Sustainable Energy & Plants
As the world evolves, sustainable energy and ecological stewardship have become essential for environmental progress. At Clean Energy Solutions, we are dedicated to advancing these principles across diverse sectors, redefining energy generation and utilization for a greener future.
Our mission focuses on developing and implementing renewable energy solutions. From solar and wind power to smart grid technologies, we innovate to reduce fossil fuel reliance and enhance energy resilience. Utilizing photovoltaic systems and wind power, we aim for sustainability that benefits both society and the planet.
Integrating sustainable practices within the energy sector is a cornerstone of our approach. We promote energy-efficient plants and systems, emphasizing district heating powered by biomass, biogas, and biofuels. Our efforts also include thermal solar heating and cooling solutions to meet current and future energy needs with minimal environmental impact for our clients.
Your contact person

Dipl.-Ing. Felix Eckert
Renewable Energy and District Heating
Tel.: +43152169267
Mail: f.eckert@ic-ces.at
RENEWABLE ENERGY
CES is a competence center for the development of sustainable energy generation facilities for power generation, heating and cooling as well as for plant optimization for the production of biofuels..
Based on our sound expertise in plant design, we develop tailor-made solutions for the use of renewable energy sources in Austria and abroad.
Our active participation in research and development projects (R&D) enables us to consider new technologies and integrated system solutions into our planning.
Our focus in plant engineering:
- Biomass plants (heating systems, combined heat and power plants)
- Solar thermal systems for integration in district heating system
- Hydropower plants
- Biogas plants
- Biodiesel and Bioethanol facilities
Our engineering and Consulting services include:
- Due diligence
- Master plans for urban/regional energy supply
- Concept studies and site assessment
- Assessment of the availability of renewable resources
- Environmental and Social Impact Assessment (ESIA)
- Software supported plant modeling
- Program and project management for credit lines of International Financial Institutions (IFI)
- Feasibility studies incl. cost/benefit analysis
- Design, tendering, procurement and construction supervision
- Monitoring and Controlling of projects for investors and/or developers
- Management of handover processes/Commissioning
More information about…
- biomass / biogas / biofuels
- solar / geothermal / wind energy
PLANTS
The rehabilitation, optimization and new development of energy plants are pillars of our company’s expertise, covering energy generation and distribution. Our clients include energy service companies, municipalities and prestigious international financial institutions.
At the heart of our services is a commitment to asset optimization. We delve deep into existing infrastructure and operational systems, using advanced tools and methodologies to conduct thorough assessments. These assessments identify inefficiencies, bottlenecks and opportunities for improvement, paving the way for improved performance and sustainability.
From general studies and feasibility assessments to design, tendering and construction supervision, we offer a full range of services to support asset optimization initiatives. As monitoring consultants, we work closely with lenders to ensure project quality in technical, contractual and financial terms, promoting timely implementation and successful outcomes.
Integral to our approach is the integration of renewable energy sources and sustainable system solutions. We embed this consideration throughout our design and appraisal processes, using our expertise to maximize the use of clean energy and minimize environmental impact.
With a diverse portfolio of projects in different regions and contexts, we have extensive experience in optimizing energy facilities for sustainability, efficiency and resilience. Our tailored solutions enable clients to achieve their goals while contributing to a greener, more sustainable future.
DISTRICT HEATING
The rehabilitation, optimization and new development of district heating systems are a core competence of the Company and comprises energy generation and energy distribution.
Our Clients are typically energy service companies, municipalities and International Finance Institutions (IFIs) / Donors such as KfW, World Bank, EBRD or EIB.
We are covering the full service range from general studies, feasibility studies to design, tendering and construction supervision. In the position of the Monitoring Consultant we are supporting Lenders to assure project quality (technical, contractual, financial) and timely implementation.
The integration of renewable energy sources and related sustainable system solutions is a core competence of CES and can therefore be integrated into the planning and assessment process for district heating supply.
As regards energy generation the focus is on:
- Efficient co-generation based on conventional energy sources as well as biomass
- Biomass and biofuels
- Large Scale Thermal Solar System integration into the district heating schemes
- Geothermal energy utilization for municipal district heating
In terms of district heating network rehabilitation we typically base our analysis on hydraulic network assessments. We use STANET for detailed anaylsis, a software package that is used for simulation of broad utility networks (District Heating, Water, Sewage, Gas, Electricity). The assessment results in a strategic masterplan considering the existing facilities and future network extensions as well as the potential for district cooling.
Our project experience in Austria, the Balkans and Central Asia enables us to consider different district heating operation systems as well as different climatic conditions in our analyzes.
BIOMASS / BIOGAS / BIOFUEL
Following its standard, CES as the center for energy efficiency and renewable energy is dedicating itself for consulting and engineering services in order to apply latest technologies and to develop customized solutions for the utilization of renewable energy in Austria and abroad:
- Energy recovery from biomass and organic waste
- Procedural extraction of fuels and chemical raw materials
Our engineering consulting services include:
- Feasibility studies and location optimization
- Software-based modeling
- Carbon footprint calculations
- Monitoring and project management of credit lines for technology use
- Cost-benefit analysis, taking into account the funding opportunities
- Integration with zero emission concepts and sustainability master plans
THERMAL SOLAR HEATING AND COOLING
Committing itself a Competence Center for Renewable Energy Usage, CES applies latest technologies and develops tailored conceptual solutions for its clients in Austria and abroad:
Electrical Power Generation through photovoltaics (PV) or from wind power
Thermal Power Generation (heat/chill) from solar or geothermal plants
Combined Plants (CHP)
Our design and consulting services include:
- Feasibility studies and site selection
- software based modelling
- climate impact calculations
- Project monitoring and project management of RES implementation credit lines or programmes
- Integration into zero emission concepts and into sustainability schemes and master plans
- Integration of RES application within Energy efficiency investments
Design, Tendering, Supervision
PHOTOVOLTAIC AND WINDPOWER
Following its standard, CES, as the center for energy efficiency and renewable energy, is dedicating itself to consulting and engineering services to apply the latest technologies and develop customized solutions for the utilization of photovoltaic and wind power in Austria and abroad:
- Energy generation from photovoltaic systems and wind turbines
- Integration of solar and wind energy into existing grids
Our engineering consulting services include:
- Feasibility studies and location optimization
- Software-based modeling of photovoltaic and wind power systems
- Carbon footprint calculations
- Monitoring and project management of credit lines for technology use
- Cost-benefit analysis, taking into account funding opportunities
- Integration with zero-emission concepts and sustainability master plans
Our Selected Projects
Bitola, North Macedonia and Pristina, Kosovo – Pre-feasibility Study of Renewable Supply Options for District Heating in Coal Mining Regions
In the Western Balkans, the coal-based power plants TPP Bitola, in North Macedonia, and TPP Kosovo A and B in Kosovo have played a significant role in meeting the energy needs of their respective…
Kosovo – Solar4Kosovo II / Solar District Heating: Consultancy Services for the Environmental and Social Impact Assessment
Environmental Social Impact assessment (incl. ESMP, SEP, LRP, LAP and climate risk assessment) for Solar4Kosovo II/ Solar District Heating, financed by the Federal Republic of Germany Development…
Ukraine – Project Implementation support for the Action “Repair and reconstruction of damaged critical infrastructure”
The EU is providing financing to Ukrainian local communities to repair damaged and vulnerable infrastructure facilities in liberated cities in Ukraine. The Implementing Agency, the Nordic…
Kosovo – Pre-Feasibility Study for Solar Partnership – Wastewater Program (KfW Phase V/VI)
Pre-Feasibility Study for the Solar Partnership Program Wastewater Kosovo and further options on Balkan countries.n The Republic of Kosovo represented through the Ministry of Economy has been…
Hipples, Austria – Construction of 2 wind turbines: Windfarm Hipples II
As part of the development of the Hipples II wind park, CES was commissioned by Senvion, acting as the general contractor, to provide a comprehensive package of engineering and construction-related…
Ukraine, Kryvyi Rih – EBRD UPSEEF: Energy Efficiency in Public Buildings – Project Preparation and PIU Support
The Consultant has been entrusted by EBRD to support the City of Kryviy Rih in the implementation of the EnPC investment program. The support covers the project prepation phase (feasibility study…
Kosovo – Solar DH Integration – Pre-Feasibility Study (EBRD & KfW)
The pre-feasibility study shall analyse the potential for solar energy in Kosovo particularly with view to utilising solar thermal heat generation, seasonal heat storage and its integration with the…
Gjakova, Kosovo – KfW-EBRD: Pre-feasibility assessment of a solar district heating system
The overall objective of the assignment is to assess the feasibility for a complementary solar district heating system in Gjakova. The Consultant shall hence compile a project idea study which KfW,…
Austria – Innovation transfer study “Waste-To-Compost and Green Energy”
The objective of this study was to explore the market potential and technological landscape for the conversion of raw biogas into biomethane, with a specific focus on its utilization as a transport…
Kosovo – Solar DH Integration – Pre-Feasibility Study (EBRD & KfW)
The pre-feasibility study shall analyse the potential for solar energy in Kosovo particularly with view to utilising solar thermal heat generation, seasonal heat storage and its integration with the…
Austria Juice Poland – Robust WWTP Operation for 2021
Compilation of priority measures aiming at a robust operation of 3 Austria Juice WWTPs in Poland. The assignment was to equip the plants in Gora Kalwaria, Bialobrzegi and Biala Rawska with the new…
Serbia – Developing the Biomass Market
The purpose of the program was to ensure that consumers, the population and the environment benefit from a sustainable, efficient and reliable energy supply provided by economically sound operating…
Georgia – Due Diligence for Mtkvari 46,4 MW Hydro Power Plant
For the 46 MW hydro power plant Mtkvari, under construction near the city of Akhaltsikhe in the southeast Georgia, the consortium Denkstatt GmbH and CES were awarded a contract by Black Sea Trade…









