Q1/ Estimate the hot junction temperature for a cooper wires are used in the micro thermopile show in fig (1) when the cold junction is maintained as room temperature, if the seebeck coefficient is 38.74 uV/e and the voltage output is 2.18mv Fig 1 Thermocouples Cold Junction Region, T. Hot Junction Region, T
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- A thermocouple has an output emf as shown in the following table when its hot (measuring) junction is at the temperatures shown. Determine the sensitivity of measurement for the thermocouple in mv/"C. Temperature (C) 3.5 13 4 12 Voltage imv) Sensitivity, SThe term dT/dx Where T is temperature and x is length, in Fourier law conduction, is called Temperature GradientRequired to answer. Single choice. OPTIONS: 1.May be 2.May not be 3.True 4.FalseQUESTION 2 SOALAN 2 Temperature sensing was the initial COVID-19 detection process to isolate people with a temperature, who may have had the virus, from others. Healthcare facilities including hospitals and clinics and other locations frequently used and continue to use non-contact thermal sensing as a precautionary step to prevent the spread of the virus. Based on the statement above, sketch the construction diagram and apply the system for another industrial application and give the reasons.
- Pleas very fast Determine the resistance of a copper wire that has a cross-sectional area as 9.2 mm2. The length and the electrical resistivity of the copper wire are 78.7 m and 1.67 x 10-6 Ωm. The resistance of a copper wire (in Ω)For a slab with thickness 2 cm, the temperature is maintained at To and I at x = 0 and x = L. When I, -40 °C and I₁ = 60 °C, a heat flux sensor measures the magnitude of the heat flux as 40 W/m². Assume that the thermal conductivity k is a linear function of temperature. a) If, when T₁ -40 °C and T₁ = 80 °C, the same heat flux sensor measures the magnitude of the heat flux as 80 W/m², what is the temperature dependence of k? b) If, when To=40 °C and T₁ = 80 °C, the same heat flux sensor measures the magnitude of the heat flux as 100 W/m², what is the temperature dependence of k? c) If, when T₁ -40 °C and T₁ = 80 °C, the same heat flux sensor measures the magnitude of the heat flux as 60 W/m², what is the temperature dependence of k?30_ Select the correct statement for a radial conductivity exp Select one: a. The mid outer surface represent the heating area while the side surface represent the cooling area b. None of them is true c. The outer section represent the heating area and the inner section represent the cooling area d. The inner section represent the heating area and the outer section represent the cooling area 24_ The device with highest static head loss is Select one: a. No static head loss in this experiment b. Venturi meter c. Orifice plan d. Rotameter 26_ If surface is not leveled under the center of pressure tank Select one: a. Legs of the device can be rotated to create level surface b. Items should be added under the device to create level surface c. The device has and auto leveling d. none
- Annealing is a critical process in semiconductor manufacturing where silicon wafers get rapidly heated to get temperatures using powerful infrared heaters. Annealing helps to reduce defects in materials after implantation or deposition processes. a) You have been asked to design a temperature sensor an annealer with a range of up to 1500°C.Select a suitable thermocouple from the table below and give an explanation for your choice. 80 E 70 60 K 50 40 -C 30 20 10 0. 500 1000 1500 2000 2500 Temperature ("C) b) To record the temperature, you use a microcontroller with an ADC. The ADC is referenced to a 2.048V reference voltage source. To make use of the entire range of the ADC, what gain does the amplifier require for your chosen Thermocouple? c) You want to read the temperature with a resolution of 0.5°C. What is the minimum number of bits that your ADC requires? d) The thermocouple has a time constant, t, of 300ms. If the annealer heats from room temperature (20°C) to 820°C. What…The engineers at Massachusetts Institute of Technology and Harvard University have designed a novel face mask that can diagnose the wearer with Covid-19 within about 90 minutes. The masks are embedded with tiny, disposable sensors that can be fitted into other face masks and could also be adapted to detect other viruses. a) Source: https://news.mit.edu/2021/face-mask-covid-19-detection-0628 (i) The new wearable sensors and diagnostic face mask are designed as a part of Internet of Things (loT) with its essential elements (i.e., unique identity, intelligence and communication). Briefly describe the capability of each element in this scenario, with examples. (ii) Explain TWO (2) new IoT product (i.e., face mask with sensors) resources / activities created based on the newly designed face mask with examples.The output of a potentiometer is to be read by a recorder of 10,000 ohms input resistance. Nonlinearity must be held to 1 percent. A family of potentiometers having a thermal rating of 5 watts and resistances ranging from 100 to 10,000 ohms in 100- ohm steps is available. Choose from this family the potentiometer that has the greatest possible sensitivity and also meets the other requirements. What is this sensitivity if the potentiometers are single-turn (360°) units?
- % Power T 53.8 T2 D= 5cm D= 7cm D = 9cm 28 50% 46 27.5 41.1 27 D= 1lem 40.6 21.9 D = 5cm 78 31.5 69 70% D= 7cm D= 9cm 30.1 67 29.8 D= 1lcm 63 28.1 е. Calculations: Determine heat exchange between two black plates Q by using: q= T1: temperature of the first black plate (K). T2: temperature of the second black plate (K). A: area of plate= 0.026 m And then plot the heat exchange between two black plates versus distance between these plates at different power: DA window measures 36 inches x 50 inches and there are 20 of these windows in a structure. The U-factor for this single pane metal window is 1.3 Btu/hr-ft2-oF. U-factor is the conduction factor (and thus the reciprocal of an R-factor) and is equal to conductivity of the material k over the conducting pathlength L. Assume conduction only. a. Estimate the heat transfer (in Joules per day) through these 20 windows when the inside temperature is 20C and the outdoor temperature stays at -15C. b. The U-factor of replacement windows (double pane, argon filled, low-E vinyl frames) is 0.31 Btu/hr-ft2-oF. How much heat is transferred in a day for this case?:D docs.google.com/forms :QT: Choose the correct answer نقطة واحدة The minus sign in Fourier's law is necessary because heat is always transferred in the direction of increasing temperature O decreasing temperature össlg äbäs The thermal resistance of the : wall is given by kL/A O None k/AL O L/kA O نقطة واحدة With composite walls it is often convenient to work with an overall heat transfer coefficient U, which is