Foto: SOL4 Büro- und Seminarzentrum Eichkogel

OptiMAS Optimization of building energy efficiency through model-based energy flow analysis with non-invasive sensors

Using a model-based energy flow analysis supported by non-invasive sensor technologies OptiMAS investigates how to monitor, analyze and optimize existing buildings independent of the installed HVAC systems and automation components. With the OptiMAS approach the optimization potential of individual buildings up to entire areas can be detected, located and tapped by adjustment of system parameters to ensure highest energy and resource efficiency.

Short Description

Starting point / motivation

Technical building facilities are often operating in unnoticed suboptimal conditions for years, causing substantial operating costs and resources. Mostly the optimization potentials remain largely unnoticed, except in case of a total failure of systems (e.g. a room is not heated at all).

For energy services, e.g. in the form of performance contracting, the quantification of measures to enhance efficiency as well as the identification of optimization potentials are indispensable. The operation of facilities can be optimized through monitoring relevant measurement data (flow temperatures, heat quantity, operating current, etc.) resulting in a decrease of the primary energy demand.

Contents and goals

OptiMAS investigates a model based energy flow analysis under consideration of the newest developments in the sensors market. The aim is to monitor existing facilities, independently from the used HVAC-systems and their control components and to analyse data to derive parameters for optimization.

The analysis of the energy flow distribution in hydraulic networks of facilities and complexes is a key indicator for multiple facility technological faults. The OptiMAS approach has the advantage that no requirements towards the HVAC-facility have to be applied and changes of the hydraulic system and subsequent legal aspects, such as warranty claims or liabilities for modifications, do not occur.


The cost-effective and detailed spatial and temporal resolved energy flow measurement in hydraulic networks constitutes a substantial innovation of OptiMAS. This is reached by the use of a minimal quantity of non-invasive sensors, a model based approach for deriving the complete energy flow and semi-automated analysis procedures for localizing optimization potentials.

Expected results

In sensor technology fundamental research with regard to characterization of low-cost, clip-on sensors in temperature and flow measurement is done. The novelty and advantage of the model based energy flow determination is to achieve a detailed and comprehensive quantification only using a minimal number of measurement points.

In addition the thermal active masses of buildings can be detected and analyzed, which are intended in future applications of facilities as storage of volatile photovoltaic or wind energy. With the OptiMAS approach the optimization potential from single facilities to whole areas and city districts can be assessed, localized and realized through adaption of system parameters.

In this way highest possible energy and resource efficiency is assured. OptiMAS can be used for a modular evaluation of the energy efficiency and for optimizing of the total energy consumption up to decreasing the life cycle costs.

(Source: Forschung Burgenland GmbH)

Project Partners

Project management

Forschung Burgenland GmbH

Project or cooperation partners

  • Donau Universität Krems/Zentrum für Integrierte Sensorsysteme
  • Siemens AG Österreich
  • Reder Domotic GmbH

Contact Address

DI Florian Wenig
Steinamangerstraße 21
A-7423 Pinkafeld
Tel.: +43 (5) 7705 4142

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