#18DEdays

Miha BobičDanfoss A/S

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How to keep people and planet cool? District Energy to the rescue!

Global District Energy Days Helsinki, 27 September 2018

Miha Bobic, Senior Director DEN Global Vertical

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Why ?

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The number of population-weighted cooling degree days (CDDs) in Europe increased by 49.1 % between the periods 1951–1980 and 1981–2014

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10%of the world’s CO2 emissions is produced by cooling

33xThe factor by which global cooling demand will grow by 2100

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District energy to the rescue ?

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District Cooling – benefits • District cooling is an environmentally friendly cooling solution as it comes from local,

natural resources e.g. sea water, or from chillers running on steam or electricity

• District cooling can lead to 50% reduction of cooling energy consumption through higher energy efficiency

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System optimization is key

Energy source

Distribution network

Buildings

Sustainable energy carriers

Efficient DHC distribution networks (primary side)

Efficient energy use inside the building (secondary side)

Waterborne systems are key to a successful energy transition and sector coupling Optimal system performance = optimal control and heat transfer along the entire systemSmart connection of primary and secondary side manage heat demand and supply flexibly

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Using synergies between sectors

• Supermarkets account for ~2% of electricty consumption

• Heat produced from refrigeration system (chillers) can be used to heat or cool surrounding buildings

• Can used for demand response and combined with ice storage

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District cooling solutions around the world

South Quay Plaza, London

Ocean Kingdom Zhuhai, China

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• Thane, with population of 1.8 million, selected as pilot city

• Feasibility study ongoing

• Best practise technologies:

• Thermal storage peak power reduction up to 50%

• Incorporation of renewables (e.g. solar, waste to energy, surplus heat etc.

• Socio economic benefits:

• Local jobs, space saving in chiller rooms and on rooftops, urban heat island effect, noise reduction, lower cooling costs, end-users do not have to maintain complicated cooling systems

*UN Environment / District Energy in Cities: Finding solutions to make District Energy a reality in India. A review of five city rapid assessments for district cooling, 2017.

India: District cooling pilot project

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Time series of population-weighted heating and cooling degree days averaged over Europe

The number of population-weighted cooling degree days (CDDs) increased by 49.1 % between the periods 1951–1980 and 1981–2014.

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