References of "Verbruggen, Aviel"
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See detailUnveiling the mystery of Combined Heat & Power (cogeneration)
Verbruggen, Aviel; Dewallef, Pierre ULg; Quoilin, Sylvain ULg et al

in Energy (2013), 61

The article unveils the mystery of cogeneration. Cogeneration is an add-on or embedded activity in thermal power plants, with as merit the use of part or whole of their point source heat exhausts. EU's ... [more ▼]

The article unveils the mystery of cogeneration. Cogeneration is an add-on or embedded activity in thermal power plants, with as merit the use of part or whole of their point source heat exhausts. EU's talk of “high-efficiency cogeneration” is an unfounded transfer of responsibility from the hosting thermal power generation plant onto CHP (Combined Heat & Power) activity. The quality of a CHP activity is univocally defined by its design power-to-heat ratio σ, a tombstone parameter derived from the design characteristics of the power plant. A thermal power plant may house more than one cogeneration activity. Identifying σ requires positioning the bliss point in the electricity–heat production possibility set of the cogeneration activity. The bliss point is where after electric output is maximized, the sum of that output and the maximum recoverable quantity of heat occurs. Once CHP's mystery of virtual bliss points is unveiled, the proper σ are found. With known σ by CHP activity, the quantity of cogenerated electricity is reliably assessed as best indicator of cogeneration performance. Our analysis is applicable on all relevant thermal power cycles that host CHP activities, and illustrated with a numerical example. Our lean method is necessary and sufficient for proper CHP regulation. [less ▲]

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See detailAvailable technical flexibility for balancing variable renewable energy sources: case study in Belgium
Quoilin, Sylvain ULg; Verbruggen, Aviel

Conference (2013)

The world is facing a historical increase in energy demand and energy consumption. Renewable energy sources are considered as a solution to both environmental issues and increasing energy demand, but ... [more ▼]

The world is facing a historical increase in energy demand and energy consumption. Renewable energy sources are considered as a solution to both environmental issues and increasing energy demand, but present high variability and low predictability. Variability and uncertainty are familiar aspects of all power systems. However, the increase of the share of renewable sources leads to new needs in terms of flexible resources. These resources can be provided by four different means: 1. Dispachable power plants (i.e with ramp up and ramp down capabilities) 2. Storage systems, mainly in the form of pumping stations. 3. Grid interconnections between countries 4. Demand side management. The present work focuses on the high voltage transmission grid, and assesses the amount of technical flexibility available to balance the fluctuations of Variable Renewable Energy (VRE) sources. The model is based on a dynamic programming unit commitment algorithm (i.e. accounting for each individual power plant on the grid) and focuses more particularly on the flexibility potential of power plants and of energy storage. The selected time resolution is one hour. Residual load curves are established on the basis of actual consumption for the year 2012 and on different scenarios of solar and wind penetration. The method is applied to the case of Belgium, based on actual disaggregated power consumption curves throughout the year, and on the current power generation park. Due to the difficulty to assess the flexible resource available through interconnections, the Belgian grid is considered isolated. It should also be noted that this work does not address the voltage stability issue: it focuses on balancing issues only (i.e. time constants varying between minutes and days). Simulation results show the VRE penetration potential is higher than usually considered. Bottlenecks therefore seems to be related to improper or inefficient market mechanisms, unable to take full profit of the technical flexible resource available. [less ▲]

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See detailVariable Renewable Energy integration and the balancing challenge: Flexibility assessment in Belgium
Quoilin, Sylvain ULg; Dewallef, Pierre ULg; Verbruggen, Aviel

Poster (2012, November)

The world is facing a historical increase in energy demand and energy consumption. Variable Renewable Energy (VRE) sources are considered as a solution to both environmental issues and energy demand, even ... [more ▼]

The world is facing a historical increase in energy demand and energy consumption. Variable Renewable Energy (VRE) sources are considered as a solution to both environmental issues and energy demand, even though they present high variability and low predictability. Variability and uncertainty are familiar aspects of all power systems. However, the increase of the share of renewable sources leads to new needs in terms of flexible resources. These resources can be provided by four different means: 1. Dispatchable power plants (i.e. with ramp up and ramp down capabilities) 2. Storage systems, mainly in the form of pumping stations. 3. Grid interconnections between countries 4. Demand side management. The present work focuses on the Belgian transmission grid. In order to assess its flexibility, both the technical flexible resource available and the flexibility requirement are evaluated in the considered area and the Present Variable Renewable Energy penetration Potential is calculated. [less ▲]

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See detailSUSTAINABLE ENERGY POLICY INTEGRATED ASSESSMENT “SEPIA” - Final Report
LAES, Eric; COUDER, Johan; VERBRUGGEN, Aviel et al

Report (2011)

The report summarizes a 3 years research program aimed at developping long term sustainable scenarios for Belgian the energy system. The research included expert participation, stakeholders assessment ... [more ▼]

The report summarizes a 3 years research program aimed at developping long term sustainable scenarios for Belgian the energy system. The research included expert participation, stakeholders assessment, quantitative modelling and fuzzy-logic analysis of the assessments. It produced three scenarios for a sustainable energy system in Belgium 2050. [less ▲]

Detailed reference viewed: 34 (5 ULg)