Thermodynamic and exergo-economic analyses of an innovative semi self-feeding energy system synchronized with waste-to-energy technology

2020 ◽  
Vol 40 ◽  
pp. 100759
Author(s):  
Ehsan Akrami ◽  
Mohammad Ameri ◽  
Matteo V. Rocco ◽  
Francesco D. Sanvito ◽  
Emanuela Colombo
Keyword(s):  
Energy System ◽  
Waste To Energy ◽  
Energy Technology ◽  
Economic Analyses

scholarly journals Thermodynamic and Economic Analyses of a New Waste-to-Energy System Incorporated with a Biomass-Fired Power Plant

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4345
Author(s):  
Peiyuan Pan ◽  
Meiyan Zhang ◽  
Gang Xu ◽  
Heng Chen ◽  
Xiaona Song ◽  
...  
Keyword(s):  
Power Plant ◽  
Net Present Value ◽  
Performance Enhancement ◽  
Integrated Design ◽  
Energy System ◽  
Waste To Energy ◽  
Low Pressure Turbine ◽  
Energy Plant ◽  
Energy And Exergy ◽  
Economic Analyses

A novel design has been developed to improve the waste-to-energy process through the integration with a biomass-fired power plant. In the proposed scheme, the superheated steam generated by the waste-to-energy boiler is fed into the low-pressure turbine of the biomass power section for power production. Besides, the feedwater from the biomass power section is utilized to warm the combustion air of the waste-to-energy boiler, and the feedwater of the waste-to-energy boiler is offered by the biomass power section. Based on a 35-MW biomass-fired power plant and a 500-t/d waste-to-energy plant, the integrated design was thermodynamically and economically assessed. The results indicate that the net power generated from waste can be enhanced by 0.66 MW due to the proposed solution, and the waste-to-electricity efficiency increases from 20.49% to 22.12%. Moreover, the net present value of the waste-to-energy section is raised by 5.02 million USD, and the dynamic payback period is cut down by 2.81 years. Energy and exergy analyses were conducted to reveal the inherent mechanism of performance enhancement. Besides, a sensitivity investigation was undertaken to examine the performance of the new design under various conditions. The insights gained from this study may be of assistance to the advancement of waste-to-energy technology.

scholarly journals Towards the Design of Resilient Waste-to-Energy Systems Using Bayesian Networks

2018 ◽  
Author(s):  
W. H. Jonathan Mak ◽  
Michel-Alexandre Cardin ◽  
Liu Ziqi ◽  
P. John Clarkson
Keyword(s):  
Bayesian Networks ◽  
Net Present Value ◽  
Energy System ◽  
Waste To Energy ◽  
Engineering System ◽  
Design Strategies ◽  
Expansion Strategy ◽  
Fixed Design ◽  
The Impact ◽  
Initial Capacity

The concept of resilience has emerged from various domains to address how systems, people and organizations can handle uncertainty. This paper presents a method to improve the resilience of an engineering system by maximizing the system economic lifecycle value, as measured by Net Present Value, under uncertainty. The method is applied to a Waste-to-Energy system based in Singapore and the impact of combining robust and flexible design strategies to improve resilience are discussed. Robust strategies involve optimizing the initial capacity of the system while Bayesian Networks are implemented to choose the flexible expansion strategy that should be deployed given the current observations of demand uncertainties. The Bayesian Network shows promise and should be considered further where decisions are more complex. Resilience is further assessed by varying the volatility of the stochastic demand in the simulation. Increasing volatility generally made the system perform worse since not all demand could be converted to revenue due to capacity constraints. Flexibility shows increased value compared to a fixed design. However, when the system is allowed to upgrade too often, the costs of implementation negates the revenue increase. The better design is to have a high initial capacity, such that there is less restriction on the demand with two or three expansions.

Municipal Solid Waste to Energy Technology

2017 ◽  
pp. 389-401 ◽  
Author(s):  
Stefano Consonni ◽  
Lidia Lombardi ◽  
Federico Viganò
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Waste To Energy ◽  
Energy Technology

Changing Waste-to-Energy in Nashville, Tennessee

2003 ◽  
Author(s):  
Harvey W. Gershman ◽  
David L. Seader
Keyword(s):  
Waste Management ◽  
Solid Waste ◽  
Planning Process ◽  
Solid Waste Management ◽  
Energy System ◽  
Primary Energy ◽  
Waste To Energy ◽  
Energy Supply System ◽  
District Energy ◽  
Integrated Solid Waste Management

For almost 30 years, the Metropolitan Government of Nashville and Davidson County has been relying on one of the more innovative approaches to waste management. Since the early 1970s, the now 1,000 tons per day WTE facility has been the primary energy source for supplying steam and chilled water for a downtown district energy system serving some 39 buildings. A recent review of alternatives has resulted in Metro deciding to close the facility and replace it with a more traditional district energy supply system and at the same time re-engineer its solid waste management programs to include more efficient collection and recycling programs. This paper will present the planning process and analysis that were done; describe the key factors that led to Metro Nashville’s decisions; detail the procurement and development process that has been initiated; and outline the timetable for implementing the decided upon changes. The authors believe this case study will provide insights for other WTE projects that from time to time struggle with peaceful co-existence with other elements of integrated solid waste management. The authors have been serving as advisors to Metro throughout this process. Mr. Gershman has recently been designated by Metro as its overall Project Manager for its District Energy System.

Advancing Waste to Energy Technology Design and Performance of EPI Fluidized Bed RDF-Fired Power Plants Worldwide

2002 ◽  
Author(s):  
Michael L. Murphy
Keyword(s):  
Power Plants ◽  
Systems Design ◽  
Energy Systems ◽  
The United States ◽  
Waste To Energy ◽  
Energy Technology ◽  
Performance Requirements ◽  
And Performance ◽  
Energy Products ◽  
Changes Over Time

Energy Products of Idaho has designed and installed numerous waste to energy systems in the United States and Europe, with others currently under development. Among the latest are a number of installations in operation and/or construction in Italy. The systems design have undergone some changes over time to stay ahead of changing regulations performance requirements.

Thermodynamic Performance Study of the SOFC-GT-RC System Fueled by LNG With Zero-CO2 Emission

2018 ◽  
Author(s):  
Xiaoyu Yang ◽  
Hongbin Zhao
Keyword(s):  
Power Efficiency ◽  
Energy System ◽  
Total Power ◽  
Operating Parameters ◽  
Energy Technology ◽  
Performance Study ◽  
Distributed Energy ◽  
Utilization Factor ◽  
Thermodynamic Performance ◽  
Cold Energy

Distributed energy technology is an important developing direction of the future energy technology. This paper puts forward a distributed energy system named SOFC-GT-RC with LNG as fuel and recovering carbon dioxide. In the system, the cold energy of LNG can not only cool the compressor inlet air to reduce consumption of compressor work, but also to supply cold energy and to get zero-CO2 and other emissions. Based on mathematical model of each part, the thermodynamic calculation model of the whole system is built by FORTRAN, which is embedded in ASPEN PLUS. The results of calculation indicate the thermal efficiency and total power efficiency are 74.5% and 56.7% while the exergy efficiency is 61.8%. In addition, some operating parameters such as fuel utilization factor and fuel flow rate are selected. Based on these operating parameters, the new system thermodynamic performance is studied. The results point that this SOFC-GT-RC system fueled by LNG increases the total power, decreases waste of cold energy and the pollution of the environment, which would be an effective utilization style of energy in China’s LNG satellite stations.

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