Demand for Laboratory Ventilation

Transcription

1 Demand for Laboratory Ventilation Operating Mode Min and Max Flow Temperature Control Dilution ACH Air Change Effectiveness Room Pressure Transfer Volume Qe - Exhaust Qt = Qe Qs Qt = Constant Room Pressure + -

2 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

3 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

4 System Operating Specifications Max and Min Flows AHUs and Ex. Fans Manifolds Redundancy Energy Savings Require Reducing Total Building Flow Emergency Power System Static Pressure Duct Transport Velocity Exhaust Stack Discharge Control Capabilities VAV Diversity VAV Sensitivity

5 System Operating Mode Tests (SOMT) SOMT Data Collection Operating Modes o o Sashes Closed - Unoccupied Sashes Open Occupied Measure Total Flow and SP BAS Trend AHUs & Ex. Fans Record Terminal Boxes o o Flow Set Point BAS Flow o Damper %

6 System Operating Mode Tests (SOMT) Opera/ng Mode Sashes Closed - Unoccupied 100% Sashes Open - Occupied Terminal Serves Sash Ht. Flow BAS Flow BAS Damper% Sash Ht. Setpoint Flow Setpoint Flow EVAV1 LFH EVAV2 Gex1 n/a n/a EVAV3 LFH Damper % EVAV4 LFH BAS Trend 797 of Combined 765 Flow for 28 AHUs 11&12,13&14,15&16,19&20 EVAV5 Gex3 n/a n/a 100 (Week September September 9, 2012) EVAV6 LFH EVAV7 Gex2 n/a n/a EVAV8 LFH EVAV9 LFH EVAV10 LFH Aggregate Terminal Flow n/a n/a Total BAS Flow Measured Flow VFD% OABD% BAS System SP Meas. System SP Flow - cfm /1/12 12:00:00 AM PDT 9/1/12 6:00:00 AM PDT 9/1/12 12:00:00 PM PDT 9/1/12 5:30:00 PM PDT 9/1/12 11:00:00 PM PDT 9/2/12 5:00:00 AM PDT 9/2/12 11:00:00 AM PDT 9/2/12 5:00:00 PM PDT 9/2/12 11:00:00 PM PDT 9/3/12 5:00:00 AM PDT 9/3/12 11:00:00 AM PDT 9/3/12 5:00:00 PM PDT 9/3/12 11:00:00 PM PDT 9/4/12 5:30:00 AM PDT 9/4/12 11:30:00 AM PDT 9/4/12 5:00:00 PM PDT 9/4/12 11:00:00 PM PDT 9/5/12 5:00:00 AM PDT Average Minimum Flow - cfm Maximum Flow - cfm Aggregate AHU Flow - cfm 9/5/12 11:00:00 AM PDT 9/5/12 4:30:00 PM PDT 9/5/12 10:30:00 PM PDT 9/6/12 4:30:00 AM PDT 9/6/12 10:30:00 AM PDT 9/6/12 4:00:00 PM PDT 9/6/12 10:00:00 PM PDT 9/7/12 4:00:00 AM PDT 9/7/12 10:00:00 AM PDT 9/7/12 3:30:00 PM PDT 9/7/12 9:30:00 PM PDT 9/8/12 3:30:00 AM PDT 9/8/12 9:30:00 AM PDT 9/8/12 3:30:00 PM PDT 9/8/12 9:30:00 PM PDT 9/9/12 3:30:00 AM PDT 9/9/12 9:30:00 AM PDT 9/9/12 3:00:00 PM PDT 9/9/12 9:00:00 PM PDT

7 Optimize Stack Discharge and Dispersion Re-entrainment Stack Height > 10 ft. Stack Velocity? (3000 fpm) Optimum Design

8 Lab Safety and Energy Programs Rapid Energy & Lab Safety Assessment (RELSA TM ) 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 (LVOP TM ) 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

9 Rapid Energy & Lab Safety Assessment (RELSA) Meet With Key Stakeholders Collect & Review Building Documentation Survey Laboratories and Exposure Control Devices Information Collection - Inventory Devices - Assess the Demand for Ventilation Evaluate State of the Systems Expert Analysis Assess Conformance with ANSI/AIHA Z9.5 Identify Performance Improvement Measures Identify Potential Energy Conservation Measures Provide Written Report & Recommendations High Value Report

10 Rapid Energy & Lab Safety Assessment (RELSA) 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 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

11 RELSA Profile & Project Prioritization Profile Building Total Annual Utility Cost % Utility Reduction Annual Savings $ Investment to Realize Savings $ Payback Period A Bldg D $1,950, $468,000 $1,404,000 3 B+ Bldg A $800, $128,000 $512,000 4 B Bldg F $600, $126,000 $567,000 5 B Bldg E $980, $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, $940,300 $3,658,500 4

12 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

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

14 RELSA Profile and Optimization Project Tasks Attribute Building Profile Profile State of the Systems Building Operating Cost Energy Reduction Potential Energy Project Complexity (LOE) ROI - Project Payback < 3 < 5 < 10 > 10 N/A Project Phase & Task A B C Planning RELSA & TA Study X X X X D E (New) Safety & Energy Optimization Project Sustainability Program 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 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 X

15 Safe Sustainable Energy Use Ensure ROI Campus Wide Aggregate Energy Reduction Energy Baseline Billion BTUs Energy Target Reduction 14.7% $900,975 4th Q rd Q nd Q st Q nd Q st Q th Q rd Q 2005