Effects of Air Flow and Heating on Temperature: Experiment

assembles of im discover Flow and change on Temperature ExperimentOBJECTIVETo study the Air Flow act on Temperature changes.To study the raise uping Effect on Temperature changes.To study the Effect of Air Flow and Heating on Temperature changes.INTRODUCTIONThe purpose of this sample is to investigate the effects of bearing decrease or affectionatenessing on temperature. An enclosed epithelial duct (Model LS17024) is used as assistance to complete our task. The indicate of toughenedting the entire component in enclosures is to prevent unnecessary problems during mark off design, transport incline and effect of rut process. The enclosed duct is make up by several components which include lover, swan panel, cool offer sectionalization, card door, condensing unit, and dry bulb thermocouple. rooter functions to provide nervous strain flow govern and there give be a comptroller inst exclusivelyed on it in order to adjusting the spinning speed. Control panel was co nnected to that controller on fan as well as warmheartednesser to control both variables railway line flow rate and the thaw rate.Next, temperature is defining as one of the most important argument because it represents the motion of particles. The air molecules induce more nil on average (move hurried and bounce rough more ener seduceic eithery) when the temperature increases as the result of high thawing rate. In this experimentation, the air flow and warmnessing rate alter the temperature changes.Furthermore, heat ecstasy in three principal(prenominal) ways finished radiation, conductivity, and natural or squeeze convention. Heat transfer via radiation occurs by means of electromagnetic waves, an example beness the suns energy hit the earth with including emissivity and energy absorption. in like manner that, heat end also be transferred through conduction between the inner come to the fore and surfaceer surface of an intention. As long as it is conducted by heat energy, the heat will flow from tropicter region to disdain region. For example, there is only one residual of squeeze rod existence heat by squeeze outdle, and sooner or later the other supplant of the rod will become warmer. This phenomenon is a common heat conduction example which explained the heat energy can transfer through particles in one object. Doesnt like heat conduction, heat convection happened between particles in fluid and non-fluid. Just like we can feel the heat of the animated iron plate once we get near to it even no contact at all. It is because the particles in iron plate pass the heat energy to air molecules in meet and the air molecules carry out heat convection again from air molecules onto our detector cells on our body.MATERIAL/ apparatus1. An enclosed duct (Model LS17024) 2. Fan 3. Control panel 4. Cooler section 5. Observation door 6. Condensing unit 7. Dry bulb thermocoupleEXPERIMENTAL PROCEDUREControl State of the DuctThe apparatus ma in power supply was switched on.The placement was throw in the toweled to r individually immobile disk operating system whereby all renditions on the instrument panel show no more changes. all the readings displayed on the digital meters were recorded in Table 1. bankrupt A Air Flow Effect on TemperatureThe axial fan was switched on. The oftenness was set to 5.0Hz by adjusting the absolute frequence inverter.The system was allowed to reach steady state whereby there were no more changes in duct temperature.All the readings displayed on the digital meters were recorded in Table 1.All the above travel were retell with frequency of 30.0Hz.The readings were recorded deplete in the Table 1 for different air flow rates 5.0Hz and 30.0Hz by adjusting fan frequency.Part B Heating Effect on TemperatureThe heater was switched on and the heating rate was set to 40.0C.The system was allowed to reach steady state whereby no observable changes in heater and duct temperature.All the read ings displayed on the digital meters were recorded in Table 1.All the above move were repeated with heating rate of 60.0C.The readings were recorded down in the Table 1 for different rates 40.0C and 60.0C.Part C Effect of Air Flow and Heating on TemperatureHeating rate of 31.0C and a fan rate of 5.0Hz, and another set with heating rate of 31.0C and fan rate of 30.0Hz were selected to study their combined effect.The system was allowed to reach steady state whereby no observable changes in the duct temperature.All the readings displayed on the digital meters were recorded in Table 1.RESULTSDISCUSSIONThe purpose of this experiment is to study the effects of heating and air flow on temperature. The more kinetic energy inside an object particles cause vigorous striking which indicates that more heat been transferred from it. For sure it gives rise in temperature. Temperature is a parameter to measure the amount of thermal energy in one object based on the kinetic action between the par ticles. Air is do up of molecules that are constantly in motion. Once air is being warmed up, the molecules will gain energy to increase its mobility. The molecules will wherefore collide to each other to cause effective collision. A high(prenominal) temperature indicates more thermal motion between particles. So as return, a decrease in temperature will slow the movement of particles down. Fan frequency and heating rate are two factors that will alter the temperature changes. The faster the air flow rate, the more readily the surface cools as air forming a edge work is re behindd and the temperature measured in the area is retained low.Heat transfer in three main ways through radiation, conduction, and natural or labored convention. Heat transfer via radiation occurs through electromagnetic waves, an example being the suns energy reaching the earth with including emissivity and energy absorption. Besides that, heat can also be transferred through conduction between the inner surface and outer surface of an object. As long as it is conducted by heat energy, the heat will flow from hotter region to lower region. For example, there is only one end of iron rod being heated by candle, and sooner or later the other end of the rod will become warmer. This phenomenon is a common heat conduction example which explained the heat energy can transfer through particles in one object. Doesnt like heat conduction, heat convection happened between particles in fluid and non-fluid. Just like we can feel the heat of the hot iron plate once we get near to it even no contact at all. It is because the particles in iron plate pass the heat energy to air molecules in surrounding and the air molecules carry out heat convection again from air molecules onto our sensor cells on our body.One of the criteria for heat transfer to occur is temperature difference. As we all know, the heat will only transfer from hotter region to cooler region. jibe to First Law of Thermodynamic, th e heat energy transferred from cooler place to hotter place is impossible. For convection, the rate of heat loss depends on the speed of close air flow above the surface. There will be an insulating boundary layer of warm air forming against the surface as the object surface heats the air around it. Moving air will destroy the boundary layer, let the new cold air in and replace the original hot air. That is why the duct temperature is getting lower as the fan frequency goes higher. There are two types of convective heat transfer which are forced convection and natural convection. Forced convection was happened when there is external force existed for example Fan is considered as external force since it provides air flow. Forced convection can transfer faster heat rate compared to natural convection due to the stronger air flow rate which speed up the moving air that carries the heat energy. Furthermore, the temperature increases behind for natural convection because heat energy is transferred in natural condition.At the former(a) state of experiment, heater and fan were switched off so that we can find out the initial reading of all temperature gauges. The duct, heater and surrounding / ambient temperature were state as 30.0 C, 30.0 C and 30.0C respectively. This set of data is the controlled set in this experiment. In part B experiment, the fan frequency was initially set to 5Hz. The results came out for duct, ambient and heater temperature were 29.9 C, 29.9C, 30.0 C respectively. After this, we need to watch for the whole component to stabilize (cool down) before carry out side by side(p) set of part A experiment. Next, the fan frequency was reset to 30Hz. The duct, ambient and heater temperature were recorded 29.8 C, 29.9 C and 30.0 C respectively. From the result, we can conclude that the duct temperature is getting low as we increase the fan frequency. This is fan has fabricate a force convection with disrupt all the insulating boundary layer and al low the new and cooler air to come into enclosing duct. For part B experiment, the heating rate was initially set to 40 C. The duct and ambient temperature came out as 31.1 C and 30.1 C. After that we repeat the cooling down process as what we did in part B experiment for system stabilization, the heating rate was then reset to 60 C. The duct and ambient temperature were recorded as 35.5 C and 30.9 C .The readings prove that the duct temperature had rosiness compared to last set experiment. This is because the particles in air gained greater kinetic energy and collides with each other faster, causing an increase in temperature. In part C experiment, both fan and heater were involved. In first tally (first condition), we had the combination of 5Hz fan frequency and 31.0 C of heater temperature. The duct and ambient temperature came out as 31.0 C and 30.6 C. Again the system needed to be stabilized in order to get more accurate reading for next part. For second trial (second conditi on) we made the condition as 30Hz fan frequency and 31.0 C of heater temperature together. The duct and ambient temperature were recorded as 30.9 C and 30.6 C. The data proves that the duct temperature in second trial is higher than that in first trial. This is because the air flow has again destroyed the insulating boundary layer and the heating rate cant counter with move into of new cold air.In conclusion, there is few precaution steps need to be taken throughout the whole experiment. Firstly, the temperature should be adjusted from low temperature reading to high temperature reading so that the remained heat wint affect the next coming set. Next, this experiment should be conducted in a closed room and located far away from heating or cooling system so that the temperature wont be easily affected.CONCLUSIONThe objective of the experiment which is to study the effects of heating and air flow on temperature was successfully determined. Air flow rate and heating rate are the mai n factors that affect the temperature. In this experiment, heat transferred by using convection. Fan was acting as forced convection which alters the fastness of moving air to disrupt the insulating boundary layer to allow the cool air to replace the original warm air. When heater was switched on, air is heated and expands. The molecules in warm gained greater kinetic energy and collide with each other faster, causing an increase in temperature.REFERENCESConvection. (n.d). Retrieved March 20, 2014 fromhttp//hyperphysics.phy-astr.gsu.edu/hbase/thermo/heatra.htmlEffects of Heat and Airflow inside an Enclosure. (n.d). Retrieved March 20, 2014 from http//www2.emersonprocess.com/siteadmincenter/PM%20DeltaV%20Documents/Whitepapers/WP_Heat_Airflow_Encl.pdfJain,R. (n.d). Heat Transfer. Retrieved March 20, 2014 from http//www.budind.com/pdf/BasicsofEnclosureCoolingWhitePaper2.pdf