The temperature of an experimental heated enclosure is being ramped up from 80 to 450°F at the rate of 19°F/min. A thermocouple, embedded in a Thermowell for protection, is being used to monitor the oven temperature. The thermocouple has a time constant of 84 s. At t= 10 min, what is the difference between the actual temperature and the temperature indicated by the thermocouple? Final answer in whole number.
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- Q5Two large containers A and B of the same size are filled with different fluids. The fluids in containers A and B are maintainedat 0° C and 100° C, respectively. A small metal bar, whose initial temperature is 100° C, is lowered into container A. After1 minute the temperature of the bar is 90° C. After 2 minutes the bar is removed and instantly transferred to the othercontainer. After 1 minute in container B, the temperature of the bar rises 10°. How long, measured from the start of theentire process, will it take the bar to reach 99.9° C?The temperature of an experimental heated enclosure is being ramped up from 80 to 450°F at the rate of 19°F/min. A thermocouple, embedded in a Thermowell for protection, is being used to monitor the oven temperature. The thermocouple has a time constant of 84 s. At t = 10 min, what is the difference between the actual temperature and the temperature indicated by the thermocouple? Final answer in whole number. Please show your complete solution and write readable.In the United States, energy for household heating is generally sold using English units, e.g., therm, gal, and cord. A house in Wisconsin uses 1200 therms of thermal energy during the heating season. Calculate the cost of fuel if the furnace uses (a) natural gas with an efficiency of 70%; (b) No. 2 fuel oil, efficiency 65%; (c) kerosene, efficiency 99.9% (unvented); and (d) wood with l5% moisture with an efficiency of 50%. Use the data in Tables 2.2, 2.7, and 2.13. The efficiencies are based on the HHV. Assume the cost of natural gas is $8/MBtu, the cost of No. 2 fuel oil is $3/gal, the cost of kerosene is $3.50/gal, and the cost of wood is $100/cord. Assume the bulk density of cord wood is 30 lbm/ft3 .
- Water at 10C temperature flowing from a pipe with a diameter of 100mm at a speed of 2m / s, air from a pressure of 2 ATM at 180F flowing at a speed of 50 ft / s from a pipe with a diameter of 2 in, and an oil with a specific gravity of 0.78 and a diameter of 20 cp at a speed of 5 ft / s through a 2in pipe. Shows the flow state of the biopolymer melt flowing through the pipeline at a speed of 0.2 m/s, with a density of 900 kg/m3 and a density of 1 Pa-s1. A Carnot engine requires 35 kJ/sec from the hot source. The engine produces 15 kW of power and the temperature of the sink is 26°C. What is the temperature of the hot source? The answer is 523.25 K, show the complete solution and draw a diagram.Thermodynamicclass contains 32 undergrad students. The plan is to air-conditionthe classroomwith air-conditioning units of 8-kW cooling capacity. It is assumed that on average each studentdissipate heat at a rate of about 300 kJ/h. There are 12lightbulbs in the room, each with a rating of 100 W. The rate of heat transfer to the classroom through the walls and the windows is estimated to be 14,000 kJ/h. If the room air is to be maintained at a constant temperature of 23oC,i.e. ∆?????≈0, determine the number of air-conditioning units required.
- A heat engine operating on the Carnot cycle uses solar energy as the source of high-temperature heat input. The solar irradiation, averaged over the day, has a value of qflux=0.51 kW/m2. This provides energy to the cycle at a uniform temperature of 450 K, and the cycle rejects heat to the environment at a temperature of 300 K. The engine produces 2000 kW of power. During solution, the following parts must be in order. (a) Sketch the system and its boundary, with all the given data displayed on it.(b) Draw the temperature-entropy (T-s) diagram of the cycle. Assume start of heat addition is state point 1 and all the given data displayed on it.(c) Determine the minimum area of the solar panel in acres that is needed to provide thispower Write down units in each step of the solution, where appropriate. Write your comments on the outcome of your solution. Use correct and appropriate symbols for the known andunknown thermodynamic quantities and properties. plz solve completeA heat engine operating on the Carnot cycle uses solar energy as the source of high-temperature heat input. The solar irradiation, averaged over the day, has a value of qflux ¢ = 0.51 kW/m2 . This provides energy to the cycle at a uniform temperature of 450 K, and the cycle rejects heat to the environment at a temperature of 300 K. The engine produces 2000 kW of power. During solution, the following parts must be in order. (a) Sketch the system and its boundary, with all the given data displayed on it. (b) Draw the temperature-entropy (T-s) diagram of the cycle. Assume start of heat addition is state point 1 and all the given data displayed on it. (c) Determine the minimum area of the solar panel in acres that is needed to provide this power. Write down units in each step of the solution, where appropriate. Write your comments on the outcome of your solution. Use correct and appropriate symbols for the known and unknown thermodynamic quantities and properties.A heat engine operating on the Carnot cycle uses solar energy as the source of high-temperature heat input. The solar irradiation, averaged over the day, has a value of qflux = 0.55 kW/m2. This provides energy to the cycle at a uniform temperature of 420 K, and the cycle rejects heat to the environment at a temperature of 350 K. The engine produces 2500 kW of power. During solution, the following parts must be in order. (a) Sketch the system and its boundary, with all the given data displayed on it. (b) Draw the temperature-entropy (T-s) diagram of the cycle. Assume start of heat addition is state point 1 and all the given data displayed on it. (c) Determine the minimum area of the solar panel in acres that is needed to provide this power. Write down units in each step of the solution, where appropriate. Write your comments on the outcome of your solution. Use correct and appropriate symbols for the known and unknown thermodynamic quantities and properties.
- Initially, the temperature of an object is 70 degrees celsius, it is taken outside. The temperature of the surrounding is 20 degrees celsius at 3:03 Pm, the temperature of the body becomes 42 degrees celsius. Later, the object is then taken back inside where the temperature is 80 degrees celsius. At 3:10 PM, the temoerature of the object is 71 degrees celsius. Determine the time when the object is brought inside.Pressure cookers, in general, maintain a gage pressure of 2 atm (or 3 atm absolute) inside. Therefore, pressure cookers cook at a temperature of about 133°C instead of 100°C, cutting the cooking time by as much as 70 percent while minimizing the loss of nutrients. The newer pressure cookers use a spring valve with several pressure settings rather than a weight on the cover. A certain pressure cooker has a volume of 6 L and an operating pressure of 75 kPa gage. Initially, it contains 1 kg of water. Heat is supplied to the pressure cooker at a rate of 500 W for 30 min after the operating pressure is reached. Assuming an atmospheric pressure of 100 kPa, determine the temperature at which cooking takes place.Pressure cookers, in general, maintain a gage pressure of 2 atm (or 3 atm absolute) inside. Therefore, pressure cookers cook at a temperature of about 133°C instead of 100°C, cutting the cooking time by as much as 70 percent while minimizing the loss of nutrients. The newer pressure cookers use a spring valve with several pressure settings rather than a weight on the cover. A certain pressure cooker has a volume of 6 L and an operating pressure of 75 kPa gage. Initially, it contains 1 kg of water. Heat is supplied to the pressure cooker at a rate of 500 W for 30 min after the operating pressure is reached. Assuming an atmospheric pressure of 100 kPa, determine the amount of water left in the pressure cooker at the end of the process.