The Experts below are selected from a list of 27675 Experts worldwide ranked by ideXlab platform
Ling Zhang - One of the best experts on this subject based on the ideXlab platform.
-
review of energy conservation technologies for fresh air supply in zero energy buildings
Applied Thermal Engineering, 2019Co-Authors: Weijiao Li, Yazhen Chen, Ling ZhangAbstract:Abstract People spend about 90% of their time indoors. Fresh air supply in buildings can improve indoor air qualities and become a concern due to sick building syndrome (SBS) and the outbreak of the SARS. The most common method of cooling or heating fresh air is to use air handling units. However, there is often a large enthalpy difference between outdoor fresh air and indoor air, which leads to a large amount of energy consumption by fresh air systems. In order to achieve the goal of zero energy building, passive waste heat Recovery Equipment, active waste heat Recovery systems and earth-air heat exchangers have been developed to handle fresh air. This paper presents a comprehensive review on energy conservation technologies for fresh air supply, including theoretical, experimental and simulation works. The advantages and disadvantages, economy and climate adaptability of different energy conservation technologies for fresh air supply in buildings are analyzed and discussed. And then challenges and future research directions of fresh air supply technologies are discussed. This paper aims to pave a way for future research and development in fresh air supply technologies for Zero energy buildings.
Xiang Yin - One of the best experts on this subject based on the ideXlab platform.
-
a bottom up analysis of china s iron and steel industrial energy consumption and co2 emissions
Applied Energy, 2014Co-Authors: Wenying Chen, Xiang YinAbstract:China’s steel industry has grown significantly since the mid-1990s, and has been the backbone of Chinese heavy industry. It is also the most energy intensive industrial sector in China, accounting for 16.1% of total energy consumption in 2010. To assess energy consumption and CO2 emissions from China’s steel industry, a system dynamics model and a bottom-up energy system model-TIMES (The Integrated MARKAL-EFOM System) were used to analyze steel demand, energy consumption and CO2 emissions from China’s iron and steel industry from 2010 to 2050. The model results suggest that steel production in China will rise from 627 Mt in 2010, to a peak of 772 Mt in 2020, and then gradually decrease to 527 Mt in 2050. The share of Electric Arc Furnace (EAF) steel production will also increase significantly from 9.8% in 2010, to 45.6% in 2050. With the deployment of energy conservation technologies, such as Coke Dry Quenching, exhaust gas and heat Recovery Equipment, energy intensity and CO2 intensity of steel production will keep decreasing during the modeling period. In the near future, reductions in energy intensity and CO2 intensity will rely more on energy efficiency improvements; however, from a long-term perspective, structural change-the increasing share of EAF steel production, will be of great significance.
Hasna Louahlia-gualous - One of the best experts on this subject based on the ideXlab platform.
-
Review of tri-generation technologies: Design evaluation, optimization, decision-making, and selection approach
Energy Conversion and Management, 2016Co-Authors: Houssein Al Moussawi, Hasna Louahlia-gualousAbstract:Electricity, heating, and cooling are the three main components constituting the tripod of energy consumption in residential, commercial, and public buildings all around the world. Their separate generation causes higher fuel consumption, at a time where energy demands and fuel costs are continuously rising. Combined cooling, heating, and power (CCHP) or trigeneration could be a solution for such challenge yielding an efficient, reliable, flexible, competitive, and less pollutant alternative. A variety of trigeneration technologies are available and their proper choice is influenced by the employed energy system conditions and preferences. In this paper, different types of trigeneration systems are classified according to the prime mover, size and energy sequence usage. A leveled selection procedure is subsequently listed in the consecutive sections. The first level contains the applied prime mover technologies which are considered to be the heart of any CCHP system. The second level comprises the heat Recovery Equipment (heating and cooling) of which suitable selection should be compatible with the used prime mover. The third level includes the thermal energy storage system and heat transfer fluid to be employed. For each section of the paper, a survey of conducted studies with CHP/CCHP implementation is presented. A comprehensive table of evaluation criteria for such systems based on energy, exergy, economy, and environment measures is performed, along with a survey of the methods used in their design, optimization, and decision-making. Moreover, a classification diagram of the main CHP/CCHP system components is summarized. A general selection approach of the appropriate CCHP system according to specific needs is finally suggested. In almost all reviewed works, CCHP systems are found to have positive technical and performance impacts.
Joseph F Decarolis - One of the best experts on this subject based on the ideXlab platform.
-
analysis of material Recovery facilities for use in life cycle assessment
Waste Management, 2015Co-Authors: Phillip N Pressley, James W Levis, Anders Damgaard, Morton A. Barlaz, Joseph F DecarolisAbstract:Abstract Insights derived from life-cycle assessment of solid waste management strategies depend critically on assumptions, data, and modeling at the unit process level. Based on new primary data, a process model was developed to estimate the cost and energy use associated with material Recovery facilities (MRFs), which are responsible for sorting recyclables into saleable streams and as such represent a key piece of recycling infrastructure. The model includes four modules, each with a different process flow, for separation of single-stream, dual-stream, pre-sorted recyclables, and mixed-waste. Each MRF type has a distinct combination of Equipment and default input waste composition. Model results for total amortized costs from each MRF type ranged from $19.8 to $24.9 per Mg (1 Mg = 1 metric ton) of waste input. Electricity use ranged from 4.7 to 7.8 kW h per Mg of waste input. In a single-stream MRF, Equipment required for glass separation consumes 28% of total facility electricity consumption, while all other pieces of material Recovery Equipment consume less than 10% of total electricity. The dual-stream and mixed-waste MRFs have similar electricity consumption to a single-stream MRF. Glass separation contributes a much larger fraction of electricity consumption in a pre-sorted MRF, due to lower overall facility electricity consumption. Parametric analysis revealed that reducing separation efficiency for each piece of Equipment by 25% altered total facility electricity consumption by less than 4% in each case. When model results were compared with actual data for an existing single-stream MRF, the model estimated the facility’s electricity consumption within 2%. The results from this study can be integrated into LCAs of solid waste management with system boundaries that extend from the curb through final disposal.
-
analysis of material Recovery facilities for use in life cycle assessment
Waste Management, 2015Co-Authors: Phillip N Pressley, James W Levis, Anders Damgaard, Morton A. Barlaz, Joseph F DecarolisAbstract:Abstract Insights derived from life-cycle assessment of solid waste management strategies depend critically on assumptions, data, and modeling at the unit process level. Based on new primary data, a process model was developed to estimate the cost and energy use associated with material Recovery facilities (MRFs), which are responsible for sorting recyclables into saleable streams and as such represent a key piece of recycling infrastructure. The model includes four modules, each with a different process flow, for separation of single-stream, dual-stream, pre-sorted recyclables, and mixed-waste. Each MRF type has a distinct combination of Equipment and default input waste composition. Model results for total amortized costs from each MRF type ranged from $19.8 to $24.9 per Mg (1 Mg = 1 metric ton) of waste input. Electricity use ranged from 4.7 to 7.8 kW h per Mg of waste input. In a single-stream MRF, Equipment required for glass separation consumes 28% of total facility electricity consumption, while all other pieces of material Recovery Equipment consume less than 10% of total electricity. The dual-stream and mixed-waste MRFs have similar electricity consumption to a single-stream MRF. Glass separation contributes a much larger fraction of electricity consumption in a pre-sorted MRF, due to lower overall facility electricity consumption. Parametric analysis revealed that reducing separation efficiency for each piece of Equipment by 25% altered total facility electricity consumption by less than 4% in each case. When model results were compared with actual data for an existing single-stream MRF, the model estimated the facility’s electricity consumption within 2%. The results from this study can be integrated into LCAs of solid waste management with system boundaries that extend from the curb through final disposal.
Jining Chen - One of the best experts on this subject based on the ideXlab platform.
-
scenario analysis on co2 emissions reduction potential in china s iron and steel industry
Energy Policy, 2007Co-Authors: Ke Wang, Can Wang, Jining ChenAbstract:The international climate community has begun to assess a range of possible options for strengthening the international climate change effort after 2012. Analysis of the potential for sector-based emissions reduction and relevant mitigation options will provide the necessary background information for the debate. In order to assess the CO2 abatement potential of China's steel industry, a model was developed using LEAP software to generate 3 different CO2 emission scenarios for the industry from 2000 to 2030. The abatement potentials of different scenarios were compared, and their respective feasibilities were assessed according to the cost information. High priority abatement measures were then identified. The results show that the average CO2 abatement per year in the Recent Policy scenario and in the New Policy scenario, compared with the reference scenario, are 51 and 107 million tons, respectively. The corresponding total incremental costs are 9.34 and 80.95 billion dollars. It is concluded that there is great potential for CO2 abatement in China's steel industry. Adjusting the structure of the industry and technological advancement will play an important role in emissions reduction. Successful implementation of current sustainable development policies and measures will result in CO2 abatement at a low cost. However, to achieve higher levels of abatement, the cost will increase dramatically. In the near future, specific energy conservation technologies such as dry coke quenching, exhaust gas and heat Recovery Equipment will be of great significance. However, taking a long term perspective, emissions reduction will rely more on the adjustment of production processes and the application of more modern large scale plants. Advanced blast furnace technology will inevitably play an important role.