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Presentatie 4TH GENERATION THERMAL NETWORKS AND THERMAL CASCADING

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Paul Booij

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Presentatie 4TH GENERATION THERMAL NETWORKS AND THERMAL CASCADING

  1. 1. 4TH GENERATION THERMAL NETWORKS AND THERMAL CASCADING Paul Booij
  2. 2. OUTLINE Part 1 The (technological) future of district heating networks How to design a future district heating network Part 2 Low temperature district heating Cascading 2 | 4th Generation thermal networks and thermal cascading 12 February 2016
  3. 3. 12 February 2016 Source: H. Lund, S. Werner, R. Wiltshire, S. Svendsen, J. E. Thorsen, F. Hvelplund and B. Vad Mathiesen, in Energy, vol. 68, 2014. “4th Generation District Heating (4GDH), Integrating smart thermal grids into future sustainable energy systems” 4th Generation DHCN Efficient distribution at low temperatures Coordination of multiple, decentralized, (uncontrollable) sources Larger role for thermal (seasonal) storage Integration with other energy infrastructures (electricity, cooling) Smart!
  4. 4. Operate Forecast/ feasibility Conventional DHCN development (static) From big picture to operational details based on peak load Plan Design Control algorithms Forecasting/ feasibility tools Planning tools Design tools Conventional DHCN is expensive CAPEX/OPEX Dimensioning for worst case peak loads (with additional margins) Design for single source networks with static, high temperatures Topologies based on traditional experience, rules of thumb and tools The key of 4th generation DHCN: Smart controllers
  5. 5. Smart control with cascading benefits: game changer System-wide optimization (smart control): coordination of sources, storage and consumers Example: peak shaving by demand management in a new district with modern houses 33% peak shaving
  6. 6. Plan Design Operate Control algorithms Forecast/ feasibility Forecasting/ feasibility tools Conventional DHCN development (static) From big picture to operational details based on peak load Planning tools Design tools 4th Generation DHCN development (dynamic) Smart thermal operation influences forecasting, planning and design Conventional DHCN is expensive CAPEX/OPEX Dimensioning for worst case peak loads (with additional margins) Design for single source networks with static, high temperatures Topologies based on traditional experience, rules of thumb and tools Smart control enables system-wide optimization, which is leveraged into efficient design Holistic approach over all network time scales, from minutes (operation) to decades (investment) Lean, dynamic networks with lower CAPEX and OPEX Peak shaving
  7. 7. Plan Design Operate Control algorithms Forecast/ feasibility Forecasting/ feasibility tools Conventional DHCN development (static) From big picture to operational details based on peak load Planning tools Design tools 4th Generation DHCN development (dynamic) Smart thermal operation influences forecasting, planning and design Conventional DHCN is expensive CAPEX/OPEX Dimensioning for worst case peak loads (with additional margins) Design for single source networks with static, high temperatures Topologies based on traditional experience, rules of thumb and tools Smart control enables system-wide optimization, which is leveraged into efficient design Holistic approach over all network time scales, from minutes (operation) to decades (investment) Lean, dynamic networks with lower CAPEX and OPEX Local balancing
  8. 8. Controlled Hybrid Energy Systems Simulator A simulator for hybrid energy systems including their operational control algorithms. Develop, test and assess new system concepts with quantified costs, sustainability and reliability CHESS
  9. 9. LOW TEMPERATURE DISTRICT HEATING Renovated/new buildings: - Lower heating demand at lower temperatures - Higher cooling demand at higher temperatures From a network point of view Advantages Lower transport losses Use of return water as supply (cascading) Low return temperature back to source (greatly increases efficiency of geothermal sources) Disadvantages Trends Higher pumping costs Decreasing electricity prices? Larger pipe diameters Flexible piping low temperatures at high flow rates 12 February 201611 | 4th Generation thermal networks and thermal cascading
  10. 10. LOW TEMPERATURE DISTRICT HEATING 12 February 201612 | 4th Generation thermal networks and thermal cascading From a system point of view Advantages Trends Waste heat sources Green companies/industries/data centers Future scarcity of high temperature waste heat Efficient heat pumps Innovation and competition Power2Heat Increase of wind/solar power Efficient storage Shallow geothermal storage/heating Synergy with increase in cooling demand/networks Building as a buffer Heat prosumers Independent civilians Solar collectors, thermo-chemical storage Disadvantage  Challenge High temperature consumers in a low temperature system
  11. 11. CONCLUSION New technology will usher in a new (4th) generation of district heating/cooling systems, which is More sustainable More competitive A crucial part of the overall energy system Development of such systems requires a new paradigm, with more emphasis on Design for operation, instead of operation based on design Small scale clusters of producers/consumers/prosumers (local initiatives) Transition to 4th generation district heating starts with(in) low temperature clusters! 12 February 201613 | 4th Generation thermal networks and thermal cascading
  12. 12. WORKSHOP – 2 CASES Glastuinbouw Aalsmeer Aansluiten van 600 ha glastuinbouw op het warmtenet Lage temperatuur ca. 60 °C 12 February 201614 | 4th Generation thermal networks and thermal cascading Nieuwbouw IJburg Aansluiten van 9400 nieuwbouw woningen op het warmtenet Ook lage temperatuur
  13. 13. TE BEANTWOORDEN VRAGEN Technisch: Welke temperatuur? Wat is de totale warmtevraag? Hoe aan te sluiten op het net? Mogelijkheid tot buffering? 12 February 201615 | 4th Generation thermal networks and thermal cascading Overig: Belangrijke stakeholders? Belangrijkste kostenposten? Mogelijke bezwaren? Open vragen?
  14. 14. CONTACT 12 February 2016 Willem van den Bosch willem.vandenbosch@tno.nl +31 6537 823 02 Paul Booij paul.booij@tno.nl +31 6150 08276

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