Improved energy efficiency with surface heating and cooling

1
Improved energy efficiency with surface heating
and cooling

• Lars Nielsen
• Ilari Aho
• Uponor Group
• REHVA Supporters Seminar
• Amsterdam, May 14, 2009

2
Presentation outline

• Uponor in brief
• The EPBD and its relation to Uponor solutions
• The Exergy concept and LowEx solutions
• Radiant heating cooling solutions
• Case Study ZUB
• Summary and Conclusions

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Uponor key facts Company

• Leading provider of plumbing indoor climate
  systems in Europe and North America
• Market leader in infrastructure pipe systems in
  the Nordic countries
• Net sales for 2008 EUR 950 million
• Operations in 30 countries with 11 factories in 6
  countries
• Personnel ca 3,800 persons
• Listed in NASDAQ OMX Nordic in Helsinki

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Response measures to the EPBD recast

• EPBD Main Pillars
• Energy performance requirements for new buildings
• Energy performance requirements for existing
  buildings that undergo major renovation
• Energy performance certificates
• Inspection of heating and air-conditioning
  systems
• Preference to
• Decentralised energy supply systems based on
  renewable energy
• Cogeneration
• District or block heating or cooling
• Heat pumps

• Low Exergy System Design
• Radiant Heating Cooling Solutions
• High energy efficiency improvement potential
  (5-50)
• Low temp. heating high temp. cooling optimal
  for heat pumps, district heating etc.
• Optimal utilisation of free and renewable energy
  sources
• Superior indoor comfort!

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The Exergy Concept

• Exergy is the ability of an energy flow to do
  work
• Exergy combines the quality and quantity of
  energy
• Exergy analysis is established practice in power
  plant optimisation, industrial ecology, etc
• First applications to the building sector in the
  1990s
• Exergy in practice
• Match the quality of supplied energy to the
  quality needs of the demand side
• Low temperature heating and high temperature
  cooling (Rehva guidebook no. 7)
• Optimal utilisation of low quality energy in
  district heating and district cooling systems

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Integrated water based systems ensure Exergy
performance
High-performance buildingsHydronic Heating
Cooling system
LowEx Supply structuresDistrict Heating,
District Cooling
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Uponor Indoor Climate SolutionsInvisible Comfort

• Under floor heating and cooling systems
• Thermally ActiveBuilding Systems(TABS)
• Cooling panels andsurface cooling elements
• Radiant heating and cooling controls
• Pre-insulated piping systems
• Ground energy collector systems
• Ventilation ducting

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Radiant cooling solutions

• Cooling panels
• Both new build and refurbishment
• Office, commercial and publicbuildings

• Floor cooling
• Office, commercial, public and residential
  buildings
• Mainly for new build

• Capillary mats
• Office, commercial, public and residential
  buildings
• Both new build and refurbishment

• Thermally Active Building Systems
• Office, commercial and public buildings
• For new build only

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Thermally Activated Building Structuresstores
and releases effect when needed
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Low temperature heating yields optimal
performance of heat pump solutions

• The EPBD recast requires heat pumps to be
  considered for new buildings
• Radiant heating and cooling systems ensures
  optimal heat pump performance with supply
  temperatures close to ambient
• The Seasonal Performance Factor depends on the
  COP and the entire heating system
• A rule of thumb for heating is that 1C higher
  supply flow temperature causes up to 2.5 higher
  energy consumption per yea

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Centre for Sustainable Building (ZUB), Kassel,
Germany

• The construction of the ZUB office, research and
  exhibition building is an example of what today's
  state of the art of technology for low energy
  demand and sustainable building can look like.
• Planned as an example of a low energy building,
  the new office of about 1300 m² is attached to an
  existing preserved building and consists of three
  different main partsone for exhibitions and
  events, one for offices, and an experimental part
  for different kinds of research in innovative
  building techniques and building services.

• A special focus was given to the realisation of a
  sustainable cooling concept, using a renewable
  energy source the coolness of the ground
  underneath the building.

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The ZUB energy concept

• Minimised thermal losses during heating season
  and heat gains during cooling season
• Architectural design
• High insulation levels
• Solar gain control
• LowEx system solution
• 25-40 C supply temperature for heating
• 16-20 C supply temperature for cooling
• district heating return line utilisation and
  ground-coupled cooling

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Summary on Low Exergy systems

• LowEx concepts and integrated design provide
• indoor comfort and reliability for end-users
• energy and cost performance
• productivity more from less
• Implementation requires
• a holistic and multidisciplinary approach through
  project planning, design, construction and
  commissioning
• new approaches, skills and an open mindset from
  HVAC design
• but it doesnt require
• completely new technologies
• high upfront investments

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Conclusions

• Radiant heating cooling solutions provides
• good potential for improving energy performance
  in response to the EPBD
• optimal operating conditions for renewable energy
  sources
• high comfort
• A total system approach is required
• for optimal performance of the building HVAC
  system
• interconnected water-based systems is a key
  element for overall performance
• Solutions for energy renovation are required
• cost efficient Low Exergy renovation solutions
  are required for the existing building mass
• radiant system can provide part of the response
  to increased future cooling loads

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