EML 4304L Thermal Fluids Lab Thermal Conduction Experiment # 3PowerPoint PresentationPURPOSETesting Equipment For ExperimentsSlide 5Slide 6Slide 7Slide 8Slide 9Slide 10Slide 11UNIT #3UNIT #4Slide 14Slide 15Slide 16Units #1 and #2Heat SinksDrain Tube Flow Rate CalculationsSlide 20Slide 21CalculationsSlide 23Slide 24Slide 25Slide 26Slide 27Slide 28ErrorsEML 4304L Thermal Fluids Lab Thermal ConductionExperiment # 3EML 4304L Thermal Fluids Lab Thermal ConductionExperiment # 3Mechanical Engineering Department FAMU/FSU College of EngineeringMechanical Engineering Department FAMU/FSU College of EngineeringOutline•Purpose of the lab•Testing Equipment• The types of equipment setup•Units 3 and 4•Units 1 and 2 • Additional components•Heat sinks•Drain tubes• Calculations Needed for ExperimentPURPOSE•Conduct a series of thermal conduction experiments which examines the effects on heat transfer with varying cross-sectional area and distance. –Using this thermal conduction information derive Fourier’s law of thermal conduction.•Analyze the temperature variance in a series of metal rods that are in physical contact. –From this information determine thermal resistance and contact resistance.Mechanical Engineering Department FAMU/FSU College of EngineeringTesting EquipmentFor ExperimentsTesting EquipmentFor ExperimentsMechanical Engineering Department FAMU/FSU College of EngineeringMechanical Engineering Department FAMU/FSU College of EngineeringAdjusting knobsTemperature Recorder Units1-4Drain tubeMechanical Engineering Department FAMU/FSU College of EngineeringThermocoupleSelector1-10Unit Selector1-4On/Off Switches for Units 1-4Mechanical Engineering Department FAMU/FSU College of EngineeringTemperature adjustor forUnits 3-4Mechanical Engineering Department FAMU/FSU College of EngineeringDigital TemperatureIndicator (ºF)Equipment for Thermal Conduction Test Units #3 and #4Equipment for Thermal Conduction Test Units #3 and #4Mechanical Engineering Department FAMU/FSU College of EngineeringMechanical Engineering Department FAMU/FSU College of EngineeringHeat flowfor units 3 and 4Mechanical Engineering Department FAMU/FSU College of EngineeringHeat flowfor units 3 and 4 Notes: Do NOT adjust the flow valves.UNIT #3x2 x1T1T2Q=KA*ΔT/ΔxK = coeff. of therm. conductivityNOTE: K is unknown and must be determinedMechanical Engineering Department FAMU/FSU College of EngineeringUNIT #4x2 x1T1T10Q=KA*ΔT/ΔxK = coeff. of therm. conductivityNOTE: K is unknown and must be determinedMechanical Engineering Department FAMU/FSU College of EngineeringEquipment Thermal Resistance and Contact Resistance Test Units #1 and #2Mechanical Engineering Department FAMU/FSU College of EngineeringMechanical Engineering Department FAMU/FSU College of EngineeringHeat flowfor units 1 and 2Mechanical Engineering Department FAMU/FSU College of Engineeringelements are enclosed in the insulating jacket. Figure1 illustrates the schematics of the apparatus. The dimensions of the tapered rod are indicated in Fig. 2.elements are enclosed in the insulating jacket. Figure1 illustrates the schematics of the apparatus. The dimensions of the tapered rod are indicated in Fig. 2.elements are enclosed in the insulating jacket. Figure1 illustrates the schematics of the apparatus. The dimensions of the tapered rod are indicated in Fig. 2. Heat flowfor units 1 and 2Units #1 and #2 Cu (Al)Contact ResistanceT1T10x1x2Stainless SteelSteel (Mg)Mechanical Engineering Department FAMU/FSU College of EngineeringHeat Sinks•One water cooled heat sink is located on each unit•Units #1 and #2 they are located at extreme end of the assembly away from the heat source•Units #3 and #4 are located on the top of each unit•The heat sinks will be used to determine heat lost by each unit.•Q=mwCp(ΔT)Mechanical Engineering Department FAMU/FSU College of EngineeringDrain Tube Flow Rate CalculationsDrain Tube Flow Rate CalculationsMechanical Engineering Department FAMU/FSU College of EngineeringMechanical Engineering Department FAMU/FSU College of EngineeringDrain tubes leadingfrom heat sinksMechanical Engineering Department FAMU/FSU College of EngineeringGraduated cylinderto measureflow rateDrain tubeAlso will needa stopwatchto time fluidflowCalculationsCalculationsMechanical Engineering Department FAMU/FSU College of EngineeringMechanical Engineering Department FAMU/FSU College of EngineeringConservation of Energy(in a perfect world)qin = q out CalculationsConservation of Energy(in our world)qin = Cq out Where C is a constant which represents any losses not accounted for.Units #1 and #2Stainless Steel Cu (Al)Steel (Mg)Heat InHeat SinkQ=mwCp(ΔT)Qout=QinRt,c= ΔT/QMechanical Engineering Department FAMU/FSU College of EngineeringMechanical Engineering Department FAMU/FSU College of EngineeringCalculationsThermal Contact ResistanceRt,c = Thermal contact resistanceT = Temperature change q = Heat fluxRTqt c,UNIT #3x2 x1Qout QinQ=mwCp(ΔT)Qout=QinQ=KA ΔT/ΔxMechanical Engineering Department FAMU/FSU College of EngineeringMechanical Engineering Department FAMU/FSU College of Engineering(1) – Rate of heat flow at the sinkmw = mass of cooling water displaced in time tCp = Specific heat of water at constant pressureT = (Tout - Tin) of cooling watert = time required to displace a volume Vw of water(2) – Relationship between heat flow and temperature differenceK = proportionality constantA = cross-sectional areaT = temperature difference of the materialx = distancetTCmqpwq KATx(1) (2)CalculationsCalculations•Q=KA ΔT/Δx Q=-KA dT/dx•dT/dx = temperature gradientxTdT/dxMechanical Engineering Department FAMU/FSU College of EngineeringErrors•TimeFlow rateSteady State•Heat LossesNot perfectly insulatedMechanical Engineering Department FAMU/FSU College of