Team # 1 김승환, 이인선, 유형석, 이상헌, 권대호, 김재준 2 김필서, 김형진, 김혜진, 나예은, 송문원, 윤덕화 3 이민석, 정충순, 김지응, 김현태, 정종희, 이인효 4 류동민, Ahmed Salem, Salem Mubarak, Al Momani Bela, 김제곤, 김보경 NQE 401 : EXPERIMENTAL CLASS  Classroom : N7-1 #1402 ( & #1409 )  Time : 2:00 (PM) ~  The Instruction and Explanation of An Experiment. (about 30 min)  Experiment - Group 1  Experiment - Group 2 Students are divided into 4 teams and 2 teams are 1 group. One group would do experiment at the same time but parallelly.

EXPERIMENTAL CLASS 1. TEMPERATURE MEASUREMENT

EXPERIMENT 1. TEMPERATURE MEASUREMENT  Temperature Measurement is possible via only indirect methods, using the change of physical properties of measuring apparatus;  The pressure of gases  The expansion of material (e.g. Mercury)  The resistance of metals  Various Temperature Measuring Apparatus  Alcohol Thermometer / Mercury Thermometer,  Thermocouple  Resistance Temperature Detector  Infrared Thermometer

EXPERIMENT 1. TEMPERATURE MEASUREMENT  Temperature Measurement in Nuclear Power Plant  The temperature of the most critical and important points in nuclear power plants are measured with RTDs(16-32 per plant) and partly thermocouples.  The requirements of the devices in Nuclear Power Plant  High resistance to Nuclear grade(LOCA, seismic, radiation, etc.)  20 years life  <0.3°C accuracy  4~8 second response time

EXPERIMENT 1. TEMPERATURE MEASUREMENT  Thermocouple(TC)  TC is consisting of two dissimilar conductors that contact each other at one or more spots, where a temperature differential is experienced by the different conductors (or semiconductors).  It produces a voltage when the temperature of one of the spots differs from the reference temperature at other parts of the circuit

EXPERIMENT 1. TEMPERATURE MEASUREMENT  Types of Thermocouple  According to the Materials used ; Nickel alloy thermocouples, Platinum/rhodium alloy thermocouples, Tungsten/rhenium alloy thermocouples and so on  According to the types of junction ;

EXPERIMENT 1. TEMPERATURE MEASUREMENT  Resistance Temperature Detector (RTD)  Using the relationship between the electrical resistance of metals and temperature

 TC vs RTD EXPERIMENT 1. TEMPERATURE MEASUREMENT TCRTD Range68K ~ 2500 K (Generally, maximum 1500K) 68~1000 K (Generally maximum 300~500C) Response TimeRelatively fastRelatively slow Accuracy (error)Less than 2ºCLess than 0.3ºC PriceFrom 35$From 130$

EXPERIMENT 1 : TEMPERATURE MEASUREMENT WITH THERMOCOUPLE

EXPERIMENT 1. TEMPERATURE MEASUREMENT  1. Pre-Test procedure :  Preparation of 50ml of hot water and 50ml of cold water  Measure the initial temperature of each water (hot/cold water) * Measure cold water temperature first.  Mix up the cold and hot water (to be called the 3 rd water)  Measure the 3rd water temperature  Record the results

EXPERIMENT 1. TEMPERATURE MEASUREMENT  2. Main-Test procedure :  Prepare two different thermocouples (thin/thick thermocouples).  Prepare a 100ml hot water. (assuming that volume of water is 100mL)  Measure the hot water temperature with two thermocouples at once every 5 secon ds for 2 minutes.  Record the results

EXPERIMENT 1. TEMPERATURE MEASUREMENT  3. Results and discussions should involve followings.  [Pre-Test] Measured 3th water temperature.  [Pre-Test] Comparison between theoretical temperature and measured temperature and reasons for the difference.  [Main-Test] Temperature profile of thick and thin TCs.  [Main-Test] Discussions on why two measured temperature are different.