Challenge The aging chiller plant at Monongahela Valley Hospital, installed in the 1970s, was nearing the end of its useful life. With the hospital running 24/7, and the nature of its work, facility managers knew it was critical that the chiller plant be upgraded quickly. The chiller plant upgrade and integration of the control systems would need to be performed while MVH continued to use the existing equipment, in order to adhere to the hospital’s zero cooling system downtime requirements. In addition to keeping its patients and staff comfortable, the hospital set a goal to lower energy costs. Solution Monongahela Valley Hospital called on the expertise of Trane to provide a complete turnkey solution to meet the challenges of its chiller plant replacement. Modular design speeds installation To save installation time, a packaged pre-built modular chiller plant was delivered to the site in three sections and assembled within a new pre-piped and pre-wired enclosure. Designed to fit in the tight space requirements outlined by the hospital, the compact chiller plant was placed on a concrete pad in a small area outside the building. A steel structure was built above the new plant enclosure to hold the two cooling towers. Monongahela Valley Hospital Turnkey solution meets zero downtime requirements, exceeds expectations Monongahela, PA Monongahela Valley Hospital (MVH) is a 280,000 sq ft, 226-bed, full-service health care facility with 1,100 employees, including a 220-member medical staff representing more than forty specialties. In addition to the plethora of services offered, MVH offers resources and support to the community. The 100-year-old hospital strives to provide the highest quality care to its patients, as well as comfort and convenience to family members and friends. New chillers improve efficiency, reliability Two 400-ton high-efficiency Trane CenTraVac™ centrifugal chillers were installed. The robust design of the Trane CenTraVac centrifugal chiller, with only one moving part, makes it one of the most reliable in the industry and the right choice to meet the hospital’s zero cooling system downtime criteria. The CenTraVac chiller requires less refrigerant to operate and its semi-hermetic motor design, along with low-pressure refrigerant, reduces refrigerant leaks, assuring a clean, cool operation for maximum performance. The quiet, vibration-free operation of the chiller also helps the hospital maintain a restful environment for its patients. A packaged pre-built modular chiller plant installed at MVH includes two 400-ton high-efficiency Trane CenTraVac centrifugal chillers. August 2013 Case study
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ChallengeThe aging chiller plant at Monongahela Valley Hospital,
installed in the 1970s, was nearing the end of its useful life.
With the hospital running 24/7, and the nature of its work,
facility managers knew it was critical that the chiller plant be
upgraded quickly. The chiller plant upgrade and integration
of the control systems would need to be performed while
MVH continued to use the existing equipment, in order to
adhere to the hospital’s zero cooling system downtime
requirements. In addition to keeping its patients and staff
comfortable, the hospital set a goal to lower energy costs.
SolutionMonongahela Valley Hospital called on the expertise of Trane
to provide a complete turnkey solution to meet the
challenges of its chiller plant replacement.
Modular design speeds installation
To save installation time, a packaged pre-built modular chiller
plant was delivered to the site in three sections and
assembled within a new pre-piped and pre-wired enclosure.
Designed to fit in the tight space requirements outlined by
the hospital, the compact chiller plant was placed on a
concrete pad in a small area outside the building. A steel
structure was built above the new plant enclosure to hold the
two cooling towers.
Monongahela Valley HospitalTurnkey solution meets zero downtime requirements, exceeds expectationsMonongahela, PA
Monongahela Valley Hospital (MVH) is a 280,000 sq ft, 226-bed, full-service health care facility with 1,100employees, including a 220-member medical staff representing more than forty specialties. In addition to theplethora of services offered, MVH offers resources and support to the community. The 100-year-old hospital strivesto provide the highest quality care to its patients, as well as comfort and convenience to family members and friends.
New chillers improve efficiency, reliability
Two 400-ton high-efficiency Trane CenTraVac™ centrifugal
chillers were installed. The robust design of the Trane
CenTraVac centrifugal chiller, with only one moving part,
makes it one of the most reliable in the industry and the right
choice to meet the hospital’s zero cooling system downtime
criteria. The CenTraVac chiller requires less refrigerant to
operate and its semi-hermetic motor design, along with
low-pressure refrigerant, reduces refrigerant leaks, assuring a
clean, cool operation for maximum performance. The quiet,
vibration-free operation of the chiller also helps the hospital
maintain a restful environment for its patients.
A packaged pre-built modular chiller plant installed at MVH includes two
The chiller plant includes an energy-saving heat exchanger to
allow free cooling in cooler months, and variable frequency
drives (VFDs) on the CenTraVac chiller, the chilled water and
condenser water pumps, and the cooling tower fans. The
VFDs reduce energy usage, extend motor life and help to
maximize the comfort of patients and staff.
Control system allows easy monitoring
A Trane Tracer™ SC control system automates the chiller
plant and integrates fully through BACnet® with the existing
third party vendor’s HVAC controls system already used by
the hospital. The web-based controller with graphics provides
an easy-to-use interface via the web to monitor and control
the chiller plant from any location. The management tool
helps improve efficiencies, reduce energy costs and increase
comfort. Facility managers use the Tracer SC to optimize
energy efficiency with chiller sequencing routines, coordinate
the pump and cooling tower to reduce costs, and use
diagnostic messages for troubleshooting.
TIS ensures fast issue resolution
A Trane service contract ensures the peak performance of the
equipment and reduces service costs with a regular
maintenance plan versus emergency service calls. Trane®
Intelligent Services (TIS) Active Monitoring provides
peace-of-mind to building managers with constant
monitoring of systems, alarm notification, diagnostics and
analysis by Trane technical specialists. Continually collecting
and interpreting data from the building equipment and
controls, TIS allows responsive action should an issue arise.
ResultsMonongahela Valley Hospital replaced its aging chiller with a
new Trane high efficiency chilled water plant, which includes
two Trane 400-ton CenTraVac™ chillers, a free cooling heat
exchanger, and VFDs on the chillers, water pumps and
cooling tower fans. A new Trane Tracer SC controller was
integrated into the existing control system for easy
monitoring of the fully-automated chiller plant. The
upgrades, which were completed without disruption to
hospital operations, are reducing energy and maintenance
costs, increasing efficiencies and helping to ensure a
comfortable indoor environment for patients and staff.
“The efficiency of the chilled water plant has exceeded our
expectations,” said William Burnett, director of engineering
and maintenance, Monongahela Valley Hospital. “The second
chiller was not even needed during our July heat wave.”
A Trane Tracer SC controller was integrated with existing controls
without a single moment of downtime.
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