The Mirenda Center for Sport Spirituality and Character Development
Zachary Heilman
Mechanical Option | 2011
Dr. Jim Freihaut | Dustin Eplee
The Mirenda Center for Sport Spirituality and Character Development
$96,000
$61,000
$35,000
38 kBtu/ sf yr
18 kBtu/ sf yr
20 kBtu/ sf yr
Existing
Proposed
Savings
Life & Learning Centers
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
Bachmann
The Circle
The Mirenda Center
U.S.A.
Pennsylvania
Aston
Neumann University
Welcoming Center
Running Track & Main Gymnasium
Fitness Center
6 Packaged Roof Top Units
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
Direct Expansion Cooling
Natural Gas Heating
Roof Top Unit (1)
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
Fitness Center
Classroom
Storage
Roof Top Unit (2)
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
Offices
Locker Room
Maintenance
Roof Top Unit (3 & 4)
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
Auxiliary
Gymnasium
Roof Top Unit (5 & 6)
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
Main Gymnasium
Running Track
Trane Trace Energy Model
Modeled Building Load
1400
400
1200
350
Trace Input:
300
1000
250
200
600
150
400
100
200
50
0
0
0
1000
2000
3000
4000
Hours
5000
6000
7000
8000
Tons
800
Mbh
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
Internal Loads
Ventilation Loads
Tmy Weather Data
Building Materials
Schedule of Use
- people, lighting
- 20% minimum
- Philadelphia
- walls, roof, slab
- wkday, wkend,
summer, winter
DX- Cooling & Gas Heating to CBECS
45
40
Natural Gas Heating
𝐸𝑓𝑓 = 0.85
35
30
kBtu/ sf yr
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
25
Heating= 16 kBtu/ sf yr
20
15
10
Direct Expansion Cooling
COP=2.8
5
0
Existing
CBECS
* note CBECS is Commercial Buildings Energy Consumption Survey
Cooling= 22 kBtu/ sf yr
Monthly Energy Cost - Existing
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
Building Statistics
N. Gas
Consumption
Demand (Dmd)
Ratchet
=$0.05/ ccf (1000 btu/ c.f.
=$0.06 / kwh
=$6.21 / kw
= Dmd* 12 MONTHS
$ Heating
$ Cooling
= $13,731
= $82,735
$ Totals
= $96,466
Utility Rate Structure - Existing
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
Building Statistics
44%
56%
kWh
kW
RTCH
N. Gas
Consumption
Demand (Dmd)
Ratchet
=$0.05/ ccf (1000 btu/ c.f.
=$0.06 / kwh
=$6.21 / kw
= Dmd* 12 MONTHS
$ Heating
$ Cooling
= $13,731
= $82,735
$ Totals
= $96,466
Cost Breakdown of Electricity
Ground Coupled Heat Pump
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
Ground Coupled HP System
Modeled Building Load
1400
400
1200
350
Rule of Thumb
300
1000
800
200
600
150
400
100
200
50
0
0
0
1000
2000
3000
4000
5000
Hours
6000
7000
8000
Tons
250
Mbh
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
Well Sizing
Cooling
Heating
Depth of Well
Wells Cooling
=
=
=
=
=
150 ft/ ton
460 tons
1291 Mbh
400 ft
172 wells
Ground Coupled HP System
Modeled Building Load
1400
400
1200
350
ASHRAE Calculation
300
1000
800
200
600
150
400
100
200
50
0
0
0
1000
2000
3000
4000
5000
Hours
6000
7000
8000
Tons
250
Mbh
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
Well Size
Cooling
Heating
Depth of Well
Wells Cooling
Wells Heating
=
=
=
=
=
=
171 ft/ton
460 tons
1291 Mbh
400 ft
199 wells
42 wells
Total Energy Comparison
GCHP to CBECS
25
Heat Pump Calculation
COP = 4.5
20
kBtu/ sf yr
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
15
Heating = 4 kBtu/ sf yr
Cooling = 14 kBtu/ sf yr
10
5
20-40 ft ceiling height
0
GCHP
CBECS
Ground Coupled HP System
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
Monthly Energy Cost - GCHP
$12 000
$10 000
$8 000
$6 000
Building Statistics
$ Heating
$ Cooling
$ Total
= $4,274
= $51,026
= $55,298
Savings
= $41,168
$4 000
$2 000
$0
Jan
Feb
Mar
Apr
May
Jun
$ Cooling GCHP
Jul
Aug
$ Heating GCHP
Sep
Oct
Nov
Dec
Conventional DX Gas = $1.33/s.f.
GCHP
= $0.76/s.f.
Cost Analysis
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
Cost of (6) RTU
$476,269
Unit Well Cost (Grout + Pipe + Drilling )
$8,104
$1,612,767
Distribution Piping Zone (2) Pipes per Zone
$1,990
$33,007
Pumps + Elbows + Tees + Valves per zone
$650
$10,779
Number of Wells
199
Number of Zones
12
Total Cost
$2,132,822
Cost of GCHP Wells
Payback the Cost of Wells
$1,656,553
40
Cost Analysis
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
Cost of (6) RTU
$476,269
Unit Well Cost (Grout + Pipe + Drilling )
$8,104
$1,612,767
Distribution Piping Zone (2) Pipes per Zone
$1,990
$33,007
Pumps + Elbows + Tees + Valves per zone
$650
$10,779
Number of Wells
199
Number of Zones
12
Total Cost
$2,132,822
Cost of GCHP Wells
Payback the Cost of Wells
$1,656,553
40
500
450
400
350
300
250
200
150
100
50
0
$1 800 000
210
$1 600 000
180
$1 400 000
Number of Wells
Tons of Cooling
Hybrid GCHP with Cooling Tower
150
$1 200 000
120
$1 000 000
90
$800 000
60
$600 000
$400 000
30
$200 000
0
10
20
30
40
50
% of 8760 hours
60
70
80
90
100
0
0
10
20
30
40
50
60
% of 8760 hours
70
80
90
100
$0
0
10
20
30
40
50
60
% of 8760 hours
70
80
90
100
Hybrid GCHP with Cooling Tower
Duration of Building Load
600
500
Tons of Cooling
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
400
300
200
100
0
0
10
20
30
% of 8760 hours
40
50
60
Hybrid GCHP with Cooling Tower
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
Cost of (6) RTU
Well Cost (Grout + Pipe + Drilling )
Distribution Piping Zone (2) Pipes per Zone
Pumps + Elbows + Tees + Valves per zone
Cooling Tower
Number of Wells
Number of Zones
Total Cost
Cost of GCHP Wells
Payback
$476,269
$8,104
$567,305
$1,990
$13,933
$650
$4,550
$50,000
70
10
$1,112,057
$635,788
18
ASHRAE Calculation
Well Size
Cooling
Heating
Depth of Well
Wells Cooling
Wells Heating
Footprint
Pattern
=
=
=
=
=
=
=
=
171 ft/ton
200 tons
1291 Mbh
400 ft
70 wells
42 wells
27,976 ft2
20 by 20 Grid
Cost Analysis
DX-Cooling & Gas Heating to GCHP
40
35
30
kBtu/ sf yr
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
25
20
Energy Statistics
Ex. Heating
Ex. Cooling
Ex. Total
= 16 kBtu/ sf year
= 22 kBtu/ sf year
= 38 kBtu/ sf year
GCHP Heating
GCHP Cooling
GCHP Total
= 4 kBtu/ sf year
= 14 kBtu/ sf year
= 18 kBtu/ sf year
Savings
=20 kBtu/ sf year
15
10
5
0
Existing
GCHP
Savings
Mezzanine Proposal
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
Structural & Lighting Breadth
Load & Resistance Factor Design – Conditions
Dead Load=
40 psf
Self-Weight=
45 psf
Live Load=
80 psf
Total Factored Load= 1.2*(Dead)+1.6*(Live)
Mezzanine Width=
12 ft
Mezzanine Length=
70 ft
Total Thickness=
5.5 inches
Number of Bays=
8
Total Unfactored Load (no concrete self-weight)=
120 psf
Total Unfactored Load (with concrete self-weight)=
165 psf
Total Factored Load=
230 psf
Mezzanine Proposal
Introduction
Building Function
Existing Mechanical System
Ground Coupled Heat Pump
Cost Analysis
Mezzanine Proposal
Conclusion
Structural Breadth
Load & Resistance Factor Design – Conditions
Dead Load=
40 psf
Self-Weight=
45 psf
Live Load=
80 psf
Total Factored Load= 1.2*(Dead)+1.6*(Live)
Mezzanine Width=
12 ft
Mezzanine Length=
70 ft
Total Thickness=
5.5 inches
Number of Bays=
8
Total Unfactored Load (no concrete self-weight)=
120 psf
Total Unfactored Load (with concrete self-weight)=
165 psf
Total Factored Load=
230 psf
Overview & Recommendation
DX-Cooling & Gas Heating to GCHP
$476,269
$8,104
$567,305
40
Distribution Piping Zone (2) Pipes per Zone
$1,990
$13,933
35
Pumps + Elbows + Tees + Valves per zone
Cooling Tower
Number of Wells
Number of Zones
Total Cost
Cost of GCHP Wells
Payback
$650
$4,550
$50,000
30
70
10
$1,112,057
$635,788
18
kBtu/ sf yr
Cost of (6) RTU
Well Cost (Grout + Pipe + Drilling )
Energy Statistics
25
20
= $35,321
5
0
Conventional DX Gas = $1.33/s.f.
GCHP
= $0.84/s.f.
= 16 kBtu/ sf year
= 22 kBtu/ sf year
= 38 kBtu/ sf year
GCHP Heating
GCHP Cooling
GCHP Total
= 4 kBtu/ sf year
= 14 kBtu/ sf year
= 18 kBtu/ sf year
Savings
= 20 kBtu/ sf year
15
10
$ Savings
Ex. Heating
Ex. Cooling
Ex. Total
Existing
GCHP
Savings
The Mirenda Center for Sport Spirituality and Character Development
Thank you…
Zachary Heilman
Mechanical Option | 2011
Dr. Jim Freihaut | Dustin Eplee