Question

In: Mechanical Engineering

1. A black thermocouple measures the temperature in a chamber with black walls. If the air...

1. A black thermocouple measures the temperature in a chamber with black walls. If the air around the thermocouple is at 20°C, the walls are at 100°C, and the heat transfer coefficient between the thermocouple and the air is 15 W /m2·°C, what temperature will the thermocouple read

Solutions

Expert Solution


Related Solutions

Question 3 A sheathed thermocouple is placed in a combustion chamber to measure the temperature of...
Question 3 A sheathed thermocouple is placed in a combustion chamber to measure the temperature of the gases at a certain point in the process. The thermocouple reading is 1110K and the inside wall temperature was measured at 1008K. The thermocouple has a surface area of 10 mm2 . (a) A pitot probe is used to measure the velocity of the gas stream in the vicinity of the thermocouple tip. It measures a difference in static and dynamic pressure of...
A thermocouple junction of 1.0-mm in diameter is inserted in a large chamber to measure the...
A thermocouple junction of 1.0-mm in diameter is inserted in a large chamber to measure the temperature of hot gas flowing through the chamber. The hot gas has a velocity of 2 m/s and temperature (Tg) at 800 K. The chamber surface (Ts) is maintained at 500 K. (a) If the thermocouple is at room temperature, Ti when it is inserted in the chamber, calculate the time required for the temperature difference, (Tg–T) to reach 2% of the initial temperature...
the adiabatic flame temperature (theoretical maximum temperature) of black coal in air is over 2000oC. If...
the adiabatic flame temperature (theoretical maximum temperature) of black coal in air is over 2000oC. If the ambient temperature is 20oC then the theoretical maximum efficiency of a coal fired power station is approximately 87%. Why then is the efficiency of even the best coal fired power stations less than 50%.
A spherical thermocouple junction 1.0 mm in diameter is inserted in a combustion chamber to measure...
A spherical thermocouple junction 1.0 mm in diameter is inserted in a combustion chamber to measure the temperature ?T? of the products of combustion. The hot gases have a velocity of V= 5 m/s. (a) If the thermocouple is at room temperature, Ti,when it is inserted in the chamber, estimate the time required for the temperature difference, ?T?-T, to reach 2% of the initial temperature difference, ?T?-Ti. Neglect radiation and conduction through the leads. Properties of the thermocouple junction are...
A thermocouple is used to measure a known temperature of 25oC. A set of measurements is...
A thermocouple is used to measure a known temperature of 25oC. A set of measurements is taken. 29.6% of the measurements are found within ±1 oC of 25oC (the sample mean value is 25oC). We assume the temperature to be a random variable following a Gaussian distribution function. Please answer the below questions and upload your work as a single file (preferably PDF or jpeg). You need to show ALL work. Question 1. Show that the standard deviation of the...
Why thermistor resistance, thermocouple voltage, platinum resistance are directly proportional to temperature?
Why thermistor resistance, thermocouple voltage, platinum resistance are directly proportional to temperature?
COURSE: SOIL MECHANICS -Types of Retaining Walls 1. Gravitational Walls 2. Cantilever Walls 3. Criva Walls...
COURSE: SOIL MECHANICS -Types of Retaining Walls 1. Gravitational Walls 2. Cantilever Walls 3. Criva Walls 4. Gabion Wall 5. Sheet pile walls 6. Screen walls 7. Armed Earth 8. Walls in Mensula 9. Buttress Walls -Describe the identified retaining walls -Identify the importance and application it represents.
I wish to use a B-type thermocouple to measure a temperature of 16000C. I am using...
I wish to use a B-type thermocouple to measure a temperature of 16000C. I am using 1000C (boiling water) as my reference temperature. What is the emf expected at 16000C ? (Refer to the NIST thermocouple database): a) 11.233 mv b. 0.033 mV c. 11.263 mV d. None of the above
Obtain manufacturers’ data on thermocouple and thermistor temperature sensors for measuring temperatures of hot combustion gases...
Obtain manufacturers’ data on thermocouple and thermistor temperature sensors for measuring temperatures of hot combustion gases from a furnace. Explain the basic operating principles of each sensor and compare the advantages and disadvantages of each device. Consider sensitivity, accuracy, calibration, and cost.
A type K thermocouple with a 0°C reference will monitor an oven temperature at about 300°C....
A type K thermocouple with a 0°C reference will monitor an oven temperature at about 300°C. Vout was solved to equal 12.209mV. But part 2 I need help with. Part 2 asks: Extension wires of 1000ft length and 0.01ohms/ft will be used to connect to the measurement site. Determine the minimum voltage measured input impedance if the error is to be within 0.2%? The answer given is: 9.98kohms
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT