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The multi-criteria evaluation methods of complex systems such as the new and renewable technologies gradually spring up. The feasibility of energy power plants is evaluated and considered from many aspects, such as technology, economic cost and environment protection. However, the energy power plants’ ranking results in different methods or different weighs can be different. Accordingly, the sequencing results should be aggregated and analyzed, and then an integrated result should be given out. Aiming to get the specific evaluation result, 10 kinds of energy power plants, such as hydro, nuclear, wind, geothermal and biomass plants are considered and evaluated. The singular value decomposition method is employed to aggregate the evaluation results in grey relational method, PROMENTHEE II method, and other results from literature. The integrated evaluation result shows that the hydro and nuclear power plants are located on the first place and the renewable energy power plants have great potential development in the future.Copyright © 2009 by ASME

The energy consumption in the world and the environment protection impel more attention to the energy-efficient building. This paper briefly introduced the energy consumption of buildings and the endeavor to improve energy efficiency in buildings in China. The evaluation indexes for energy-efficient buildings are reviewed and they would be obtained in different ways in the lifecycle of buildings. Then the evaluation methods or systems for energy-efficient buildings are presented. It can be found that the evaluation systems are prosperously developed and the evaluations in all lifecycle of the buildings is helpful to establish the policy, encourage governments, producers and users active actions and decrease the energy consumption in buildings in the future.Copyright © 2009 by ASME

The feasibility evaluation of renewable energy power plants from multi criteria is necessary to save energy, protect environment and develop technology. This paper employs the improved elimination et choice translating reality (ELECTRE) method to evaluate 10 kinds of energy power plants in five criteria. The plants includes the coal fired, solar-thermal, geothermal, biomass, nuclear, photovoltaic solar, wind, ocean, hydro and natural gas combined cycle power plants. The evaluation criteria reflects four aspects from the technology, economy, environment and society. The concrete criteria are efficiency, installation, electricity cost, CO2 emission, and land requirement. Finally, the multi criteria evaluations show that the hydro power plant in the renewable energy are the optimal schemes at present.Copyright © 2009 by ASME

Distributed natural gas-driven combined cooling, heating and power (CCHP) systems, including various technologies, provide an alternative for the world to meet and solve energy-related problems, such as energy shortages, energy supply security, emission control, the economy and conservation of energy, etc. This paper analyzes the energy consumption structure in China at first; then the characteristics of natural gas-driven CCHP technologies, especially technical performances, are presented, as well as the status of utilization and development. The status of distributed CCHP development in China is briefly introduced by dividing China into four main sections: Beijing, Shanghai, Guangdong and other areas. Several problems regarding further distribution of natural gas-driven CCHP applications for buildings in China are discussed. It is concluded that, within decades, promising CCHP technologies can flourish with the cooperative efforts of government, energy-related enterprises and professional associations.Copyright © 2008 by ASME

The introduction of sustainable energy systems is strongly associated to what choices real estate owners make among different energy supply system options. This paper reviews briefly the evaluation criteria and methods of energy supply system, from technical, economical, environmental and social aspects. A new methodology for the integrated evaluation of the energy supply system’s feasibility is presented, which adopts the grey relational analysis method. As an example, three energy supply systems to provide cooling, heating and power to users are synthetically evaluated and compared in multi-criteria. The weights, used in multi-criteria evaluation, is discussed and suggested. The results prove that the grey relational analysis is an effective tool for decision making compared to single criteria evaluation.Copyright © 2008 by ASME