presentation outline existing conditions redesign goals ...presentation outline project information...

1

Reed BerinatoMechanical Option

Jaharis Center for Biomedical and Nutritional Research

The Pennsylvania State University

Presentation Outline

Existing ConditionsRedesign GoalsMechanical RedesignAcoustical AnalysisEnvelope StudyCost Summary & RecommendationsAcknowledgementsQuestions

Project Information & Background




Boston, MassachusettsTufts University

$65 Million180,000 sqft.Project Schedule

Began in 1995Delayed from 1997-2000Completed in 2003






MEP Bard, Rao +

Athens Consulting Engineers

ConstructionSuffolk

Construction

Structural LeMessurier Consultants

Architectural FirmArchitectural

Resources Cambridge

Scaffolding GGG Scaffolding

Services Corp,Material Hoists Julian Crane &

Equip. Corp.Plumbing

J.C. Higgins Corp,HVAC

Limbach,Ceramic Tile,

Carpet & Resiliant Flooring

Merrimac Tile Co., Inc.

Masonry Facade NER Construction Management Inc.

Concrete Flatwork Reliable Concrete

Lead ArchitectMark Snyder

OwnerTufts University

Boston, MassachusettsProject Team




Multi Use Facility


Above GradeTwo Level Mechanical

PenthouseNine Occupied Floors

Below GradeOne Basement Level




Elevator

Mechanical


Multi Use FacilityUse Groups Basement

18,800 ft2

2




Elevator

Auditorium

Office/Conf.

Classroom

Lobby

Mechanical


Multi Use FacilityUse Groups First Floor

19,600 ft2




Elevator

Office/Conf.

Mechanical

First Level Roof Below


Multi Use FacilityUse Groups Second ˘ Third Floors

18,750 ft2




Elevator

Office/Conf.

Laboratory/Support

Shell

Mechanical


Multi Use FacilityUse Groups Fourth Floor

18,750 ft2




Elevator

Office/Conf.

Laboratory/Support

Shell

Mechanical


Multi Use FacilityUse Groups Fifth Floor

18,750 ft2




Elevator

Office/Conf.

Laboratory/Support

Fifth Level Roof Below

Mechanical


Multi Use FacilityUse Groups Sixth − Ninth Floors

10,750 ft2





Multi Use FacilityUse Groups

Mechanical PenthouseNon-Conditioned Space

3





Project Information & BackgroundExisting ConditionsRedesign GoalsMechanical RedesignAcoustical AnalysisEnvelope StudyCost Summary & RecommendationsAcknowledgementsQuestions




Air System(4) Identical 100% OA Air Handlers

70,000 cfm eachRunaround-Coil Heat Recovery

40% Effectivness3-5 Year Payback

Existing Conditions

Steam Pre-heat CoilCooling CoilSound Attenuators

(2) 35,000 cfm Supply Fans




AHU 3&4

AHU 1&2

Air SystemAHU 3 & 4

Level 4 – Level 9

AHU 1 & 2Basement – Level 3

Air DistributionVAV w / Terminal ReheatVCV w / Terminal Reheat

Existing Conditions




Chilled Water System(1) 600 ton Centrifugal Chiller(1) 800 ton Double-Effect Steam Absorption ChillerPrimary / Secondary CHP’s2-Cell Cooling Tower

Steam System125 psi Supply4 PRV’sUse

LPS: Pre-heat Coils & HX’sMPS: Laboratory AutoclavesHPS: Absorbtion Chiller

Existing Conditions

Hot Water SystemHeated By Steam HX’s2 Loops

Terminal ReheatPerimeter Heating









Depth: MechanicalInvestigate Possibility of Reducing Operating Cost

Breadth: AcousticsReduce Transmission Through Envelope

Breadth: ConstructionInvestigate Feasibility of Including BATT in Exterior Wall Composite

Redesign Goals

4









Design Alternatives to be InvestigatedIntroduction of Recirculation

Basement – Level 3

Total Energy Recovery

Mechanical Redesign




Design Alternative 1: RecirculationBasement – Level 3 ONLY

AHU 3 & 4 Will Be RedesignedAHU 1 & 2 Will Remain the Same

Existing Heat Recovery SystemAir Side Economizer (Enthalpy Controlled)Meet ASHRAE Standard 62-2001

Expected Benefit

Mechanical Redesign




Design Alternative 1: RecirculationExisting Design Simultaneous Heating & Cooling

Preheat Setpoint = 55F

Mechanical Redesign

Design Alternative 1: RecirculationControl Strategy

RedesignPreheat Setpoint = 40FSA Heating Accomplished by ReheatEliminates Simultaneous Heating and Cooling




Design Alternative 1: RecirculationReturn Damper

Ruskin CD60Low-Leakage≈ Linear Response

Mechanical Redesign




Design Alternative 1: RecirculationSystem Sizing Summary

HAP v 4.2Major system Components

Within 8% of Original DesignResizing not Justified

Mechanical Redesign

5




31,454591,111613,562Grand Total

0284,408275,405Non-HVAC Sub-Total

000Misc. Fuel Use

000Misc. Electric

n/a126,039122,050Electric Equipment

n/a158,369153,356Lights

31,454306,703338,157HVAC Sub-Total

98517,65118,636Cooling Tower Fans

7,05329,61536,668Pumps

15,20047,05962,259Heating

8,98266,45375,435Cooling

-766145,925145,159Air System Fans

Savings($)

RecirculationRedesign

($)Existing Design

($)Component

Design Alternative 1: RecirculationAnnual Operating Cost Summary

Mechanical Redesign




Design Alternative 2: Total Energy Recovery

Expected Benefit

Design Alternative 2: Total Energy RecoveryBasement – Level 3 ONLY

AHU 3 & 4 Will Be RedesignedAHU 1 & 2 Will Remain the Same

Existing Heat Recovery System in AHU 1 & 2

Mechanical Redesign




Design Alternative 2: Total Energy RecoverySemco EXCLU-SIEVE® model TE3-70

Max Airflow: 70,000 cfmAHU Airflow 55,000 cfm

Face Velocity 800 fpmOptimal Velovity

Under Design Conditions eff=78%Purge Volume = 3600 cfmPurge Index Setting = 4

Mechanical Redesign




Design Alternative 2: Total Energy RecoverySystem Sizing Summary

Chiller Plant800 ton Absorption Chiller Will RemainNew 400 ton Centrifugal Chiller Replaces Old 600 ton Unit

Trane EarthWise™ CenTraVac™ Model Was Selected3-Stage

PumpsSCHP: Aurora 411 Series

Mechanical Redesign




Design Alternative 2: Total Energy RecoveryAnnual Operating Cost Summary

36,442583,953613,562Grand Total


000Misc. Fuel Use

000Misc. Electric


n/a157,160153,356Lights

36,442301,715338,157HVAC Sub-Total

1,20517,43118,636Cooling Tower Fans

7,38229,28636,668Pumps

15,21047,04962,259Heating

10,26665,16975,435Cooling

2,379142,780145,159Air System Fans

Savings($)

Total EnergyRedesign

($)Existing Design

($)Component

Mechanical Redesign






6




OverviewSample First Floor ClassroomInterior Noise from Street TrafficAlternate Wall Composite

Higher Transmission Loss (TL)

Acoustical Analysis




Room Criteria (RC)

Acoustical Analysis

4686460180.7468.834000

19725350180.7397.112000

27764947180.7296.901000

34794544180.7235.87500

45813634180.7292.99250

56842825180.7383.88125

(Lp)rec[dB]

(Lp)source[dB]NRTLcomposit

e [dB]SwRTFreq




Alternate CompositeSame Wall ConstructionDifferent Window Assembly

Original: 1/4” – 1/4” glass w/ 1/2” AirspaceNew: 1/4” – 3/16” glass w 4” Airspace

Alternate Composite TL CalculationIdentical to previous calculation

Acoustical Analysis




Redesign Results

Acoustical Analysis

3686561180.7468.834000

15725753180.7397.112000

22765452180.7296.901000

28795150180.7235.87500

40814139180.7292.99250

43844138180.7383.88125

(Lp)rec[dB]

(Lp)source[dB]NRTLcom

[dB]SwRTFreq




Design Comparison

Acoustical Analysis

Interior Sound Pressure Levels from Street Traffic

0

10

20

30

40

50

60

125 250 500 1000 2000 4000Octave Band Center Frequency (Hz)

Lp (d

B)

Existing Design Levels

Reccomended RC RatingLevelsRedesign Levels






7




Feasibility StudyBATT Insulation in Exterior Wall CompositePrimary Research

HAP Analysis of Operating Cost ReductionAssociated First Cost

Secondary ResearchScheduling

Scheduling TimeSchedule Placement

Site & Construction RequirementsHealth Considerations & OSHA

Envelope Study




Potential Savings

Envelope Study

2,677613,562613,562Grand Total


000Misc. Fuel Use

000Misc. Electric


n/a153,356153,356Lights

2,677335,480338,157HVAC Sub-Total

63218,00418,636Cooling Tower Fans

29036,37836,668Pumps

26261,99762,259Heating

50074,94475,435Cooling

993144,166145,159Air System Fans

Savings($)

JaharisBuilding with

BATT($)

JaharisExisting Building

($)Component




First Cost

Envelope Study

8 Years$21,618.90280.245400350.180.360.00711501 Carpenter

6" Thick, R19, 15" Wide

BATT

Payback Period

Total First Cost for

insulation

Total Labor Hours

Total sqft of Wall

Labor Cost

[$/sqft]

Material Cost

[$/sqft.]

Labor Hours

per sqft.

Daily Output [sqft.]

CrewMaterial

Scheduling1-1/2 Weeks

Crew of 5 Carpenters40 Hour Work Week




SchedulingPrerequisites

Sidewalls, floors, and ceilings have been framed.Doors, windows, subflooring, and sheathing are in place.Plumbing, heating ventilating and air-conditioning work has been completely roughed in.Cabling and wiring (including telephone and other low-voltage wiring) have been completely roughed in.

Envelope Study

Site and Construction RequirementsDelivery ScheduleStorageDon’t Open Until Use

Health Considerations and OSHAInternational Agency for Research On Cancer (IARC)

Possible Carcinogen

Consumer Product Safety Commission (CPSC)Only Carcinogenic if Surgically Implanted

OSHAMinimal Protective Gear

Full ClothingRespiration Filter (in some cases)









Mechanical RedesignAll Goals AchievedGraphs for Decision Making

Cost Summary & Recommendations

Monthly Electric Power Consumption

0

50,000

100,000

150,000

200,000

250,000

300,000

350,000

400,000

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov DecMonth

Pow

er C

onsu

mpt

ion

(kW

h)

ExistingRecirculationTotal Energy

Monthly Remote Steam Consumption

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov DecMonth

Stea

m C

onsu

mpt

ion

(The

rm)


Hourly Electric Demand (January)

0

200

400

600

800

1000

1200

1400

12:0

0 AM

1:00

AM

2:00

AM

3:00

AM

4:00

AM

5:00

AM

6:00

AM

7:00

AM

8:00

AM

9:00

AM

10:0

0 AM

11:0

0 AM

12:0

0 PM

1:00

PM

2:00

PM

3:00

PM

4:00

PM

5:00

PM

6:00

PM

7:00

PM

8:00

PM

9:00

PM

10:0

0 PM

11:0

0 PM

Hour

Elec

tric

Dem

and

(kW

)


-192,130327,856-455136,181135,726Grand Total

-224,000224,000000Enthalpy Wheels (4)

00-4554550RA Damper

Pump Hardware

Pump Motors

2,87010,856013,72613,726

Chilled Water Pumps

29,00093,0000122,000122,000Electric Chiller

Savings Compared to

Existing Design

($)

Total Energy RecoveryRedesign

($)

Savings Compared to

Existing Design

($)

RecirculationRedesign

($)

Existing Design

($)Component

First Cost Summary

050,000

100,000150,000200,000250,000300,000350,000

Cos

t ($)

Existing$338,157

Recirculation$306,703

Total Energy$301,715

Design Option

Annual Cost Summary Cooling Tower FansPumpsHeatingCoolingAir System Fans

Operating Cost Summary

8




Mechanical Redesign

Design Alternative 1: RecirculationSmall First Cost IncreaseSavings Comparable to Total Energy Recovery


Acoustical Analysis

Replace WindowsProviding Acceptable First CostExisting Windows May Cause Distraction




Envelope Study

Include BATT in Exterior Wall8-1/2 Year PaybackMinimal Impact On Schedule (1-1/2 Weeks)










I Would Like To Thank:Jessica YeagerMy FamilyMy Project ContactsDr. SrebricDr. MummaDr. BahnflethDr. BurroughsDr. FreihautProf. ParfittPaul Bowers (great work!)AE Dept. Faculty & StaffPenn StateGod

Acknowledgments




Questions




Design Alternative 2: Total Energy RecoveryAHU 3 & 4 RedesignEnthalpy Wheel

Cooling CoilDraw-Thru

Mechanical Redesign

9




Design Alternative 2: Total Energy RecoveryWhy not have total energy recovery on all levels?

Laboratory ResearchInfectious Diseases

Cholera

Cross Contamination Not an OptionInternal pore diameter distribution only absorbs molecules less than 2.8 angstroms Cross Contamination < .04% not possible

Mechanical Redesign




Elevator

Office/Conf.

Mechanical


Multi Use FacilityUse Groups Third Floor




Street Traffic NoiseAt 15 metersCorrect for Distance

Cylindrical Spreading

Room ConstantGypsum WallsAcoustic Ceiling TileCarpet

Acoustical Analysis

74A-Weight

614000

652000

691000

72500

74250

77125

Lp [dB](10% Truck, 90%

Car, 35 mph, uncorrected for distance)

Octave Band Center Freque

ncy [Hz]

81A-Weight

684000

722000

761000

79500

81250

84125

Lp [dB](10% Truck, 90%

Car, 35 mph, corrected for

disatance)

Octave Band Center Frequenncy[Hz]

468.830.381618289.9150.94159.70.65159.70.0472.70.09367.64000

397.110.343279260.7890.99159.70.45159.70.0772.70.07367.62000

296.900.280994213.4710.99159.70.2159.70.1272.70.04367.61000

235.870.236919179.9870.83159.70.1159.70.1872.70.05367.6500

292.990.278322211.4410.93159.70.05159.70.2572.70.1367.6250

383.880.335683255.0180.76159.70.01159.70.3572.70.29367.6125

RTαSABA = ∑SiαiαcScαfSfαgSgαwSwFreq




Classroom Exterior Wall Section

Acoustical Analysis




Exterior Wall Transmission Loss (TL)Structural Composite TL InterpolatedWindow Composite TL Taken DirectlyArea Weighted TL Calculated

Acoustical Analysis

⎥⎦⎤

⎢⎣⎡ +

−=S

SSTLcomposite2211log10 ττ

10/1

110 TL−=τ

10/2

210 TL−=τ

6057654000

5046602000

4744531000

444052500

343042250

252140125

TLcomposite[Db]

TLwindow[Db]Tlwall [Db]

Octave Band Center

Frequenncy [Hz]




Interior Sound Pressure LevelsCalculated Using Noise Reduction (NR) Equations

Acoustical Analysis

recpsourcep LLNR )()( −=

⎟⎟⎠

⎞⎜⎜⎝

⎛+=

w

T

SRTLNR log10

4686460180.7468.834000

19725350180.7397.112000

27764947180.7296.901000

34794544180.7235.87500

45813634180.7292.99250

56842825180.7383.88125

(Lp)rec [dB](Lp)source[dB]NRTLcomposite

[dB]SwRTFreq

presentation outline existing conditions redesign goals ...presentation outline project information...

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