Optimal performance for
Thu Duc III Water Plant
SINAMICS PERFECT HARMONY GH180 &
SIMOTICS HV Series H-compact PLUS
siemens.com/drives
Project
Saigon Clean Water Business and Investment Joint Stock Company (SWIC) aimed
to increase its water supply to about 600,000 households of Ho Chi Minh City
in Vietnam. Even though it appears that the country has abundant surface and
ground water resources, it has been experiencing water shortages. The factors
vary from uneven distribution of rainfall, pollution, poor service quality, to lack
of physical infrastructure and financial capacity to ensure water supply. The government has been tackling these water resources management issues by implementing policies and programs with regard to this. Therefore the plant has been
progressively modified over the years with its capacity being gradually increased.
Challenge
The Thu Duc III Water Plant, located in Linh Trung Ward in Thu Duc District, was
inaugurated with the aim of increasing its clean water supply to 600,000 local
households. This is equivalent to a supply requirement capacity of 300,000 m³
a day. The challenge was to pump several tons of river water from the Dong Nai
River to the Thu Duc Water Plant and pump it out as high quality purified water
to the regions’ inhabitants. This new facility required a reliable and powerful drive train that will maneuver the water in and out of the facility with less
downtime, since the city is highly dependent from its water supply. In addition,
it required a flexible drives system that will adjust based on every households’
supply requirements. There are different fluctuations of water requirement in
every situation depending on each household. Due to its intricate requirements,
SWIC needed an integrated drive train with advanced technologies, which are
safe, cost and energy efficient as well as reliable. A quick return of investment,
availability of spare parts, local service and support was equally important.
Benefits
• Energy savings
• Reduction of downtime
• Quick investment amortization
• Availability of service
Siemens’ IDS for optimal performance
Solution
Siemens Vietnam together with Passavant Energy & Environment GmbH
(PE&E) offered Siemens’ Integrated
Drive System (IDS) to SWIC’s Thu Duc
III Water Plant. This was their first
project collaboration in Vietnam.
PE&E was responsible for engineering,
procurement and construction and Siemens supplied the drive products and
systems. Siemens’ IDS was selected because it fully met all technical requirements and offered a profile of technical competence, experience, high
quality products and great service. The
project was carried out with PE&E’s
patented Turbo-LME technology and
Siemens’ IDS according to SWIC’s specifications. Six drive systems, including
six SINAMICS PERFECT HARMONY
GH180 MV converters and six SIMOTICS HV Series H-compact PLUS motors
were delivered to pump the patented
Turbo-LME process. The motors are
powerfully engineered with highest
grade materials and technology to
ensure long-term and reliable operation. For example, the motor frame is
made of grey cast-iron for stability and
good vibration resistance. The SIMOT-
ICS HV Series H-compact PLUS motors
are controlled by SINAMICS PERFECT
HARMONY GH180 MV converters to
run with variable speed in order to
compensate the changing load. The
SINAMICS drives offer the required reliability in form of cell bypass function.
This allows the automatic isolation of
a defective area and keeps the drives
running in case of a power cell failure.
Siemens’ IDS is an intelligent system as
its speed and torque adjust to different working conditions when water
demand changes. Siemens guaranteed
that the drives are connected directly
and the engineers worked closely to
ensure everything was fitted. Staff
training for operations and monitoring
the system was regularly conducted
during the project. Siemens’ expert
team from Vietnam and Singapore
provided great support and guidance
on how to set the parameters and
operation of the variable frequency
drives. In this way it is now possible to
achieve optimal performance of the
water treatment plant. A performance
test proves this: even when the plant
is run at its full capacity, the IDS still
uses a little less energy than initially
calculated. The operation proves to
be smooth without any damage or
problems – the drives were started
from zero to a maximum of 17,000
m³/h even though the established
maximum accounts for only 14,000
m³/h. The motors installed have 96.4
% efficiency while control has 96 %
– compared to competitive products
efficiency levels are 2-3 % better.
Summary
PE&E, Siemens and SWIC have perfected a unique water-treatment
system, assuring the residents of Ho
Chi Minh City that every single water
drop is safe to use and crystal clear.
Where water pressure was weak and
no clean water was supplied before,
there is now a sufficient supply of
clean high purity drinking water.
Siemens’ IDS majorly contributed to
this development by ensuring optimal
performance of the water treatment
facility. For a job as tough as achieving
the optimal circulation of such a vast
flow of water, there is no substitute for
high-performance power delivery. The
long-term benefits of the IDS even enabled energy savings for the customer.
Siemens Ltd.
Process Industries and Drives Large Drives
5B Ton Duc Thang Street, District 1
Ho Chi Minh City, Vietnam
Email: [email protected]
Tel: +84-8-3825 1900
Fax: +84-8-3825 1580
Website: www.siemens.com.vn
Toll free hotline: 1800 588820