Future-oriented Technologies and Concepts for an Energy-efficient and Resource-saving Water Management (ERWAS)

Logo ENERWAWork packages of ENERWA

Work package A.1: Framework, data, boundary conditions in view of resources, technology, drinking water use, energy, ecology


Dr. Christian Feld, University of Duisburg-Essen, Department Aquatic Ecology, Universitätsstr. 5, 45141 Essen


Work package A.1 feeds all following work packages and mainly is responsible for the system wide data selection, collection and preparation as well as for providing information. A general framework for the analysis and assessment of potentials for the increase of energy efficiency and additional energy storage and production within the drinking water supply systems is determined.

The work package aims at identifying the data needs for the other work packages. Data and system descriptions of the model regions are made available for the work.

Main activities are:

  • Coordinated request and display of collected data and method needs as well as data availability, internal provision of data in compatible formats.

  • Creation of system descriptons for the ENERWA model regions.

Work package A.2: Framework, data, boundary conditions in view of economy, law, society


Prof. Hans J. Lietzmann, Bergische Universität Wuppertal,  Forschungsstelle Bürgerbeteiligung, Gaußstr. 20, 42119 Wuppertal


Water management scenarios for energy optimization will be developed with explicit consideration of economic and legal foundations of the energy and water industries. Moreover, processes of citizen- and expert-based dialogues are developed and tested to evaluate and enhance the acceptance and willingness of society to actively participate.

By developing different scenarios, a common ground for the energy optimization in the water supply system is established. A rapid and long-term implementation of restructuring has to be supported by the participation of social actors and civil society.

Main activities are:

  • Economic framework for different optimization goals (cost, ecology, water consumption)

  • Legal framework and possible development (public water law, law for water supply, remuneration mechanisms)

  • Social framework (existing acceptance barriers and need for discussion)

  • Citizen participation and stakeholder methods (moderated dialogues, possibilities of participation)

Work package B.1: Energy efficiency and generation - reservoirs and water bodies


Paul Wermter, Forschungsinstitut für Wasser- und  Abfallwirtschaft an der RWTH Aachen e.V., Kackertstr. 15-17, 52056 Aachen


The available energy regeneration potential will be determined at selected reservoirs. The whole storage capacity, including the flood water retention area, will be included in the study, too. Effects and changes in the water body regarding the raw water quality and ecological effects in the underflow of the water are analysed. Recommendations and a basis for decision-making will be developed, taking into account the ecological framework.

The objective is to extend the use of drinking water reservoirs through more energy-optimised operational and management schemes without degrading the ecological status of surface waters.

Main activities are:

  • Review of methods and definition of objectives for the regional case studies

  • Determination and evaluation of effects of the dynamization at the regional case studies regarding chemical, biological and ecological aspects

  • Evaluation and determination of theoretical energy potentials, calculation of economic standard Scenarios

  • Bundling of regional recommendations and derivation of ecologically, economically and legally resilient expansion potentials

Work package B.2: Energy efficiency and generation - drinking water treatment


Dr. Dieter Stetter, IWW Rheinisch-Westfälisches Institut für  Wasserforschung gGmbH, Moritzstr. 26, 45476 Mülheim an der Ruhr


Treatment plants and additional facilities in the waterworks of the project partners are systematically analyzed for their energy-saving potential. Innovative, less energy consuming procedures for treatment, dehumidification, heating or cooling are implemented at pilot scale and assessed regarding their hygienic-economic-operational use.

New options to save and recover energy in single treatment steps as well as in whole process chains are identified, evaluated and quantified.

Main activities are:

  • Literature and market research

  • Determining data, on-site-measurements in waterworks

  • Development of optimization concepts

  • Pilot plant studies 

  • Development of practical instructions, characteristic values and benchmarks

Work package B.3: Energy efficiency and generation - drinking water transport, storage, distribution


Dr. Dirk Th. König, Rechenzentrum für Versorgungsnetze Wehr GmbH,  Wiesenstr. 21, 40549 Düsseldorf


The possibilities of the implementation of energy efficient measures in the areas of transport, storage and distribution in municipal and regional drinking water supply systems are investigated. This is done with the help of already existing but mainly new procedures, such as dynamic network simulations, network planning and the development of specific algorithms.

The goal is the energetic and overall economic optimization of water distribution systems. The results enable the extrapolation of the energy-saving potential of the entire German distribution system.

Main activities are:

  • Extension of existing optimization methods

  • Identification of optimization potentials in realistic model water distribution networks

  • Transfer to real networks 

  • Extrapolation of saving potentials

Work package C.: Energy efficiency of entire systems


Dr. Hubert Lohr, SYDRO Consult GmbH, Mathildenplatz 8, 64283  Darmstadt


The previously identified potentials to save energy in the system components reservoir – treatment – distribution are analysed, respectively simulated within the context of the whole system. The results of the optimization of a subsystem within the supply chain represent the boundary conditions and input data for the subsystems in front of and behind the regarding subsystem. The results are used to derive commonly valid efficiency approaches that can be applied to other drinking water supply systems.

A management approach for the whole water system is developed by merging the results of the B-work packages.

Main activities are:

  • Identification of the interfaces and boundary conditions between the subsystems

  • Integrated analysis, simulation 

  • Determination of the overall potentials and suitability for transfer to other drinking water supply systems

Work package D.: Web service “Energy-Efficiency”


Jürgen Heinzke, IWW Rheinisch-Westfälisches Institut für Wasserforschung gGmbH, Moritzstr. 26, 45476 Mülheim an der Ruhr


This work package develops standardized energy efficiency issues and delivers the application of the developed analysis methods and implemented solution algorithms over a web based service to interested users.

Existing borders and implementation barriers of a better energy efficiency of water systems are presented to a wider public and target-orientated methods for tackling energy-efficiency issues are conveyed.

Main activities are:

  • Technical implementation

  • Identification and standardization of energy efficiency issues for web based services

  • Implementation of web based services 

  • Field test and optimization

AP E.: Synthesis and transfer of results


Paul Wermter, Forschungsinstitut für Wasser- und  Abfallwirtschaft an der RWTH Aachen e.V., Kackertstr. 15-17, 52056 Aachen


For scientific and economic distribution, the results of all work packages are brought together as a recommendation concept for energy and resource efficient water systems (manual, analysis tool, best practices). A study about the potential of energy-efficiency needs and marketing strategies investigates national and international market perspectives for the policy and economic dialogue of the actors in German water management.

The work package aims to process the ENERWA results, to ensure quality and to manufacture publication-ready products.

Main activities are:

  • Supra-regional market study

  • Business model for the web based services

  • Gathering feedback on the project results from political and technical decision makers

  • Creation and quality assurance of information products for dissemination of the results