Wellhead scaling problems in geothermal power plants addressed using a needle valve derivative

Reynir S. Atlason, Runar Unnthorsson

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


One of the most frequent problems in geothermal power plants is scaling. If scaling is allowed to build in the wellhead it can hinder the flow from the well. In this study we investigate how exactly that problem was solved at HS Energy in Iceland. We look at the problem, describe it and how it has been successfully solved. The solution, a valve called the Elli valve, which can be regarded a derivative of the Giffard's injector, is then described. This valve has been shown to allow for a better flow control, less problems with regards to scaling removal and has economical advantages over other control valves. This solution should allow geothermal power plants dealing with scaling problems to use the presented solution to solve it effectively, in a cost efficient manner.

Original languageEnglish
Title of host publicationFuels and Combustion, Material Handling, Emissions; Steam Generators; Heat Exchangers and Cooling Systems; Turbines, Generators and Auxiliaries; Plant Operations and Maintenance; Reliability, Availability and Maintainability (RAM); Plant Systems, Structures, Components and Materials Issues
PublisherThe American Society of Mechanical Engineers(ASME)
ISBN (Electronic)9780791846087
Publication statusPublished - 2014
EventASME 2014 Power Conference, POWER 2014 - Baltimore, United States
Duration: 28 Jul 201431 Jul 2014

Publication series

NameAmerican Society of Mechanical Engineers, Power Division (Publication) POWER


ConferenceASME 2014 Power Conference, POWER 2014
Country/TerritoryUnited States

Bibliographical note

Publisher Copyright:
Copyright © 2014 by ASME.


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