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WarmingUP PhDs Webinar

On 7 March 2023 WarmingUP PhDs shared their research results with a broader WarmingUP audience.
The PDFs are made availabe here. Click on the link below for a PDF of the presentation. 
 

Agenda 7 March	Topic and speaker
09.00 - 09.10	Introduction
09.10 - 09.40	Model Predictive Control-based Building Thermal Inertia Exploitation Strategy in District Heating/Cooling Networks  (Ilham Naharudinsyah – TU Delft)
09.40 - 10.10	A sensitivity analysis of stress changes related to geothermal direct heat production in clastic reservoirs and potential for fault reactivation and seismicity (Arjan Marelis – Utrecht University)
10.10 - 10.40	Municipal decision-making in the heat transition and public ownership of district heating systems (Sara Herreras – Utrecht University)
10.40 - 11.00	BREAK
11.00 - 11.30	Efficient and sustainable heat storage systems: insight and lessons learned from the WarmingUP project (Stijn Beernink – KWR/TU Delft)
11.30 - 12.00	Investigating frequency domain electromagnetic methods for monitoring geothermal activities in shallow subsurface (Maria Carrizo – TU Delft)
12.00 - 12.30	Temperature effects of heat extraction from water ponds at Theme Park Efteling (Koen van Beek - TU Eindhoven)
12.30 - 12.40	Final closing

Topic description 
 

Topic	Description
Model Predictive Control-based Building Thermal Inertia Exploitation Strategy in District Heating/Cooling Networks  (Ilham Naharudinsyah – TU Delft)	The integration of renewable energy sources is the central theme of the development of future-proof district heating systems. Unlike conventional heat sources, renewable heat sources tend to have limited capacity and low generation temperatures. To support the integration of such energy sources, we require a control system to exploit the thermal flexibility in the district heating systems. In the past few years, some efforts have been put into developing a controller for exploiting thermal storage and pipeline flexibility. In this talk, we will present a new cooperative strategy based on a model predictive control strategy to exploit building thermal inertia.
A sensitivity analysis of stress changes related to geothermal direct heat production in clastic reservoirs and potential for fault reactivation and seismicity (Arjan Marelis – Utrecht University)	Accurate predictions of subsurface stress changes are required for assessing geothermal operations with respect to fault stability and the potential for induced seismicity. The effects of long-term cooling on faults near a geothermal doublet require quantification and management for safe application of geothermal energy. We present an analysis of sensitivity for fault reactivation and induced seismicity by varying key elements in the dynamic and mechanical behaviour of the reservoir. Results show predominant sensitivity for fault reactivation to the thermo-elastic parameters. The intersection area of the cold-water volume with the fault plane proves to be the main driver for fault reactivation and subsequent seismic potential.
Municipal decision-making in the heat transition and public ownership of district heating systems (Sara Herreras – Utrecht University)	Municipalities are key actors in the planning of heat decarbonisation strategies at the local level. Utrecht University has conducted two research lines. In 2021 we looked at the municipal strategies and challenges during heat planning and implementation, looking at data collection, technologies selection and the criteria used for area prioritisation in 28 municipalities. In 2022, the research examined sixteen public district heating projects and uncovered the main arguments among public and private stakeholders for and against a more public-oriented sector. The latter topic will be the focus of the presentation.
Efficient and sustainable heat storage systems: insight and lessons learned from the WarmingUP project (Stijn Beernink – KWR/TU Delft)	High-Temperature Aquifer Thermal Energy Storage (HT-ATES) systems show high potential to seasonally buffer renewable heat in combination with, for example, geothermal wells or waste heat sources. Its feasibility is strongly connected to the heat recovery efficiency of the system. In the past years, we investigated which factors influence the heat recovery efficiency of these systems and how these factors could be determined for practical cases (pilots) to minimize performance uncertainty. In this talk, we’ll share key insights and lessons learned from the HT-ATES studies that we did in the past years in the WarmingUP project.
Investigating frequency domain electromagnetic methods for monitoring geothermal activities in shallow subsurface (Maria Carrizo – TU Delft)	Electromagnetic (EM) methods have been used extensively to detect the fluid circulation, since resistivity is very sensitive to the presence of brines. Geothermal resources are possible targets for EM methods since the temperature changes produce variations in underground electrical resistivity of the fluid. In this study we analyze the feasibility of using frequency domain electromagnetic sensors for estimating electrical conductivity of the shallow subsurface and its limitations
Temperature effects of heat extraction from water ponds at Theme Park Efteling (Koen van Beek - TU Eindhoven)	At Theme Park Efteling, heat extraction from water ponds is investigated. In summer, this heat will be stored in the subsurface for later use in winter. Heat extraction from the water (aqua-thermal energy harvesting) will cause the pond to cool down (cold dump). A cold dump takes place at an injection point and will cause a non-uniform temperature distribution over the pond. Various scenarios have been modeled by means of the simulation package Delft3D Flexible Mesh to predict temperature distributions after cold dump. These predictions were compared with actual measurements. Water inflow and outflow rates from existing pipelines were also taken into consideration.