BUILDING STATISTICS Introduction Owner: CFBC Properties, LLC - - PowerPoint PPT Presentation

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BUILDING STATISTICS Introduction Owner: CFBC Properties, LLC - - PowerPoint PPT Presentation

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INTRODUCTIOIN BUILDING STATISTICS Introduction Owner: CFBC Properties, LLC Occupancy Type: Office Building Statistics General Contractor: Carl Belt, Inc. Location & Weather Condition Size: 46,793 SF Existing

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SLIDE 1
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SLIDE 2

CareFirst Cumberland

INTRODUCTIOIN

Chan Mi Hwang Mechanical Option

  • Introduction
  • Building Statistics
  • Location & Weather Condition
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Heating/Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion
  • Occupancy Type: Office
  • Size: 46,793 SF
  • Number of Stories: 2 Floor above grade
  • Overall Project Cost: $13 million
  • Construction Timeline: March 2010-May

2011

BUILDING STATISTICS

  • Owner: CFBC Properties, LLC
  • General Contractor: Carl Belt, Inc.
  • Architects: VOA Associated, Inc.
  • Civil Engineer: SPECS, Consulting Engineer

& Surveyors

  • MEP Engineer: R.G. Vanderweil Engineers, LLP
  • Structural Engineer: Tadjer Cher Edelson Assoiates, Inc.
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SLIDE 3

CareFirst Cumberland Chan Mi Hwang Mechanical Option

  • Introduction
  • Building Statistics
  • Location & Weather Condition
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion

INTRODUCTIOIN LOCATION WEATHER CONDION

Baltimore, MD

Design Condition (0.4%)

  • Summer

 93.9 °F DB  74.9 °F MCWB

  • Winter

 12.9°F DB

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SLIDE 4

CareFirst Cumberland

EXISTING CONDITION

Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Mechanical Design
  • Energy Model/Conclusion
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion

MECHANICAL DESGIGN

  • Ground-Coupled System

 35-90 °F EWT  230 GPM Circulating pumps  1500 MBH Auxiliary Boiler  50 Tons Auxiliary Cooling Tower  55-85 °F GXWS

  • Dedicated Outdoor Air System

 9000 CFM RTU  Enthalpy Recovery Wheel

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SLIDE 5

CareFirst Cumberland

EXISTING CONDITION

Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Mechanical Design
  • Energy Model/Conclusion
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion

Designed Condition Cooling DB 75°F Heating DB 70 °F Relative Humidity 50 %

MECHANICAL DESGIGN

  • 45 Geothermal Heat Pumps
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SLIDE 6

CareFirst Cumberland

EXISTING CONDITION

Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Mechanical Design
  • Energy Model/Conclusion
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion
  • High initial investment cost
  • High electricity consumption
  • Low operating cost
  • Zone thermal comfort control
  • Forced air system
  • Total Loads

 153 Tons of Cooling  1784 MBH of Heating  Annually 350,000 KWH Electricity  Annually $37,283 Utility Cost

ENERGY MODELING CONCLUSION

2,600 2,700 2,800 2,900 3,000 3,100 3,200 3,300 3,400 3,500

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SLIDE 7

CareFirst Cumberland

THESIS PROPOSAL

Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion
  • Reduce Initial Investment
  • Reduce Electrical Consumption
  • Increase Maintainability

GOALS PROPOSAL

  • Reduce Initial Investment by replacing

Geothermal System to Chiller/Heater

  • Reduce Electrical Consumption by replacing

Heat pumps to radiant panel system

  • Increase

Maintainability by Central Plant

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SLIDE 8

CareFirst Cumberland

MECHANICAL DEPTH

Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion
  • Chiller/Heater Central Plant

 Absorption Chiller  Cooling Tower  Heater

  • Rooftop Unit

 Enthalpy Recovery Wheel  Latent Load-Cooling Coil  Precondition Heating Coil

  • Radiant Cooling/Heating Panels

Chiller/Heater Cooling Tower Radiant Panels Rooftop Unit

PROSPOSED ALTERNATIVE

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SLIDE 9

CareFirst Cumberland

MECHANICAL DEPTH

Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion
  • DIRECT-FIRED CHILLER/HEATER
  • Heating Only
  • Cooling Only
  • Simultaneous Mode

OPERATION MODE

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SLIDE 10

CareFirst Cumberland

MECHANICAL DEPTH

Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion

200 400 600 800 1000 1200 1400 1600 1800 2000

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

Monthly Loads of CareFirst, MBH

Heating Load Cooling Load

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SLIDE 11

CareFirst Cumberland

INTEGRATED PART LOAD VALUE (IPLV)

Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion
  • Partial load (IPLV)=1.193

MECHANICAL DEPTH

% Load TSA-DC C.O.P. 100 1 75 1.154 50 1.25 25 1.136 ARI #560-2000 Performance

200 400 600 800 1000 1200 1400 1600 1800 2000 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Input & Output Energy Comparison

  • f Chiller/Heater, MBH

Input Energy Output Cooling Output Heating

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CareFirst Cumberland

MECHANICAL DEPTH

Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Heating/Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion
  • Annually 65 Tons of Cooling Loads
  • Annually 243 MBH of Heating Loads

100 200 300 400 500 600 700 800 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Heating Cooling

WASTE ENERGY IN SIMULTANEOUS MODE

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SLIDE 13

CareFirst Cumberland Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breath
  • Partition Replacement
  • Conclusion

MECHANICAL DEPTH

  • Superior Comfort
  • Quiet Operation
  • Lower Initial Investment Cost
  • Flexible Installation

RADIANT CEILING PANEL INTEGRAL DIFFUSER PANEL

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SLIDE 14

CareFirst Cumberland Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breath
  • Partition Replacement
  • Conclusion

MECHANICAL DEPTH

  • Ventilation
  • Latent load
  • Condensation issue
  • Water Design Approach

 Dew Point Temperature

COOLING PANEL ISSUES

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SLIDE 15

CareFirst Cumberland Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breath
  • Partition Replacement
  • Conclusion

MECHANICAL DEPTH

Occupant Latent Load (Btu/h-person) Number of Occupancy Total Latent Load (Btu/h) 205 445 91225

LATENT LOAD RECOVERY

q_lat 0.69 CFM delta W 91225 0.69 9000 14.7 Required Latent Load

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SLIDE 16

CareFirst Cumberland Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breath
  • Partition Replacement
  • Conclusion

MECHANICAL DEPTH

Required CL on cooling panel= (Total required CL) - (CL on Cooling coil)

SENSIBLE LOAD RECOVERY

q_sen 1.08 CFM delta_T 245916 1.08 9000 25.3 Sensible Load_Cooling coil

153 Tons (1836 MBH) - 246 MBH = 1590 MBH

q_tot 4.5 CFM delta_h 307800 4.5 9000 7.6 Grand Load_Cooling Coil

EWT LWT ΔT GPM EWT LWT ΔT EWT LWT ΔT 68.5 53 15.5 237 53 55.6 2.6 55.6 69.1 13.5 Water-Side Design Chiller Cooling Coil Cooling Panel

DESIGN CONCLUSION

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SLIDE 17

CareFirst Cumberland Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breath
  • Partition Replacement
  • Conclusion

MECHANICAL DEPTH

Airtite Radiant Panel w/ Center Slotted Air Diffuser

  • Total Required Cooling Load= 1590 MBH
  • Selected Cooling Panel Capacity = 72 BTUH/SF
  • Total Cooling Panel Area= 22,000 SF

COOLING PANEL SELECTION COOLING PANEL LAYOUT

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SLIDE 18

CareFirst Cumberland

MECHANICAL DEPTH

Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion

5,000 10,000 15,000 20,000 25,000 30,000 35,000 200 400 600 800 1,000 1,200 1,400 1,600 1,800

ELECTRICAL CONSUMPTION NATURAL GAS CONSUMPTION

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CareFirst Cumberland

MECHANICAL DEPTH

Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion

$- $500 $1,000 $1,500 $2,000 $2,500 $3,000 $3,500 $4,000 $4,500 50000 100000 150000 200000 250000 300000 350000

Existing Alternative

Distribution System Central Plant

ENERGY COST INITIAL INVESTMENT COMPARISON

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CareFirst Cumberland

MECHANICAL DEPTH

Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion

Capital Cost, $ Operation, $ Existing 321377 37283 Alternative 2 219200 41305 Investment Operation Saving 102177 4022 Simple Payback Period, years 25.4

SIMPLE PAYBACK CONCLUSION

  • Existing

 Higher Initial Investment  Lower Operation Cost  Zone Controllability

  • Alternative

 Lower Initial Investment  Higher Operation Cost  Radiant + Convection Heat Transfer

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CareFirst Cumberland

ACOUSTICAL BREADTH

Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion
  • Alternative Noise Consideration

 Hot water pumps  Condensed water pumps  Chilled water pumps  Chiller/Heater

NOISE CONSIDERATION ROOM LAYOUT

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SLIDE 22

CareFirst Cumberland

ACOUSTICAL BREADTH

Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion
  • ASHRAE Ch. 48 Noise and Vibration Control

 Airborne path through partition  Receiver Consideration  Conference Room : NC-30

NOISE LEVEL REQUIREMENT EXISTING PARTITION

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CareFirst Cumberland

ACOUSTICAL BREADTH

Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion
  • Existing Partition Noise Reduction

MECHANICAL NOISE LEVEL NOISE REDUCTION REQUIRED

OctaveBand Frequencies (Hz) 125 250 500 1000 2000 4000 SPL of all source in each Octave Band (dB) 86 81 79 77 67 63 Converted to A-weighted (dBA)

OctaveBand Frequencies (Hz) 125 250 500 1000 2000 4000 Noise in Mechanical Room (dB) 86 82 81 80 71 66 Background Noise Level in Conference (NC-35) 52 45 40 36 34 33 Required TL (dB) 34 37 41 44 37 33

  • Assume all Noise Source Operating in Full

Capacity

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SLIDE 24

CareFirst Cumberland

ACOUSTICAL BREADTH

Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion
  • 3-5/8” steel channel Studs with 2 layers
  • f 5/8” gypsum boards both sides

PROPOSED PARTITION CONCLUSION

125 250 500 1000 2000 4000 Required TL (dB) 34 37 41 44 37 33 Proposed Partition 34 41 51 54 46 52 Remaining TL (dB)

  • 4
  • 10
  • 10
  • 9
  • 19
  • Required NR comply
  • Partition wall section

areas

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SLIDE 25

CareFirst Cumberland

CONCLUSTION

Chan Mi Hwang Mechanical Option

  • Introduction
  • Existing Condition
  • Thesis Proposal
  • Mechanical Depth
  • Direct-Fired Chiller-Heater
  • Radiant Cooling Ceiling Panel
  • Acoustical Breadth
  • Partition Replacement
  • Conclusion
  • Alternative

 Lower Initial Investment  Lower electrical consumption  Easier maintainability

CONCLUSION

QUESTION?