How much energy does the heat recovery contribute as long as the system actually runs?
How is it in the event of a partial load or a certain condition of external air?
The air energy meter can continuously provide this kind of information by measuring (supply air) mass flow and enthalpy before and after the “heat recovery”.
There are various strategies and principles to control central air-conditioning devices. When comparing them, you especially ask yourself how much useable thermal energy is actually delivered. With the aid of the air energy meter, you can analyse how much useful energy is contributed at each individual stage of air treatment, e. g. heating, cooling, heat recovery, etc. You can also view a total of useful energy contributed at all stages of air treatment.
The Technical Town Hall of Freiburg is created as one of the most modern administration buildings in Germany. The building impresses not only with its attractive architecture, but also with a high standard that it should meet - to be a "positive-energy house” that annually delivers more energy than it consumes.
In order to also ensure maximum energy efficiency for the top-class air-conditioning technology, the building user (Fraunhofer ISE Institute) relies on technical solutions from Luftmeister. For example, in the large central air-conditioning system, enthalpy sensors are installed both before and after each relevant air treatment stage. The air energy meter measures mass flow rates in the supply air and exhaust air. You can add up to five enthalpy sensors to each air energy meter so that you can determine energy contributed at each of four treatment
stages. Based on these energy rates and many other instantaneous values (flow rate, temperature, humidity, static pressure, etc.) also delivered by the air energy meter, the building user can optimise energy consumed by the air-conditioning system.