Comfort heating in an apartment building
Comprehensive energy system for efficient heat, electricity and comfort in buildings
- Heating heat pump (28 kW)
- eXergiemaschine (various versions: 3-40 kW, wall-mounted or floor-standing appliance)
- Heat buffer (heating storage tank) from varmeco (2 x 1000 liters)
- Home stations from varmeco
- VarCon380M system controller (higher-level heating system controller)
- Photovoltaic system (PV system) with storage
- Inverter for the PV system
- Charging station preparation for electric cars in the underground garage
- Residential ventilation with heat recovery
Thomas Speidel's new apartment building in Weil im Schönbuch offers modern living comfort with low heating costs. Eight apartments (50-110 m²) are equipped with underfloor heating, living room ventilation and a PV system with storage. The innovative heating technology combines a 28 kW heat pump for the underfloor heating (36 °C flow) and the eXergiemaschine for energy-efficient hot water preparation (65 °C). This division of labor ensures high efficiency and hygiene.
In the plant room, two heat accumulators separate the temperature levels, which reduces heating costs. Distribution takes place via a four-pipe system with Home stations, that heat hot water on site as required. A system controller enables monitoring and remote access to further optimize operation. Building owner Speidel and heating planner Michael Leeb from Drieselmann are impressed by the concept, which offers a high level of comfort with low energy requirements.
See here in the Interview as Michael Leeb reports on the advantages of modern heating systems with eXergiemaschinen.
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Frequently asked, simply explained
From a physical point of view, energy is always conserved. However, it consists of usable parts, the exergy, and not directly usable parts, the so-called anergy.
Energy = exergy + anergy
In technical thermodynamics, exergy refers to the part of the energy that can perform work. In heating technology, exergy is the part that leads to heat flows due to the higher temperature level and thus makes space heating and domestic hot water heating possible in the first place.
Exergy, the proportion of energy that determines whether heat is usable, must be given greater focus. After all, exergy optimization is the key to system efficiency.
If the different temperature ranges of a well-stratified water storage tank are completely mixed, the water ends up with a uniform average temperature.
The energy content of the storage tank remains unchanged. During this process, the hot water transfers its heat to the colder water. This means that the exergy that existed at the higher temperature level compared to the average temperature and was required, for example, for
which would be necessary to heat drinking water, has disappeared, irretrievably, irreversibly. Exergy has become anergy. Anergy is energy that can no longer be used (without a new supply of energy). Only by using auxiliary means (e.g. electricity) can it be used again.
exergy arise.
In contrast to energy, exergy can therefore be reduced or even completely destroyed.
The varmeco fresh water technology uses instantaneous water heaters to heat domestic hot water only when required, eliminating the need to store it in a domestic hot water tank and inhibiting the growth of germs (e.g. legionella). The integrated VarCon211 controller only activates the charging pump when drinking water is required, which saves energy and ensures hygiene at the same time.
Thanks to the separation of heating and domestic hot water and adaptive control, the system adapts optimally to daily requirements. The circulation pump control keeps the domestic hot water at the right temperature and prevents the proliferation of legionella bacteria, ensuring a high level of hot water comfort and safety.
The eXergiemaschine recycles waste heat that escapes unused in many businesses and turns it into usable heat. It raises the temperature of the waste heat to a usable level and simultaneously cools the lower part of the heat storage tank, which improves the efficiency of the heat sources. This efficient use saves energy and is easy on both the wallet and the environment.
The eXergiemaschine is a special heat pump that enables high source temperatures and a wide temperature spread. This makes it an ideal partner for renewable energy systems, such as solar thermal and hybrid modules, which work more efficiently and supply more energy.
Questions? With pleasure!
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