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 ft 2 – 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 Total = $4.94 Million

UTPA Electricity Expenses (%)

Maintenance Practices Preventive Maintenance Filter replacement Coil cleaning Chiller tube brushing Lubrication 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 Conservation Process water treatment Minimize scale & corrosion Other Water sprinklers - 75% 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) – $500k cost avoidance to date – In FY’13, expect to avoid 2 million kWh ($150k) – 2 to 4 year payback* Energy Efficient Fluorescent Light Fixture

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 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 Energy Efficient Boiler

Facility Renovations FacilityDescription ASFC, HSHW Auditoriums, H&PE1, PHYS, & UCCF Upgraded from constant speed air handlers to higher efficiency ones tied to VFD’s. Replaced constant speed mixing boxes with VAV. Graphics/Visual Arts and CESS Same upgrades as above, including parking lot lighting & irrigation systems for landscaping. Replaced 400 ton chiller with 250 ton frictionless. Parking Lot Lighting Replaced 250 HPS lamps with LED technology

New Construction FacilityDescription 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 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? Energy Efficient Chiller GO BRONCS! Variable Frequency Drive