Variable Speed Drives can save Billions of Dollars in meeting 316B – Hot Topic
Hour September 11
The Hot Topic Webinar on power plant pumps had benefits which were both general
and specific. The format of the webinars is flexible to allow for introduction
of important new subjects. The one which was introduced for this session
was the ability of variable speed drives to potentially save power companies
billions of dollars. There is evidence that power plants can use this technology
and avoid installing cooling towers to meet the 316B water intake rules.
Starting with the general benefits,
Randal Ferman of EKWESTREL
discussed the purpose of identifying “minimum flow.”
The main purposes of minimum flow are to establish
The minimum flow has to take into account a number of pump phenomena.
William Livoti
of WEB recommended that power
plants assess their pump requirements and consider variable speed drives to
reduce energy consumption. He cited the advantages when handling off peak loads.
A specific example was given for the VFD saving with cooling water makeup pumps.
The number of pumps and potential savings is substantial.
Jason Hoover
of Siemens was able to cite
very detailed analyses which show that variable speed drives can be used with
once through cooling systems to meet the requirements of 316B. This regulation
is designed to prevent fish kill and is based on requiring minimal entrainment
of fish and harm to fish which are temporarily entrained. Jason showed that the
use of variable speed drives reduces the entrainment and harm by over 80
percent. There are many nuances to the rules and flexibility in the way they can
be treated by the individual states. So the extensive work done by Siemens
will be valuable to the plants seeking to obtain compliance
Bob McIlvaine provided an overview of the pump coverage in
Power Plant Systems and Components
and
Gas Turbine and Combined Cycle Decisions. Coverage
includes basic design considerations as well specifics such as the 316B
requirements. Each process option will be evaluated. For example, the conversion
of coal-fired power plants to burn natural gas introduces a new challenge. How
do you marry the existing water systems with the new gas turbine?
Sargent
& Lundy has published several papers addressing solutions for specific
plants. These are included in the Systems.
The individual presentations follow:
Power Plant Pumps Webinar - Hot Topic
Hour September 11, 2014
For power plant pumps, discussion was the ability of variable speed drives to
potentially save power companies billions of dollars. There is evidence that
power plants can use this technology and avoid installing cooling towers to meet
the 316B water intake rules.
Revision Date:
9/11/2014
Tags:
221112 - Fossil Fuel
化石燃料,
221112 - Fossil Fuel
化石燃料,
WEG, Ekwestrel, McIlvaine, Pump
Bob McIlvaine provided an overview of the pump coverage in Power Plant Systems
and Components and Gas Turbine and Combined Cycle Decisions. Coverage includes
basic design considerations as well specifics such as the 316B requirements.
Revision Date:
9/11/2014
Tags:
221112 - Fossil Fuel
化石燃料,
221112 - Fossil Fuel
化石燃料,
McIlvaine, Pump
William Livoti of WEB recommended that power plants assess their pump
requirements and consider variable speed drives to reduce energy consumption. He
cited the advantages when handling off peak loads. A specific example was given
for the VFD saving with cooling water makeup pumps. The number of pumps and
potential savings is substantial.
Revision Date:
9/11/2014
Tags:
221112 - Fossil Fuel
化石燃料,
221112 - Fossil Fuel
化石燃料,
WEG, Pump
Purpose of Minimum Flow by Randal
Ferman, EKWESTREL - Hot Topic Hour September 11, 2014
Randal Ferman of EKWESTREL discussed the purpose of identifying “minimum flow.”
§
The lowest continuous flow the pump is permitted to operate
§
Without reference to a specific vibration limit or other criteria
§
The ‘default’ pump manufacturer’s recommendation The main purposes of minimum
flow are to establish
§
Permissible vibration
§
Impeller cavitation erosion life
§
Radial bearing loading, shaft bending
§
Temperature rise The minimum flow has to take into account a number of pump
phenomena.
Revision Date:
9/11/2014
Tags:
221112 - Fossil Fuel
化石燃料,
221112 - Fossil Fuel
化石燃料,
Ekwestrel, Pump
“Monitoring for
Gas Turbine Combined Cycle Power Plants” - Hot Topic Webinar on September 18 at
10 a.m. Central
This webinar will be both organizational and informative. It is all part of a
whole knowledge system for gas turbine combined cycle plant operators -
Gas Turbine and Combined Cycle Decisions. The
free website and periodic webinars empower the operators to buy the best
products rather than the most familiar or least expensive.
The webinar on the 18th will try to answer the question: What are
the most important and difficult decisions you will have to make regarding air
and water monitoring equipment and services?
Panelists for Water Monitoring for Combined Cycle
Power Plants on Sept. 18, 2014:
Kai D. Rondum,
Product Manager for Boiler Water Treatment at
Ashland Water Technologies
Joe Zimmerman,
Director of Marketing at Chemtrac
Systems, Inc.
Ken Kuruc,
Manager of Industry Accounts, Fossil at
Hach Ultra Analytics
David M. Gray,
Senior Product Manager at Mettler-Toledo
Thornton, Inc.
On August 28 we conducted a webinar on
Degasification and Demineralization. One
of the discussions was “Critical
Measurements”
by Jean Holz of Hach. She
described which measurements were needed at each point in the boiler feedwater
and condensate return system. When asked about optical vs. electrochemical
choices, she replied that the range of choices depend on the point at which you
are measuring and whether you need to measure a few ppb or some higher number.
She observed that dissolved oxygen is measured in three accepted methods:
Winkler Titration, Clark Cell Electrodes and Luminescence-based Optodes.
LDO has proven to be the best choice except where you need to measure at very
low levels.
These are the types of pertinent questions that the operators want
answered. Others would be:
With fast start HRSGs and constant cycling what instrumentation solutions will
counter some of the negative consequences of this operating mode?
What are the water chemistry issues facing GTCC operators which are unique to
this type of power generation? Which require continuous measurement and which
can be measured periodically?
What are the monitoring needs if zero liquid discharge technology is mandated?
What other questions are GTCC operators asking?
This webinar is free for power plant owners and operators.
Click here to view schedule and register.