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Solar Thermal Air Conditioner. Design Team 8. Introduction. Solar Air Conditioner Introduction Design Conclusion 6 December 2011 Team 8 Slide 2. Team 8: Chris DesRoches Patricia Duncan James Mills Amanda Wiseman Supervisor: Dr. Dominic Groulx. Outline. Introduction Background

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Presentation Transcript

Introduction
Introduction

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 2

Team 8:

  • Chris DesRoches

  • Patricia Duncan

  • James Mills

  • Amanda Wiseman

    Supervisor:

  • Dr. Dominic Groulx


Outline
Outline

  • Introduction

    • Background

    • Problem Definition

  • Design

    • System

    • Calculations

  • Conclusion

    • Future Work

    • Testing

  • Acknowledgements


Background information
Background Information

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 4

Figure 1: Energy Use in a Typical Home

Source: http://www.energystar.gov/index.cfm?c=products.pr_pie


Background information1
Background Information

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 5

Figure 2: Average Annual Solar Insolation in NS

Source: http://www.nlcpr.com/solar_install.php


Problem definition
Problem Definition

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 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 selection
Design Selection

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 7


Design
Design

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 8

  • Cooling System Components

    • Generator

    • Condenser

    • Evaporator

    • Absorber


Design1
Design

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 9


Design2
Design

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 10


Design3
Design

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 11


Design4
Design

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 12

  • Air Conditioning Process


Design5
Design

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 12

  • Ammonia Solubility in Water


Hysis simulation
HYSIS Simulation

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 13

  • Peng-Robinson cubic equation of state model approximation


Heat transfer calculations
Heat Transfer Calculations

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 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 design
Absorber Design

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 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 design
Condenser Design

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 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 design
Evaporator Design

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 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
Generator Calculations

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 18

  • Heat transfer coefficients in coiled tube:

  • Overall heat transfer and area required:


Generator design
Generator Design

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 19

  • Generator

    • Helical-coil heat exchanger was selected

    • Length: 12 in

    • Materials: Steel, Copper, R-12 polystyrene insulation


Safety
Safety

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 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


Budget
Budget

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 21

  • 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 work
Future Work

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 22

  • Fabrication and assembly of system

  • Continuous improvements to design where applicable

  • Testing of air conditioner performance


Testing
Testing

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 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


Conclusion
Conclusion

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 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


Acknowledgements
Acknowledgements

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 25

  • Dalhousie University

    • Faculty of Mechanical Engineering

    • Dr. Dominic Groulx

    • Dr. Julio Militzer

  • NSCC

    • Dr. Alain Joseph

    • Kevin O’halloran


Acknowledgements1
Acknowledgements

Solar Air Conditioner

Introduction

Design

Conclusion

6 December 2011

Team 8

Slide 26

  • Absorption Refrigeration Services of Canada

    • Dave Fraser

  • Efficiency Nova Scotia

  • Shell



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