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Kitchen System Ventilation Design

John Herbert | Director

For F&B and catering industries the kitchen ventilation system is a critical part of your operation.

kitchen ventilation design :: Kelcroft

Kitchen exhaust hoods need to perform one function, to capture - they must catch and hold the heat, smoke, products of combustion and exhaust, allowing the kitchen extract system to draw and discharge the vitiated air in a safe location.

The performance of the kitchen extract system needs to consider the entire air balance of the facility, the kitchen should be maintained at a slight negative pressure to prevent odours entering the dining area, and the appropriate planning for replacement air is equally critical.

Air Cleaning

Kitchen exhaust systems must not disturb the environment, or your neighbours. Therefore the selection and design of air cleaning equipment is required to scrub and remove contaminates out of the kitchen discharge air flow. 

Energy Conservation

It is a guiding principle that no detail is insignificant, for example Kelcroft will verify the efficiency and power consumption of every motor - because every watt counts. Investigation options for process delivers significant efficiency benefits.

Kelcroft delivering the information you need when you need it

Let's consider ventilating an air-conditioned kitchen with an fan and electric drive motor as an example, affectionately known as watt watching, whole system design provides accumulating consequential benefits, a smaller energy efficient motor would mean:

  1. reduced purchase cost
  2. smaller cable and fuse sizes
  3. reduced electrical distribution costs
  4. reduced power consumption
  5. less power = less heat
  6. reduces cooling demand
  7. smaller cooling fans
  8. smaller cooling fans = lower consumption
  9. reduced load = small ductwork
  10. smaller air conditioning plant
  11. reduces chiller power consumption
  12. smaller pipework
  13. reduced chiller installation cost
  14. requires less plant space
  15. less environmental impact
  16. reduced carbon discharge
  17. lower emissions

And that's just for one motor, now imagine an integrated whole system design repeated for every key decision! and you will realize that real capital and operating cost savings accumulate quickly.

And there is more, consider a typical planning approach more often than not equipment was arbitrarily positioned, whole system thinking means we must examine the long term impacts of mundane decisions that were often overlooked in the past.

Optimizing equipment, locations, and the required E&M services saves you money. It saves the initial capital cost, and more importantly saves operating for every year thereafter.

A smarter approach to deliver cost effective solutions in the real world. I'll leave you with one further example, consider the total lifetime cost of a duct elbow. A typical elbow has a pressure loss factor (K factor) of say 1.5, that means every elbow is equivalent to an extra 1.5 metres of pipework.

Once it is installed it is too late, you are committed to suffer the loss. The elbow has only one goal, redirecting flow causing a pressure drop, and that requires additional fan power to overcome the pressure loss it creates every year. Also that larger fan means extra cost, for materials, equipment and the larger capacity electrical distribution.

Now imagine the power consumption savings if fifty percent (50%) of the elbows were engineered out at the design stage! that's the real power behind whole system design - keeping more money in your pocket every year.

Call today

For further information regarding Kelcroft's design and consulting services, call today, our Hong Kong office telephone: +(852) 2335 9830, send us a fax +(852) 2335 9862, or send us an email message