A pipe carries hot molten lead from one part of a factory floor to another. The mass flow rate of lead 0.05 kg/s. While trying to figure out the heat loss from the pipe, you found that over a 2-m length of pipe the lead temperature drops from 580-C to 557.C. What is the rate at which thermal energy is being lost from the lead carrying pipe in this 2-m section? Use the property table to find out properti of lead as needed.
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- A liquid reactant solution is pumped through a pre-heater before entering a reaction vessel. The solution enters the pre-heater at 25 °C and must enter the reactor at 45 °C. The flow of the reactant solution is 1500 mL per minute. The density of the reactant solution is 0.91 g-cm3 and the heat capacity is 1.75 Jg1.K1. ASsume there is no heat loss in the pre-heater or between the pre-heater and the reactor. a. Draw a schematic of the pre-heater, detailing all mass and energy flows. b. Clearly define a system boundary. c. Write the general energy balance, and a simplified energy balance stating all assumptions that apply to this problem. d. What is the minimum power rating required for the pre-heater?Heat exchangers are devices that facilitate the transfer of thermal energy from one fluid to another across a solid wall. In a particular heat exchanger, glycerin enters the unit at a temperature of 30°C and exits the unit at a temperature of 60°C. What is the temperature change of the glycerin in units of °F, °R, and K?You are being tasked as a wind tunnel engineer to investigate the performance of newly designed high-speed wind tunnel in UPNM. An exhaust gas flows through a nozzle where the inlet area is 5,000 cm2.At this inlet, the gas has a velocity of 1,200 m/s, temperature of 1,500oC,and pressure of 6,000 kPa. Initial measurement revealed that the pressure at the exit of the wind tunnel is 100 kPa. Based on this information, analyze and investigate ; i. Mach number at inlet of the nozzle ii. The velocity of gas at exit iii. The area of the nozzle at exit Take specific heat ratio for the exhaust gas, ? to be 1.7 and the gas constant, R to be 205 J/kg.
- In a concentrated solar power plant, molten salt tank is used to store the thermal energy from the sun during the day. The tank wall thickness is 3cm containing molten salt at a temperature of 390 degree Celsius. There is atmospheric air outside the tank at a temperature of 30 degree Celsius. Suppose heat is lost as a result of heat transfer from the molten salt to the atmospheric air. What is the mode of heat transfer in this condition? conduction then convection convection then conduction convection then conduction then convection conduction then convection then conductionPLEASE SHOW THE STEP-BY-STEP SOLUTIONIn addition to filling in the blanks below, show all of your work for this problem on paper for later upload. You are cooking dinner for a friend in Denver on a day in which the atmospheric pressure is 0.831 atm. Given that the normal boiling point of water is 100.0 °C and the heat of vaporization of water is 40.66 kJ mol1, compute the temperature of boiling water in Denver. Enter your value in the first box and an appropriate unit of measure in the second box. A
- Pure ethyl alcohol at 35°C is flowing inside a 2-inch diameter plastic pipe at a flow rate of 0.13 m3/s. Determine: a) The density of the fluid in kg/m3. Answer b) The viscosity of the fluid in cP. Answer c) velocity of the fluid in m/s. Answer d) What is the Reynolds number of the fluid Answer e) type of fluid flow (laminar, transition, turbulent) Answercalculate the heat transfer of 6.2 kg of lead to waterPLEASE SOLVE THE FOLLOWING THREE QUESTIONS Question G: Generally speaking, (no numbers required), at what point does Newton's Model of Cooling (T=A+Be^kx) (when regarding dead bodies' temperatures) no longer work? What in reality gives us an indication that we’ve taken it too far? Question H: Assuming that the temperature of the person at the time of death (TOD) was 98.6 °F, set up a TOD equation using the values of ,A, ,B, and k you’ve calculated. Then, solve the equation using the same logarithm method you used to solve for .k. A: 68 Farehneits, B: 17.9 Fareinheit K: -0.002564 TOD: 98.6 Fareinheit Plug the above info into Newton's law of cooling: (T=A+Be^kx) Write your answer as a time, not just as x minutes. Recall that when ,x=0, the time is 2:00 PM. Question I: When forensic expert determines the time of death, they often have additional information besides body temperature. Suppose a coroner finds that the person who was murdered had an infection that probably raised the…
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