Slide 1 Update (Geo-) Thermal Smart Grid Mijnwater Heerlen (T6a-1) Strasbourg, 22th September 2016 MSc. René Verhoeven (r.verhoeven@mijnwater.com) Cluster and Conceptual Design Manager Mijnwater B.V. Heerlen, the Netherlands Thank you chairman for the nice introduction. (And indeed) As winner of the European Geothermal Innovation Award 2015, we are very honoured to have the opportunity to give you an update of the Minewater developments in Heerlen.
Slide 2 Update (Geo-) Thermal Smart Grid Mijnwater Heerlen (T6a-1) Status quo, New developments, Operation, Performance and Lessons learned September 2016 I will discuss the current status, new developments and some cases concerning operation, performance and lessons learned.
Slide 3 Mijnwater 2.0 Clusters of buildings Hydraulic cloud grid Instant heat/cold exchange CLUSTER D Minewater as storage Componenta-Otterveurdt HH1 Fully demand driven Bidirectional wells (2017) Multiple sources HLN1 All electric (100% HP) HLN3 HH2 CLUSTER A Arcus-APG CLUSTER C Weller HHC CLUSTER B CBS-Maankwartier CO 2 -reduction HLN2 65 % September 2016 First, a brief summary of the innovative Minewater 2.0 thermal smart grid as presented the first time at the EGC 2013 in Pisa and shown in this geographical overview: • A low temperature cloud structured exchange grid with: • Decentralize all-electric energystations in the connected buildings and • Instant heat and cold exchange between buildings through local cluster grids and between these cluster grids through the existing mine water grid; • The minewater is used as a storage instead of a source to prevent depletion and improve capacity; • The system is: • Fully automatic and demand driven; • With bidirectional minewater wells, to be ready in 2017; • And it is suited for the application of multiple sources. The system is in operation now for more than 3 years. It works very well as designed, some parts even better than expected, others initially failed and needed additional tuning, improvement or mitigation.
Slide 4 Mijnwater 2.0 Current status Ltd since November 2013 Mijnwater owner/operator CLUSTER D grid & energy stations Componenta-Otterveurdt HH1 Part of PALET (Carbon neutral 2040) 175.000 m 2 connected 30 M € invested HLN1 Heat 4,4 MW; Cold 4,2 MW HLN3 HH2 CLUSTER A Arcus-APG CLUSTER C Weller HHC CLUSTER B CBS-Maankwartier HLN2 September 2016 Some facts about the current status: • Minewater became a private company in November 2013, fully owned by the municipality of Heerlen. • Minewater has made a shift form just being owner and operator of the grid to additional ownership and operation of the decentralized energy stations; • Minewater became part of the Parkstad Limburg Energy Transition, targeting to become carbon neutral in 2040, Minewater is the core initiative to achieve this. • Today 175.000 m2 of buildings are connected to the grid, aiming for 500.000 m2 in 2017. • 30 Million Euros are invested. • The installed heating and cooling capacity is 4 to 4.5 MW
Slide 5 Mijnwater 2.0 New connections MAB Rabobank 4.500 m2 3.200 m2 All electric All electric CO 2 : - 65% CO 2 : - 65% Maankwartier Acquisition HHC 50.000 m2 Transition to all electric All electric 30.000 m2 CO 2 : - 65% CO 2 : - 65% September 2016 Here impression of the some new built connections. • All energy stations owned and operated by Mijnwater except the Rabobank; • Most remarkable is Moon quarter with 50.000 m2. A thermal buffer of 70 m3 is installed for peak shaving and passive reuse; Due to this, the connection to the grid could be reduced to 50% of peak demand; • (Mijnwater also acquired the existing energy station of the Heerlerheide Center Complex from the Weller housing company including all energy services and transformed the energy station into all-electric.)
Slide 6 Mijnwater 2.0 Cluster D – Heat recovery - Industry September 2016 Here a view of the Cluster D with a high waste heat recovery potential with high and low temperature waste heat that can be used in cascade between the industries and by the nearby low temperature end-users like the swimming pool and existing dwelling areas.
Slide 7 Mijnwater 2.0 Smart energy stations: low-exergy & hybrid 25 ˚C Energy exchange between building and cluster grid 65 ˚C 40 ˚C Energy station Booster heat pump for all-electric (HP) domestic hot water September 2016 Minewater developed a blueprint for the energy stations designed in accordance with the low-exergy principle. The heat from the grid with a temperature of about 25 ˚ C is lifted by small heat pump in cascade up to the required heating temperature of the end-users, 40 ˚ C max for new buildings, 50 ˚ C max for renovated buildings. For domestic hot water the temperature is lifted up additionally to 65 ˚ C by individual booster heat pumps at the end-users. Needless circulation of hot water with corresponding high heat losses are prevented. These energy stations are also hybrid, able to adjust to different temperature in the cluster grid that can occur due to the application of multiple sources. In this way the available energy can be used in most passive way.
Slide 8 Mijnwater 2.0 Local area grids for new and existing renovated dwellings Local area grid (4-pipe) Energy Transfer Station with booster heat pump for DHW Cluster grid (2-pipe) September 2016 A new building block in our system are local area grids for supply of heat and cold to new and/or renovated dwellings, provided by an energy station in an underground basement, connected to the cluster grid. Existing dwellings will be equiped with an energy transfer station in a box out-side the dwelling with an individual booster heat pump and buffer for domestic hot water .
Slide 9 Mijnwater 3.0 Self-learning Thermal Operational Resource Management (STORM – Horizon 2020) Peak shaving INTELLIGENT Valley filling TOP LEVEL Self-learning Adaptive CONTROL FRAMEWORK week/month PV HP S BioCHP Market Interaction S hour/day S Cell/cluster season balancing Heat Cold PV HP CO 2 -reduction 80-100 % September 2016 The next innovation stage called Minewater 3.0 focusses on mastering demand and supply with intelligent control and smart storage. Within the Horizon 2020 project called STORM an intelligent top level control frame work is in development. A self-learning, predictive and adaptive intelligent controller for optimal operation of the total energy infrastructure at each level (buildings, clusters, minewater backbone) with multiple control strategies like cell/cluster balancing; peak shaving and interaction with the electricity market. Most effective when combined with advanced storage, like seasonal long-term storage in the minewater reservoir, mid- term storage within the clusters and short-term storage in the buildings.
Slide 10 Mijnwater 3.0 Smart storage: Energy carrousel Multifunctional: HT-Source (Solar, Peak shaving biomass, waste heat or surplus green Passive reuse electricty E grid) Seasonal/HT storage Autonomous operation Temperature buffer ˚C Cluster grid PV connection Heatpump installation September 2016 For the cluster level a new smart storage concept called the Energy carrousel is developed, based on the Ecovat application. A big multi-functional subsurface stratified thermal buffer for peak shaving, passive reuse and seasonal or HT storage of solar thermal, biomass, waste-heat and surplus of green electricity. With these buffers it is possible to reduce the connection to the grid with a factor 3 to 5. Also autonomous operation of the connection and/or the compleet cluster grid is possible by using the buffer as a temporary source.
Slide 11 Mijnwater Operation Experiences and lessons learned Energy exchange by pumps in series (yes it can); Behaviour custer grids as buffers (balancing/back-up); Bio-fouling cluster grids (pH control; bio-shots); Depletion cold production well; Leakage incident cold production well; Performance production wells. September 2016 Let ’ s discuss now some of our experiences and lessons learned with operation. • An energy exchange grid like Mijnwater means putting pumps in series. Operation proofs that this is possible if designed and tuned well; • We discovered that cluster grids behave like buffers and can be used for short-term balancing and back-up; • We also experienced that bio-fouling can occur in cluster grids, which is typical for closed low temperature grids. It can easily be prevented by right pH control on 9 – 10 and frequent bio shots; The next 3 items: depletion of the cold production well, the leakage incident at the cold production well and the performance of the production wells will be discussed more in detail.
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