On “waste incineration and heat recovery”

1982 ◽  
Vol 1 (3) ◽  
pp. A7-A8
Author(s):  
Ronald M. Heck
Keyword(s):  
Heat Recovery ◽  
Waste Incineration

scholarly journals Numerical and Experimental Investigation of a Velocity Compounded Radial Re-Entry Turbine for Small-Scale Waste Heat Recovery

Energies ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 245
Author(s):  
Andreas P. Weiß ◽  
Dominik Stümpfl ◽  
Philipp Streit ◽  
Patrick Shoemaker ◽  
Thomas Hildebrandt
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Power Plants ◽  
Waste Heat ◽  
Thermal Power ◽  
Cost Effective ◽  
Waste Incineration ◽  
Small Scale ◽  
Thermal Power Plants ◽  
Geothermal Wells

The energy industry must change dramatically in order to reduce CO2-emissions and to slow down climate change. Germany, for example, decided to shut down all large nuclear (2022) and fossil thermal power plants by 2038. Power generation will then rely on fluctuating renewables such as wind power and solar. However, thermal power plants will still play a role with respect to waste incineration, biomass, exploitation of geothermal wells, concentrated solar power (CSP), power-to-heat-to-power plants (P2H2P), and of course waste heat recovery (WHR). While the multistage axial turbine has prevailed for the last hundred years in power plants of the several hundred MW class, this architecture is certainly not the appropriate solution for small-scale waste heat recovery below 1 MW or even below 100 kW. Simpler, cost-effective turbo generators are required. Therefore, the authors examine uncommon turbine architectures that are known per se but were abandoned when power plants grew due to their poor efficiency compared to the multistage axial machines. One of these concepts is the so-called Elektra turbine, a velocity compounded radial re-entry turbine. The paper describes the concept of the Elektra turbine in comparison to other turbine concepts, especially other velocity compounded turbines, such as the Curtis type. In the second part, the 1D design and 3D computational fluid dynamics (CFD) optimization of the 5 kW air turbine demonstrator is explained. Finally, experimentally determined efficiency characteristics of various early versions of the Elektra are presented, compared, and critically discussed regarding the originally defined design approach. The unsteady CFD calculation of the final Elektra version promised 49.4% total-to-static isentropic efficiency, whereas the experiments confirmed 44.5%.

The Economics of Energy Recovery From Industrial Waste Incineration

1979 ◽  
Vol 101 (4) ◽  
pp. 260-268 ◽  
Author(s):  
W. K. Lombard
Keyword(s):  
Industrial Waste ◽  
Energy Recovery ◽  
Capital Investment ◽  
Heat Recovery ◽  
Waste Incineration ◽  
Industrial Wastes ◽  
Operating Costs ◽  
Industrial Plant ◽  
Plant Manager ◽  
The Cost

The equipment technology to incinerate and in turn recover energy from industrial wastes is reasonably well documented via the manufacturers of the equipment involved. The difficult question for the industrial plant manager is whether the capital investment and operating costs are economically justified. This paper will review the styles of incineration and heat recovery systems which are typically applied to industrial wastes – solids, liquids, and gases – and then assess the quantity and type of waste materials which are needed to make the cost of installing that equipment economically justified.

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