This question Question 1:-Explain the effect of the air velocity on the heat transfer by convection.-Explain the effect of extended surface on heat transfer by convection.-Which is the most effective plate in heat convection among the three platesused in this experiment justify your answer.-Discuss the errors and their sources which might occurred in this experiment and affected its results Forced ConvectionObjectives:Demonstration of the relationship between Power input and Surface TemperatureconvectionforcedDescription:The H111P Free and Forced convectionfrom Flat Finned and Pinned Platesenables students to investigate heattransfer from various surfaces in free andforced convection.The range of heated plates demonstratesthe effect of extended surfaces (fins andpins) on the rate of heat transfer. TheH111P is designed to be used with, and tobe installed alongside, the Heat TransferService Unit H111.8The accessory comprises a rectangularduct (6) mounted on the discharge of abase mounted centrifugal fan. In the middleof the duct is an air velocity sensor (5) thatallows the air velocity within the duct to bemeasured and displayed (meters/second)on the air velocity display (4) below thebase. At the centre of the duct is anaperture that allows any of the three heatedplates (8) supplied to be installed.5671.2.Main SwitchInstrument Fuse3.Fan SwitchAir Velocity Display (m/s)Air Velocity Sensor(Hot WireAnemometer)4.5.6.Duct7.T9 Air Temperature48.Heated Plate239.Air ThrottleFigure 1: SCHEMATIC DIAGRAM H111Plof 6Work sheetLaboratoryHeat Transfer-MENG 420LExperimentH4Unit: H111PForced ConvectionA flat plate, pinned plate, or finned plate heat exchanger may be installed in the ductand secured by two toggle clamps. Each exchanger incorporates an electric heatermat rated at 100w at 240V. Each of the heated plates incorporates thermostaticprotection against overheating.The heater surftace temperature (T1) is continuously monitored and displayed by thetemperature indicator when plugged in to the console.The Pinned plate is fitted with three extra thermocouples (T3, 4 and 5) to measurethe temperature of extended surfaces. T5 is furthest from the heater.The Finned plate is fitted with three extra thermocouples (T6, 7 and 8) to measurethe temperature of extended surfaces. T8 is furthest from the heater.The T9 air temperature (7) sensor is located at the base of the duct and records thetemperature of the air flowing over the heated plate.Thermocouple attachment points on the heat exchangers are protected by a coveringof adhesive.The air velocity passing the heated plates can be varied from zero to more than 8m/sdepending upon the local mains voltage and supply frequency. The air velocitysensor (5) is permanently mounted in the duct and connects to the console belowusing a line plug and socket.The air velocity is controlled by the use of an intake air throttle (9). For naturalconvection experiments, the fan may be switched off using the fan switch(3) on theH111P console.All thermocouples are 'Duplex'. The primary set of thermocouples terminates with aminiature plug (identified T1, and T3 to T8) for insertion into the control consolesockets.The secondary set of thermocouples terminates with 2-way edge-connectors suitablefor the Hilton DataAcquisition Uparade is installed. The panel mounted socket labeled 'T1 out providesonal HC111A Data

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given;
(a) explain the effect of the air velocity on the heat transfer by convection.
(b) explain…

Question 1: -Explain the effect of the air velocity on the heat transfer by convection. -Explain the effect of extended surface on heat transfer by convection.