Referenzen Case Study e-con AG, Memmingen
  • Facts

  • 8 M-bus-gateways
  • 1 radio control center
  • 3 Funk-Repeater
  • 8 Gebäude mit mehreren Etagen
  • 1 Tag Umsetzungszeit

Finally a radio system that works

Convenient, fast and wirelessly from the network. This is how the contracting company e-con AG, a subsidiary of Alois Müller Group, accesses thermal energy data remotely. And calculates the actual amount of heat consumed by their residential owners. For that purpose, they opted for a modern radio system of the company merkur Funksysteme AG.

Heating systems cause high investment costs. This is generally known. Therefore, the communal use of a local heating network is meaningful for individual objects: Consumers purchase only as much heat as they need. Cost-effective and convenient. Furnaces or central heating are no longer necessary. Anyone who builds a residential property today, can choose a cost effective heat supply with renewable resources.

Als Spezialistin für Energie-Contracting ist die e-con AG für die Wärmeversorgung und den wirtschaftlichen Betrieb eines Neubauprojekts in Mindelheim (D) verantwortlich.

Die Überbauung besteht aus zwei Mehrfamilienhäusern mit je neun Wohneinheiten, acht Einfamilienhäusern und drei Reihenhäusern. Für jede Wohneinheit wird die Wärme aus dem Fernwärmenetz in einer Übergabestation abgegeben. Der in der Übergabestation integrierte Wärmemengen-Zähler erfasst die verbrauchte Wärme für die Abrechnung. Doch ganz so einfach ist das gewählte Verfahren nicht: «Die Auswertung der Wärmemengen-Zähler über die Nahwärmezentrale gestaltete sich schwierig », so Darko Zanic, Projektleiter MSR-Technik der Firma e-con AG. «Wir konnten die Wärmemengen-Zähler nicht über Kabel mit der Nahwärmezentrale verbinden. Funk statt Kabel stand somit von Beginn an fest.»

Greater coverage with merkur Funksysteme AG

But how can proper operation of a total area of about 9‘000m2, equivalent to approximately two football fields, be ensured? "The merkur radio system is the ideal solution," says Darko Zanic. Despite difficult conditions, such as long distances between the measurement points of the buildings and the local district heating central, or obstacles for the transfer of heat energy data (for example, an intermediate building or a wall made of concrete).

The e-con AG required all heat energy data for metering and billing in exactly one central location. Thus, merkur Funksysteme AG installed an M-bus gateway for data transmission in each building. This had to be installed in each case in the basement, analogous to the heat quantity meters, the radio central and most radio antennas. For optical reasons no visible radio antennas were allowed at the surface. Despite the long range, merkur Funksysteme AG deployed only three repeaters.

«And the data transmission via radio works just fine," confirmed Darko Zanic.

Radio transmission is very reliable

The merkur radio system for remote reading of heat quantity meters has convinced Darko Zanic in many respects: "The solution is very reliable considering its long-life components. And thanks to the wireless technology, it can be quickly and easily installed - even retrospectively in existing properties."

Die Verbrauchsdaten überträgt das merkur Funksystem bidirektional und verschlüsselt. Somit führt die funkfähige Messtechnik zu einer hohen Abrechnungsqualität und -sicherheit.

Read heat consumption by radio and initiate billing

Radio for transmission of measurement data will play a crucial role in the future. The advantages are clear:

Each user is only billed for what they actually use. And e-con AG eliminates the monthly reading service of thermal energy on site. This saves time and money. The wireless installation makes the radio system especially convenient and interesting. It’s a win-win situation for both parties. Darko Zanic is also very happy with the choice of merkur Funksysteme AG: “Finally a radio system that works and a company that provides great support.”

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