scholarly journals Feasibility of total system for ground protection – power generation - construction waste material reusing

2021 ◽  
Vol 9 (9) ◽  
pp. 418-423
Author(s):  
Shoji Yokohama
Keyword(s):  
Power Generation ◽  
Waste Material ◽  
Total System ◽  
Construction Waste

Strategic low-cost energy investment opportunities and challenges towards achieving universal access (SDG7) in each African nation

2022 ◽  
Author(s):  
Ioannis Pappis
Keyword(s):  
Power Generation ◽  
Fossil Fuel ◽  
Universal Access ◽  
Renewable Energy Sources ◽  
Electricity Consumption ◽  
Green Energy ◽  
Total System ◽  
Energy Investment ◽  
African Nation ◽  
Energy Mix

Abstract Strategic energy planning to achieve universal access and cover the future energy needs in each African nation is essential to lead to effective, sustainable energy decisions to formulate mitigation and adaptation climate change policy measures. Africa can not afford a cost-increasing green energy transition pathway towards achieving SDG7. In this analysis, least-cost power generation investment options using energy systems analysis enhanced with geospatial data for each African nation are identified, considering different levels of electricity consumption per capita (Low, High) and costs of renewables (New Policies, Renewable Deployment scenarios). The power generation capacity needs to increase between 211GW (NPLs) and 302GW (RDHs) during 2021-2030 to achieve SDG7 in Africa, leading to electricity generation to rise between 6,221PJ (NPLs) - 7,527PJ (NPHs) by 2030. Higher electricity consumption levels lead to higher penetration of fossil fuel technologies in the power mix of Africa. To achieve the same electricity demand levels, decreasing renewables' costs can assist in a less carbon-intensive power system, although higher capacity is needed. However, Africa is still hard to achieve its green revolution. Depending on the scenario, grid-connected technologies are estimated to supply approximately 85%-90% of the total electricity generated in Africa in 2030, mini-grid technologies roughly 1%-6%, and stand-alone technologies 8%-11%. Solar off-grid and solar hybrid mini-grid technologies play an essential role in electrifying the current un-electrified settlements in residential areas. Natural gas will be the dominant fossil fuel source by 2030, while the decreasing costs of renewables make solar overtake hydropower. Higher penetration of renewable energy sources in the energy mix creates local jobs and increases cost-efficiency. Approximately 6.9 million (NPLs) to 9.6 million (RDHs) direct jobs can be created in Africa by expanding the power sector during 2020-2030 across the supply chain. Increasing the electricity consumption levels in Africa leads to higher total system costs, but it is estimated to create more jobs that can ensure political and societal stability. Also, the decreasing costs of renewables could further increase the penetration of renewables in the energy mix, leading to a higher number of jobs.

EXTENDED TRIPLE BOTTOM LINE BASED EVALUATION OF REVERSE LOGISTICS OPTIONS FOR CONSTRUCTION WASTE MATERIAL

2020 ◽  
Vol 7 (2) ◽  
Author(s):  
Rana Rabnawaz Ahmed ◽  
Xueqing Zhang
Keyword(s):  
Reverse Logistics ◽  
Waste Treatment ◽  
Triple Bottom Line ◽  
Treatment Method ◽  
Waste Material ◽  
Scoring Method ◽  
Bottom Line ◽  
Middle Income ◽  
Construction Waste ◽  
Selection Of

The construction sector not only plays a significant role in the economic development of a country but also generates considerable construction waste. Treatment of such waste is essential to avoid loss of potentially recoverable material, minimize environmental pollution, reduce monetary losses, and other related hazards. Reverse logistics concept gains popularity due to its material recovery aspect, therefore considered a waste treatment option. However, the selection of the most appropriate treatment strategy requires a critical analysis of various factors. In the past, firstly, technical and economic factors were considered mainly before selecting a treatment method, with limited to no consideration given to environmental, social, and political factors, especially in low and middle-income countries. Secondly, the selection of such treatment methods was mostly based on qualitative assessments. To overcome these issues, at first, this study extends the concept of Triple Bottom Line (TBL) by adding two more lines of technical and political aspects and called it as extended TBL (ETBL). Secondly, a quantitative ETBL scoring method is proposed based on a probability-impact approach to help decision-makers select an appropriate reverse logistics option for construction waste material. A list of bottom-line factors was extracted from the comparison of existing practices among different countries. Lastly, suggestions to Hong Kong stakeholders were provided as per ETBL assessment, which will help future decision-making.

The classification of construction waste material using a deep convolutional neural network

2021 ◽  
Vol 122 ◽  
pp. 103481
Author(s):  
Peter Davis ◽  
Fayeem Aziz ◽  
Mohammad Tanvi Newaz ◽  
Willy Sher ◽  
Laura Simon
Keyword(s):  
Neural Network ◽  
Convolutional Neural Network ◽  
Waste Material ◽  
Deep Convolutional Neural Network ◽  
Construction Waste

Research of a Small-Scale Building Integrated Photovoltaic Micro-Grid System

2012 ◽  
Vol 571 ◽  
pp. 273-277
Author(s):  
Chun Feng Lv ◽  
Ai Guo Wu ◽  
Han Zhang ◽  
Fei Han
Keyword(s):  
Power Generation ◽  
Water System ◽  
Cooling Water ◽  
Small Scale ◽  
Total System ◽  
Grid System ◽  
Time Data ◽  
Cooling Water System ◽  
Building Integrated Photovoltaic ◽  
Micro Grid

The paper presents the design of a small-scale building integrated photovoltaic micro-grid system, which is a master-slave system with bi-directional battery inverter as the core of the system.A photovoltaic energy system and management system are established, which has the function of real-time data monitoring and logging，switches different micro-grid operation mode. On this basis, the photovoltaic cooling water system is presented to solve the decline in peak power generation of the system caused by the increase of the temperature of the photovoltaic panel. Experimental results show that the stability of the system can run in networked mode and island mode, cooling water system of photovoltaic panels improve the total system power generation.

Simultaneous Production of Desalinated Water and Power Using a Hybrid-Cycle OTEC Plant

1987 ◽  
Vol 109 (2) ◽  
pp. 156-160 ◽  
Author(s):  
C. B. Panchal ◽  
K. J. Bell
Keyword(s):  
Power Generation ◽  
Power System ◽  
Electric Power ◽  
Operating Parameters ◽  
Total System ◽  
Water Production ◽  
Closed Cycle ◽  
Simultaneous Production ◽  
Desalinated Water ◽  
Hybrid Cycle

A systems study for simultaneous production of desalinated water and electric power using the hybrid-cycle OTEC system was carried out. The hybrid cycle is a combination of open and closed-cycle OTEC systems. A 10 MWe shore-based hybrid-cycle OTEC plant was discussed and corresponding operating parameters were presented. Design and plant operating criteria for adjusting the ratio of water production to power generation was described and their effects on the total system were evaluated. The systems study showed technical advantages of the hybrid-cycle power system as compared to other leading OTEC systems for simultaneous production of desalinated water and electric power generation.

scholarly journals Cost optimization for the 100% renewable electricity scenario for the Java-Bali grid

2018 ◽  
Vol 7 (3) ◽  
pp. 269-276 ◽  
Author(s):  
Matthias Günther ◽  
Michael Eichinger
Keyword(s):  
Power Generation ◽  
Renewable Energy ◽  
Renewable Energy Sources ◽  
Cost Optimization ◽  
Energy Sources ◽  
Electricity Supply ◽  
Total System ◽  
Renewable Electricity ◽  
Capital Costs ◽  
Generation Costs

A 100% renewable electricity supply is no insurmountable technical problem anymore after the respective technologies to harvest the energy from multiple renewable energy sources have been developed and have reached a high level of maturity. A problem may rather be suspected to reside on the economic side of an exclusively renewable electricity supply. The present study examines the economic implications of a renewable energy scenario for the Java-Bali grid. Based on given energy supply scenarios, the costs of an electricity supply from renewable energy sources alone are determined. Economic optimum configurations are determined for which the annual system costs and accordingly the power generation costs are minimized. First the system running costs are considered, i.e. the operation and maintenance costs as well as the costs of the continuous renovation of system components, while capital costs are not taken into account. After this the capital costs are taken into consideration, and total system costs and power generation costs are determined. The main result is a specification of economic optimum system configurations. One important result is that a future electricity supply from renewable resources alone is not more expensive than the current power generation in developed countries. Another result is that the integration of special long-term storage into the Java-Bali grid, like for instance methane storages, besides pumped storages and batteries, is not economically favourable if further moderate battery cost reductions are reached.Article History: Received May 18th 2018; Received in revised form August 16th 2018; Accepted October 1st 2018; Available onlineHow to Cite This Article: Günther, M., Eichinger, M., (2018) Cost Optimization for the 100% Renewable Electricity Scenario for the Java-Bali Grid, International Journal of Renewable Energi Development, 7(3), 269-276.https://doi.org/10.14710/ijred.7.3.269-276

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