A 25-cm-diameter stainless steel ball (r = 8055 kg/m3, cp 480 J/kg·°C) is removed from the oven at a uniform temperature of 300°C . The ball is then subjected to the flow of air at 1 atm pressure and 25°C with a velocity of 3 m/s. The surface temperature of the ball eventually drops to 200°C. Determine the average convection heat transfer coefficient during this cooling process and estimate how long the process will take.

Q: Using EES (or other) software, investigate the effect of the exhaust gas inlet temperature on the…

A: The problem is based on the heat exchanger in which the exhaust gas is used for the evaporation of…

Q: Consider water is flowing through a pipe with a 10 cm diameter at a flow rate of 0.2 kg/s. The inlet…

A:

Q: What does the lumped capacity model describe? Give an example (with a drawing) of a heat transfer…

A:

Q: In a gas-fired boiler, water is bein cm-diameter tube submerged in velocity of 7.5 m/s, and leaves…

A: The properties of the air at 1 atm pressure and 300 oC temperature,The mass flow rate of air in the…

Q: 90 W of energy is dissipated in 2-m-long horizontal pipe whose diameter is 16 cm. The pipe is cooled…

A:

Q: total rate of heat transfer from the cubes to the ambient air, when 2700 cubes are to be annealed…

A: Assumptions 1 The balls are spherical in shape with a radius of r0 = 4 mm. 2 The thermal properties…

Q: The sensible and latent heat losses from a space are 22 kW and 9.5 kW respectively. The space is…

A:

Q: The average convection heat transfer coefficient during this cooling process is ____ W/m2·°C

A: Given DataThe steel ballDensity ρ = 8055 kg/m3Specific heat cp = 480 J/kg·KThe diameter  D =0.15…

Q: Air at 10oC enters a 10-cm-diameter and 4-m-long pipe at a rate of 0.035 kg/s. The inner surface of…

A: Given:Air inlet temperature, Tin = 10°CPipe diameter, D = 10 cm = 0.1 mPipe length, L = 4 mMass flow…

Q: A Covid-19 patient whose weight is 65 kg has a body temperature of 38°C due to the ever caused by…

A:

Q: The water vapor is manually compressed in an unknown process until the volume of water vapor (Vw2)…

A: Given that, Mass of air, ma=0.4 kg,Pressure of air, Pa1=250 kPa,Temperature of air, Ta1=300 K,Mass…

Q: Consider water is flowing through a pipe with a 10 cm diameter at a flow rate of 0.2 kg/s. The inlet…

A:

Q: Liquid water flows in a circular tube at a mass flow rate of 0.006 kg/s. The water enters the tube…

A: A mass flow rate of = 0.006 kg/s.The water enters the tube at The average convection heat transfer…

Q: outlet mean temperature of the water.

A: Given: Heat generated=5 kW m=0.2 kg/s Cp=4.18 kJ/kgK Ti=25oC To determine: Outside temperature

Q: gid vessel. At v rature will the the container

A:

Q: Water vapour at 100 kPa and 150 is contained in a rigid vessel. At what temperature will the vapour…

A: Condensation is a process in which superheated vapor starts to converts into steam. Heat has to be…

Q: Q-2/ An office room has an area of 7*5 square meter and 4m height, this room is heated by the…

A: Heat transfer: The transfer of heat from the system to surroundings due to the temperature…

Q: Combustion gases passing through a 5-cm-internal-diameter circular tube are used to vaporize waste…

A: Given data is

Q: Consider an electrically heated room with a floor space of 100 m² and an average height of 4 m at…

A:

Q: Consider water (at a temperature of 276 K ) flowing inside a cylindrical pipe, having a diameter of…

A:

Q: ) The properties of air at the exit of the cooling coil, -) Cooling coil load.

A: Given: V= 1.5 cmm =1.5 m3/min DBT=28oC WBT=20oC Sensible cooling to 16oC To determine: The…

Q: determine the total power rating of the electronic devices

A: Given: T∞=30°CTs=65°CL=1.5 mb=d=20 cm=0.2 mV=200 m/min=3.33 m/s To determine: The total power rating…

Q: A person puts a few apples into the freezer at -13°C to cool them quickly for guests who are about…

A: To solve the above problem first of all we have to calculate , Biot number(Bi) and fourier…

Q: One house owner with a pond on his property has decided to use the pond water to cool his house. His…

A: Given: Diameter of copper tube = 10 cm Temperature of pond water (Tp) = 15°C Temperature of air…

Q: Steam is used to heat a cylindrical open tank of water until it boils, after which a proportion of…

A: (a) Heating medium is saturated steam at 5 bar      Temp. of the heating coil is the saturation…

Q: Air enters an adiabatic nozzle at 750 kPa and 307°C with velocity of 300 m/s. It leaves the nozzle…

A: Given Data  At state 1 P1=750KPa T1=307C C1=300 m/s At state 2 T2=77C A1=2A2

Q: Liquid water enters a 10-m-long smooth rectangular tube with a -50 mm and b = 25 mm. The surface…

A: Given: The length of tube, L = 10 m The width of tube, a = 50 m The height of tube, b = 25 mm The…

Q: For bacteriological testing of water supplies and in medical clinics, samples must routinely be…

A: (a) The heat is taken as Q that is used to fuse the wax. So, the mass of wax is written as There…

Q: mass of ice at -4°C is needed to cool 115 kg of vegetables in a bunker for 24 hours. The initial…

A: Given                           Mass, m = 115 kg       Specific heat of water = 4.22 kJ/kg.K…

Q: Determine the length of the pipe required to cool the pasteurized orange juice from 65 to 22 °C at a…

A: Given:For hot fluid:Thi=65 CThe=22 Cmh=1500 Kg/hrd=3 cm =0.03 mTci=4 CTce=20 CU=900 J/m2sC=3890…

Q: Consider an adiabatic duct of diameter 12 cm with inlet conditions of the velocity, temperature,…

A: at inlet  Mach number  = 0.4 Pressure = 200 kPa Temperature  = 550 K friction factor = 0.021

Q: Liquid water flows in a thin-walled circular tube at a mass flow rate of 11 g/s. The water enters…

A: To obtain the solution to the given question, we need to calculate the heat transfer coefficient…

Q: Air with a temperature of 128 °C, a density of 4.89 kg/m3 and a velocity of 121 m/s enters a nozzle…

A: The mass flowrate of fluid passing through a cross section can be determined as the product of…

Q: In an oil cooler, 216 kg/h of hot oil enters a thin metal pipe of diameter 25 mm. An equal mass of…

A: Given Mass flow = 216 kg/h Diameter of the pipe = 25mm Inlet temperature = 420 K Maintained…

Q: What is mass transfer? Heat transfer? And momentum

A: Given data  Explain the following terms.

Q: A 36-m room is to be heated by three ton(1 ton =1000 kg) of liquid water contained in a tank that is…

A:

Q: Dry air enters an inclined pipeline in the upward direction being preheated. The pipe has an inner…

A: The inner diameter of the pipe is d=0.3 m The total length of the pipe is l=5 m. The inclination is…

Q: Propane (MW = 44 ; k = 1.13) initially at 30 psia and 215°F, is stored inside a large spherical…

A: Write the given data: MW=44k=1.13P1=30 psiaT1=215 °F=215 +460.67 °R=675.67 °RT2=635 °F=635 +460.67…

Q: Stainless steel ball bearings (p = 8085 kg/m³ and cp = 0.480kJ/(kg °C)) having a diameter of 1.5 cm…

A:

Q: Q14) A 65-kg beef carcass (k=0.47 W/m °C and a=0.13x10-6 m²/s) initially at a uniform temperature of…

A: velocity, v = 1.8 m/s

Q: 5-7 Oxygen at a pressure of 2 atm and 27°C blows across a 50-cm-square plat velocity of 30 m/s. The…

A: Handwritten.jpg

Q: (b) An airplane is flying at 1000 km/h through a still air having a pressure and temperature of 78.5…

A: Given data: V=1000 km/h=277.77 m/sP0=78.5 kN/m2T0=-8°C=265 KR=287 J/kg.Kγ=1.4 Need to determine the…

Q: Calculate the amount of heat required (in kJ) to raise the temperature of 23.4 g of ice at -11°C to…

A: given data m = 23.4 g = 0.0234 kg ΔHvap = 40.67 kJ/mol ΔHfus = 6.008 kJ/mol Cice = 2.092 J/g°C,…