UCI Comprehensive Retrofits 10.29.09

Local Government Commission

Comprehensive Energy Efficiency Retrofit Projects

Chris AbbamontoCampus Energy Manager

October 29, 2009

Comprehensive Retrofits• A “deep energy-efficiency project” is one that achieves a

reduction in energy of 50 percent or greater• Colleges and universities have massive energy loads

that will not be significantly reduced by the aggregation of small-scale projects

• Energy retrofit projects offer the most feasible, immediate opportunity to make progress in reducing an institution’s utility consumption are a prerequisite to renewable energy projects

• In fact, until renewables’ price/performance ratios improve, retrofits may provide the only opportunity to take significant bites out of the carbon footprint.

• We have moved beyond the “quick fix” projects of installing occupancy-sensors, replacing motors, wavelength selective window film, and retrofitting lamps and ballasts

• Energy-retrofit projects in updated buildings that achieve a 50% cut in carbon emissions will not realize 2-4 year paybacks that may have been typical of ‘90s projects

• Deep energy-efficiency projects are more comprehensive, changing fundamental, systemic design features rather than merely upgrading discrete components

• Thus, deep energy-efficiency projects may have 7-10 year paybacks; however, they can often attain 50% or even greater carbon emissions savings

Comprehensive Retrofits

• Redesign and retrofit of office lighting using the task ambient lighting with occupancy sensing

• Redesign and retrofit of classroom lighting using smart control schemes in conjunction with updated fixtures

• Redesign and retrofit of laboratory lighting using simplified daylighting and occupancy controls

• Parking and roadway retrofit using bi-level (occupancy-sensing) induction or LED lamps and daylight sensors

• Installation of stairwell and exitway bi-level fluorescent and LED fixtures

Deep Energy Efficiency: Lighting

Deep Energy Efficiency: Labs• Retrofit UC Irvine “smart lab” energy features, including

demand controlled ventilation, ventilation setback when no occupancy is sensed, optimized VAV exhaust velocity and stack height, and other features as feasible to retrofit.

• Elimination of bypass air and reduction of excessive exhaust discharge velocity through the installation of VFD’s on exhaust fans and stack extensions as necessary – also include static pressure reset

• Low flow (High-Performance) fume hoods in fume hood driven labs

• CAV to VAV retrofit in laboratories and vivaria

Smart Laboratory ConceptBalancing Laboratory Safety and Climate Safety

Create lab buildings that out perform ASHRAE 90.1 / CA Title 24 by 40-50%. Combine energy initiatives such as centralized demand controlled ventilation (CDCV), low flow (high performance) fume hoods, reduced building exhaust stack airspeeds, and use of energy-efficient lighting.

Building Exhaust System

Labs w/CDCVreal time lab air monitoring4 ach occupied2 ach unoccupied

Energy efficientlighting

Labs with low flow fume hoods(as appropriate)

Centralized Demand Controlled Ventilation (CDCV)Utilizing real time lab air monitoring, reduce air changes in labs from approximately 6 ACH to 4 ACH while the lab is occupied and 2 ACH when lab is unoccupied.

Low Flow (High Performance) Fume HoodsUtilize fume hoods that are designed to operate safely at lower face velocities, i.e., 70 FPM rather than 100 FPM.

Exhaust plenum

Deeper work surface

Unique airfoil design

Advanced baffle design

Lab Area LPD from 1.1 to 0.55

Lab Prep LPD from 0.9 to 0.36

Prep Room LPD from 2.0 to 1.0

Corridor LPD from 0.6 to 0.3

Laboratory Lighting ControlsReduce Power Density by 50%

- Daylight sensors for fixtures near windows- Occupancy sensing by lab bay

Lab Building Exhaust Fan Energy Reduction

Building Exhaust System

Slightly higher stacks

Variable speed fans (wind responsive if necessary)

Air handler with fresh air intake

Comprehensive Energy Efficiency Retrofit Projects

Chris AbbamontoCampus Energy Manager

October 29, 2009