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Reference project
Jernhusen cleans the extract air at Burger King with ozone
Introduction.
Built-in air purification keeps the duct channels clean
Jernhusen owns, develops and manages train stations, station areas, maintenance depots and freight and combination terminals along the Swedish railway. Jernhusen is a commercial real estate company founded in 2001 and owned by the Swedish state.
Burger King is a tenant in the Stockholm Central Station property. In all large kitchens, fat deposits are built up in the ducts which must be cleaned with high-pressure washer regularly to reduce the fire risk. Jernhusen wanted to reduce both the fire risk and the spread of cooking odors in the surrounding area and therefore chose to install an Ozonetech system for air treatment.
The problem.
Jernhusen needed to reduce the risk of a kitchen fire, and to be able to recycle the heat energy in the exhaust air. Jernhusen also saw an opportunity to avoid the costs of cleaning the ductwork.
The solution.
A high-performance Ozonetech RENA Kitchen Solutions was supplied to clean the entire airflow, from Burger King’s two large kitchen hoods installed above fryers and grills. Concentrated ozone is injected directly into the kitchen ducts to effectively eliminate fat and odor particles. The ozone is produced on-site by an ozone generator which allows ozone to be distributed to one or several hoods, giving great freedom to place the equipment. The system only requires electricity and oxygen from the ambient air to produce ozone. The process is fully automated, and nothing needs to be replenished regularly.
Evaluation.
The Ozonetech air treatment system purifies the exhaust air from grease and thus normal buildup of grease on the ventilation duct walls are avoided. This reduces the risk of fire to a minimum and the need for manual cleaning of the duct walls is greatly reduced.
The purification system has also significantly reduced the odor problem. Ozone purification is a proven way to increase fire safety, reduce costs and avoid the spread of cooking odors. In addition, the opportunity is created to install heat exchangers and recover the heat energy in the heated air.
In addition to reducing the fire risk and the spread of cooking odors, the solution has also enabled efficient energy recovery. Large kitchens consume large amounts of energy, they are real “energy thieves” and the heat energy in the extract air accounts for a large proportion of energy consumption. Today we have a plate heat exchanger in the flue which recycles about 65% of the heat energy in the air.
The benefits of installing ozone treatment in restaurant kitchens are many and an ozone system can save tens of thousands of dollars a year. Once the equipment is installed and in operation, which goes very quickly and smoothly, hardly any maintenance is required as the system is self-propelled and does not require operational personnel on-site.
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