Contents 12 14 16 23
Front cover: Manufacturing of HA gas
turbines at GE Vernova’s Greenville factory, South Carolina, USA. See p46. Photo: GE Vernova
8
Update
It’s complicated: investigating the root causes of the Iberian blackout
The Expert Panel set up by ENTSO-E to unravel the factors leading to the 28 April Iberian blackout provides an update on its findings to date
12 Regulars
04 World news 42 Contacts
Turbine technology 12 From air to algorithm: why filtration is critical for data centre performance
Data centres need energy, lots of it, but they also need rock-solid reliability. The right design choices for gas turbine intake filtration are critical
14 Steam turbine failure trends An insurer’s perspective
Volume 45 | Number 6
Read the latest industry news and updated revised listings of upcoming projects and tenders, sample our definitive energy events listing, delve into the Modern Power Systems archive – and much more besides.
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16 Dealing with steam turbine blade failures in ageing plants One of the worst case maintenance scenarios for an aged steam turbine is the loss of blades during peak power demand — a scenario that occurred at Genesis Energy’s fossil-fired Huntly power station in NZ
© 2025 Business Trade Media International ISSN 0260-7840
23 Foam cleaning of steam and gas turbines: well established in the USA, rare in Europe Deposits on power plant turbine blades lead to deterioration in efficiency and loss of performance. A range of causes may be responsible for their formation. Such deposits can be removed in various ways. The most common methods are mechanical removal by blasting, water wash, wet steam washing and foam cleaning. Almost unknown in Europe, foam cleaning has been successfully applied in power plants in the United States for over 40 years. This article compares the different methods for scale removal
33 The last mile will be thermal – a Mitsubishi perspective Why gas turbines equipped with carbon capture and storage will power the net-zero transition
36 Ansaldo Energia upgrade packages boost fuel and operational flexibility The growing share of renewable energy and evolving environmental regulations are driving the need for gas-fired power plants to be more flexible. Ansaldo Energia has developed upgrade packages for the AE/V94.3A and SGT5-4000F gas turbine fleet, enabling faster ramp rates, reduced minimum environmental load (MEL) and enhanced fuel flexibility, including operation on hydrogen blends up to 40%, as well as HVO and diesel oil
41 Exergy’s HSAT increases efficiency and lowers costs Exergy has developed a new high-speed axial turbine (HSAT) that can enhance the efficiency and competitiveness of organic-Rankine-cycle based waste heat recovery plants
45 Ammonia as GT fuel: from initial studies to practical implementation
45 Aeroderivatives take off for Crusoe data centres
46 7HA.03 powers coal-to-gas transition in Taiwan
48
Turbine Technology Directory 2025 48 Gas turbines
Main data for OEM gas turbines rated above 1MW 56 Steam turbines
Main data for OEM steam turbine units
60 Gas turbine generator packages Main data for leading packaged turbosets
64 Combined cycle generation packages Main data for combined cycle packages 67 Company data
Turbine technology & services: suppliers listing
www.modernpowersystems.com | July/August 2025 | 3
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