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REMOURBAN Site Tepebaşı


Project status



Tepebaşı is a municipality located in Eskişehir in the mid-western side of Anatolia with a population of 320 000. Yaşamköyü is a district of approximately 30 000 m2 with a built area of just under 10 000 m2. The area was built on 2007 by TOKI, the governmental organisation responsible for mass housing in Turkey. Although relatively newly built, similar to most buildings built before the Energy Efficiency Law that came into force recently, the district building stock consists of inefficiently constructed buildings in energy consumption terms. The typology of buildings in the district are characteristic of the relatively recently built but energy-inefficient and poorly insulated type of mass housing, typical of TOKI construction, and highly inconsiderate of the climate zone. In this respect the retrofit intervention in the district, within the REMOURBAN project, is thought to be highly relevant and exemplary for hundreds of thousands of residential buildings with similar characteristics, both in Eskişehir and also across Turkey.

The main selected residential development axis for the city is in the west, towards the present demo site. It was given careful consideration regarding the integration of the demo site’s mobility plans into the wider master plan. The highest population increase in Eskişehir, which is forecast to increase to around 950 000 by 2023 by the state statistical organisation, should happen in this axis. The selected demo site is in the middle of this development area and will present a smart and sustainable alternative to urban development in Eskişehir.

To achieve the expected impacts of 85 % of energy savings, 79 % reduction in CO2 emissions and direct involvement of 600 citizens , the project in Tepebaşı will follow an integrated approach, combining actions in the fields of low-energy districts, sustainable mobility, integrated infrastructure and society.

In the area of building renovation, ‘near-passive’ buildings will be targeted by the interventions at the demo site, as well as the realisation of a central district heating/cooling and hot water system, bringing significant energy saving. With regards to mobility, among the measures that will be implemented is an additional 6.2 km expansion to the cycling lanes and organising municipally owned e-bikes. All these measures are complemented by ICT technologies and strategies, including a building energy management system, bike rental operation and ‘City on Cloud’ city management system with all the energy, mobility and other data on a cloud system, which will be monitored by the municipality. The success of the actions is ensured through social and non-technical measures such as a citizen engagement strategy, a social media strategy, a stakeholder platform, a strategy for development of integrated urban plan, and common sustainable and smart evaluation procedures.

Demo Site Expected Impact

* Detailed information regarding the technical and financial performance will be available at a later stage.

The overall gross floor area of 10 570 m² has been refurbished in the Tepebaşı demo site. The annual final energy saving is 1559 MWh. The total CO2 emission savings amount to 476 tons of CO2 per year.


Buildings and energy

* Detailed information regarding the technical and financial performance will be available at a later stage.

The actions and measures being implemented in Tepebaşı within the REMOURBAN project are:

Energy efficiency in buildings

  • Retrofitting the building envelope
    • Retrofitting 10 570 m2 with 57 dwellings and 386 residents
    • Near-passive buildings will be targeted by the interventions
    • The most important component of the energy category interventions will be heating/cooling energy saving implementations on the building envelope via strong insulation in exterior walls, triple-glazed window units, pipe and attic insulation.

Energy systems integration

  • District heating and cooling
    • Renewable heating and cooling – air sourced heat pump and chiller
  • Biomass boilers
    • Cogeneration (CHP)
    • Polygeneration
    • Thermal storage
  • Electrical energy storage
    • Critical loads will be served via battery storage that will be housed in the same building as the central heating plant
  • Photovoltaics
    • Electricity distributed generation
  • An approximately 150 kWp photovoltaic system will generate around 70 % of the power needs of the demo site. The PV system consists of a 100 kWp rooftop building-integrated photovoltaic installation on the custom-made roof of the social centre, in addition to 50 kWp implemented on the car park area
  • Thermal collectors
    • Solar thermal collectors for domestic hot water (parabolic vacuum pipe)
    • 27 kWt solar collectors
  • Smart street lighting
    • All lighting within buildings and street lighting in the district will be turned to low energy LED lighting with smart applications

Mobility & Transport

  • Clean fuels and fuelling infrastructure
    • Incentives – integrated bike rental system, free parking for electric vehicles, municipality info kiosks for travel information
  • Electric, hybrid and clean vehicles
    • 30 electric bikes
    • 4 electric buses and minibuses for mass transit
    • 22 electric hybrid vehicles for the municipality fleet
  • Bicycle infrastructure
    • An additional 6.8 km of cycling lanes will be established. The bicycle lanes will be integrated into the urban transportation network via nodes and bike parks at the city rail (ESTRAM) stations. A fleet of 30 e-bikes will be rented out by the Tepebaşı municipality, and the necessary charging infrastructures will be installed in the appropriate locations.
  • Intermodality
    • Door-to-door multimodality transport – advantageous ticketing options (bikes + public transport system), public transportation smartcard, smart debit card applications

The Tepebaşı municipality will purchase 4 e-buses operating to/from the demo site and its surroundings as well as 22 hybrid cars that will exploit the charging infrastructures to be established.


  • Building energy management system
    • Advanced building energy management system – energy monitoring system (automatic and occupancy control, CO2 sensors, comfort controllers)
  • Neighbourhood energy management system
    • Energy monitoring and control system
  • Mobile applications for citizens
    • Advanced monitoring and energy performance visualisation ICT platform
    • Intelligent transport systems – smart phone app mobility, info interface to bike system
  • Strategic urban planning
    • Re-skilling centre in Tepebaşı, which will also act as a smart city and community demonstration site, with the smart and renewable energy urban management system in place
  • Urban data platform
    • City information platform – smart city monitoring portal
    • Shared infrastructure - energy data monitoring infrastructure access via the smart city monitoring portal

Energy Carriers

  • Heat/district heat
  • Solar thermal energy
  • Waste heat

Energy Systems Types

  • Infrastructure & System Integration
  • DHC extension

Mobility Type of Intervention

  • Infrastructure

Thematic Field

  • Energy System(s) Integration
  • Information and Communication Technologies
  • Mobility and Transport
  • Refurbished Building(s)

Heat Plant

View more visualisations of REMOURBAN Site Tepebaşı


Murat Aksu
City of Eskisehir