Transcript Energy Conservation Commitee

UTPA
Energy
Conservation
Initiatives
Oscar Villarreal
Director, Facilities Management
David Ortega
Assistant Director, Energy Manager
Outline
• Background
• Energy infrastructure tools
• Utility costs
• Energy conservation categories
– Maintenance & operations
– Energy purchasing
– Facility renovations
– New construction
• FY13 and beyond
Background
• Academic/Research Institution
– 19,600 Students
– ~2,700 Faculty and staff
– 57 Buildings
– 2.4 Million ft2
– 230 Acres
• Infrastructure: District Cooling
– Five chillers (8000 ton capacity)
– Thermal tank (1.4 million gal.)
– System volume (1.6 million gal.)
Infrastructure: Administrative Tools
• iShop Procurement
– Enables procurement of material
and labor for energy conservation
and efficiency.
• TMA Work Order System
– Cradle to grave tracking of facility
assignments
– e.g. Energy losses due to
overcooling, overheating, & leaks
Infrastructure: Technical Tools
• Building Automation System
– Remote monitoring, controlling, &
scheduling of HVAC UTPA-wide.
– Saves energy & person-hours, including
overtime
• Utility Metering
– To measure and track consumption, cost, etc.
– Provided by utility and conducted in-house
DO
UTPA Utility Costs ($) FY 2012
Electricity
Water
($ 4,380,000)
($ 344,925)
7%
89%
4%
Natural Gas
($214,813)
Total = $4.94 Million
UTPA Electricity Expenses (%)
End Users
(14%)
Building
Equipment
(54%)
Thermal
Energy Plant
(32%)
Maintenance Practices
Preventive
Maintenance
• Filter replacement
• Coil cleaning
Repair
• Water & air leaks
Replace
• 1250 ton chiller#3 (1985) with new 2000 ton
• Mixing boxes with VAV’s
Reuse/
Recycle
• Metals, lubricants, building materials, cardboard,
paper, etc.
Water
• Process water treatment
Conservation
Other
• Water sprinklers - 75%
• Chiller tube brushing
• Lubrication
• Minimize scale
& corrosion
• Infrared imaging
UTPA Lighting Upgrades
• 19 buildings; 4 phases from Fy’10-13
• Retrofits included more energy efficient
fluorescent tubes and electronic ballasts
• Results
– Increased illumination
– Higher energy efficiency
– Utility rebates ($158k)
Energy Efficient Fluorescent
Light Fixture
– $500k cost avoidance to date
– In FY’13, expect to avoid 2 million kWh ($150k)
– 2 to 4 year payback*
Operating Practices
District Cooling
• Produce chilled water at the proper conditions
• Deliver it to campus air handlers as necessary
to support the university’s mission.
Campus HVAC
Equipment
• Set back operating parameters when not required
e.g. increase space temperatures, ramp down
VFD’s, modulate valves, etc.
HVAC
Scheduling
• Utilize BAS to schedule UTPA facilities based on
university event scheduling software.
• Capitalize on unoccupied mode, after-hours,
week-ends, and holidays.
Other
• Turn off electrical equip/lighting when not in use.
• Demand response
Purchasing Practices
• Utility Contracts
– Electricity & natural gas
– Seek reliable supply of energy
– Competitive procurement
Energy Efficient Boiler
• Include energy conservation and improved
energy efficiency as procurement options
– HVAC equipment
– Dual technology motion sensors, dimmers,
programmable lighting controls
– electric and hybrid vehicles
OV
Facility Renovations
Facility
ASFC, HSHW
Auditoriums,
H&PE1, PHYS,
& UCCF
Graphics/Visual
Arts and CESS
Parking Lot
Lighting
Description
• Upgraded from constant speed air handlers to
higher efficiency ones tied to VFD’s.
• Replaced constant speed mixing boxes with VAV.
• Same upgrades as above, including parking lot
lighting & irrigation systems for landscaping.
• Replaced 400 ton chiller with 250 ton frictionless.
• Replaced 250 HPS lamps with LED technology
New Construction
Facility
Description
Performing Arts
Center
• Replacing 1969 facility with one that utilizes
modern-day technology and ADA compliance
Academic &
Administrative
Annex Addition
• Energy standards (e.g. energy savings light
fixtures now incorporated into all lighting
projects)
Parking Lot
Lighting
• New 334 car parking lot to have 63 LED fixtures
FY13 and Beyond
• Continuous improvement
• Continuous commissioning
– Why?
Building Automation System Console
Continuous Commissioning
• Continuous Commissioning is an ongoing process to:
– Resolve operating problems
– Improve comfort
– Optimize energy use, and
– Identify retrofits
• Optimizes performance for
the way the building is
currently being used.
Some items we hope to address
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Sensor calibration
Overrides
Malfunctioning valves
Optimization of boiler & chiller sequencing
Optimization of start/stop
Correct damper and valve problems
Optimization of cold-deck reset, duct static reset,
HW supply temp, terminal box minimum flow
• Optimization of schedules
• Optimization of chiller sequencing
• Optimization of CHW pump control
Questions?
Variable Frequency Drive
GO BRONCS!
Energy Efficient Chiller