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


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


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)


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


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 %


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

90000

100000

110000

120000

130000

140000

9/1/12

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

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

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


Optimize Stack Discharge and Dispersion

Re-entrainment

Optimum Design

Stack Height > 10 ft.

Stack Velocity – ? (3000 fpm)


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


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


•  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


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


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


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


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 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

demand for laboratory ventilation - rpic-ibic€¦ · safe, dependable and energy efficient...

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