How the protection of the global climate leads to new climate concepts for trade chains.
Since 1st January, new statutory minimum requirements of the energy efficiency of air conditioning units have been in place. It goes without saying that trade chains are also affected – in new buildings and conversions, they have to adapt their ventilation-technical concept.
The UN Climate Conference took place in Paris at the beginning of December 2015. Against all fears, the conference was a success: the 195 participants agreed upon a global climate agreement, the aim of which being to reduce global warming to 2 degrees Celsius and if possible, to 1.5 degrees Celsius. An important step for the whole world. And finally, the general recognition that climate change is a reality made by humans. Yet a piece of paper still doesn’t have any effects on CO2-emissions, or the ErP Regulation of the European Union. The implementation of this law reached its first level in ventilation technology on 01 January 2016. A level that appears to be high especially for many trade chains, but it says, amongst others, that “all centralised ventilation systems must have a HRS” – meaning that dual-direction ventilation systems must be equipped with heat recovery systems from now on. This has far-reaching consequences. After all, climate concepts that have been established for years are now obsolete. When working out a new energy strategy, prudence and a sense of proportion are required. On the one hand, ErP-conform solutions are as high in number as they are different in terms of quality and money and, on the other hand, the concept should also fulfil the second level of the Eco Design Regulation valid as of 2018.
Kampmann has been an esteemed partner of all kinds of trade chains for many years. What the staff from Lingen do goes far beyond the manufacture of products for heating, air conditioning and ventilation. Rather, Kampmann see themselves as consultants that can empathise with the special concerns of market operators, investors, planners and performing businesses, and who work out the respective ideal solution and make it repeatable – which naturally also applies to the ErP-conform solution. Yet what does the regulation actually mean for market operators?
"All centralised ventilation systems must have heat recovery system.”
The EU Regulation no. 1253/2014 “with regard to the environmentally-friendly design of ventilation units” covers various points. Among others, it defines the regulations for fan efficiency and for the maximum power consumption of the unit. A decisive point because it is far-reaching, is the obligation to equip two-way ventilation units with a heat recovery unit. Established unit configurations that have been installed many times without a heat recovery unit may no longer be sold or used. The consequence for trade chains: central ventilation units with outgoing and ingoing air fan will not only become more expensive thanks to the heat recovery unit, but will become, without further consideration, larger, a fact that when installed inside a building, necessarily leads to higher building costs. The permitted installation of a one-way ventilation unit as per the ErP often turns out to be uncomfortable and impractical. In this case, the air exchange may only take place via one air path, either as external air supply or as output air supply. Depending on the system, there is either over- or underpressure in the room, and it is hardly possible to control the air flow as well as the distribution of air.
The smartest and most efficient solution is without doubt Kampmann’s Hybrid ECO System – not only for trade chains. With this solution, the outdoor air supply is separated from the heating unit. A centralised ventilation unit with heat recovery system designed only for outdoor air requirements supplies the decentralised units with fresh outdoor air. They then take care of the final heating stage. In comparison to the common solution, where the heating takes place in the centralised ventilation unit, the Hybrid ECO System brings along crystal clear advantages:
Due to the fact that the centralised ventilation unit is only used for air exchange and does not actively heat, it can be designed significantly smaller.
As the temperature is controlled via the decentralised units, the duct system only needs to supply fresh air. This results in significantly smaller ducts and the air outlets can be omitted. The decentralised units take over this function.
In comparison to the centralised unit, the decentralised units only have a fraction of electrical consumption and fulfil the task of heating much more efficiently than a centralised solution.
Fresh air is thus supplied exactly as required. If the need for fresh air is covered, and yet it has to be heated or cooled, the decentralised units switch into secondary air mode. This way, the filters in the centralised unit are also preserved.
Air conditioning with the Hybrid ECO System is thus highly efficient as it separates the tasks of ventilation and heating/cooling from each other and manages it exactly in line with demand. This system conception can be effectively applied in equal measure irrespective of the size of the sales room.
As an example, let us state a larger market that was awarded the “Green Building” certificate of the European Commission: Elements for the certification are an own block-type thermal power plant, an optimally insulated building shell, lighting with LED lamps and daylight as well as the Hybrid ECO System. Six centralised ventilation units by Kampmann’s associate company NOVA cater for the ventilation. The degree of efficiency of the integrated heat recovery via double-plate exchangers is 84 percent. The fresh air requirement is determined via the CO2 sensor. TOP unit heaters and Galaxis radiant ceiling panels are used as decentralised unit, which heat 10,000 square metre of sales area. The whole system is so efficient that it falls below the requirements of the Energy Saving Regulation considerably more than 25 percent. The observation of the Eco Design Regulation in this case speaks for itself.
As tailored to meet a market need as the Hybrid ECO System is, the same applies to the range of suitable components. From the Airblock FG for installation in the false ceiling of a small boutique to a roof device for large volume flows, there is the right ventilation unit for every size of market. Each of them can be combined with various decentralised units at will and can be conveniently controlled via the room automation system KaControl and integrated in the building control system.
Photo: UN Climate Conference by JJ Georges – CC-BY-SA 4.0