BTES for tomorrows district heating systems (Borrhålslager för morgondagens fjärrvärme)

Transcription

1 BTES for tomorrows district heating systems (Borrhålslager för morgondagens fjärrvärme) Joint seminar btw the projects Termiska Energilager and RockStore, Stockholm, KTH, 20 September 2019 Fredrik Martinsson, Energiforsk, Swedish Energy Research Centre

2 What do we do? R&D initiation Early feasibility studies Program development R&D coordination Research program - often in collaboration with authorities Swedish industry in international projects Specialist services and international cooperation Qualified investigative and analytical services Arrangement of conferences and seminars Contract education Graduate Schools Representatives of international agencies

3 Why focus on thermal storage integrated in district heating systems? Mismatch between the variable renewable production and the variable demand will become an increasing cost for the energy system Flexibility is needed. The future is electrified but the coupling electricity and heating & cooling sectors is key to achieve electrification Thermal energy storage, such as BTES, can potentially increase efficiency, avoid future investments, handle bottlenecks, free valuable space in cities, district heating & cooling systems.

4 Flexibility, including thermal storage, can reduce future peak power capacity with 50 % in the Nordics A transition with and without flexibility è Less dispatchable & expensive capacity and more variable wind can cost effectively be integrated 16 Nordic countries (2050) Nordic countries (2050) GW 8 6 GW Base 2050 Flex 10 0 Base 2050 Flex Natural gas Natural gas with CCS Source: International Energy Agency / Nordic Energy Research (2016), Nordic Energy Technology Perspectives 2016 Wind

5 Seasonal storage a game changer for flexibility in both district heating and electricity systems? but not cost efficient today El price CHP heat Heat pump Heat from electric cooling Electric boilers Source: Diagram from: Roman Geyer, Ralf Roman Schmidt, AIT: Infrastructualchallenges in District Heating and Solar Solar District Heating: Joined Workshop IEA DHC Annez TS2 IEA SHC Task 55, 10th opf April Graz

6 Novel concepts for integration of thermal storage in district heating systems 0) Store steam A) Centralized B) Bottlenecks/ flaskhalsen C) Near buildings D) Within the building -customer/end user > 225 C ca C ca 75 C C C CHP Heat only boilers Waste heat Flue gas condenser Large scale heat pumps Source: Oskar Räftegård, RISE, work in progress from the project Techno-economical comparison of TS-technologies that can be used in DHC

7 What is needed to realize the thermal storage potential? Technical barriers, a few examples: The investment cost and performance of seasonal storage need to improve Very few real world examples high risk investment Not adopted to todays operating temperatures levels Additional peak capacity may be needed

8 Thermal energy storage R&D-program Overall aim: Decrease the risk in investment in new thermal storage technologies Greater knowledge of how, where and when thermal storage can be designed and used, and what benefits they can provide. Duration: April 2018 December 2020 Budget: 1.3 M (0.78 M funded by Swedish Energy Agency) Supported by 11 DHC-utilities, 5 technical consultant firms. Seven different R&D-projects initiated so far Fredrik Martinsson fredrik.martinsson@energiforsk.se

9 Thermal storage: 3 R&D areas 6 projects R&D areas Technologies and system design Project title Techno-economical comparison of TStechnologies that can be used in DHC The value of seasonal storage in district heating systems Distributed cooling storages in district cooling networks Geoenergy CHP interaction with borehole-storage - model developments Pressurised borehole storage for high temperatures Pilot projects Hybrid solution for borehole-storage < 100 C Thermochemical energy storage with multifunction, EnerStore LowTemp Organisation-Project leader RISE - Jenny Holgersson Profu Håkan Sköldberg KTH - Viktoria Martin KTH - José Acuna Bengt Dahlgren - José Acuna LKAB Wassara - Stefan Swartling SaltX Technology/Alfa Laval Christofér Rehn Budget, More information can be found here: Fredrik Martinsson fredrik.martinsson@energiforsk.se

10 Agenda for today before lunch 09:00 Welcome words and Introduction to research programs Fredrik Martinsson, program manger Thermal energy storage, Energiforsk Kirsti Midtömme, project leader RockStore, CMR NORCE Block 1. Design tools and simulations 09:40 Project 1 (Sweden): Development of a tool for design and operation Max Hesselbrandt, Willem Mazzotti, Mohammad Abuasbeh, José Acuna, KTH 10:00 Project 2 (Norway): Simulation of High Temperature Borehole Thermal Energy Storage Hanne Kauko & Karoline Kvalsvik, SINTEF 10:20 Coffee Block 2. Pilot projects 10:40 Pressurized boreholes for high temperature bore fields Tony Jernström and José Acuña, Bengt Dahlgren 11:00 Deep boreholes Thor Erik Musæus, Rock Energy 11:20 New Hybrid design of HT-BTES Stefan Swartling, LKAB Wassara 11:40 HT-BTES project in Helsinborg, Southern Sweden Claes Regander, Sweco and Mutaz Alkiswani, Öresundskraft 12:00 Lunch with short introduction to the Technical Tours

11 Agenda - after lunch 13:00 Internal workshop Termiska Energilager and Rockstore (Only for active project participants) Fredrik Martinsson in room M235 13:00 Tour 1: Aquifer Thermal Energy Storage. Bus departs outside Brinellvägen 68 at 12:45. Returns to KTH at about 14:45 14:45 Tour 2: Borehole Thermal Energy Storage. Bus departs outside Brinellvägen 68 at 15:00 and returns to KTH at 16:45 14:45 Tour 3: KTH Live-in-lab (The tour starts with a short walk departing Brinellvägen 68 at 15:00) 17:30 Dinner: The buss departs from Brinellvägen 68 at 17:30. Comes back from the Wenngarn Castle at 23:30 and arrives at KTHs subway station at about midnight Tomorr ow Program DAY 4: Drillers day. EXPO and Seminars