PowerPoint Presentation

ET 493 Senior Design Spring 2013By: Justin Cifreo, Benjamin Gabriel, Nathan TaylorInstructor: Dr. Cris KoutsougerasAdvisor: Dr. Junkun MaMechanical Engineering TechnologySoutheastern Louisiana UniversitySOLAR POWERED HVAC SYSTEM 1PURPOSE The objective of this project is to research and design a solar heating, ventilation, and cooling system that will reduce Southeastern Louisiana Universitys energy consumption.2

PROJECT SITEFuture location of Southeasterns Sustainability Center

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Overlay of System on Site6

CURRENT CONDITIONPresent HVAC system in use

7GREENHOUSESCurrently use propane fueled convection heaters

8CHALLENGESHeat Load Calculation

Ventilation Flow Rates

Chiller Size Availability

Duct Design

Control Design

Unknowns 9

Solar Panels SelectionManufactured by SchucoSolar Thermal PanelsArray of 5 PanelsMixture of Propylene 79.2% Efficiency Rating Glycol and Water

10SOLAR ABSORPTION PANEL

11COMSOL PROTOTYPE12

SOLAR PANEL MOUNTING STRUCTURE

13HEAT EXCHANGERSManufactured by Schuco Plate-Style heat exchangersTransfer heat gathered by propylene glycol to water

14HOT WATER STORAGE TANKManufactured by Lochinvar1,000 Gallon CapacityProvides latent heat storage

15CHILLER CHARACTERISTICSAdsorption

Silica gel

Efficiency

Operating Temperatures

Operating Conditions

16CHILLER CHARACTERISTICS cont.Environmentally friendlyTemperature rangeNoiseSmall electricity consumptionDurabilityMaintenance Lifespan

17CHILLER EFFICIENCY

18CHILLER SIZE

19COOLING TOWER AND PONDUtilization of a cooling tower with the adsorption chillerAssists in cooling process of the chiller condenser

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EXTERIOR GEOTHERMAL HEAT SINK

21HEAT LOSSTwo types of building materialConcrete Masonry Units (CMUs)Nominal size 1688 inchInsulated Metal Panels (IMPs)26 gauge metalInsulation 22

WALL AREA DIAGRAMU valuesmaterial

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EXCEL SPREADSHEET CALCULATIONS

24DUCTING DESIGNCFM Flow RatesFluctuation PositiveNegative 25

I/0 CONTROL LOGIC

26OVERALL SYSTEM CONTROL

27OVERALL SYSTEM CONTROL28

OVERALL SYSTEM CONTROL29

DELIVERABLES/ SOLUTIONSResearched 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 30DELIVERABLES 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 COMSOLDesign system control layout and flow charts for system

31DELIVERABLES 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 #

32DELIVERABLES Cont.Calculate convection flow rate in green houses #Specify control components and locations according to specifications #Calculate total efficiency of system #Complete system specification #

33TIMELINE1/25System introductory meeting with Mr. Byron Patterson and Dr. Junkun Ma, obtained floor plan and area measurements1/28Solar HVAC systems researched1/30Researched different solar energy collector units, selected rough schematic system diagram 2/1Collected height measurements at project site, calculated volumes for heat calculations 2/6Visio schematics constructed to present to Mr. Byron2/7Meeting with Dr. Ma, discussed system components and operations of components34TIMELINECont.2/27Brainstorming meeting Mr. Byron, Dr. Ma, Dr. Rode3/6Biology building system walkthrough 3/8Calculate total heat of each volume section, learn heat flow analysis, take pictures Biology Building3/13Meet with Byron to solidify specifications3/14Calculate and analyze individual system components3/20Meet with Byron and Dr. Ma to get input and take next step in design35TIMELINECont.3/27Discussed back tracking, heat load and general duct work design4/11Researched duct work and sizing along with heat load factors4/18Created excel spreadsheet4/20Collected wall, window, and equipment loads5/3Calculate Total Heat Load 5/10Set up Sensors ( Humidistat, Thermometer)36TIMELINECont.Summer/ FallObtain and Learn Manual J for heat loadSummer/ FallObtain and Learn Manual S for equipment selection

Summer/ FallObtain and Learn Manual D for duct designSummer/ FallObtain and Learn Manual T for duct design

Summer/ FallAnalyze system design compared to available system componentsSummer/ FallControl 37REFERENCES38Engineeringtoolbox.comModern Refrigeration and Air Conditioning 18th editionShuco USALochinvar CorporationAdsorptionchiller.comManual J: Calculating Heat Losses, Manual 3, Sixth Edition39