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:
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
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)