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associated OPTEC prof Member of:
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Sourbron, M., Verhelst, C., Helsen, L. (2012). Building models for Model Predictive Control of office buildings with Concrete Core Activation. Journal of Building Performance Simulation, art.nr. TBPS-2011-0043.
Verhelst, C., Logist, F., Van Impe, J., Helsen, L. (2012). Study of the optimal control problem formulation for air-to-water heat pump systems. Energy and Buildings, 45, 43-53.
Verhelst, C., Degrauwe, D., Logist, F., Van Impe, J., Helsen, L. (2012). Multi-objective optimal control of an air-to-water heat pump for residential heating. Building Simulation.
Verhelst, C., Logist, F., Van Impe, J., Helsen, L. (2012). Study of the optimal control problem formulation for modulating air-to-water heat pumps connected to a residential floor heating system. Energy and Buildings, 45, 43-53.
Verhelst, C., Helsen, L. (2012). Low-order state space models for borehole heat exchangers. HVAC & R Research.
Baetens, R., De Coninck, R., Van Roy, J., Verbruggen, B., Driesen, J., Helsen, L., Saelens, D. (2012). Assessing electrical bottlenecks at feeder level for residential net zero-energy buildings by integrated system simulation. Applied Energy.
Cuypers, F., Helsen, L. (2011). Pyrolysis of chromated copper arsenate (CCA) treated wood waste at elevated pressure: Influence of particle size, heating rate, residence time, temperature and pressure. Journal of Analytical and Applied Pyrolysis, 92 (1), 111-122.
Bosmans, A., Vanden Auweele, M., Govaerts, J., Helsen, L. (2011). Exergy analysis of the Chartherm process for energy valorisation and material recuperation of chromated copper arsenate (CCA) treated wood waste. Waste Management, 31 (4), 705-713.
Vanneste, J., Van Gerven, T., Vander Putten, E., Van der Bruggen, B., Helsen, L. (2011). Energetic valorization of wood waste: estimation of the reduction in CO2 emissions. Science of the Total Environment, 409 (19), 3595-3602.
Appels, L., Lauwers, J., Degrève, J., Helsen, L., Lievens, B., Willems, K., Van Impe, J., Dewil, R. (2011). Anaerobic digestion in global bio-energy production: potential and research challenges. Renewable & Sustainable Energy Reviews.
Mayerhofer, M., Govaerts, J., Parmentier, N., Jeanmart, H., Helsen, L. (2011). Experimental investigation of pressure drop in packed beds of irregular shaped wood particles. Powder Technology, 205 (1-3), 30-35.
Baetens, R., De Coninck, R., Helsen, L., Saelens, D. (2010). The impact of load profile on the grid-interaction of building integrated photovoltaic (BIPV) systems in low-energy dwellings. Journal of Green Building, 5 (4), 137-147.
Sourbron, M., Helsen, L. (2010). Evaluation of adaptive thermal comfort models in moderate climates and their impact on energy use in office buildings. Energy and Buildings, 43 (2-3), 423-432.
Sourbron, M., De Herdt, R., Van Reet, T., Van Passel, W., Baelmans, M., Helsen, L. (2009). Efficiently produced heat and cold is squandered by inappropriate control strategies: a case study. Energy and Buildings, 41 (10), 1091-1098.
Helsen, L. (2009). The Chartherm process, what's in the name?. Waste management, 29, 1649-1657.
Cuypers, F., De Dobbelaere, C., Van Bael, M., An, H., Helsen, L. (2009). Thermal behaviour of arsenic trioxide adsorbed on activated carbon. Journal of Hazardous Materials, 166, 1238-1243.
Luickx, P., Helsen, L., D'haeseleer, W. (2008). Influence of massive heat-pump introduction on the electricity-generation mix and the GHG effect: Comparison between Belgium, France, Germany and The Netherlands. Renewable & Sustainable Energy Reviews, 12 (8), 2140-2158.
Luickx, P., Peeters, L., Helsen, L., D'haeseleer, W. (2008). Influence of massive heat-pump introduction on the electricity-generation mix and the GHG effect, Belgian case study. International Journal of Energy Research, 32 (1), 57-67.
Peeters, L., Van der Veken, J., Hens, H., Helsen, L., D'haeseleer, W. (2008). Control of heating systems in residential buildings: Current practice. Energy and Buildings, 40 (8), 1446-1455.
Govaerts, J., Vandersickel, A., Helsen, L. (2008). Simulation of a thermochemical packed bed reactor developed to treat dried chromated copper arsenate (CCA) impregnated wood waste. High Temperature Materials and Processes, 27 (5), 319-326.
Haeseldonckx, D., Peeters, L., Helsen, L., D'haeseleer, W. (2007). The impact of thermal storage on the operational behaviour of residential CHP facilities and the overall CO2 emissions. Renewable & sustainable energy reviews, 11 (6), 1227-1243.
Helsen, L., Hardy, A., Van Bael, M., Mullens, J. (2007). Tanalith E 3494 impregnated wood: characterization and thermal behaviour. Journal of Analytical and Applied Pyrolysis, 78 (1), 133-139.
Helsen, L., Hacala, A. (2006). Formation of metal agglomerates during carbonization of chromated copper arsenate (CCA) treated wood waste: comparison between a lab-scale and an industrial plant. Journal of Hazardous Materials, 137 (3), 1438-1452.
Helsen, L. (2005). Sampling technologies and air pollution control devices for gaseous and particulate arsenic: A review. Environmental Pollution, 137 (2), 305-315.
Helsen, L., Van den Bulck, E. (2005). Review of disposal technologies for chromated copper arsenate (CCA) treated wood waste, with detailed analyses of thermochemical conversion processes. Environmental Pollution, 134 (2), 301-314.
Helsen, L., Van den Bulck, E., Van Bael, M., Vanhoyland, G., Mullens, J. (2004). Thermal behaviour of arsenic oxides (As2O5 and As2O3) and the influence of reducing agents (glucose and activated carbon). Thermochimica Acta, 414 (2), 145-153.
Helsen, L., Van den Bulck, E., Cooreman, H., Vandecasteele, C. (2003). Development of a sampling train for arsenic in pyrolysis vapours resulting from pyrolysis of arsenic containing wood waste. Journal of environmental monitoring, 5, 758-765.
Helsen, L., Van den Bulck, E., Van Bael, M., Mullens, J. (2003). Arsenic release during pyrolysis of CCA treated wood waste: current state of knowledge. Journal of Analytical and Applied Pyrolysis, 68-69, 613-633.
Helsen, L., Van den Bulck, E. (2003). Metal retention in the residue after low-temperature pyrolysis of chromated copper arsenate (CCA) treated wood. Environmental Engineering Science, 20 (6), 569-580.
Helsen, L., Van den Bulck, E. (2001). Study of a new macro-particle model for the low-temperature pyrolysis of dried wood chips. Heat and Mass Transfer, 38, 165-181.
Helsen, L., Van den Bulck, E. (2000). Kinetics of the low-temperature pyrolysis of chromated copper arsenate treated wood. Journal of Analytical and Applied Pyrolysis, 53 (1), 51-79.
Helsen, L., Van den Bulck, E. (2000). Metal behaviour during the low-temperature pyrolysis of chromated copper arsenate treated wood waste. Environmental Science & Technology, 34 (14), 2931-2938.
Helsen, L., Van den Bulck, E., Mullens, S., Mullens, J. (1999). Low-temperature pyrolysis of CCA-treated wood: thermogravimetric analysis. Journal of Analytical and Applied Pyrolysis, 52 (1), 65-86.
Helsen, L., Van den Bulck, E. (1998). The microdistribution of copper, chromium and arsenic in CCA treated wood and its pyrolysis residue using energy dispersive X-ray analysis in scanning electron microscopy. Holzforschung, 52 (6), 607-614.
Helsen, L., Van den Bulck, E., Hery, J. (1998). Total recycling of CCA treated wood waste by low-temperature pyrolysis. Waste Management, 18 (6), 571-578.
Van den Broeck, K., Helsen, L., Vandecasteele, C., Van den Bulck, E. (1997). Determination and characterisation of copper, chromium and arsenic in chromated copper arsenate (CCA) treated wood and its pyrolysis residues by inductively coupled plasma mass spectrometry. Analyst, 122 (7), 695-700.
Helsen, L., Van den Bulck, E., Van den Broeck, K., Vandecasteele, C. (1997). Low-temperature pyrolysis of CCA-treated wood waste: Chemical determination and statistical analysis of metal input and output; Mass balances. Waste management, 17 (1), 79-86.
Baetens, R., De Coninck, R., Helsen, L., Saelens, D. (2012). Geïntegreerde elektrische en thermische simulaties op wijkniveau: Gevoeligheid voor tijdsresolutie. TVVL-Magazine.
Saelens, D., Baetens, R., De Coninck, R., Van Roy, J., Verbruggen, B., Helsen, L., Driesen, J. (2011). PV- panelen: de oplossing voor nul-energiegebouwen?. Het Ingenieursblad, 80 (6), 48-53.
Baetens, R., De Coninck, R., Verbruggen, B., Driesen, J., Helsen, L., Saelens, D. (2011). PV-systemen: de oplossing voor nul-energie woningen?. TVVL-Magazine, 1-5.
Peeters, L., Helsen, L., D'haeseleer, W. (2005). Voorspelling van warmtevraag. ATIC Newsletter.
Helsen, L., Van den Bulck, E. (2001). Low-temperature pyrolysis of CCA treated wood waste. PyNe Newsletter (12), 2-3.
Helsen, L. (1995). Boekbespreking KVIV "Combustion ash/residue management: an engineering perspective" by Richard W. Goodwin. Het ingenieursblad.
Helsen, L., Van den Bulck, E. (2006). Thermal treatment technologies for treated wood. In: Townsend T., Solo-Gabriele H. (Eds.), Environmental Impacts of Treated Wood (pp. 447-465). Florida, Fla., US: Taylor & Francis Group.
D'haeseleer, W., Driesen, J., Helsen, L., Belmans, R. (2009). De energieproblematiek in vogelvlucht. In: Duurzame ontwikkeling: een multidisciplinaire visie. Leuven, Belgium: Acco.
Helsen, L., Van den Bulck, E. (2003). Low-temperature pyrolysis of CCA treated wood waste: mechanism responsible for arsenic release. In: Bridgwater A. (Eds.), Pyrolysis and gasification of biomass and waste (pp. 175-186). United Kingdom: CPL Press.
Helsen, L., Van den Bulck, E. (2001). Low-temperature pyrolysis as a possible technique for the disposal of CCA treated wood waste: metal behaviour. In: Progress in Thermochemical Biomass Conversion (pp. 1417-1432). Oxford, United Kingdom: Blackwell Science Ltd.
Helsen, L., Van den Bulck, E. (1997). Release of metals during the pyrolysis of preservative impregnated wood. In: Developments in thermochemical biomass conversion (pp. 220-228). London: A.V.Bridgwater and D.G.B. Boocoock.
Baetens, R., De Coninck, R., Helsen, L., Saelens, D. (2011). Integrated dynamic electric and thermal simulations for a residential neighborhood: Sensitivity to time resolution of boundary conditions. Proceedings of Building Simulation 2011: 12t Conference of International Building Performance Simulation Association. Building Simulation. Sydney, 14-16 November 2011 (art.nr. 1567) (pp. 1745-1752). Sydney: IBPSA/AIRAH.
Hoogmartens, J., Helsen, L. (2011). Influence of control parameters on the system performance of ground coupled heat pump systems: a simulation study. . Building simulation. Sydney, Australia, 14-16 November 2011 (art.nr. 20).
Hoogmartens, J., Helsen, L., Franck, G., Van Passel, W. (2011). Monitoring the system performance factor of domestic heat pump systems in Flanders (Belgium). . ISHVAC. Shanghai, China, 6-9 November 2011 (art.nr. 0664).
Ferkl, L., Verhelst, C., Helsen, L., Ciller, A., Komarek, J. (2011). Energy Savings Potential of a Model-Based Controller for Heating: A Feasibility Study. IEEE Multi-conference on Systems and Control. IEEE Multi-conference on Systems and Control. Denver, 28-30 September 2011 (art.nr. 178) IEEE Control Systems Society Conference Management System.
Antonov, S., Verhelst, C., Helsen, L. (2011). Control of Ground Coupled Heat Pump Systems in Offices to Optimally Exploit Ground Thermal Storage on the Long Term. . Innostock 2012. Lleida, Spain, 16-18 May 2012.
Monteyne, G., Verhelst, C., Helsen, L., Vandersteen, G. (2011). On the Use of Laplace and Warburg Variables for Heat Diffusion Modeling. . International Conference on Environment and Electrical Engineering. Rome, 8-11 May 2011 (art.nr. 111).
Verbruggen, B., Van Roy, J., De Coninck, R., Baetens, R., Helsen, L., Driesen, J. (2011). Object-Oriented Electrical Grid and Photovoltaic system modelling in Modelica. . 8th International Modelica Conference. Dresden, Germany, 20-22 March 2011 (pp. 730-738).
Verbruggen, B., De Coninck, R., Baetens, R., Saelens, D., Helsen, L., Driesen, J. (2011). Grid impact indicators for active building simulation. Innovative Smart Grid Technologies (ISGT), 2011 IEEE PES. IEEE PES Innovative Smart Grid Technologies Conference. Anaheim, USA, 17-19 January 2011 (pp. 127-132) Institute of Electrical and Electronics Engineers ( IEEE ).
Monteyne, G., Vandersteen, G., Verhelst, C., Helsen, L. (2011). Comparison of Rational Heat Diffusion Model in Laplace and Warburg Variable. . 30th Benelux Meeting on Systems and Control. Lommel, Belgium, 15-17 March 2011.
Baetens, R., De Coninck, R., Helsen, L., Saelens, D. (2010). The impact of heat emission system on the grid-interaction of building integrated photovoltaics in low-energy dwellings. 8th International Conference on System Simulation. SSB 2010. Liège, 13-15 December 2010 (art.nr. art. 137) (pp. 13 p.).
De Coninck, R., Baetens, R., Verbruggen, B., Saelens, D., Driesen, J., Helsen, L. (2010). Modelling and simulation of a grid connected photovoltaic heat pump system with thermal energy storage using Modelica. 8th International Conference on System Simulation. SSB. Liège, 13-15 December 2010 (art.nr. art 177) (pp. 21 p.).
Sourbron, M., Helsen, L. (2010). Thermally activated building systems in office buildings: impact of control strategy on energy performance and thermal comfort. . International Conference on System Simulation in Buildings. Liege, 13-15 December 2010.
Helsen, L., Bosmans, A. (2010). Waste-to-Energy through thermochemical processes: matching waste with process. In Jones, P. (Ed.), Tielemans, Y. (Ed.), Proceedings of the International Academic Symposium on Enhanced Landfill Mining. Enhanced Landfill Mining and the transition to Sustainable Materials Management. Houthalen-Helchteren, 4-6 October 2010 (pp. 133-180). Houthalen-Helchteren: Haletra.
Baetens, R., De Coninck, R., Helsen, L., Saelens, D. (2010). The impact of domestic load profiles on the grid-interaction of building integrated photovoltaic (BIPV) systems in extremely low-energy dwellings. Zero Emission Buildings. Renewable Energy Research Conference. Trondheim, 7-8 June 2010 (pp. 3-14).
Cuypers, F., Helsen, L. (2010). Heavy metal retention during low temperature pyrolysis of Chromated Copper Arsenate (CCA) treated wood waste: comparison between model compounds and real CCA treated wood pyrolysis. . WasteEng 2010. Beijing, China, 17-19 May 2010.
Bosmans, A., Helsen, L. (2010). Energy from waste: review of thermochemical technologies for refuse derived fuel (RDF) treatment. . Venice 2010 International Symposium on Energy from Biomass and Waste. Venice, Italy, 8-11 November 2010 (art.nr. 277).
Verhelst, C., Axehill, D., Jones, C., Helsen, L. (2010). Study of optimal control formulations for an air-to-water heat pump system. . International Conference on System Simulation in Buildings. Liège, 13-15 December 2010.
Sourbron, M., Helsen, L. (2010). Identifying appropriate thermal comfort criteria for buildings equipped with thermally active building systems (TABS). 10th REHVA WORLD CONGRESS "Sustainable Energy Use in Buildings". CLIMA 2010. Antalya, Turkey, 9-12 May 2010 (art.nr. R7-TS47-OP01).
Degrauwe, D., Verhelst, C., Logist, F., Van Impe, J., Helsen, L. (2010). Multi-objective optimal control of an air-to-water heat pump for residential heating. . International Conference on System Simulation in Buildings. Liège (Belgium), 13-15 December, 2010 (art.nr. 14 p., ID 152).
Govaerts, J., Helsen, L. (2010). Modelling of a strongly coupled Thermal, Hydraulic and Chemical problem: drying and low-temperature pyrolysis of CCA-wood waste particles in a moving bed reactor. . COMSOL Conference. Paris, France, 17-19 November 2010.
Sourbron, M., Baelmans, M., Helsen, L. (2009). Thermal response of thermally activated building systems (TABS) in office buildings. Proceedings of EFFSTOCK 2009. Effstock 2009. Stockholm, Sweden, 14-17 June 2009.
Verhelst, C., Vandersteen, G., Schoukens, J., Helsen, L. (2009). A linear dynamic borehole model for use in model based predictive control. Proceedings of EFFSTOCK 2009. Effstock 2009. Stockholm, Sweden, 14-17 June 2009 (art.nr. 82).
Sourbron, M., Khaldi, F., Baelmans, M., Helsen, L. (2008). Validation of a thermally activated hollow core slab RC-model with measurements and FEM simulations. Proceedings of the Symposium Building Physics. Symposium Building Physics. Leuven, Belgium, Oct 29-31, 2008.
Sourbron, M., Verhelst, C., Helsen, L. (2008). Monitoring an office building equipped with thermally activated building systems (TABS) and a ground source heat pump. Proceedings of the Heat Pump Platform Symposium. Heat Pump Platform Symposium. Sint-Katelijne-Waver, Belgium, Sep 17, 2008.
Verhelst, C., De Ridder, F., Helsen, L. (2008). System identification of a borehole thermal energy storage system for application in optimal control. Proceedings of the Heat Pump Platform Symposium. Heat Pump Platform Symposium. Sint-Katelijne-Waver, Belgium, Sep 17, 2008.
Cuypers, F., De Dobbelaere, C., Hardy, A., Van Bael, M., Helsen, L. (2008). Thermogravimetric analysis of As2O3 adsorbed on activated carbon. Proceedings of the 2nd International Conference on Engineering for Waste Valorisation. 2nd International Conference on Engineering for Waste Valorisation. Patras, Greece, Jun 3-5, 2008 (pp. 93-101).
Govaerts, J., Helsen, L. (2008). Simulation of the Chartherm reactor developed to treat chromated copper arsenate (CCA) impregnated wood waste. Proceedings of the 2nd International Conference on Engineering for Waste Valorisation. 2nd International Conference on Engineering for Waste Valorisation. Patras, Greece, Jun 3-5, 2008 (pp. 60-68).
Verhelst, C., Nolens, H., Schoovaerts, K., Helsen, L. (2008). Performance of an air-to-water heat pump system in a low energy residential building: modelling and experimental results. Proceedings of the 9th IEA Heat Pump Conference. 9th IEA Heat Pump Conference. Zürich, Switserland, May 20-22, 2008.
Sourbron, M., De Herdt, R., Van Reet, T., Van Passel, W., Baelmans, M., Helsen, L. (2007). Thermal activated building systems (TABS): current practice. Proceedings of the Passive House Symposium. Passive House Symposium. Brussels, Belgium, Sep 7, 2007 (pp. 303-310).
Peeters, L., Van der Veken, J., Hens, H., Helsen, L., D'haeseleer, W. (2007). Sizing of boilers for residential buildings. Proceedings of the REHVA Clima WellBeing Indoors Conference. REHVA Clima WellBeing Indoors Conference. Helsinki, Finland, Jun 10-14, 2007.
Humar, M., Ribeiro, A., Amartey, S., Helsen, L., Ottosen, L. (2007). Remediation of CCA treated wood waste. Proceedings of the 3rd Conference of COST Action E31, Management of recovered wood - Reaching a higher technical, economic and environmental standard in Europe. 3rd Conference of COST Action E31, Management of recovered wood - Reaching a higher technical, economic and environmental standard in Europe. Klagenfurt, Austria, May 2-4, 2007.
Van der Veken, J., Hens, H., Peeters, L., Helsen, L., D'haeseleer, W. (2006). Economy, energy and ecology based comparison of heating systems in dwellings. Proceedings of the Third international Building Physics Conference. Third international Building Physics Conference. Montreal, Canada, Aug 27-31, 2006 (pp. 661-668). Montreal.
Peeters, L., Van der Veken, J., Helsen, L., D'haeseleer, W., Hens, H. (2006). The performance of different heating systems in residential buildings with varying insulation quality. Proceedings of the Esim Conference. Energy Simulation Conference. Toronto, Canada, 3-4 May 2006 (pp. 165-172).
Peeters, L., Helsen, L., D'haeseleer, W. (2005). Prediction of next day's heat demand to minimise heat-pump heating costs. Proceedings of the Rehva Conference CLIMA: Vol. 17. Rehva Conference CLIMA. Lausanne, Switzerland, Oct 9-12, 2005 (pp. 291-296).
Peeters, L., Helsen, L., D'haeseleer, W. (2005). Comparison of heating systems in a residential building. Proceedings of the International Building Performance Simulation Association. International Building Performance Simulation Association. Montreal, Canada, Aug 15-18, 2005 (pp. 1277-1284).
D'haeseleer, W., Helsen, L. (2005). European Sustainable Electricity; Comprehensive Analysis of Future Demand and Generation of European Electricity and its Security of Supply. Proceedings of the Risoe International Energy Conference 2005. Risoe International Energy Conference 2005. Roskilde, Denmark, May 23-25, 2005.
Jouret, N., Helsen, L., Van den Bulck, E. (2005). Study of the wood gasifier at the power plant of Electrabel Ruien. Proceedings of the European Combustion Meeting. European Combustion Meeting. Louvain-la-Neuve, Apr 3-6, 2005.
Helsen, L., Van den Bulck, E. (2004). Review of thermochemical conversion processes as disposal technologies for chromated copper arsenate (CCA) treated wood waste. Proceedings of the Environmental Impacts of Preservative Treated Wood Conference. Environmental Impacts of Preservative Treated Wood Conference. Orlando, Florida, USA, Feb 8-11, 2004.
Helsen, L., Van den Bulck, E., Hery, J. (1998). Total recycling of CCA treated wood waste by low-temperature pyrolysis. Proceedings of the International Conference on Incineration and Thermal Treatment Technologies. International Conference on Incineration and Thermal Treatment Technologies. California, USA, 1998 (pp. 341-347).
Helsen, L., Van den Bulck, E. (1997). Release of metals during the pyrolysis of preservative impregnated wood. Proceedings of the Developments of Thermochemical Biomass Conversion (DTBC) Conference. Developments of Thermochemical Biomass Conversion (DTBC) Conference. Banff, Canada, May 20-24, 1996 (pp. 220-228).
Baetens, R., De Coninck, R., Verbruggen, B., Driesen, J., Helsen, L., Saelens, D. (2010). De impact van gebruisprofielen op de integratie van fotovoltaïsche systemen voor lage-energie woningen. Simulatie voor energie-efficiënte of energieproducerende gebouwde omgeving. IBPSA-NVL Event 2010. Eindhoven, 14 October 2010 (pp. ID21-8).
Verhelst, C., Helsen, L. (2007). Modelgebaseerde regeling van grondgekoppelde warmtepompsystemen in kantoorgebouwen. Proceedings of the KVIV Symposium "Mooi bedacht, nuttig toegepast", Sessie Energie. KVIV Symposium "Mooi bedacht, nuttig toegepast", Sessie Energie. Brussels, Belgium, Nov 28, 2007.
Sourbron, M., Helsen, L. (2011). Thermally Activated Building Systems: Exploiting inertia. KIC-InnoEnergy Storage, 22-23 November 2011.
De Coninck, R., Verhelst, C., De Broe, A., Woyte, A., Helsen, L. (2011). Needs for Optimal Control in Renewable Energy Systems. Austrian-French-German Conference on Optimization. Toulouse, 19-23 September 2011.
Verhelst, C., Sourbron, M., Antonov, S., Helsen, L. (2011). Towards MPC for office buildings with TABS connected to a GCHP system. IBPSA Model Predictive Control in Buildings Workshop.
Antonov, S., Verhelst, C., Monteyne, G., Vandersteen, G., Helsen, L. (2011). Model Predictive Control of Ground Coupled Heat Pump Systems. 5th Strategic Energy Forum. Brussels, 11 May 2011.
Helsen, L. (2011). Mobilizing geothermal energy and thermal inertia for the smart energy supply of buildings. Strategic Energy Forum A CO2-lean energy society by 2050. Brussel, 11 May 2011.
Hoogmartens, J., Helsen, L., Van den Schoor, F., Franck, G., Van Passel, W. (2011). Results of Belgium's largest domestic heat pump field test. Strategic Energy Forum. Brussel, 11 May 2011.
Helsen, L., Cuypers, F. (2011). Rules of thumb for reactor design and process conditions for thermochemical treatment of chromated copper arsenate (CCA) treated wood waste. AIChE 2011 Annual Meeting. Minneapolis, US, 16-21 October 2011.
Helsen, L., Verhelst, C. (2010). Physical Modelling of Buildings. Advanced HVAC Control. Prague (Czech Republic), 13-17 September 2010.
Helsen, L. (2010). Collaboration Academics - Industry. Advanced HVAC Control. Prague (Czech Republic), 13-17 September 2010.
Helsen, L., Verhelst, C. (2010). Parameter estimation of physical models for application in building control. Advanced HVAC Control. Prague (Czech Republic), September 13-17.
De Herdt, R., Van Gysel, A., Van den Schoor, F., Helsen, L. (2010). Best use of solar energy in combination with heat pumps in dwellings: a major role for thermal storage. IEA SHC Task 44 meeting. Bolzano, Italy, April 29-30, 2010.
Van den Schoor, F., De Coninck, R., Helsen, L. (2010). Field tests in Belgium. IEA SHC Task 44 meeting. Bolzano, Italy, April 29-30, 2010.
Sourbron, M., Helsen, L. (2009). Do adaptive thermal comfort models lower energy use in moderate climates?. Strategic Energy Forum. Brussels, Belgium, 10 December 2009.
De Herdt, R., Van Gysel, A., Van den Schoor, F., Helsen, L. (2009). Solar energy combined with heat pumps in dwellings: a major role for thermal energy storage. Strategic Energy Forum. Brussels, Belgium, 10 December 2009.
Helsen, L. (2009). Heat pumps combined with solar energy - a success story?. Daikin Konwakai Meeting. Oostende, Belgium, 12-14 November 2009.
Cuypers, F., Helsen, L. (2009). Valorisation of wood waste: pyrolysis of CCA wood. Strategic Energy Forum. Brussels, Belgium, 10 December 2009.
Hoogmartens, J., Helsen, L. (2009). Determination of Seasonal Performance Factors (SPF) for residential heat pump systems. Strategic Energy Forum. Brussels, Belgium, 10 December 2009.
Helsen, L. (2009). Presentation of KULeuven-TME with respect to activities related to the combination of heat pumps and solar energy. IEA-SHC-Task 44 Definition Meeting. Rapperswil, Switzerland, 29-30 October 2009.
Helsen, L., Verhelst, C., Sourbron, M. (2008). Thermal systems in buildings: a hot research topic at the Division Applied Mechanics and Energy Conversion (K.U. Leuven). Proceedings of the Heat Pump Platform Symposium. Heat Pump Platform Symposium. Sint-Katelijne-Waver, Belgium, Sep 17, 2008.
Sourbron, M., Helsen, L. (2008). Monitoring of ICT3 and ICT4 office buildings Wetenschapspark Arenberg. Annex 48 meeting. Münster, Germany, 8-9 April 2008.
Cuypers, F., Helsen, L. (2008). Waste valorization: pyrolysis of CCA-treated wood. Strategic Energy Forum. Brussels, 16 December 2008.
Sourbron, M., Helsen, L. (2008). The effect of control strategy on the energy efficiency of thermally activated building systems. Strategic Energy Forum. Brussels, 16 December 2008.
Helsen, L. (2008). Air-water heat pumps in low energy dwellings - a case study. Daikin Konwakai Meeting. Japan, 4-9 November 2008.
Verhelst, C., Helsen, L. (2008). Heating and cooling with ground coupled heat pumps. Strategic Energy Forum. Brussels, 16 December 2008.
Hoogmartens, J., Franck, G., Helsen, L., Van Passel, W. (2008). WP-DIRECT: heat pumps - Sustainable, Innovative and Realistic Energy Concepts. Strategic Energy Forum. Brussels, 16 December 2008.
Sourbron, M., Baelmans, M., Helsen, L. (2007). How efficiently produced heat and cold is squandered by inappropriate control strategies: Analysing TABS control strategies by measurements and simulations. Common technical briefing of ECBCS and HPP, Energy conservation in buildings and heat pump use. Brussels, Belgium, Nov 14, 2007.
Verhelst, C., Helsen, L. (2007). Modelling of an air-to-water heat pump system in a low energy residential building. Proceedings of the IEA Annex 48 Meeting. IEA Annex 48 Meeting. Luik, Belgium, Oct 1, 2007.
Sourbron, M., De Herdt, R., Van Reet, T., Van Passel, W., Baelmans, T., Helsen, L. (2007). Control of an office building equipped with thermally activated building systems (TABS): a case study. Proceedings of the IEA Annex 48 Meeting. IEA Annex 48 Meeting. Luik, Belgium, Oct 1, 2007.
Helsen, L. (2005). Presentation of the Chartherm process. EU-COST E31 Meeting. Bordeaux, France, Sep 29 - Oct 1, 2005.
Luickx, P., Peeters, L., Helsen, L., D'haeseleer, W. (2005). The PROMIX simulation tool: an exercise for the massive introduction of heat pumps and its influence on the electricity-generation mix and GHG emissions. Workshop on Market Modelling of the Central Western European Electricity Market. Leuven, Belgium, Sep 15-16, 2005.
Helsen, L. (2003). Disposal of chromated copper arsenate (CCA) treated wood waste: is low-temperature pyrolysis an option?. 6th Workshop of COST Action E22 Environmental optimisation of wood protection. Zagreb, Croatia, Sep 22-23, 2003.
Helsen, L., Van den Bulck, E. (2002). Low-temperature pyrolysis of CCA treated wood waste: mechanism responsible for arsenic release. Proceedings of the Expert Meeting Pyrolysis and Gasification of Biomass and Waste (PGBW). Expert Meeting Pyrolysis and Gasification of Biomass and Waste (PGBW). Strasbourg, France, Sep 29 - Oct 2, 2002.
Helsen, L., Van den Bulck, E., Van Bael, M., Mullens, J. (2002). Arsenic release during pyrolysis of CCA treated wood waste: current state of knowledge. Proceedings of the Pyrolysis Conference. Pyrolysis Conference. Leoben, Austria, Sep 17-20, 2002.
Helsen, L., Van den Bulck, E. (2002). Disposal of CCA treated wood waste: study of low-temperature pyrolysis. Proceedings of the Symposium "Handling of Impregnated Wood". Symposium "Handling of Impregnated Wood". Silkeborg, Denmark, Sep 25, 2002.
Helsen, L. (2001). The application of pyrolysis for the disposal of CCA treated wood waste. the meeting Bio-energy conversion: pyrolysis of biomass and trends of R&D in bio-energy conversion technology. Gembloux, Belgium, Feb 26, 2001.
Helsen, L., Van den Bulck, E. (2000). Low-temperature pyrolysis as a possible technique for the disposal of CCA treated wood waste: metal behaviour. Proceedings of the Progress in Thermochemical Biomass Conversion (PTBC) Conference. Progress in Thermochemical Biomass Conversion (PTBC) Conference. Tyrol, Austria, Sep 18-22, 2000.
Van den Bulck, E., Helsen, L. (1997). Modelling of the pyrolysis of wood particles using the IPSA two-phase option within PHOENICS. 16th Belgian-Dutch PHOENICS User Meeting. 16th Belgian-Dutch PHOENICS User Meeting. Delft, The Netherlands, May 28, 1997.
Van den Broeck, K., Vandecasteele, C., Celens, C., Vermeulen, S., Helsen, L., Van den Bulck, E. (1997). Determination and specification of As, Cu and Cr in CCA treated wood and its pyrolysis residues by inductively coupled plasma mass spectrometry. Proceedings of the European Winter Conference on Plasma Spectrochemistry. European Winter Conference on Plasma Spectrochemistry. Gent, Belgium, Jan 12-17, 1997.
Van den Broeck, K., Vandecasteele, C., Celens, C., Vermeulen, S., Helsen, L., Van den Bulck, E. (1997). Determination and speciation of copper, chromium and arsenic in CCA treated wood and its pyrolysis residues by inductively coupled plasma mass spectrometry. European Winter Conference on Plasma Spectrochemistry. Gent, 1997.
Geysen, D., Bosmans, A., Helsen, L. (2010). Presentatie: KULeuven Second Opinion over de Gasplasma™ testen uitgevoerd met RDF van Group Machiels. Workshop Group Machiels. Leuven, Belgium, 29 Oktober 2010.
Hoogmartens, J., Helsen, L., Van Passel, W., Franck, G. (2010). De impact van regelparameters op de prestatie van residentiële warmtepompinstallaties aan de hand van simulaties. WPP Symposium. Sint-Katelijne Waver, 15 september 2010.
Sourbron, M., Helsen, L. (2010). Betonkernactivering : benutten van traagheid. Studiedag Geothermie en Betonkernactivering. Hasselt, Belgium, 20 May 2010.
Sourbron, M., Helsen, L. (2010). De invoering van het Quest/EHPA-product label voor warmtepompen in België. WPP Symposium. Sint-Katelijne-Waver, Belgium, 15 september 2010.
Hoogmartens, J., Helsen, L., Frank, G., Van Passel, W. (2009). Warmtepompen in EPB-software. WPP Symposium. Sint-Katelijne Waver, 16 september 2009.
Verhelst, C., Helsen, L. (2009). Model predictive control of ground coupled heat pump systems. Optec Dynamic Optimization Software Meeting. Leuven, 22 April 2009.
De Herdt, R., Van Gysel, A., Helsen, L. (2009). Warmtepompen en zonne-energie: een geslaagde combinatie?. Warmtepomp Platform Symposium. Sint-Katelijne-Waver, Belgium, 16 September 2009.
Hoogmartens, J., Sourbron, M., Helsen, L. (2009). Energie in gebouwen: meten is weten. VERA Overlegavond Beleidsmakers Vlaams-Brabant. Kampenhout, Belgium, 8 Oktober 2009.
Sourbron, M., Helsen, L. (2008). ICT3 en ICT4 kantoorgebouwen Wetenschapspark Arenberg. Interleuven, 15 April 2008.
Helsen, L. (2008). Lucht-water warmtepompen in lage-energie woningen: een toets met de praktijk. the Daikin Product Launch. Beersel, Belgium, Jan 30, 2008.
Helsen, L. (2008). WarmtePompPlatform Vlaanderen. Heat Pump Platform Symposium. Sint-Katelijne-Waver, Belgium, Sep 17, 2008.
Verhelst, C., Helsen, L. (2007). Heat pumps in residential buildings. ATIC meeting "De warmtepomp in de woning, al dan niet omkeerbaar, de uitrusting voor morgen?". Brussels, Belgium, Oct 18, 2007.
Helsen, L. (2005). De ene warmte is de andere niet. KVIV-studiedag "Lage temperatuur en toch warm!". Gent, Belgium, Nov 16, 2005.
Helsen, L., Van den Bulck, E. (2001). Thermische analyse: vergelijking tussen onbehandeld en CCA behandeld hout. Symposium Thermische Analyse, Limburgs Universitair Centrum. Diepenbeek, Belgium, May 4, 2001.
Verhelst, C., Helsen, L. (sup.), D'haeseleer, W. (sup.) (2012). Model Predictive Control of Ground Coupled Heat Pump Systems in Office Buildings (Modelgebaseerde regeling van grondgekoppelde warmtepompsystemen in kantoorgebouwen).
Cuypers, F., Helsen, L. (sup.), D'haeseleer, W. (sup.) (2011). Low Temperature Pyrolysis of Chromated Copper Arsenate (CCA) Treated Wood: Influence of Process Conditions on Heavy Metal Volatilization (Lage temperatuur pyrolyse van CCA afvalhout-invloed van proces condities op de vervluchtiging van zware metalen).
Helsen, L., Van den Bulck, E. (sup.) (2000). Low-temperature pyrolysis of CCA treated wood waste.
Helsen, L. (2011). Thermal Carbonisation of Chromated Copper Arsenate (CCA) Treated Wood Waste. Final Report KULeuven OT Project.
Cuypers, F., Helsen, L. (2010). Explosion safety during low temperature pyrolysis of CCA treated wood.
Govaerts, J. (2009). Material and energy recuperation from chromated copper arsenate (CCA) impregnated wood waste through carbonization: dynamic model.
Bosmans, A., Helsen, L. (2009). First order reaction kinetic scheme for arsenic release during low temperature pyrolysis of CCA treated wood in the temperature range 300°C - 450°C.
Cuypers, F., Helsen, L. (2007). Risico-analyse van laboschaal pyrolyse opstelling.
Cuypers, F., Helsen, L. (2007). Internal report: testing of the experimental setup and validation of measurement methods.
Cuypers, F., Helsen, L. (2007). Risico-analyse TGA experimenten @ U.Hasselt.
Peeters, L., Helsen, L., D'haeseleer, W. (2007). Deel 3b: Optimalisatie van installaties; analyse per systeem: controlestrategieën : Eindrapport GBOU-project 020212: Ontwikkeling via levenscyclusoptimalisatie van extreem lage energie- en pollutiewoningen.
Helsen, L., Van den Bulck, E. (2000). Study of a pulsating flow in a complex engine exhaust manifold: experiments.
Helsen, L., Van den Bulck, E. (1995). Delayed burning of CCA treated wood under reducing atmosphere.
Helsen, L., Van den Bulck, E. (1995). Delayed burning of CCA treated wood under reducing atmosphere.
Helsen, L., Van den Bulck, E. (1995). Delayed burning of CCA treated wood under reducing atmosphere.
Helsen, L., Van den Bulck, E. (1994). Delayed burning of CCA treated wood under reducing atmosphere.
Helsen, L., Van den Bulck, E. (1994). Delayed burning of CCA treated wood under reducing atmosphere.
Helsen, L., Van den Bulck, E. (1994). Delayed burning of CCA treated wood under reducing atmosphere.
Helsen, L., Van den Bulck, E. (1994). Delayed burning of CCA treated wood under reducing atmosphere.
Helsen, L., Van den Bulck, E. (1994). Delayed burning of CCA treated wood under reducing atmosphere.
Helsen, L., Van den Bulck, E. (1994). Delayed burning of CCA treated wood under reducing atmosphere.
Helsen, L., Van den Bulck, E. (1994). Delayed burning of CCA treated wood under reducing atmosphere.
Hoogmartens, J., Helsen, L. (2011). GEOTABS: Grondgekoppelde warmtepompen gecombineerd met betonkernactivering in kantoorgebouwen.
Vanneste, J., Van Gerven, T., Van der Bruggen, B., Helsen, L. (2011). Inzet van biologische afval - Gevalstudie niet-verontreinigd houtafval, 124 pp: Vlaamse Milieumaatschappij - MIRA.
Geysen, D., Bosmans, A. (2010). Second opinion on the technical due diligence performed by group Machiels on the gasplasma technology.
Hoogmartens, J., Helsen, L., Franck, G., Van Passel, W., Baumans, A. (2011). Metingen van warmtepompen in de praktijk. De Onderneming.
Hoogmartens, J., Helsen, L., Franck, G., Van Passel, W., Baumans, A. (2011). Mesure des performances de pompes à chaleur dans la pratique. L'Entreprise: sanitary-heating-airconditioning, 882, 78-84.
Hoogmartens, J., Helsen, L., Sourbron, M., Saelens, D., Parys, W., Verhelst, C. (2011). GEOTABS: Towards optimal design and control of geothermal heat pumps combined with thermally activated building systems in offices.
De Coninck, R., Baetens, R., Verbruggen, B., Van Roy, J., Driesen, J., Saelens, D., Helsen, L. (2011). Optimal Energy Networks for Buildings.
Hoogmartens, J., Helsen, L., Baumans, A. (2010). Warmtepompen in de EPB software. De Onderneming, 865, 54-55.
De Herdt, R., Van den Schoor, F., Van Gysel, A., Helsen, L. (2010). Combinatie van warmtepompen en thermische zonne-energie – Een overzicht van de mogelijkheden. De Onderneming (865), 50-52.
Hoogmartens, J., Helsen, L., Bauwmans, A. (2010). Les pompes à chaleur dans le sofware PEB. L'Entreprise: sanitary-heating-airconditioning, 865, 54-56.
Hoogmartens, J., Helsen, L., Franck, G., Van Passel, W. (2010). Prestaties van grondgekoppelde warmtepompen. Nieuwsbrief Milieutechnologie, 17 (2), 5-8.
Helsen, L., Sourbron, M., Verhelst, C. (2008). Milieutechnologie : Grondgekoppelde warmtepompen als bron voor betonkernactivering. Nieuwsbrief Milieutechnologie (10-extra).
Sourbron, M., Van Passel, W., Helsen, L. (2008). Het belang van regelstrategie in thermisch actieve gebouwen - metingen in een kantoorgebouw met betonkernactivering. De Onderneming, 848, 70-73.
Two OPTEC professors have been awarded three "Gouden Krijtjes", the yearly teaching awards given by the organization of engineering students (vtk). Prof. Lombaert was awarded the prize for the best course in civil engineering, and Prof. Diehl the prizes for the best professor and the best course in mathematical engineering (where he teaches numerical optimization). They received these awards at the yearly "proffentap" where experienced students taught them how to draft beer professionally.
