solar thermal air conditioner design team 8. introduction solar air conditioner introduction design...
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SOLAR THERMAL AIR CONDITIONER
Design Team 8
IntroductionSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 2
Team 8: Chris DesRoches Patricia Duncan James Mills Amanda Wiseman
Supervisor: Dr. Dominic Groulx
Outline
Introduction Background Problem Definition
Design System Calculations
Conclusion Future Work Testing
Acknowledgements
Background Information
Solar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 4 Source: http://www.energystar.gov/index.cfm?
c=products.pr_pie
Figure 1: Energy Use in a Typical Home
Background Information
Solar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 5
Source: http://www.nlcpr.com/solar_install.php
Figure 2: Average Annual Solar Insolation in NS
Problem DefinitionSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 6
Design a working solar powered air conditioner
Goals: Provide 0.5 tons of cooling Minimum system COP of 0.4 Maximum size of 125 L
Design SelectionSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 7
Absorption-
Ammonia
Absorption-
Lithium
Bromide
Desiccant Thermochemical
Size (5) 5 1 3 3
Safety (4) 2 4 3 2
Simplicity (4) 4 2 2 2
Ergonomics (3) 3 3 1 3
Total (16) 14 10 9 10
DesignSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 8
Cooling System Components Generator Condenser Evaporator Absorber
DesignSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 9
DesignSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 10
DesignSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 11
DesignSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 12
Air Conditioning Process
DesignSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 12
Ammonia Solubility in Water
HYSIS SimulationSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 13
Peng-Robinson cubic equation of state model approximation
Heat Transfer Calculations
Solar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 14
Air cooling1
Finned Tubes1
1Bergman, T., Dewitt, D., Incropera, F., Lavine, A. (2007). Introduction to heat transfer. Hoboken, NJ: Wiley, pp. 150-160; 400-410.
Absorber DesignSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 15
Fan cooling: 27 W/m2*K Length:140 in Fin Dimensions:
Spacing: 0.4 in Length: 1.25 in Thickness: 0.125 in Material: Steel
Condenser DesignSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 16
Fan cooling: 27 W/m2*K Length: 7 in Fin Dimensions:
Spacing: 1.0 in Length: 1.25 in Thickness: 0.03125 in Material: Steel
Evaporator DesignSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 17
Fan cooling: 17 W/m2*K Length: 130 in Fins:
Spacing: 0.5 in Length: 3.25in Thickness: 0.03125 in Material: Steel
Generator Calculations
Solar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 18
Heat transfer coefficients in coiled tube:
Overall heat transfer and area required:
Generator DesignSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 19
Generator Helical-coil
heat exchanger was selected
Length: 12 in Materials:
Steel, Copper, R-12 polystyrene insulation
SafetySolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 20
Ammonia absorption cycle is widely used in the RV industry
Sensors will be included in case of leaks
Certified refrigeration technologist will assist in constructing and charging the system
BudgetSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 21
Basic Cost Revised Cost
Parts $ 2,145.68 $ 1,983.40
Labour $ 480.00 $ 280.00
Total $ 2,625.68 $ 2,263.40
Some parts may need to be custom fabricated, including the generator
The team is anticipating an existing cooling cycle will be donated and modified
Future WorkSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 22
Fabrication and assembly of system
Continuous improvements to design where applicable
Testing of air conditioner performance
TestingSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 23
Air conditioner will be tested in an insulated/sealed control volume with controlled heat input
Tests will involve constant heat input, as well as simulation of expected solar inputs for different climates
ConclusionSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 24
Solar thermal energy can be harnessed to cool a residential space
Cycle simulations are complete and components are sized
Manufacturing and testing to follow
AcknowledgementsSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 25
Dalhousie University Faculty of Mechanical
Engineering Dr. Dominic Groulx Dr. Julio Militzer
NSCC Dr. Alain Joseph Kevin O’halloran
AcknowledgementsSolar Air Conditioner•Introduction•Design•Conclusion
6 December 2011Team 8Slide 26
Absorption Refrigeration Services of Canada Dave Fraser
Efficiency Nova Scotia
Shell
Questions?