geo thermal system
TRANSCRIPT
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A
PROJECT PRESENTATION
ON
“COOLING BY GEOTHERMAL
ENERGY”
Department of Mechanical Engineering
Presented by:-DHEERAJ PATIDAR
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Cooling by Geothermal energy
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content:-
• Geothermal energy
• Resources of geothermal energy
• Generation
• Introduction
• Energy source
• Geothermal Performance Comparison
• Loop types
• Components used
• Construction
• Working
• Advantages
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•Disadvantages
•Future scope
•Application
•Conclusion
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Geothermal
Geothermal
Greek word
Geo = EarthThermal= Heat
It’s means heat provide by the earth
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Val canoesMagma Resources
Petro-thermalHydro-thermal
Geo pressured
Resources of Geothermal Energy
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Generations
Direct
• Small scale uses
• Heating homes
• Hot springs
• Greenhouse heating
• Food dehydration plants
• Agriculture
Electrical
• Dry steam
• Flash steam
• Binary cycle
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Introduction
• The earth loop is placed in the ground either horizontally
or vertically, or it can be placed in a pond.
• Water and anti-freeze is circulated through the pipe,
transporting heat to the heat pump during the heating
mode and away from the heat pump during the cooling
mode.
• The heat transfer takes place inside the heat pump in a
water-to-refrigerant heat exchanger.
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Energy Source
• During the heating season, the earth serves as a heat
source. (HE - Heat of extraction)
• During the cooling season, the earth serves as a heat
sink. (HR - Heat of rejection)
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Free Energy
• Geothermal Heat Pumps use only a small amount of
energy to capture a large amount of FREE energy from
the earth.
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Equipment Performance Ratings
• ARI has designated the efficiency ratings for water-to-air
heat pumps as:
– Energy Efficiency Ratio (EER)
• EER = BTU output divided by power watt input
• For cooling operation under steady state test
conditions
– Coefficient of Performance (COP)
• COP = BTU output divided by BTU input
• For heating operation under steady state test
conditions
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Geothermal Performance Comparison
0
5
10
15
20
25
30
Cooling Efficiency (EER)
New Geothermal Unit
Previous Geothermal Unit
High Efficiency AC or Heat
Pump
Ordinary Air Conditioner or Heat
Pump
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Geothermal Performance Comparison
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Heating Efficiency (COP)
New Geothermal Unit
Previous Geothermal Unit
Heat Pump
High Efficiency Gas/Propane
Furnace
Ordinary Gas/Propane Furnace
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Loop Types
• Can be cheaper initial
install cost
• If walls is fails no heating
or cooling
• Not allowed in some local
areas
• High maintenance
• Uses existing well
Open Loop system
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Closed loop systems
• Low maintenance
• Typical one time install, long warranty on pipe
• Higher up front installation cost
• Requires dedicates space for wells or trenches
➢ Types of closed loop system
1) Horizontal loop
2) Vertical loop
3) pond loop
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Vertical Loop Pond Loop
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Horizontal Loop
• If adequate soil or clay
based land is available &
it’s more economical
choice
• A typical horizontal loop
will have 400-600 feet of
pipe for heating & cooling
• Because of the amount
trenching involved
horizontal ground loops
are most commonly used
for new construction
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Components used:-
• Loop of G.I pipes (size- 1.0 inch, 370 feet)
• Heat exchanger (Radiator)
• Mono block pump (0.5 HP)
• Coolant (Water)
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Construction of project:-
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working:-
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Cooling Mode Operation
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Heating Mode Operation
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Advantages
• Geothermal system are able to transfer heat to the ground
with minimum use of electricity
• Geothermal system are environment friendly
• Based on renewable energy source
• Don’t use fuel for heating & cooling purpose
• Geothermal system are more reliable and efficient compare
to the conventional system
• Operating and maintenance cost is so low
• It’s least polluting compared to the other conventional
energy sources
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Advantages
• Once we built a geothermal power station then the
energy is almost free
• Geothermal heat pump are especially well matched to
under floor heating system which don’t require
extremely high temp.
• With use of geothermal system it’s consumption level of
electricity is so low compared to the conventional system
• No sticky feeling
• Additional cost of geothermal system is usually recovered
in about 5 years.
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Disadvantages
• Largest areas are needed for exploitation of geo-thermal
energy as much of it’s diffused
• Installation cost is so high
• Once we built geothermal loop system then we don’t
change it
• Required hot rock of a suitable type at a depth where we
can drill down to them
• Hazardous gases & minerals may come up from
underground and can be difficult to safely dispose of
• Largest amount of work’s are required
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Future scope:-
• With use of geothermal system in future it’s solve out to the
energy crisis problem at a level
• Geothermal system its reduce energy consumption cost
with comparison of conventional Energy sources
As:-
1) Reduce cooling cost up to 35%
2) Reduce heating cost up to 50%
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Application
• Generation of electric power
• Industrial Process heat
• Food processing
• Space heating for building
• Bathing facilities
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Conclusion
• It’s consume less electricity compare to the conventional
system
• It’s least polluting compared to the other conventional energy
sources
• Even with the high initial cost of purchasing a geothermal
system the payback period is relatively short b/w 3 to 5years
• The life span of the system is longer than conventional
heating & cooling system most loop fields are warranted for
25 to 50 years &expected to at least 50 to 200 years
• Compare with geothermal system to the conventional system
it’s save to 30 to 70 % energy annually
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Cornerstone Christian Academy
51,000 Sq. Ft.
Annual Cost for Heating, Air
Conditioning, and Hot Water
Conventional System Geothermal System
$32,618 $8,519
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Martin Implement
Quincy, IL
29,225 Sq. Ft.
Annual Cost for Heating, Air
Conditioning, and Hot Water
Conventional System Geothermal System
$13,986 $3,581
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Trinity Lutheran Church
Golden, IL
16,000 Sq. Ft.
Annual Cost for Heating, Air
Conditioning, and Hot Water
Conventional System Geothermal System
$12,926 $3,984
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