exhaust stack discharge velocity reduction
DESCRIPTION
Higher Education Sustainability Conference - Best Practices Award - UCI ESDVR 06.22.10TRANSCRIPT
2010 Higher 2010 Higher Education Education
Sustainability Sustainability ConferenceConferenceLos Angeles Trade Tech CollegeLos Angeles Trade Tech College
June 22, 2010June 22, 2010Chris AbbamontoChris Abbamonto
UC Irvine, Facilities ManagementUC Irvine, Facilities Management
The University of California, Office of the President is a Registered Provider with The American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-AIA members are available on request.
This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
Learning ObjectivesLearning Objectives1. You will identify the criteria that exemplify new
construction best practices in HVAC design and retrofitting.
2. The learner will identify the technologies useful for HVAC efficiency including indirect/direct evaporative cooling, a heat pipe heat recovery loop to dehumidify air in high-density areas, solar thermal installations, and the modification of exhaust stack height and discharge velocity.
3. You will compare and contrast the range of strategies and technologies to energy savings.
AgendaAgenda
UC Irvine Campus OverviewUC Irvine Campus Overview Smart Lab Overview Smart Lab Overview Exhaust System OptimizationExhaust System Optimization Questions and DiscussionQuestions and Discussion
University of California, University of California, IrvineIrvine
Large research universityLarge research university$16M annual utilities budget$16M annual utilities budget
Lab buildings consume 2/3 of campus energyLab buildings consume 2/3 of campus energyMany energy initiatives to reduce carbon Many energy initiatives to reduce carbon
footprintfootprint
Campus Energy SavingsCampus Energy SavingsTeam SynergyTeam Synergy
SafetyManagement
Visionary & Supportive
UpperManagement
Engineers
FacilityManagers
Patience
Supportive Users/Researchers
AgendaAgenda
UC Irvine Campus OverviewUC Irvine Campus Overview Smart Lab Overview Smart Lab Overview Exhaust System OptimizationExhaust System Optimization Questions and DiscussionQuestions and Discussion
Balancing Lab Balancing Lab Safety & Safety &
Climate SafetyClimate Safety Create lab buildings that out perform
ASHRAE 90.1 / CA Title 24 by 50%
Combine energy initiatives such as Centralized demand controlled
ventilation (CDCV) Low flow (high performance) fume hoods Energy-efficient lighting Optimized Exhaust Systems
Building Exhaust System
Labs w/CDCVreal time lab air monitoring4 ach occupied2 ach unoccupied
Energy efficientlighting
Labs with low flow fume hoods(as appropriate)
Smart Lab Building Smart Lab Building ConceptConcept
Sash
AirfoilWork
Surface
Exhaust Plenum
Baffle
Increased Hood Depth
Operate safely at lower face velocities (i.e. 70 FPM rather than 100 FPM)
Low Flow (high performance) Low Flow (high performance) Fume HoodsFume Hoods
Lab Area LPD from 1.1 to 0.6
Lab Prep LPD from 1.0 to 0.4
Prep Room LPD from 2.0 to 1.0
Corridor LPD from 0.6 to 0.3
Lighting Controls Lighting Controls Reduce Power Density by Reduce Power Density by
50%50%
Slightly higher stacks, 4-5 feet
Variable speed fans (reduce exhaust fan flows)Install wind responsive equipment (if needed)
Reduce or eliminate bypass air
Exhaust Energy Reduction Exhaust Energy Reduction SolutionsSolutions
Estimated annual energy savings:• 890,080 kWh electrical with 193 kW demand
reduction• 22,464 therms of natural gas
Estimated annual energy cost savings:• $110,980 at $0.105/kWh and $0.78/therm
Savings by Design payment of $397,836 Exceeding Title 24 by 50%
Bid as a LEED New Construction (NC) Silver Design Build contractor proposed to increase the sustainable features to achieve LEED NC
Gold certification
AgendaAgenda
UC Irvine Campus OverviewUC Irvine Campus Overview Smart Lab Overview Smart Lab Overview Exhaust System OptimizationExhaust System Optimization Questions and DiscussionQuestions and Discussion
Lab Building ExhaustLab Building Exhaust
Wind
Exhaust Fan Bypass Damper
Plenum
Fume Hood
Supply Fan Duct
Balcony
Re-Entrainment of Contaminated Air
Wind Tunnel TestingWind Tunnel TestingChallenge Conservative Challenge Conservative
AssumptionsAssumptions
Wind Tunnel TestingWind Tunnel Testing Build model of campusBuild model of campus Install model stacksInstall model stacks An abundance of air An abundance of air
sampling point sampling point receptorsreceptors
Wind Tunnel Testing Wind Tunnel Testing MethodologyMethodology
Build model of campusBuild model of campus Install model stacksInstall model stacks Install air sampling points Install air sampling points
(“receptors”)(“receptors”) Ensure correct approach Ensure correct approach
flowflow Wind tunnel testingWind tunnel testing
Sprague HallSprague Hall Install variable Install variable
frequency drives frequency drives (VFD)(VFD)
Close bypass dampersClose bypass dampers No stack extension No stack extension
neededneeded Energy Savings:Energy Savings:
582,000 kWh582,000 kWh Cost: $197,000Cost: $197,000 Simple Payback: 0.9 Simple Payback: 0.9
yearsyears
Croul HallCroul Hall
Install variable Install variable frequency drives frequency drives (VFD)(VFD)
8’ Stack Extensions8’ Stack Extensions Static Pressure ResetStatic Pressure Reset Energy Savings: Energy Savings:
344,000 kWh344,000 kWh Cost: $307,000Cost: $307,000 Simple Payback: 6.2 Simple Payback: 6.2
yearsyears
Natural Sciences IINatural Sciences II
Install variable Install variable frequency drives frequency drives (VFD)(VFD)
Static Pressure ResetStatic Pressure Reset 4’ Stack Extensions4’ Stack Extensions Energy Savings: Energy Savings:
929,000 kWh929,000 kWh Cost: $331,000Cost: $331,000 Simple Payback: 1.1 Simple Payback: 1.1
yearsyears
Hewitt HallHewitt Hall
No Stack ExtensionsNo Stack Extensions Install variable Install variable
frequency drives frequency drives (VFD)(VFD)
Static Pressure ResetStatic Pressure Reset Energy Savings:Energy Savings:
287,000 kWh287,000 kWh Cost: $365,000Cost: $365,000 Simple Payback: 9.8 Simple Payback: 9.8
yearsyears
Summary of SavingsSummary of Savings
Incentive NetElectrical Savings
Simple Payback
Building kWh Savings $ 0.24 Project Cost $ 0.105 Years
Sprague Hall 582,000 139,680 $ 57,320 $ 61,110 0.9
Croul Hall 344,000 82,560 $ 224,440 $ 36,120 6.2
Natural Sciences 2 929,000 222,960 $ 108,040 $ 97,545 1.1
Hewitt Hall 287,000 68,880 $ 296,120 $ 30,135 9.8
TOTALS: 2,142,000 514,080 $ 171,840 $ 224,910 0.8
Keys to SuccessKeys to Success
Next StepsNext Steps Wind Responsive ControlsWind Responsive Controls Evaluation of Additional FacilitiesEvaluation of Additional Facilities
Professional Risk AssessmentProfessional Risk Assessment Challenging Engineering Rules of ThumbChallenging Engineering Rules of Thumb Collaborative Cross Functional TeamCollaborative Cross Functional Team Commitment of Resources to Energy EfficiencyCommitment of Resources to Energy Efficiency
This concludes The American Institute of Architects Continuing Education Systems Program