- Konstantinidis P., Spiropoulos V., Vamvakis A., Kaldellis J.K., 2000, "Energy Savings and Cost Reduction by Recycling the Demolition-Construction Debris", International Conference, Protection and Restoration of the Environment V, pp.869-878, Thassos Island, Greece
- Gaglia A., Kaldellis J., Kavadias K., Konstantinidis P., Sigalas J., Vlachou D., 2000, "Integrated Studies on Renewable Energy Sources. The Soft Energy Application Laboratory, Mechanical Engineering Department, TEI of Piraeus", World Renewable Energy Congress VI, Conference Proceedings, pp.1588-1591, Brighton, UK
- Kaldellis J.K., 2000, "Economic Viability of Wind Power Investments in Greece, Including Risk Analysis", International Conference "Wind Power for the 21st Century", Paper V2.7, Kassel, Germany
- Neonakis J.K., Kavadias K., Kaldellis J.K., 2000, "Estimating the Starting Point for Substantial Wind Energy Penetration in the Greek Market", World Renewable Energy Congress VI, Conference Proceedings, pp. 2324-2327, Brighton, UK.
- Kavadias K., Neonakis J., Kaldellis J.K, 2000, "Economic Viability of Wind Farm Investments in Greece, Using Probabilistic Analysis", International Conference "Wind Power for the 21st Century", Paper V2.6, Kassel, Germany
- Kaldellis J.K, Tsesmelis M., 2000, "Optimum Stand-Alone Wind Power System, on the Basis of Minimum Installation Cost", International Conference "Wind Power for the 21st Century", Paper V8.6, Kassel, Germany
- Christinakis E., Kavadias K., Kaldellis J.K., 2000, "Wind-Hydro Solution Possibilities for the Aegean Sea Islands", International Conference "Wind Power for the 21st Century", Paper V9.13, Kassel, Germany
- Kaldellis J.K., Kavadias K., Vlachou D., 2000, "Improving the Economic Viability of Desalination Plants", Mediterranean Conference on Policies and Strategies for Desalination and Renewable Energies, Santorini Island, Greece
- Kaldellis J.K., Kavadias K., Garofalakis J., 2000, "Renewable Energy Solution for Clean Water Production in the Aegean Archipelago Islands", Mediterranean Conference on Policies and Strategies for Desalination and Renewable Energies, Santorini Island, Greece
- K.A. Kavadias, J.K. Kaldellis, 2000, "Storage System Evaluation for Wind Power Installations", International Conference "Wind Power for the 21st Century", Paper OR7.3, Kassel, Germany
- Kaldellis J.K., Doumouliakas J., Michalis K., 2000, "Optimum Stand-Alone PV Solution, Including Financial Aspects", World Renewable Energy Congress VI, Conference Proceedings, pp.1966-1969, Brighton, UK
- Sigalas J.S., Kavadias K.A., Kaldellis J.K., 2000, "An Autonomous Anaerobic Wastewater Treatment Plant Based on R.E.S. Theoretical and Experimental Approach", International Conference, Protection and Restoration of the Environment V, pp.735-743, Thassos Island, Greece
- Kaldellis J.K., Charalambidis P., Konstantinidis P., 2000, "Feasibility Study Concerning the Future of Devaluated Autocats, Social-Environmental Cost Included", International Conference, Protection and Restoration of the Environment V, pp.879-886, Thassos Island, Greece