0

Full Content is available to subscribers

Subscribe/Learn More  >

Biomass Boundary Layer Turbine Power System

[+] Author Affiliations
Nikhil Patel, Darren D. Schmidt

University of North Dakota, Grand Forks, ND

Paper No. IJPGC2002-26035, pp. 931-934; 4 pages
doi:10.1115/IJPGC2002-26035
From:
  • 2002 International Joint Power Generation Conference
  • 2002 International Joint Power Generation Conference
  • Scottsdale, Arizona, USA, June 24–26, 2002
  • Conference Sponsors: Power Division
  • ISBN: 0-7918-3617-7 | eISBN: 0-7918-3601-0
  • Copyright © 2002 by ASME

abstract

A “Boundary Layer Turbine” (BLT), with a specially designed multiple-disk rotor consisting of a number of closely packed parallel disks fixed to the shaft, was used to demonstrate direct conversion of biomass for small-scale distributed power generation. The turbine operates under the effect of skin friction drag exerted on the parallel plates, resulting from the flow of hot gases between the parallel plates. This concept is well known for its resistance to erosion when pumping viscous fluids, and the technology has been developed for commercial pump applications but not for a turbine. The turbine based on this concept is capable of encountering particle-laden gas and can accept ash-containing biomass fuels. In the present experiments, wood-derived sawdust (particle size ∼1 mm) and natural oats were fired separately as the test fuels. These fuels were injected directly into the stream of vitiated hot air downstream of the combustor. The location of injection was based on a 1- to 3-second residence time for complete combustion. This paper discusses a performance study and assessment of deposition, erosion, and corrosion (DEC) effects on the working components of the BLT. The potential for cost-effective electricity production from biomass in distributed-generation applications is also explored. The BLT was operated for 40 hours, consuming 68 kg of biomass fuel. The testing included initial firing of 10% biomass (by heating value), increasing to 100%. Documented performance shows isentropic turbine efficiencies of 11% at 3.2 kW and 6284 rpm. Turbine inlet conditions averaged 2.8 bar and 645 K. Over the course of testing, no significant component degradation was observed. The hot components were coated with a small amount of soot, but no deposits were formed that would lead to plugging or buildup in the turbine housing. The results of the study represent the first step toward development of a biomass BLT. It has been demonstrated that no significant barriers should hamper the use of biomass fuels in the rotor; however, isentropic efficiencies will have to be improved to at least 50% to achieve meaningful overall cycle efficiency.

Copyright © 2002 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In