In the past, only a fraction of the energy-saving potential was exploited, as the return air from kitchens is always strongly contaminated. Fatty aerosols are often carried into the system despite separation and filtering. This leads to an extremely high level of maintenance effort for filter changes and cleaning. Similarly, owing to the design, the required thorough cleaning, including the heat exchanger, is not possible in full in many central air conditioning units. As a result, fat deposits can lead to malfunctions and even cause the heat exchanger to breakdown due to blockages. For these reasons, a central air conditioning unit with heat recovery is not used in many kitchens – so that every day, valuable energy is "thrown out of the window". This is a pity, as the waste heat from the kitchen is enough to supply most of the rest of the building with energy.
Menerga has developed an innovative, fully automatic cleaning system specifically for the catering field, with which the highly efficient central air conditioning units of the Adsolair range can be used without difficulty for heat recovery in kitchens and commercial kitchens. Through the holistic planning of ventilation ceilings and central air conditioning, it is possible to recover almost all of the waste heat from the kitchen. It goes without saying that the requirements placed on the indoor air, as stipulated in VDI 2052, are fulfilled. One of the purposes of this is to prevent the spread of unpleasant odours in the kitchen and the adjacent rooms by quickly and reliably leading away the contaminated air. A second advantage is that the working conditions for the kitchen staff are pleasant with respect to the air temperature, humidity and speed.
Hotels are small, independent microcosms – a continuous changeover of people with a wide range of requirements is found here in a number of different types of rooms. The requirements placed on a good and efficient hotel air conditioning system are correspondingly varied.
In the basement, food has to be kept at exactly the right temperature, while in the conference rooms it must be possible to switch from "break" to "ready for operation" within a very short time, and in the hotel rooms the guests want to decide themselves how warm or cold it should be. Additionally, the smells from a delicious meal should remain in the kitchen if possible and not greet the guests in the lobby. The air conditioning of a hotel crucially depends on the occupancy level – and in turn, the occupancy level depends on good air conditioning. Each room has its particular features. If there is also a swimming pool available, the well-being of the guests and protection of the fabric of the building depends not only on the air conditioning and ventilation, but also dehumidification in line with requirements. There is usually not much space available for technology, and architecture of the external facade should not be spoilt by ventilation technology components. And very importantly: the equipment that creates a good climate should be as quiet as possible so that the guests are not kept awake by the noise at night.
The air conditioning of a hotel provides the hotel operator with a competitive advantage on the one hand through the creation of a "comfortable climate", but on the other hand it also makes up a large share of the energy costs. This is where energy-efficient, state-of-the-art concepts are required which incorporate all aspects of the local situation. For example, is it possible to use the waste heat from the kitchen for heating up the water? Are there heating and cooling requirements at the same time within the building? Or can solar thermal energy be used for cooling? Many requirements – one solution: Menerga.
While hotel guests and staff enjoy the perfect climate in every room without realising it, the systems work out of sight in the plant room under varying workloads in order to meet the highest requirements. It goes without saying that the noise produced is kept as low as possible thanks to the efficient technology and use of sound attenuators.
Menerga systems are designed to be compact and ready for use and are also suitable for plant rooms where other technology could not be housed. Whether ThermoCond for the efficient dehumidification and air conditioning of swimming baths or Resolair for producing a climate with the highest heat recovery efficiency– one thing that all the systems have in common is the approach of the minimal application of energy. For this, Resolair systems use the approach of regenerative heat recovery, with which it is also possible to recover moisture. This technology achieves the highest heat recovery efficiency currently known! In the planning process, it is not the location of the system which is the starting point for the procedure, but the overall complex: Where is which form of energy required, and how can this be made available and used in the most efficient manner possible? Every system is aligned to the specific application. For example, if there is a saline pool in the hotel swimming baths, the air-conditioning technology must be able to cope with the more aggressive air. For this, Menerga has developed the special units of the ThermoCond series. Together with the planner, we search for the best possible solution for your hotel. A consistently good climate also has a positive effect on customer loyalty. Because the guests will only return if the climate is right.