Example of engineering application using Convection heat transfer. And draw a diagram of convection heat transfer. Note: Agricultural Machines only.
Q: The temperature of a cylindrical tank containing liquid nitrogen is -10°C. Tank diameter is 16 cm.…
A: Given data: Here, Ts represents the liquid temperature, d represents the diameter, Q̇ represents…
Q: 4. A car engine with the dimensions 0.6 m high, 0.50 m-wide, and 0.8-m- long. The bottom surface of…
A: Data given-
Q: A 6 cm diameter cylinder is initially at a temperature of 10 °C. Later, this cylinder was thrown…
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Q: Water with a temperature of 15 ° C approaches vertically to a cylinder with a surface temperature of…
A: Given- Ts=120∘CTW=15∘Cd=25mm=0.025mV=1m/sPr=5.16ν=0.76837×10-6m2/s
Q: 31. A uniformly heated square plate of 2 ft x 2 ft is exposed to cold air at 80 F. The heater output…
A: following is the solution to the above problem-
Q: Water at 10°C is is flowing at 0.8 m/s across a long cylinder that is made of a material that…
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Q: what is the Grooves?What its effect on heat transfer?Explain th with the illustration that shows its…
A: A groove is a long, narrow depression formed into a material for the purpose of allowing another…
Q: A 2.5-m-tall steel cylinder has a cross-sectional area of 1.5 m2. At the bottom, with a height of…
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Q: With reference to a Marine (Ship's) Boiler, describe the methods of heat transfer, Conduction,…
A: Heat Transfer in boiler
Q: Fins are used to improve heat transfer by increasing the effective * surface area TRUE 2 us O
A: the given statement is true.
Q: Q2/ An aluminum sphere weighting 7kg and initially at a temperature of 533K is suddenly immersed in…
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Q: à heat transfer takes place by convection _with ficient of h = 60 W/m2 · °C. Calculate (a) the…
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Q: Write the formulas briefly explaining the heat transfer mechanisms.
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Q: a) What is forced convection? How does it differ from natural convection? Is convection caused by…
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Q: For internal forced convection, friction factor f can be found by using either the Moody charts, the…
A: The Moody chart or Moody diagram (also Stanton diagram) is a graph in a non-dimensional form that…
Q: 4. A car engine with the dimensions 0.6 m high, 0.50 m-wide, and 0.8-m- long. The bottom surface of…
A:
Q: The ratio of heat flow Q/Q2 from two walls of having same thickness their thermal conductivities as…
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Q: A horizontal disc of 9 cm diameter, which is at a temperature of 45°C, is immersed facing upward in…
A: The law states that the rate of heat transfer by convection between a solid body and a surrounding…
Q: In thermally fully developed flow of a fluid with constant properties, the local convection…
A: Thermally fully developed flow of fluid is in which temperature profile doesn't change along the…
Q: and Surface temperature 4. In what functions does Nusselt number in natural convection differ from…
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Q: Question - Maddy found the value of heat transfer coefficient 26 W/m^2 °C and faces the difficulties…
A: When energy in the form of heat is transferring by means of convection, the magnitude of heat…
Q: Q3/A 10-cm length of platinum wire 0.5 mm in diameter is placed horizontally in a container of air…
A: To find: The surface temperature. Given: The length of platinum wire is l=10 cm. The wire diameter…
Q: ou have experienced convection cooling if you have ever extended your handout of the window of a…
A: given data; temperature at hand (T)=300c(a)⇒vehicle speed…
Q: Q3) On a hot summer day, a student turns his fan on when he leaves his room at 9.00 am. When he…
A: In a Heat transfer, the study of the transfer of heat is carried out by conduction, convection, or…
Q: Q2/ A small horizontal plate is in the shape of a square with a length of 5 cm. The plate is…
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Q: |A 3 m internal diameter spherical tank made of 1 cm thick stainless steel (k = 15 W/mK) is used to…
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Q: An automotive engine can be approximated asa 0.4-m-high, 0.60-m-wide, and 0.7-m-long…
A: Given data: The height of the automotive engine is h = 0.4-m The width of the engine is w = 0.60 m…
Q: Question Consider heat loss through the two walls of a house on a winter night. The walls are…
A: Given that onle wall has a glass window and other wall does not have any window.
Q: Q3/ A 10-cm length of platinum wire 0.5 mm in diameter is placed horizontally in a container of air…
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Q: Derive the relation between the coefficient of linear thermal expansion and coefficient of area…
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Q: In a concentrated solar power plant, molten salt tank is used to store the thermal energy from the…
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Q: A hot plate of length 0.75 m, width 0.5 m, and thickness 2 cm is placed in an air stream at 20°C. It…
A: The solution is in the following stpes
Q: The heat loss from a fin is 6W. The effectiveness and efficiency of the fin are 3 and 0.75…
A: Given:Qf=6 Wε=3η=0.75
Q: What is heat transfer? And modes oh heat transfer?
A: Heat transfer :- The energy transfer due to temperature difference is called as heat transfer. its…
Q: Water is entering a heated tube at mass ow rate of 1.2 kg/s. The temperature at the inlet is 20 C…
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Q: + A 2 5 What is the effect of roughness on heat transfer, explain it with diagrams
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Q: Consider a hot baked potato. Will the potato cool faster or slower when we blow the warm air com ing…
A: It will cool faster in case of warm air coming from lung.
Q: The convection heat transfer coefficient is usually higher v in natural convection than forced…
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Q: A 3 m internal diameter spherical tank made of 1 cm thick stainless steel (k = 15 W/mK) is used to…
A: Given: To find: total heat transfer to ice water
Q: bu u camcn 2 yüzayinde Tooor =25% h, =65 Tool in
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Q: A large sheet of glass 2” thick is initially at 300oF throughout. It is plunged into a stream of…
A: Time required to cool the glass to an average temperature of 100oF is 24.3049 hr.
Q: Compare the value between the the actual heat transfer rate Qactual for the surface with fins and…
A: Solution: The ratio of fin heat transfer to that of which the heat transfer will occur from the…
Q: Q2: Explain, motorcycle engine is either considered as free or forced convection. Justify your…
A: Heat transfer is carried out by three phenomenon 1) Conduction 2) Convection 3) radiation Convection…
Q: With the aid of a suitable diagram, differentiate the processes of heat transferred by a conduction…
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Q: Q4/ A vertical square plate, 30 cm on a side, is maintained at 50C and exposed to room air at 20C.…
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Example of engineering application using Convection heat transfer. And draw a diagram of convection heat transfer.
Note: Agricultural Machines only.
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- A spherical communications satellite, 2 m in diameter, is placed in orbit around the earth. The satellite generates 1000 W of internal power from a small nuclear generator. If the surface of the satellite has an emittance of 0.3, and is shaded from solar radiation by the earth, estimate its surface temperature.An electrical transmission line of 1.2-cm diameter carries a current of 200 amps and has a resistance of 310-4 ohm per meter of length. If the air around this line is at v, determine the surface temperature on a windy day, assuming a wind blows across the line at 33 km/h.1.67 In beauty salons and in homes, a ubiquitous device is the hairdryer. The front end of a typical hairdryer is idealized as a thin-walled cylindrical duct with a 6-cm diameter with a fan at the inlet that blows air over an electric heating coil as schematically shown in the figure. The design of this appliance requires two power settings, with which the air blown over the electric heating coil is heated from the ambient temperature of to an outlet temperature of and with exit air velocities of 1.0 m/s and 1.5 m/s. Estimate the electric power required for the heating coil to meet these conditions, assuming that heat loss from the outside of the dryer duct is neglected.
- Determine the rate of heat transfer per meter length from a 5-cm-OD pipe at 150C placed eccentrically within a larger cylinder of 85 magnesia wool as shown in the sketch. The outside diameter of the larger cylinder is 15 cm and the surface temperature is 50C.The heat transfer coefficient for a gas flowing over a thin float plate 3-m long and 0.3-m wide varies with distance from the leading edge according to hc(x)=10x1/4Wm2K If the plate temperature is 170C and the gas temperature is 30C, calculate (a) the average heat transfer coefficient, (b) the rate of heat transfer between the plate and the gas, and (c) the local heat flux 2 m from the leading edge. Problem 1.183.16 A large, 2.54-cm.-thick copper plate is placed between two air streams. The heat transfer coefficient on one side is and on the other side is . If the temperature of both streams is suddenly changed from 38°C to 93°C, determine how long it takes for the copper plate to reach a temperature of 82°C.
- 1.21 In an experimental set up in a laboratory, a long cylinder with a 5-cm diameter, and an electrical resistance heater inside its entire length is cooled with water flowing crosswise over the cylinder at and a velocity of 0.8 m/s. For these flow conditions, 20 kW/m of power is required to maintain a uniform temperature of at the surface of the cylinder. When water is not available, air at is used with a velocity of 10 m/s to maintain the same surface temperature. However, in this case, the cylinder surface heat dissipation rate is reduced to 400 W/m. Calculate the convection heat transfer coefficients for both water and air, and comment on the reason for the differences in the values.A mild-steel cylindrical billet 25 cm in diameter is to be raised to a minimum temperature of 760C by passing it through a 6-m long strip-type furnace. If the furnace gases are at 1538C and the overall heat transfer coefficient on the outside of the billet is 68W/m2K, determine the maximum speed at which a continuous billet entering at 204C can travel through the furnace.The interior wall of a large, commercial walk-in type meat freezer is covered under normal operating conditions with a 2-cm thick layer of ice. One day, a power outage cuts electricity to the refrigeration system of the freezer. Estimate the time required to melt this layer of ice if it has a mass density of 700kg/m3 and a latent heat of fusion of 334 kJ/kg. Consider the air temperature inside the freezer to be 20C with a heat transfer coefficient of 2W/m2K for convection from the freezer surface to air, and clearly state the assumptions made in your calculations.
- How much heat is lost due to heat convection in a 25 minute period from 50*10ft wall. If the difference between the wall temperature and the air temperature is 54 F and the surface of the wall has a heat transfer ratio of 0.17 BTU/hr? Show detailed solutionHi, can you help me to answer this question using the first law of thermodynamics? On a hot summer day a student turns his fan on when he leaves his room in themorning. When he returns in the evening will the room be warmer or cooler than theneighborouing rooms ? Explain your answer using the first law of thermodynamics.Assume ALL doors and windows are kept closed.Hi, can you help me to answer this question using the first law of thermodynamics formula to explain this event? On a hot summer day, a student turns his fan on when he leaves his room in themorning. When he returns in the evening will the room be warmer or cooler than theneighborouing rooms ? Explain your answer using the first law of thermodynamics.Assume ALL doors and windows are kept closed.