curtain is always
2 ºC higher than actual room air temperature
(TE1). The air curtain temperature is controlled
based on duct sensor (TE2) and electrical heating
coil (EA2). The power of electrical heater is
proportionally increased, if the duct temperature
decreases below the set point. Correspondingly,
the heater power is decreased when duct
temperature increases. The temperature
controller shall cut off the heater power when
the air handling unit is switched off. Pressure
difference switch (PDS2) shall cut off the heater
power when the duct pressure, and therefore the
air flow, is below the minimum limit, set point
10 Pa.The duct heater shall be equipped with
two overheating cut-outs. Set point for automatic
reset is 60 ºC and set point for manual reset is
120 ºC.Recommended air flow rate is 25 dm3/s,
run meter. Temperature control of supply airThe
temperature set point for supply air into working
area is defined by a manual set point adjustment
(HS3), range 18 22 ºC. The temperature is
controlled based on duct sensor (TE3) and
electrical heating coil (EA3). The power of
electrical heater is proportionally increased, if
the duct temperature decreases below the set
point. Correspondingly, the heater power is
decreased when duct temperature increases. The
temperature controller shall cut off the heater
power when the air handling unit is switched off.
The pressure difference switch (PDS3) shall cut
off the heater power (EA3) when the duct
pressure, and therefore the air flow, is below
the minimum limit, set point 10 Pa. The duct
heater shall be equipped with two overheating
cut-outs. Set point for automatic reset is 60 ºC
and set point for manual reset is 120
ºC.Recommended air flow rate into working area
is 50 100 dm3/sm2.  
CONTROL PANEL AUXILARY DEVICES MOTOR CONT
ROL CENTER

DI, AlarmDI, Indication DD AIAD
SUPPLY FAN

SUPPLY AIR TEMPERATURE 18...22oC
CURTAIN AIR2oC OVER ROOM TEMPERATURE
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Developing the Solution

• Computerized flow simulation (CFD) was utilized
  in the development of the system
• Tracer gas measurements were used in optimisation
  of the system
• Regional Institute of Occupational Health has
  tested the system in hotel Lappees nightclub

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Developing the Solution
Tracer gas measurements in laboratory
Smoke tests in laboratory
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Field Surveys
Hotel Lappee, Doris Night Club
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Hotel Lappee, Doris Night Club

• Restaurant is divided to smoking and non-smoking
  areas without separation walls or other
  arrangements preventing smoke flow
• Another bar desk is situated within a smoking
  area and another in non-smoking area
• Customers 430
• Area 529 m2
• Volume 1517 m3

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Measurement pointsin Night Club
N Nicotine measurement M Tracer gas
measurements H Particle measurement 1. Bar
working area 2. Bar working area 3. Exhaust
air 4. Bar desk customer area 5. Bar working
area 6. Customer area ceiling
N
HNM
MH
MNH
M H
M H
M
1.
4.
5.
2.
3.
6.
smoking prohibited area
Hotel Lappee Doris
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Field Surveys
Particle measurement (H)Laser particle indicator
in the ceiling of customer area
Tracer gas emission (M)Emission outlets in the
bottom of the bar desk
Nicotine measurement Dose indicatorin the
breathing zone ofemployee
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Measurement Methods

• Tracer gas methods
• Step down method
• Step up method
• Particle analysis
• Temperature measurements
• Nicotine measurements
• Air flow rate and velocity measurements

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Tracer Gas Measurements
1. Bar working area2. Bar working area3.
Exhaust air4. Bar desk customer area5. Bar
working area6. Customer area ceiling
Tracer gas SF6 concentration (ppm)
Time
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Field Survey Results

• Hotel Lappee, Doris night club
• It was possible to reduce working area nicotine
  concentration
• to 1/10 from average restaurant
  concentrations
• Up to 95 protection efficiency

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SBB Air Curtain Part List
1.
One unit consist of 1. Balancing box (1
pcs) 2. Slot (1 pcs) 3. Tray (1 pcs) 4. Fixing
bracket (2-3 pcs) 5. Fixing bolt M5 (2-3
pcs) 6. Fixing list (a/b) depending on the
assembly
5.
4.
2.
6.
3.
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SBB Air Curtain Installation tothe Bar Desk
1. Dismantle the tray from the balancing box.
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SBB Air Curtain Installation tothe Bar Desk
2. Place the balancing box under the desk plate.
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SBB Air Curtain Installation tothe Bar Desk
3. Fix the front of the box to the desk with
screws.
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SBB Air Curtain Installation tothe Bar Desk
4. Check the horizontal straightness of the box.
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SBB Air Curtain Installation tothe Bar Desk
5. Fix the back of the box to the desk plate or
to the front panel of the desk with screws.
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Slot Installation
6. Set the slot to the desk opening so that
Halton-logo is readable from customer side.
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Slot Tightening
7. Tighten the screws equally.
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Slot Tightening
8. Tighten the slot equally to the desk with
fixing brackets.
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Installation of the Tray
9. Put the tray back to the balancing box.
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Connecting the Supply Air Ductwork to the
Balancing Box
10. Connect the supply air ductwork to the
balancing box and adjust the airflow.
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Commissioning and Maintenance

• Adjusting air flows before commissioning
• Cleaning of air curtain unit trays

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Benefits of Capture Bar

• Employees and customers exposure to tobacco smoke
  
• reduces
• Cleaner indoor air improves satisfaction, health
  and
• job productivity

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Benefits of Capture Bar

• Capture Bar is suitable for different kinds of
  bar desks and spaces
• The system can be integrated aesthetic both for
  new and renovated locations
• Capture Bar is a tested solution easy to design
  and to install

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Benefits of the Capture Bar

• The standard connections help installation of the
  units
• Air flows are adjustable fast and exactly

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Capture Bar Acquisition

• Halton
• Offer and ja layout drawings
• Delivery
• drawings for the desk
• manufacturer
• devices and installation
• instructions

• Customer
• Request for a offer
• plan and cross
• section drawings
• Order

Co-operation Architect/interior designer, bar
desk manufacturer, HVAC designer,
electricity/automation designer, HVAC contractor,
furnishing contractor