This document summarizes a seminar presentation on geothermal heat pumps. It discusses how geothermal heat pumps work by using the stable temperature of the earth to heat and cool buildings. Geothermal heat pumps circulate antifreeze through underground pipes to extract heat from the earth in winter and reject heat into the earth in summer. This allows the system to provide heating, cooling, and hot water more efficiently than conventional HVAC systems. While the initial installation cost of geothermal heat pumps is higher, they provide long-term savings on energy and maintenance costs.

1. A Seminar
on
By
Mr. Akshay Bajirao Zade
T120131051
Guided By
Prof. M.V.Bhadak
K.K.WAGH INSTITUTE OF ENGINEERING
EDUCATION & RESEARCH
Department of Mechanical Engineering

2. INTRODUCTION
 Heat pump
 Geothermal heat energy
 Geothermal heat pump(G.H.P)

3. FIRST EXPERIMENT OF
GEOTHERMAL HEAT PUMP,1855

4. TEMPERETURE VARIATION BELOW
EARTH SURFACE

5. THE EARTH IS THE SOURCE OF
HEAT IN WINTER…
Outdoor air
design temperature:
40°F in winter
50°F
60°F
Insulating layer of earth
A geothermal heat pump takes heat from the earth
during winter and transfers it into the building

6. …AND AN EFFICIENT PLACE TO
REJECT HEAT IN SUMMER…
Outdoor air
design temperature:
100°F in summer
72°F
60°F
Insulating layer of earth
A geothermal heat pump cools the building in
summer by rejecting heat into the earth

7. CONNECTIONS FOR G.H.P
 CLOSED LOOP

8. CONNECTIONS FOR G.H.P
 OPEN LOOP

9. WORKING OF G.H.P
 An antifreeze solution is circulated through plastic
pipes buried beneath the ground for closed loop
systems. The fluid gathers heat from the earth and
circulates it through the system and into the
building. During the summer, the system reverses
itself and pulls heat from the structure and places it
in the ground. This process creates free hot water
in the summer and produces a considerable
savings on hot water in the winter

10. SITE SELECTION FOR G.H.P
 GEOLOGY
 HYDROLOGY
 LAND AVAILABLITY

11. ADVANTAGES OF G.H.P:
 Simpler in design and maintenance
 Does not require a unit outside exposed to the
weather
 Longer equipment life
 They use less refrigerant
DISADVANTAGS OF G.H.P:
 Higher initial cost due to piping or drilling of a well
 Lack of trained and experienced designers and
installers less efficient system is install

12. ENVIRONMNTAL IMPACTS OF G.H.P
 Geothermal heat pumps always produce less
greenhouse gases than air conditioners, oil
furnaces, and electric heating
 The fluids used in closed loops may be designed to
be biodegradable and non-toxic, but the refrigerant
used may be chlorodifluoromethane, which is
ozone depleting substance.
 Open loop systems that draw water from a well and
drain to the surface may contribute to aquifer
depletion, water shortages, groundwater
contamination, and subsidence of the soil.

13. ECONOMICS
 Geothermal heat pumps save money in operating
and maintenance costs
 Although initially more expensive to install than
conventional systems, properly installed GHPs
deliver more energy per unit consumed than
conventional systems.
 In the summer cooling period, the heat that is taken
from the house is used to heat the water for free,
which saves money for heating water

14. APPLICATIONS

15. CONCLUSION
 Using Geothermal Heat Pump Green house gasses
emissions can be minimized
 Geothermal heat pumps are highly efficient heating
technologies that allow for reductions in CO2
emissions
 Heat pumps utilize significantly less energy to heat
or cool a building than alternative heating systems
 GHP systems generally have a higher first cost
than conventional HVAC systems, but the energy,
maintenance and replacement savings can result in
paybacks

16. REFERENCES
 Stuart J. Self, Bale V. Reddy, Marc A. Rosen., “Geothermal
heat pump systems: Status review and comparison with other
heating options”, Applied Energy, 2013, 101, pp 341-348
 Biagio Morrone, Gaetano Coppola, Vincenzo Raucci., “Energy
and economic savings using geothermal heat pumps in
different climates”, Energy Conversion and Management,
2014,88, pp 189-198
 Hanova, J; Dowlatabadi, H., "Strategic GHG reduction through
the use of ground source heat pump technology",
Environmental Research Letter, 2007, 91, pp 26-48
 www.igshpa.okstate.edu
[http://www.igshpa.okstate.edu/about/]
 www.icax.co.uk
[http://www.icax.co.uk/Disadvantages_Ground_Source_Heat_
Pumps.html]
 www.energy.gov [http://energy.gov/energysaver/choosing-and-
installing-geothermal-heat-pumps]