A SUPPLEMENT TO MECHANICAL ENGINEERING MAGAZINE
...Continued from page 51
Cooling flow monitoring along with properly calibrated plant
instrumentation allows for trending of engine firing temperature
and engine performance using fundamental thermodynamics.
Performance issues arising during engine operation can be accurately
assessed and plans for corrections can be made during scheduled
A quick way to determine if there are cooling issues in an engine
Neglecting to monitor cooling flows and engine health may lead
is to trend disc cavity temperature and bypass valve positions. If
the bypass valves are either fully open or fully closed that may lead
to engine undercooling or overcooling. If disc cavity temperatures
are under the limits that they are controlled to then the engine is
being overcooled; if they are over the limits then the engine is being
undercooled. The trends should be plotted for a range of ambient
conditions and engine load variations.
to underperforming engine, unnecessary forced outages or early
replacement of engine components.
1) Gas Turb simulates the most important gas turbine
configurations used for propulsion or for power generation.
Virtually all gas turbine performance simulation problems can
be solved with Gas Turb, http://www.gasturb.de/
*One measure of the efficiency of a gas turbine that converts a fuel into heat
and into electricity is the heat rate. To express the efficiency of a gas turbine as
a percentage, divide the equivalent Btu content of a kWh of electricity (which
is 3,412 Btu) by the heat rate. For example, if the heat rate is 10,140 Btu, the
efficiency is 34%. If the heat rate is 7,500 Btu, the efficiency is 45%.
A VIEW FROM THE CHAIR
By Dr. Seung Jin Song, Chair, ASME IGTI Board
GT India 2014 was held in New Delhi,
Welcome back to the Global Gas Turbine
News, the quarterly newsletter of the ASME
International Gas Turbine Institute (IGTI). In
this issue, I would like to update you on GT
India 2014, ORC 2015 and Turbo Expo 2015
as well as changes in Turbo Expo’s review
process and improved communication
between IGTI and editors of its journals.
India, December 15-17, 2014. 238 participants from 12 countries
registered for the conference, and 85 papers were presented.
Nicholas Cumpsty delivered the keynote address, and many other
IGTI members led workshops and delivered invited lectures. There
was also strong industry participation, including a panel session with
representatives from GE, Siemens, and MHI and an exhibit featuring
ANSYS and GE. I thank our Indian organizers and the corporate
sponsors - GE, ANSYS and QuEST.
The ORC Power Systems Committee of IGTI will organize the
Third International Seminar on ORC Power Systems, to be hosted
by the Ghent University and the University of Liege, in Brussels,
Belgium, October 12-14, 2015. The global ORC market is growing
rapidly, and IGTI aims to be at the forefront of this emerging field.
Further details can be found at http://www.asme-orc2015.be.
Of course, Turbo Expo remains the flagship conference for IGTI.
For the 60th Expo, to be held in Montreal on June 15-19, 2015, 1,170
papers are undergoing review process at the time of writing this
article. These numbers promise to be even larger than the previous
North American record set in San Antonio in 2013.
The key to the continued success of Turbo Expo is its review
process. By custom, the Review Chair interfaces directly with Session
Organizers to ensure timely and thorough reviews. With increased
volume, the existing system has become unmanageable. Therefore,
at the request of the IGTI Board, Howard Hodson has been working
with a group of volunteers to further improve the process. In
our new process, the objective is to “devolve responsibility and
incentivize the chain of command” by getting Technical Committee
Chairs and Vanguard Chairs more involved in the review process.
As in the past, the Review Chair will still oversee the entire review
process for Turbo Expo; however, the Technical Committee Chairs
and Vanguard Chairs will now oversee the review process within
their committees and tracks, respectively. These changes will be
tried out in the Turbomachinery Committee and Aircraft Engine
Committee for Turbo Expo 2015. If successful, such practice will be
recommended to all of the committees in the future.
Along with conference organization, journal publication
is the other core activity of IGTI. IGTI’s two journals are the
Journalof Engineeringfor Gas Turbinesand Power and Journalof
Turbomachinery; the editors of these journals volunteer countless
hours interfacing directly with authors. I would like to take this
opportunity to thank Dave Wisler and Ron Bunker for their selfless
service as editors.
To enhance communication between editors and the IGTI
community, the IGTI Board began to meet regularly with editors,
beginning in 2014. It is hoped that this change will enable IGTI
to better achieve its mission to promote the advancement of
technologies and knowledge about turbomachinery.
I look forward to seeing all of you at 60th Turbo Expo in