david anderson mechanical option

David AndersonMechanical Option

Clemson University’s Advance Material Research Laboratory

Presentation AgendaBuilding BackgroundExisting Conditions

Mechanical RedesignDOAS/Chilled BeamsLighting Redesign

Construction EffectsConclusions

AcknowledgementsQuestions










AcknowledgementsQuestions Photo from Google Earth

Building Background

Project Team

Owner: Clemson UniversityArchitecture Firm: IDC ArchitectsContractor: Manhattan ConstructionLandscape Architect: Arbor EngineeringInterior Designer: IDC Architects

Location: Anderson, South Carolina


$18.5 Million Completed July 2004

Design-Bid-Build

Photo from Google Earth

First LEED Certified Facility First LEED Certified Facility In South CarolinaIn South Carolina

LEED SILVERLEED SILVER





Building Background

Location: Anderson, South Carolina

Occupant: Clemson University

Size: 111, 270 sq. ft.

Occupancy: OfficesResearch LaboratoriesClean RoomsConferencing


Laboratory Support

Shared Spaces/Circulation

Support/Services

Offices

Laboratories


Presentation AgendaBuilding Background

Existing ConditionsMechanical RedesignDOAS/Chilled BeamsLighting Redesign



Existing Conditions

Electrical:

•(1) 2500kVA Transformer •(5) 30-112 kVa Transformers

•300 kW Diesel Fired Stand-By Generator

•24” x 48” Fluorescent Fixtures

Lighting:

•T8 and T5 Lamps

•Quad Compact Fluorescents

Structural:

•Steel Construction

•Concrete Slabs

•Ground: 5” Slab On Grade•4x4 Welded Wire Fabric•#4 Bars In Pits and Recesses

•Elevated Floors: 2-1/2” Slab •1-1/2” Deck

Existing Conditions


Presentation AgendaBuilding Background

Existing ConditionsMechanical RedesignDOAS/Chilled BeamsLighting Redesign



Existing Conditions Existing Conditions

Mechanical:•(15) AHU’s

•(3) serve VAV Boxes

•(2) Cooling Towers•375 Ton, 1,125 gpm

•(3) Chillers•266.6 Ton, 750 gpm

•(2) Gas Fired Boilers•3,348 MBH each

•(1) Electric Boiler•4,094 MBH

•(3) Energy Recovery Coils

Mechanical:

•(4) MAH’s






Mechanical Redesign

Goals and Objectives: Optimize Ventilation and Reduce Energy

Proposal:

•Replace CAV/VAV system

•Incorporate Dedicated Outdoor Air System (DOAS) with Integrated Active Chilled Beams

Justification:

•Smaller Equipment Sizes, Reduction of Costs

•Life Cycle Cost Reduced

•More Economical for LaboratoriesDesign:

•Total Heat Recovery Incorporated

•Sensible Load Met by Chilled Beams

Mechanical Redesign



Mechanical RedesignDOAS/Chilled Beams

Lighting RedesignConstruction Effects

ConclusionsAcknowledgements

Questions

DOAS

Existing Conditions:Anderson, South Carolina

Outdoor Design DB: 93°F Summer19°F Winter

Indoor Design DB: 74°F RH: 50% DPT: 54°F

DOAS

DOAS Configuration



Mechanical Redesign

DOAS/Chilled BeamsLighting Redesign



DOAS

Enthalpy Wheel Selection:Xetex AIRotor 2500

Contamination?

Purged Enthalpy Wheel

Selection of Chilled Beams

Building’s Total Sensible Load: Qtotal= 1,139,294 Btu/h

Sensible Load Achieved by DOAS QDOAS= 97,824 Btu/h

Sensible Load To Be Met by Chilled Beams QBeams= 1,041,469 Btu/h

788 Active Chilled Beams -TROX—DID300@76 W/m2 (7.06 W/ft2)

Chilled BeamsChilled Beams

•Maintance

•Ventilation

•Piping

•Acoustics

•Coordination



Mechanical Redesign

DOAS/Chilled BeamsLighting Redesign



DOAS/Chilled Beams DOAS/Chilled Beams

AHU Resizing Annual Cost and Equipment Break Down

AHU #Original SA(cfm)

Design OA(cfm) DOAS Resized OA (cfm)

1 4000 1800 594

2 4500 1800 594

3 5700 1800 594

4 5200 1800 594

5 6300 6300 2079

6 5800 5550 1832

7 5000 400 132

33% Reduction

Totals 85000 31150 10280

Existing Components

Clemson AMRL

($)

Air System Fans 1,379,405

Cooling 925,442

Heating 7,019

Pumps 88,394

Cooling Tower Fans 932,159

HVAC Sub-Total 3,332,418

Lights 2,389,184

Electric Equipment 3,016,649

Non-HVAC Sub-Total

5,405,833

Grand Total 8,738,251

Proposed Components

Clemson AMRL

($)

Air System Fans 69,342

Cooling 229,434

Heating 3,354

Pumps 169,355

Cooling Tower Fans 115,958

HVAC Sub-Total 587,444

Lights 2,378,390

Electric Equipment 3,003,020

Non-HVAC Sub-Total

5,381,410

Grand Total 5,968,853

32% Reduction

DOAS Ventilation Air Based On 20 scfm/person



Mechanical RedesignDOAS/Chilled Beams

Lighting RedesignConstruction Effects


Questions

Lighting RedesignLighting Redesign

ASHRAE Standard 90.1-2004•Office Buildings

Clemson University’s AMRL•1.32—1.95 W/ sq. ft.

Proposal:•Remove 40 Watt T8•Install 32 Watt T5

Conclusions:

•High Efficient T5•Less Wattage•Outputs Similar

20% Reduction

Proposed:1.06—1.56 W/sq.ft

Design Lumens/Lamp Lumens/L’aire Watts

Existing 2850 8550 41,155

Proposed 2950 8850 34,243






Construction Effects Construction Effects

Mechanical System First Costs:

Existing System: •Total Cost: $3,024,000

Proposed System:•Beam Cost: $2,764,000•Equipment/Labor: $2,894,160•Total Cost: $5,658,000

$2,634,000 Increase in First Cost

•Schedule Impacts

•Labor

•Ductwork

•System Sizes

•Pumps




Construction Effects


Questions

Conclusions Acknowledgements

Overall Costs:

SystemExisting

CAV/VAV

Proposed DOAS/

Chilled Beams

Initial Cost $3,024,000 $5,658,000

Yearly Cost $8,738,251 $5,968,853

Total First Year Cost

$11,762,251 $11,626,853

47%

32%

$135,398

Year 1

•My Family and Friends

•Faculty and Staff of AE

•Clemson University

•IDC Architects





Acknowledgements

Questions

david anderson mechanical option

Documents

south carolinaoccupant

cavvav system

idc architectscontractor

idc architectslocation

clemson universitysize

kva transformers300

smaller equipment sizes

mbh each1 electric boiler4