Voclean Ecology Unit

VOClean Ecology Unit

Ecology Units Why? Ecology units are ventilation equipments whose use is recommended in kitchen exhaust systems, which serve to clean greasy and dirty exhaust air. With the increase of environmental consequences in the 21st century, severe restrictions have been imposed on the release of industrial wastes to the environment, and particularly on the release of flue gas and kitchen exhaust systems to the atmosphere. It is known that the volatile organic compounds (VOC) and other particular based substances in the kitchen exhaust systems creates a huge pollution in the air. In many countries, significant restrictions have been imposed on the release of odorous substances to the atmosphere by the regulation issued by the Ministeries of the Environment. With the introduction of the new residential concept in big cities the rise in so-called “all-in-one” projects has led to some problems with air quality. This is because the concentrated kitchen exhausts from the large restaurants and dining areas in these projects have a negative impact on the daily functioning of people occupying the residential, office, and hotel areas that are in close proximity to these areas. In the absence of measures, the accumulation in ducts exhaust equipment of substances such as grease, soot and smut that are released during cooking raises fire risk to high levels later on. In addition to fire risk, the accumulation of these substances causes the intake fans and filters to be quickly clogged, the ducts to be quickly contaminated and consequently lead to a rapid rise in expenses. To meet the needs born of all such problems the German VDI 2052 and British DW/172 standards have been created, specifying some requirements for kitchen exhaust systems. The subjects that are assigned particular importance British Defra is in the following page: When the Environmental Protection Act 1990 was brought in, ‘’an Act to make provision for the improved control of pollution arising from certain industrial and other processes’’, Councils up and down the country had the power to enforce pollution levels across their broughts. In 2004 Netcen, an operating division of AEA Technology Plc was asked to produce a report on behalf of the Department for Environment, Food and Rural Affairs exclusively covering Guidance on the Control of Odour and Noise from Commercial Kitchen Exhaust Systems and in January 2005 the DEFRA Guide was published. Objectives in odour control according to DEFRA are the following.

1. New facilities that are in the design stage must be designed in a way that ensures they cause no damage to the environment. 2. Existing facilities that were commissioned without odour control must be re-designed in accordance with best feasibility principles, in a way that ensures they cause no damage to the environment.

4 5 Design Criterias The most significant design criterion in the selection of ecology units is the type of catering establishment. Since the amount of grease, steam, and particles in the exhaust air will vary according to the type of food cooked, different models should be selected for various kitchens. Thus, we can divide common catering establishment types under four main headings according to the density of odour and grease. This classification as low, medium, high, and very high density kitchen types can be seen in the following table.

Odour Density Grease Density

Low Medium High Very High Low Medium High Very High

Tea Shop/Cafe   Pizza   Steakhouse   French Restaurant   Italian Restaurant   Pub/Bistro   Far Eastern Cuisine   Indian   Thai   Vietnamese  

Kebab Shop/Tradition-   al Turkish Cuisine Fast Food/Fried Food  

In the light of these information; different levels of control are being applied for different concentrations of odour and grease. Despite there are other evaluation criteria, these control methods of odour and grease can simply be listed as: Low Concentration: Standard kitchen exhaust fans suitable for continuous high temperature operation would be sufficient. Medium Concentration: Electrostatic precipitator followed by carbon filtration with 0.1 second contact period. High Concentration: Two stage electrostatic precipitator followed by carbon filtration with minimum 0.2 second contact period. Very High Concentration: Two stage electrostatic precipitator followed by carbon filtration with minimum 0.2 second contact period and UV ozone system or carbon filtration with minimum 0.4 second contact period.

6 How Electrostatic Precipitator Works? In an Ecology Unit, the most crucial part is Electrostatic Precipitator. These components are shortly called as ESP and most of the dust and grease particules are being trapped by these components. The below diagram shows, in a basis visual, how an electrostatic precipiator works.

Dirty Air Clean Air

Pre-Filter Ionizer Collector Post - Filter

As air passes into the combined ioniser / collector cell, the particulates in the air stream are polarised to a negative potential. As they continue through the ioniser and between the collector cell plates, the polarised particulates are repelled away from the negatively charged plates and attracted to the earthed plates where they stick and so are filtered out of the air flow.

High Efficient Plug Fan Activated Carbon Filter Bag Filter Removing odour from the In order to provide a longer exhaust. High dwelling time life for the Activated Carbon filter.

Post Mesh Filter

High Efficient Electrostatic Precipitator

Removing grease, moisture and other particles from the exhaust air by ionizing the particules.

Pre Mesh Filter

7 Unit Properties

VOClean VOClean VOClean VOClean VOClean VOClean VOClean VOClean VOClean 110 120 215 220 230 240 330 340 440

M H/EH M H/EH M H/EH M H/EH M H/EH M H/EH M H/EH M H/EH M H/EH

Flow Rate (m³/h) 2500 5000 7500 10000 15000 20000 22500 30000 40000

Bag Filter Stage 1 x F7 1 x F7 1 x F7 1 x F7 1 x F7 1 x F7 1 x F7 1 x F7 1 x F7

Carbon Filter Stage 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 Cartridge Length 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 (mm) Minimum Contact 0.1 0.2 0.1 0.2 0.1 0.2 0.1 0.2 0.1 0.2 0.1 0.2 0.1 0.2 0.1 0.2 0.1 0.2 Duration (s)

ESP Stage 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 ESP Power 20 40 30 60 50 100 60 120 40 80 50 100 40 80 150 300 200 400 Consumption (W) Voltage / Phase / 400V 3ph 50Hz Frequency Fan Motor Power* 1.1 1.5 3 3 4 4 5.5 5.5 7.5 11 11 15 11 15 15 18.5 18.5 22 (kW)

M: Moderate H/EH: Heavy / Extra Heavy

* Fans were selected at 300 Pa external pressure drop.

Efficiency Graph

105

100

VOClean VOClean VOClean VOClean VOClean VOClean VOClean VOClean VOClean 80 110 120 215 220 230 240 330 340 440

75 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000 13000 14000 15000 16000 17000 18000 19000 20000 21000 22000 23000 24000 25000 26000 27000 28000 29000 30000 31000 32000 33000 34000 35000 36000 37000 38000 39000 40000

Systemair reserves the right to modify these values. Please contact Systemair Sales Offices for exact unit selections.

8 Models/Dimensions

w w b L d a H c

L L H W a b c d

VOClean 110 2708 745 550 510 450 510 450 VOClean 120 2824 745 1000 510 900 510 900 VOClean 215 3101 1260 1000 1010 900 1010 900 VOClean 220 3101 1260 1000 1010 900 1010 900 Moderate VOClean 230 3223 1260 1450 1010 1350 1010 1350 VOClean 240 3347 1260 1900 1010 1800 1010 1800 VOClean 330 3452 1775 1450 1510 1350 1510 1350 VOClean 340 3626 1775 1900 1510 1800 1510 1800 VOClean 440 3876 2290 1900 2010 1800 2010 1800

w c L d e a H

L L H W a b c d

VOClean 110 4258 745 550 510 450 510 450 VOClean 120 4374 745 1000 510 900 510 900 VOClean 215 4651 1260 1000 1010 900 1010 900 VOClean 220 4651 1260 1000 1010 900 1010 900 Heavy VOClean 230 4773 1260 1450 1010 1350 1010 1350 VOClean 240 4897 1260 1900 1010 1800 1010 1800 VOClean 330 5002 1775 1450 1510 1350 1510 1350 VOClean 340 5176 1775 1900 1510 1800 1510 1800 VOClean 440 5426 2290 1900 2010 1800 2010 1800

9 Configurations

Odour Density

Configurations Medium High Very High

Moderate  Heavy   Extra Heavy   

Moderate

Heavy / Extra Heavy Systemair VOClean section configurations have been designed to consider the possibility of change of cooking appliances type. According to this, the model that is selected initially in the moderate configuration can be subsequently converted to heavy or extra heavy with the addition of different sections. Automation Features

VOClean units are being manufactured with factory mounted control panel. A frequency inverter is located in the panel in order to supply the optimum exhaust airflow. Airflow can be reduced by a potentiometer connected to the automation panel for the basic control or advanced control unit choice. Demand controlled kitchen ventilation can be done with sensors below. Sensors may reduce the fan speed when necessity is low at the kitchen. Thus, power consumption and heat losses can be minimized. • Temperature sensor: Measures the temperature of exhaust air at kitchen hood. Measuring cooktop temperature with infrared sensors is also possible. • Optical sensor: Measures amount of smoke and humidity of exhaust air at kitchen hood.

Available Accessories

Potantiometer Sound Attenuator

Hepa Filter UV-C Lamp

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