0

Full Content is available to subscribers

Subscribe/Learn More  >

Applying Acoustic Pulse Reflectometry in a Geothermal Energy Plant: A Case Study

[+] Author Affiliations
Noam Amir, Daniel Bobrow, Tal Pechter

AcousticEye Ltd., Tel Aviv, Israel

Paper No. POWER2010-27207, pp. 431-434; 4 pages
doi:10.1115/POWER2010-27207
From:
  • ASME 2010 Power Conference
  • ASME 2010 Power Conference
  • Chicago, Illinois, USA, July 13–15, 2010
  • Conference Sponsors: Power Division
  • ISBN: 978-0-7918-4935-4 | eISBN: 978-0-7918-3876-1
  • Copyright © 2010 by ASME

abstract

One major type of heat exchanger in geothermal power-plants acts to condense an organic vapor driving the generating turbines. Routine inspection carried out at such a plant in the spring of 2008 detected several leaking tubes in one of the condensers. The condenser consists of 11 banks, each with 284 tubes. The tubes in this condenser are 1″ in diameter and 18m in length. A sample of tubes was investigated by a metallurgical laboratory which determined that the failure mechanism was corrosion. This was eventually traced to a faulty maintenance procedure which left water traces after pressure hydro testing. Several NDT methods were considered in order to screen the tubes for leaks, so the unit could be brought up to standard performance levels. Eventually AcousticEye’s APR equipment was selected, based on the very short cycle time it offered, which could dramatically shorten plant downtime. After an initial feasibility test of one of the tube banks, the remaining 2840 tubes were inspected in 2 days. Four percent of the tubes were found either leaking or deteriorated above a predefined maximum acceptable damage level (pinholes and tube wall thickness reduction) and plugged. Benefits were prevention of a continued loss of 70 Kg/day of organic fluid (which is not only wasteful but also infringes on environmental legislation) and an increase of 1.5% in plant performance. Based on this experience, the operator decided to adopt APR based inspection as a standard procedure in its plants.

Copyright © 2010 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