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SOLAR POWERED HVAC SYSTEM

SOLAR POWERED HVAC SYSTEM. ET 493 Senior Design Spring 2013 By: Justin Cifreo, Benjamin Gabriel, Nathan Taylor Instructor: Dr. Cris Koutsougeras Advisor: Dr. Junkun Ma Mechanical Engineering Technology Southeastern Louisiana University. PURPOSE.

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SOLAR POWERED HVAC SYSTEM

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  1. SOLAR POWERED HVAC SYSTEM ET 493 Senior Design Spring 2013 By: Justin Cifreo, Benjamin Gabriel, Nathan Taylor Instructor: Dr. Cris Koutsougeras Advisor: Dr. Junkun Ma Mechanical Engineering Technology Southeastern Louisiana University

  2. PURPOSE • The objective of this project is to research and design a solar heating, ventilation, and cooling system that will reduce Southeastern Louisiana University’s energy consumption.

  3. PROJECT SITE • Future location of Southeastern’sSustainability Center

  4. Overlay of System on Site

  5. CURRENT CONDITION • Present HVAC system in use

  6. GREENHOUSES • Currently use propane fueled convection heaters

  7. CHALLENGES • Heat Load Calculation • Ventilation Flow Rates • Chiller Size Availability • Duct Design • Control Design • Unknowns

  8. Solar Panels Selection • Manufactured by Schuco • Solar Thermal Panels • Array of 5 Panels • Mixture of Propylene • 79.2% Efficiency Rating Glycol and Water

  9. SOLAR ABSORPTION PANEL

  10. COMSOL PROTOTYPE

  11. SOLAR PANEL MOUNTING STRUCTURE

  12. HEAT EXCHANGERS • Manufactured by Schuco • Plate-Style heat exchangers • Transfer heat gathered by propylene glycol to water

  13. HOT WATER STORAGE TANK • Manufactured by Lochinvar • 1,000 Gallon Capacity • Provides latent heat storage

  14. CHILLER CHARACTERISTICS • Adsorption • Silica gel • Efficiency • Operating Temperatures • Operating Conditions

  15. CHILLER CHARACTERISTICS cont. • Environmentally friendly • Temperature range • Noise • Small electricity consumption • Durability • Maintenance • Lifespan

  16. CHILLER EFFICIENCY

  17. CHILLER SIZE

  18. COOLING TOWER AND POND • Utilization of a cooling tower with the adsorption chiller • Assists in cooling process of the chiller condenser

  19. EXTERIOR GEOTHERMAL HEAT SINK

  20. HEAT LOSS • Two types of building material • Concrete Masonry Units (CMUs) • Nominal size 16×8×8 inch • Insulated Metal Panels (IMPs) • 26 gauge metal • Insulation

  21. WALL AREA DIAGRAM • U –values • material

  22. EXCEL SPREADSHEET CALCULATIONS

  23. DUCTING DESIGN • CFM Flow Rates • Fluctuation • Positive • Negative

  24. I/0 CONTROL LOGIC

  25. OVERALL SYSTEM CONTROL

  26. OVERALL SYSTEM CONTROL

  27. OVERALL SYSTEM CONTROL

  28. DELIVERABLES/ SOLUTIONS • Researched existing solar heating and cooling systems on the market  • Came up with a theoretical solar HVAC system schematic  • Measure interior volumes of all facility spaces for heat load calculation  • Measure area of exterior walls for heat values  • Measure windows and doors for heat values  • Log present and future equipment for heat gains 

  29. DELIVERABLES Cont.… • Obtain heat load and flow rate equations  • Make excel spreadsheet for heat load calculation and flow rate analysis  • Research heat exchangers and design simple heat exchanger in COMSOL  • Research duct flow rate calculation, material selection, and geometry specifications  • Design and analyze simple solar heating panel in COMSOL • Design system control layout and flow charts for system 

  30. DELIVERABLES Cont.… • Calculate U values for heat losses and gains through exterior walls # • Calculate U values for students # • Calculate U values for equipment and miscellaneous # • Calculate total heat load for cooling # • Calculate total cooling load for winter # • Calculate positive and negative CFM rates for all rooms # • Calculate and design ducting system #

  31. DELIVERABLES Cont.… • Calculate convection flow rate in green houses # • Specify control components and locations according to specifications # • Calculate total efficiency of system # • Complete system specification #

  32. TIMELINE

  33. TIMELINECont.

  34. TIMELINE Cont.

  35. TIMELINE Cont.

  36. REFERENCES • Engineeringtoolbox.com • Modern Refrigeration and Air Conditioning 18th edition • Shuco USA • Lochinvar Corporation • Adsorptionchiller.com • Manual J: Calculating Heat Losses, Manual 3, Sixth Edition

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