Want to discover other Halton technologies?
Back to Innovatives Technologies   >  Capture Jet™ (hoods)  /  Capture Jet™ (ceilings)  / M.A.R.V.E.L. /  Capture Ray™  Cold Mist On Demand  /  Water Wash  /  Cyclonic filter   Halton MobiChef 

The M.A.R.V.E.L. system* is packed full of technological innovations,which best represents the Halton High Performance Kitchen (HPK) concept. This is the first truly intelligent, responsive, and completely flexible demand controlled ventilation (DCV) system specifically designed for hoods and ventilated ceilings.

M.A.R.V.E.L., in combination with Capture Jet™ technology, offers the lowest levels of energy consumption currently possible and provides complete comfort for users.

* Model-based Automated Regulation of Ventilation Exhaust Level.

Cooking appliances off, idling or in cooking mode: M.A.R.V.E.L. makes the difference!

M.A.R.V.E.L. is based on the innovative and patented technology of Halton's IRIS™ infrared sensors. Integrated into every Capture Jet™ hood in a kitchen, IRIS™ sensors "scan" the surface of the cooking blocks to determine, in real time, the status of the appliances: off, idle or cooking. M.A.R.V.E.L. is then able to continually adjust the exhaust airflow rate to be extracted on every hood, depending on the actual needs.

Discover how M.A.R.V.E.L. also differentiates between a grill and a combi oven?

Grill or Combi oven, M.A.R.V.E.L. always responds accurately to the individual needs.
When a grill in idle status is charged with hamburgers, its surface temperature decreases suddenly and temporarily. This is what's called a "negative peak". Now let's consider a combi oven. It can be considered in idle position when it is on and door closed. Whether it is loaded or not with food, when the door is opened, the steam expansion generates a so called "positive peak".

M.A.R.V.E.L. performs a permanent and continuous cross check of the information coming from the IRIS™ infrared sensors, the room temperature sensors and the temperature sensors integrated in the exhaust plenums in the hoods or ventilated ceilings. It is then able to appropriately and accurately adjust the exhaust airflow rates for any type of cooking appliance depending on positive or negative peaks. It also keeps the exhaust airflow levels safe until the cooking appliances change status (off > idle > cooking or cooking > idle > off).

M.A.R.V.E.L. continues to differentiate itself: One hood can switch to maximum airflow, whilst all the others stay at minimum airflow.

In order to get such an efficient and delicate airflow control, every M.A.R.V.E.L. Capture Jet™ hood is equipped with a balancing damper. Whether the kitchen ventilation is managed by one or several fans, every hood is totally independent. If one hood needs to switch to the maximum airflow, all the others remain dedicated to their own requirements (be that minimum or intermediate airflow).

Traditional systems on the other hand soon find their limits: with entire cooking areas switching as a whole to maximum airflow. The bigger the kitchen, the longer one fan operates at maximum speed. For example within the ten hood sections of a kitchen, there's almost always one section at least in cooking mode. That is a fact. 

How does M.A.R.V.E.L. do it?


ABD balancing dampers - another key point!
Every hood section or ventilated ceiling exhaust plenum is equipped with an ABD balancing damper. It has been designed to efficiently adjust the exhaust airflow rate with minimum pressure loss and impact on the sound pressure level. Every ABD damper is driven by its own controller. If the controller is "independent", i.e. able to adjust the exhaust airflow rate without "external intervention", it informs, in real time, one central calculator of its position. M.A.R.V.E.L. then has a detailed and comprehensive view of the whole system. This constitutes a decisive asset in managing the fans, as is explained below.

In the battle of figures, you can be sure that M.A.R.V.E.L. represents the highest savings on air-conditioning!

All the tests we've carried out in our R&D laboratories and the measurements we've made on site prove that M.A.R.V.E.L. reduces the exhaust airflow rates by up to 64% for hoods and 53% for ventilated ceilings. These are very tangible results. Depending on the weather conditions, it represents around 50% savings on the energy consumption required to air-condition one kitchen.

It is very easy to get into a numbers game and there is little point hurling figures. Because, the reality is, as explained above, M.A.R.V.E.L. is a completely unique system able to adjust the exhaust airflow rates exhaust plenum per exhaust plenum - on hoods or ventilated ceilings. M.A.R.V.E.L. ultimately and inevitably saves you more than the other DCV systems.

 

In the battle of figures, you can also be sure that M.A.R.V.E.L. represents the highest savings on exhaust fan consumption!

The amount of electricity consumed by fans can represent a significant proportion of the overall energy required to operate the ventilation system of a professional kitchen. Using a DCV system leads to a big variation in the exhaust airflow rates and does in fact require a constant adaptation of the fan speed.

Traditional fan speed control systems create massive energy wastage. M.A.R.V.E.L. declares war on this loss!

What makes M.A.R.V.E.L.'s fan speed control algorithm different?

How can it create massive electricity savings?

 


What makes M.A.R.V.E.L.'s fan speed control algorithm different?

Traditional DCV systems are based on a so called "constant pressure" control logic. Simply put, the control system is designed to maintain the pressure of the fan at the same level, whatever the exhaust airflow rate required. Basically, it means that this pressure level has to be determined based on the worst operating case: the cooking peak where all the hoods or ventilated ceilings are at the maximum exhaust airflow rate level. The result is pretty clear: outside of the peak cooking period, which has a limited duration, the pressure is much higher than is actually needed. It results in a huge waste of energy.

M.A.R.V.E.L. fan speed control algorithm plays with both the exhaust airflow rate and the pressure of the fan(s). Every single hood or ventilated ceiling exhaust plenum is connected to a sort of "private network". As a consequence, M.A.R.V.E.L. knows at any one time what the real needs are - in terms of exhaust airflow of every plenum and the position of its balancing damper. It is then possible to adjust the speed of the fan to get the exhaust airflow rate on every plenum, with the maximum opening for all the dampers. It ensures that all the exhaust plenums keep the exhaust airflow that is actually required, with the lowest possible pressure and rotation speed of the fan.
 

How can it lead to massive electricity savings?

The electricity consumption of the centrifugal fan is proportional to the cubed number of the rotation speed. Consequently, a fan that operates at 60% speed (and volume) has only 22% of the nominal power consumption.

By permanently adjusting the speed of the fans to the lowest possible level, M.A.R.V.E.L. provides the highest possible savings on their electricity consumption.

An average payback time between three to five years.

M.A.R.V.E.L. represents a far bigger money saving potential than a traditional DCV system. Can you really afford not to take advantage of such an increase in profitability? Especially when it's within such easy reach.

Thanks to the radical reduction in the energy consumption required to air-condition a kitchen, combined with the reduced energy consumption of the fans - the average payback time on investment is around three to five years. Ask for a payback time analysis from your nearest Halton sales office.