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E. van der Roest

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7 records found

Utilisation of waste heat from PEM electrolysers

Unlocking local optimisation

Journal article - E. van der Roest, E. van der Roest, Ron Bol, T.W. Fens, A.J.M. van Wijk, A.J.M. van Wijk

Recovery of heat from electrolysers is potentially interesting to increase the total system efficiency, reduce CO2 emissions, and increase the economic feasibility of both hydrogen and heat production. This study examines different designs for the utilisation of (waste) heat from ...

Introducing Power-to-H3

Combining renewable electricity with heat, water and hydrogen production and storage in a neighbourhood

Journal article - E. van der Roest, E. van der Roest, Laura Snip, T.W. Fens, A.J.M. van Wijk, A.J.M. van Wijk

In the transition from fossil to renewable energy, the energy system should become clean, while remaining reliable and affordable. Because of the intermittent nature of both renewable energy production and energy demand, an integrated system approach is required that includes ene ...

Converting Waste Toilet Paper into Electricity

A First-Stage Technoeconomic Feasibility Study

Journal article - E. van der Roest, E. van der Roest, Mijndert van der Spek, Mijndert van der Spek, Andrea Ramirez, Andrea Ramirez, Bob van der Zwaan, Bob van der Zwaan, Bob van der Zwaan, G. Rothenberg

We studied the possibility of converting waste toilet paper (WTP) into electricity. WTP is a waste stream with continuous availability and negative cost, but it is difficult to handle, as it contains fecal matter. The process we explored had two stages: WTP gasification followed ...

The Impact of System Integration on System Costs of a Neighborhood Energy and Water System

Journal article - E. van der Roest, E. van der Roest, T.W. Fens, J.M. Bloemendal, J.M. Bloemendal, S.T.W. Beernink, S.T.W. Beernink, J.P. van der Hoek, J.P. van der Hoek, A.J.M. van Wijk, A.J.M. van Wijk

The fossil-based energy system is transitioning towards a renewable energy system. One important aspect is the spatial and temporal mismatch between intermitted supply and continuous demand. To ensure a reliable and affordable energy system, we propose an integrated system approa ...

Towards Sustainable Heat Supply with Decentralized Multi-Energy Systems by Integration of Subsurface Seasonal Heat Storage

Journal article - E. van der Roest, E. van der Roest, S.T.W. Beernink, S.T.W. Beernink, Niels Hartog, Niels Hartog, J.P. van der Hoek, J.P. van der Hoek, J.M. Bloemendal, J.M. Bloemendal

In the energy transition, multi-energy systems are crucial to reduce the temporal, spatial and functional mismatch between sustainable energy supply and demand. Technologies as power-to-heat (PtH) allow flexible and effective utilisation of available surplus green electricity whe ...

Energy and Water system integration in the urban environment

Doctoral thesis - E. van der Roest

The transition from a fossil to a renewable energy system presents challenges in ensuring reliable and affordable energy supply. This dissertation addresses these challenges by proposing an integrated system approach to designing a renewable energy and water system on the neighborhood level. The concept, known as Power-to-H3, involves converting local solar and wind energy to hydrogen and heat, utilizing rainwater for various purposes, and incorporating multiple energy carriers (electricity, heat and hydrogen). A techno-economic simulation multi-energy model is developed and applied to assess to what extend the concept is clean, reliable, and affordable in delivering the neighborhood system services energy, transport and water (Chapter 2 & 3). The study explores different system integration scenarios, highlighting the benefits of combining power-to-heat, seasonal heat storage, and power-to-hydrogen methods to create a more balanced system that can be cheaper than all-electric solutions (Chapter 3). Additionally, the research proves the value of including seasonal storage in MES modelling by investigating in more detail the coupling of a multi-energy system model with a numerical hydro-thermal model for accurate modelling of high-temperature aquifer thermal energy storage systems (Chapter 4). Moreover, the recovery of waste heat from electrolysis and its potential for CO2 savings is assessed, which shows how the efficiency of electrolysis increases to 90% when waste heat is utilized (Chapter 5). Finally, an experimental study examines the integration of energy and water systems in a building, demonstrating the cooling effects of green roofs with rainwater storage on solar panels with an expected 4.4% higher PV output (Chapter 6). Overall, this dissertation provides insights into designing reliable, affordable, and clean energy and water systems at the neighborhood level, particularly in North-West European contexts.@en

Increasing solar panel output with blue-green roofs in water-circular and nature inclusive urban development

Journal article - E. van der Roest, E. van der Roest, Joris G.W.F. Voeten, D. Gijsbert Cirkel

With an increasing demand for climate resiliency, water sensitivity, nature inclusiveness and energy efficiency in dense urban environments, the call for layered and multifunctional use of rooftops is rising. Vegetated roofs combined with Photo-Voltaic (PV) installations are an e ...

Contributed

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Mitigating high PV penetration-induced low-voltage grid overvoltage while stimulating the energy transition through a generalised approach

Master thesis - D.J.G. van Hasselt, T.W. Fens, E. van der Roest

This research describes a generic step-by-step approach that can be used to depict energy transition-enhancing overvoltage mitigation strategies that fit the local context of a neighbourhood. Although high PV induced low-voltage grid overvoltage mitigation has been studied extensively, this research adds onto existing literature in three ways. It is the first generic approach to develop neighbourhood overvoltage mitigation strategies. Moreover, it considers spatial and socio-economic aspects. Lastly, it regards system integration and wider energy transition ambitions. The 6 steps of the transition-enhancing overvoltage mitigation framework (TENOMF) are described. Subsequently, the TENOMF is demonstrated on a case study in the Diamantbuurt in Amsterdam. The results of the case study show that conventional mitigation strategies are very effective in overvoltage mitigation, however, they lack in wider energy transition ambitions. In consideration of local energy transition plans, hydrogen conversion shows to be very effective financially and energetically. In combination with high electrification, home batteries prove to be effective in system integration. The final decision-making should be done with the involvement of local stakeholders. For the social acceptance of a strategy, co-ownership, local benefits and involvement in the planning process are of great importance. With the TENOMF, strategies mitigating PV induced overvoltage in the LV grid can be chosen that fit the local context of a neighbourhood. By using system integration, the TENOMF matches overvoltage mitigation strategies with energy transition ambitions. Therefore, using the TENOMF, overvoltage mitigation can be seen as an opportunity as it helps catalysing the energy transition as a whole. Largest limitations were caused by the used PtX model for the energetic assessment. It is recommended to improve PtX’s overvoltage modelling by using a higher time-granularity and by considering fundamental electrotechnical principles.