Demand for Laboratory Ventilation - RPIC-IBIC€¦ · Safe, Dependable and Energy Efficient...
Transcript of Demand for Laboratory Ventilation - RPIC-IBIC€¦ · Safe, Dependable and Energy Efficient...
Safe, Dependable and Energy Efficient Laboratories 8-13
Demand for Laboratory Ventilation
• Operating Mode
• Min and Max Flow
• Temperature Control
• Dilution – ACH
• Air Change Effectiveness
• Room Pressure
• Transfer Volume
-+Room Pressure
Qt = Qe – Qs Qt = Constant
Qe - Exhaust
Safe, Dependable and Energy Efficient Laboratories 8-13
Emissions in Labs Requiring Dilution • Escape from Lab Hoods
• Improper Bench Top Procedures
• Unventilated Equipment
• Fugitive Emissions
– Chemical Bottles & Containers
– Gas Cylinders
• Accidental Spills
Typical Genera,on Rates
<0.1 lpm to 10 lpm
Catastrophic Failure of a Gas Cylinder
1400 lpm
Safe, Dependable and Energy Efficient Laboratories 8-13
Specifying Airflow Rates for Labs Air Change Rate (ACH)?
• Develop & Assign Control Bands
– Evaluate hazardous emissions
– Use appropriate laboratory hoods
– Capture hazards at the source
• Base airflow rates on:
– Hood Exhaust Requirements
– IAQ Requirements
– Pressurization/Isolation
– Comfort (Temperature)
Safe, Dependable and Energy Efficient Laboratories 8-13
System Operating Specifications Energy Savings
Require Reducing Total Building Flow
• Max and Min Flows
• AHUs and Ex. Fans
• Manifolds
─ Redundancy
─ Emergency Power
• System Static Pressure
• Duct Transport Velocity
• Exhaust Stack Discharge
• Control Capabilities
─ VAV Diversity
─ VAV Sensitivity
Safe, Dependable and Energy Efficient Laboratories 8-13
System Operating Mode Tests (SOMT)
SOMT Data Collection
• Operating Modes
o Sashes Closed - Unoccupied
o Sashes Open – Occupied
• Measure Total Flow and SP
• BAS Trend AHUs & Ex. Fans
• Record Terminal Boxes
o Flow Set Point
o BAS Flow
o Damper %
Safe, Dependable and Energy Efficient Laboratories 8-13
System Operating Mode Tests (SOMT) Opera/ng Mode
Sashes Closed -‐ Unoccupied 100% Sashes Open -‐ Occupied Terminal Serves Sash Ht. Flow
Setpoint BAS Flow Damper% Sash Ht. Flow
Setpoint BAS Flow
Damper%
EVAV1 LFH7 0 250 230 78 18 775 780 25 EVAV2 Gex1 n/a 200 120 55 n/a 100 40 80 EVAV3 LFH1 0 250 279 72 18 775 770 30 EVAV4 LFH6 0 250 235 76 18.5 797 765 28 EVAV5 Gex3 n/a 200 92 55 n/a 100 35 75 EVAV6 LFH5 0 250 268 82 17.5 753 750 22 EVAV7 Gex2 n/a 200 132 68 n/a 100 25 78 EVAV8 LFH4 0 250 750 35 18 775 780 30 EVAV9 LFH2 0 250 258 69 18 775 765 32 EVAV10 LFH3 0 250 233 75 18 775 785 40
Aggregate Terminal Flow n/a 2350 2597 66.5 n/a 5725 5495 44
Total BAS Flow 2250 5530
Measured Flow 2110 5710
VFD% 33 75
OABD% 50 10
BAS System SP 2.5 2.4
Meas. System SP 2.35 2.45
80000
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Flow
-‐cfm
BAS Trend of Combined Flow for AHUs 11&12,13&14,15&16,19&20 (Week September 1 -‐ September 9, 2012)
Average Minimum Flow -‐ cfm Maximum Flow -‐ cfm Aggregate AHU 11-‐20 -‐ Flow -‐ cfm
Safe, Dependable and Energy Efficient Laboratories 8-13
Optimize Stack Discharge and Dispersion
Re-entrainment
Optimum Design
Stack Height > 10 ft.
Stack Velocity – ? (3000 fpm)
Safe, Dependable and Energy Efficient Laboratories 8-13
Lab Safety and Energy Programs
• Rapid Energy & Lab Safety Assessment (RELSATM) – Quick, Low Cost, Low Risk Audit
– Evaluate Safety & Code Compliance
– Performance Improvement Measures (PIMs)
– Energy Conservation Measures (ECMs)
– Estimate Energy reduction, Cost and Payback
• Lab Ventilation Optimization Project (LVOPTM ) – Engineer & Implement PIMs and ECMs
– Commission Laboratory Ventilation Systems
– Improve Safety & Reduce Energy Use
• Lab Ventilation Management Plan (LVMP) – Maintain Safe & Efficient Operation
– Ensure Compliance – Conduct Routine Test and Maintenance
– Protect Return on Energy Investment
Assess
Plan
Optimize
Sustain
Safe, Dependable and Energy Efficient Laboratories 8-13
Rapid Energy & Lab Safety Assessment (RELSA)
• Meet With Key Stakeholders
• Collect & Review Building Documentation
• Survey Laboratories and Exposure Control Devices
- Inventory Devices
- Assess the Demand for Ventilation
• Evaluate State of the Systems
• Assess Conformance with ANSI/AIHA Z9.5
• Identify Performance Improvement Measures
• Identify Potential Energy Conservation Measures
• Provide Written Report & Recommendations
Information Collection
Expert Analysis
High Value Report
Safe, Dependable and Energy Efficient Laboratories 8-13
• Facility and Building Qualifying Tool – Select & Prioritize Best Projects First
• Key Metrics & Weighting Factors – Size & Space Allocation
– Energy Use & Operating Costs
– State of the Systems
– Energy Reduction Potential
• Lab Energy Profile Report – Building Classification
– Assessment of Energy Reduction
– Estimated Project Costs & Payback
Rapid Energy & Lab Safety Assessment (RELSA)
Attribute Lab Building Profile Category
• State of the Systems • Energy Reduction Potential
• Project LOE & Complexity
• Return on Investment (Payback)
Class A
Class B
Class C
Class D
Class E
Safe, Dependable and Energy Efficient Laboratories 8-13
Profile Building Total Annual Utility Cost
% Utility
Reduction
Annual Savings
$
Investment to Realize Savings
$
Payback Period
A Bldg D $1,950,000 24 $468,000 $1,404,000 3
B+ Bldg A $800,000 16 $128,000 $512,000 4
B Bldg F $600,000 21 $126,000 $567,000 5
B Bldg E $980,000 16 $156,800 $784,000 5
B- Bldg B $450,000 9 $40,500 $202,500 5
C- Bldg C $300,000 7 $21,000 $189,000 9
Totals $5,080,000 19 $940,300 $3,658,500 4
RELSA Profile & Project Prioritization
Safe, Dependable and Energy Efficient Laboratories 8-13
Lab Ventilation Optimization Project (LVOP™) • Phase 1 – Project Planning & Engineering
– Scope of Work & Specifications
– Line Diagrams & Drawings
– TAB Ready Flow Spreadsheet
– TAB & Cx Plans
• Phase 2 – Safety & Energy Optimization Project – Implement Selected PIMs & ECMs
– Verify Performance and Energy Savings
Safe, Dependable and Energy Efficient Laboratories 8-13
Executing Lab Ventilation Safety & Energy Optimization Projects
RELSA = Rapid Energy & Lab Safety Assessment
TA = Technical Assistance Vendor
PIM = Performance Improvement Measure
ECM = Energy Conservation Measures
TAB = Test, Adjust and Balance
Cx = Commissioning Tests
LVMP = Lab Ventilation Management Program
Safe, Dependable and Energy Efficient Laboratories 8-13
RELSA Profile and Optimization Project Tasks
AttributeState of the Systems
Building Operating Cost
Energy Reduction Potential
Energy Project Complexity (LOE)
ROI - Project Payback < 3 < 5 < 10 > 10 N/A
Planning RELSA & TA Study X X X X
Minor Engineering X X
Major Engineering X X
Component Repair Maintenance X X X X
Retrofits & Component Upgrades X X X
Component Replacement X X
New Equipment Installation X
TAB X X X X
CX X X X X
LVMP X X X X X
Training X X X X X
Routine T&M Services X X X X X
Building Profile
Profile
Safety & Energy Optimization
Project
Sustainability Program
A B C
Project Phase & Task
DE
(New)
Safe, Dependable and Energy Efficient Laboratories 8-13
Safe Sustainable Energy Use – Ensure ROI
Campus Wide Aggregate Energy Reduction
380
390
400
410
420
430
440
450
460
470
480
3rd Q 2004
4th Q 2004
1st Q 2005
2nd Q 2005
3rd Q 2005
4th Q 2005
1st Q 2006
2nd Q 2006
Bil
lio
n B
TU
s
Energy Target
Reduction14.7%$900,975
Energy Baseline