1. Announcements Final Project Submission Tuesday, May 12th (anytime)
Project presentation Wednesday, May 13th, 10 am
- field trip at noon (same day) ?

2. Project Presentation Format and location Power Point
5 minutes presentation minutes for questions
I will you the classroom
Power Point
Approximately 5-6 slides (a minute per slide)
Problem introduction
Model development - specific problem
Results
Discussion / Summary
me or upload the file before 10 am on Wednesday, May 13th

3. Objectives Discuss Review the class material
Low temperature energy systems
Geothermal system
Review the class material
- Course evaluation

4. Low temperature energy systems
Waist heat is part of almost every CHP
Many new micro CHP system use Stirling engine

5. Stirling cycle Closed Cycle Engine No phase change
Working fluid: air, hydrogen, or helium

6. Stirling engine Theoretical efficiency of up to 25% (for 500ºC)
Real efficiency in residential
application between 6-8%

7. Ground source heating / cooling vs. geothermal
Heating and cooling by heat pump
Mostly EE generation or CHP

8. Ground source heating / cooling

9. Closed loop systems Vertical Horizontal

10. Installation
Mixing grout
Installing vertical loop

11. Horizontal loop
You need space
Depth???

12. Good / Bad Good Energy efficiency Low maintenance Water heating
No auxiliary heat
No outdoor equipment ….
Bad
First (capital) cost
Limited qualified designers
Geographically limited contractors

13. Decision three YES NO Unique Opportunity (gray water, etc.)
Groundwater for open loop,
existing well use or need
Hard rock,
good quality groundwater
Enough land for horizontal loop,
good soil for excavation
Good conditions for pond loop,
interested owner
Good conditions for vertical loop
Other
HVAC System
Hybrid
Evaluate resource
obtain permits, agreements, etc.
Good disposal
options
Aquifer test,
groundwater chemistry
Evaluate
standing column well
Pond thermal
evaluation
Test bores,
Thermal conductivity test
DESIGN
DEVELOPMENT
YES NO
Annual unbalanced loads,
AND/OR thermal storage opportunity
geology.utah.gov/emp/geothermal/ugwg/.../ppt/Chiasson0306_4.ppt

14. It is good if you have a good dissipation source
However think about environmental issues!!!

15. Vertical loops (the goal is to hit ground water)
Geo-Heat Center, Oregon Institute of Technology

16. Thermal Conductivity Test
An in-situ thermal conductivity test is need for every larger project

17. Thermal conductivity test ASHRAE 1118 TRP “Methods for Determining Soil and Rock Formation Thermal Properties from Field Tests
borehole temperature probe

18. Dynamic Test

19. Impact of soil and grout

20. Impact of operation temperature
EFT- entering fluid temperatures

21. Soil saturation issue
EFT Entering Fluid Temperature

22. Cost of a residential ground source system (it does not include furnace and ducts)
Cost is very location dependent !

23. Indoor Units

24. References
ASHRAE
Ground-Source Geothermal Systems for Commercial and Institutional Buildings.
ASHRAE ASHRAE Hnadbook: HVAC Applications, Chapter 32
International Ground Source Heat Pump Association -
…..

25. Design tool
Also: eQUEST and EnergyPlus!!!

26. Course Summary Course Objectives:
Learn about advanced building HVAC systems
Obtain knowledge about district cooling and heating systems.
Gain the skills and tools necessary to evaluate integration of sustainable energy production systems to a given building site.
Study application of combined heat and power systems in a specific building or group of buildings.
Conduct thermal, hydraulic and economic modeling of integrated building energy systems for planning and design.
Course Topics:
 Class intro and HVAC systems
Building ventilation heat recovery systems
Thermal (solar and waste heat) powered desiccant systems
4. Centralized (compressor and sorption based) cooling systems
5. Centralized heating systems
6. District heating and cooling distribution systems
7. Combined heat and power systems
8. Systems integration and control