Introduction Essent

• Essent is a Dutch based utility with a turnover of EUR 7,4 billion and appr.11.000 employees

• Essent is largest producer of green electricity and biomethane in The Netherlands

• Essent Warmte operates several district heating grids and has more than 70.000 customers

district heating Essent

• traditional district heating (heat from power stations and CHP)

• since 2000 several projects with heat pumps and seasonal heat storage

• in 2007 three projects with biogas CHP in new urban areas with low-energy houses (heat demand 20-30 GJ is 5500-9000 kWh per year)– Techum/Jabikswoude in Leeuwarden– Zuidbroek in Apeldoorn– Polderwijk in Zeewolde

highest reduction of CO2 with biogas CHP

Leeuwarden

ZeewoldeApeldoorn

Zuidlanden - Leeuwarden

• district heating for 750 new low-energy houses, school and care centre

• extension with 300 houses expected• dairy cattle farm "Nij Bosma Zathe" of

Wageningen University produces biogas• 5,5 km biogas pipeline for transport of biogas

to 2 x 340 kW CHP located between the dwellings Techum and Jabikswoude

farm

CHP

biogas pipeline

district heating

district heating

Zuidbroek - Apeldoorn• district heating for 2500 low-energy houses, schools,

shops and care centre• production of sewage gas and biogas from

slaughterhouse waste at sewage treatment plant of Waterschap Veluwe

• 2,5 km pre-insulated pipe for transport of green heat to Zuidbroek residential area

• community of Apeldoorn plans to be energy neutral in 2020; district heating Zuidbroek in project Sorcer of EU Concerto+programme

• biofuel peak boiler, hot fill connection for dishwasher and subsidy for individual pv with support of Sorcer

Polderwijk - Zeewolde

• district heating for 3000 new houses• dairy cattle farm produces biogas• 6 km biogas pipe line for transport of biogas

to 1 MW CHP in Polderwijk boiler house• 50% reduction of CO2 for heating and

electricity consumption compared to standard for new houses

Groene warmte uit biogas van melkveehouderij

3000 houses

CHP

biogas

Polderwijk Zeewolde

Why biogas for district heating?

• biogas can easily be transported to residential areas

• heat of biogas engine fulfills demand for legionella safe heat supply to houses (temperate 70 degrees for domestic hot-water)

• green heat is effective tool in development of climate neutral cities

Essent: more biogas in the city

• Essent Warmte is offering district heating based on biogas for several new residential areas to communities in The Netherlands

• Essent Warmte is investigating supply of biogas to CHP in existing district heating projects

• Essent Warmte actively promotes maximal utilisation of biofuels and is member of Dutch association for biochp www.biowkk.nl

design of energy station Zuidlanden Leeuwarden