Sustainable Engineering in the Global Energy Sector

2015 ◽  
Vol 138 (2) ◽  
Author(s):  
Kaufui Vincent Wong

The current age is one in dire need of teaching engineers of all branches about sustainability. The principle is that engineering choices have to be decided in the framework of constraints related to energy and materials and decreasing wastes. The federal government would be the most appropriate entity to take actions to drive the burgeoning of sustainable energy technologies. Coal is the most popular fuel globally used with the Rankine cycle for electric power generation. Most of the electric power produced in the world is generated via the Rankine cycle. One of the most efficient simple thermodynamic cycles for electric power generation currently is the gas cycle using natural gas, with the additional potential to decouple the energy sector from the water sector. The combined gas and Rankine cycle is an even more efficient cycle to generate electric power, but then couples the energy sector again to the water sector. Carbon dioxide, the greenhouse gas with the longest half-life, is still produced with the gas turbine cycle, but to a lesser degree than the Rankine cycle using coal. The main components of the sustainability aspects of the energy sector are outlined. A number of themes related to sustainability in the energy sector are also presented.

1987 ◽  
Vol 5 (2) ◽  
pp. 157-167

Increasing electricity demand is accompanied by concerns about the availability and price of fossil fuels and about the environmental impacts of electric power generation. Emerging non-nuclear energy technologies and systems can offer several potential advantages to complement conventional sources of energy to meet future needs. The advantages of the alternative technologies, however, must be balanced against the inherent limitations associated with some of the technologies. The technologies using alternative energy sources have been under active development for the past decade, and require continued technology development to improve performance, economics, reliability, and environmental acceptability. The technologies closest to, or having reached, small-scale production status include small wind systems, dry-steam geothermal, and biomass processes. Fuel cells, grid-connected photovoltaics, solar thermal, water-dominated geothermal, advanced coal systems, and energy storage systems require more development before they can contribute effectively. The American Nuclear Society recognizes that many renewable and emerging energy technology systems can contribute to the overall reliability of the electric grid. That contribution is limited, however, by the location-specific nature of many sources and requires major technological development.


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