Transcript Slide 1

Design of a Demonstration Unit for Ground
Source Heat Pump for Sub-Tropical Regions
with Solar Power
Daniel Alonzo
Esteban Cifuentes
Martha Casas
Problem Statement
 Design of a ground source heat pump for sub-tropical
regions.
 Design of the ground loop system according to land
area, cost, effectiveness and ground temperatures.
 Demonstration of the superior energy efficiency of
alternative energy systems.
Metrics
Water to Air Heat
Pump
 Used to obtain the heat
from the household and
deposit it into the ground.
 Cooling Capacity: 2 Tons
 Energy Efficiency Ratio
(EER): 19.1
 Coefficient of Performance:
(COP): 4.0
Metrics
Water to Water Heat
Pump
 Used to transfer heat from
the ground to produce hot
water.
 Cooling Capacity: 2 Tons
 Energy Efficiency Ratio
(EER): 14.5
 Coefficient of Performance:
(COP): 2.8
Metrics
Ground Loop
 Slinky ground loop will be
used to transfer heat from
or to ground.
 Length≈ 200 feet
 Material: high density
polyethylene (HDPE)
 Cost: $0.70 to $1.80 per
foot
 Depth: 3 to 6 feet
Conceptual Designs
 Design of a Ground Loop
 Depends on:
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Cost
Land Area Available
Efficiency
Ground Temperature
Conceptual Design I: Horizontal
Loop
 Cost Effective
 Large Land Area
 Lots of Piping
Conceptual Design II: Vertical
Design
 Small Land Area Required
 Deep Holes
 Less Piping
 More Expensive
Conceptual Design III: Individual
Ground Loop System
 Two slinky ground loops for
each heat pump utilized in
the design
 High Precision Heat
Transfer
 Large Land Area
 More Piping
 More Expensive
Proposed Design
 One Slinky Ground Loop
Connected to both Heat
Pumps
 Less Ground Required
 Cost Effective
 No Deep Trenching
Structural Design
Trench deepness, length and
piping depend on:
 Temperature Change in
Condenser and Evaporator
 Average Temperature of
Ground
 Type of Soil
 Material for Ground Loop
Cost
Cost Analysis
Analysis
Item
Budget
Ground Loop Materials
$2,000.00
A/C Terminal Unit
$500.00
Water Tank with Heat Exchanger
$500.00
Temperature and Flow Rate Sensors
$2,000.00
Heat Pump Unit
$2,000.00
Total
$7,000.00
Conclusion
 Major Tasks
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Structural Design
Heat Transfer and Energy Analysis
Sizing of Ground Loop
Drilling
System Installation
Testing using Flow Rate and Temperature Sensors
 Ground Source Heat Pumps
 Efficient and Reliable System
 Environmentally Friendly
 Conserve Natural Resources
Acknowledgments
 Dr. Yong X. Tao
 Florida Heat Pump, Inc.
 American Society of Heating, Refrigerating, and AirConditioning Engineers (ASHRAE)