Convection Correlations and Internal flow (circular tube) – Heated air required for a food- drying process is generated by passing ambient air at 20 °C through long, circular tubes (D = 50 mm, L = 5 m) housed in a steam condenser. Saturated steam at atmospheric pressure condenses on the outer surface of the tubes, maintaining a uniform surface temperature of 100°C. If an air flow rate of 0.01 kg/s is maintained in each tube, determine the air outlet temperature Tm.o and the total heat rate for a tube. Assume average Tm = 325 K.

Q: An aluminium pan whose thermal conductivity is 237 W/m/°C has a flat bottom whose diameter is 20 cm…

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Q: Q1) A 20-cm-square plate loses heat with rate of 5000 W/m². Air at 1 atm and 300 K flows across the…

A: Side of the square plate, a = 20 cm = 0.20 m Heat lost from the plate, Q = 5000 W/m2 Air flows at…

Q: 2-The steady-state temperature distribution in a one-dimensional wall of thermal conductivity…

A: Given steady state temperature distribution in a one-dimensional wall T(oC) = a + bx2. Thermal…

Q: For a stream of water (at 32 °C) flowing over a plate at a constant surface temperature of (90 °C)…

A: Given:  T∞ = Twater = 32 oC            Thermal conductivity of water at 32 oC = 0.6 W/m.k…

Q: A metallic solid cylinder has a diameter of 11 cm and initial temperature of 300oC. The cylinder is…

A: Given, d= 11cm = 0.11m, r = 0.055m Ti = 300oC Tx = 50oC h = 1200W/m2oC Q = 4.9*106 J/m k = 204W/moC,…

Q: As the water flows through a pipe with an inner diameter of 5 cm and a length of 10 m, it heats up…

A: Inner diameter of the pipe, di = 5 cm = 0.05 m Length of the pipe, L = 10 m Initial water…

Q: -„ Energy Balances, Costs and Insulation - A 100 meter long section of a steam pipe with an outer…

A: The total resistance to heat transfer due to convection is calculated as follows:R = 1h(2πrL)h =…

Q: 7-2, Losses by Natural Convection from a Cylinder. A vertical cylinder 76.2 mm in diameter and 121.9…

A: The radiation heat loss is neglected. The mean of the given two temperatures will be the film…

Q: Q4. A 4.0-cm diameter sphere is maintained at 38°C and submerged in water at 15°C. Calculate the…

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Q: A metallic solid cylinder has a diameter of 11 cm and initial temperature of 300oC. The cylinder is…

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Q: A long circular cylinder is encased and centered in a long square cylinder of concrete (k 1.2 W/m·K)…

A: Given , Thermal conductivity,k=1.2W/mKTemperature of cylinder,T1=200°C=473KTemperature of…

Q: Use the on-line psychrometric chart (link in this module) to help solve this problem. The surface…

A: Given data: Surface temperature of the steel duct = 18 0C Dry bulb temperature of the surrounding…

Q: It is the transfer of energy as a result of a temperature difference between the system and the…

A: Heat is the transfer of thermal power from a system to its environment or from one object to some…

Q: What does this graph show?

A: This question is based on data analysis.

Q: A steam pipe with 80 mm diameter passes through a room at 25°C (both air and walls). The pipe is…

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Q: A 16-m x 8.5-m section of wall of an industrial furnace burning natural gas is not insulated. outer…

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Q: The gas at an average temperature of 180 oC is transported through a steel (steel-46 W/m2.K) pipe…

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Q: A bioengineer working at chemical company intends to dry an insoluble wet granular material in a pan…

A: Given Data : Dimensions of the pan = 0.6 m x 0.6 m x 0.03 m  The pan is insulated from the sides and…

Q: Polymer laminates are formed by “squeezing” two flat sheets of polymer together under high pressure.…

A: To derive an expression for the temperature as a function of time and position in the two polymer…

Q: The gas at an average temperature of 180 oC is transported through a steel (steel-46 W/m2.K) pipe…

A: Heat transfer takes place from a steel pipe through conduction and convection.

Q: A large spherical storage tank, 2 m in diameter, is buried in the earth at a location where the…

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Q: True or False

A: Ans 1- True  2-  False ( because cooling and chilling rate are governed by any of form it can be…

Q: Warm body fiulds remove neat Trom the body as they expelled and evaporated is a prOcess of losing…

A: In the human body, there are five modes of heat loss. They are as follows: Evaporation Respiration…

Q: Problem 2. In cement production the intermediate product which leaves the cement kiln is called…

A: Given that T∞=25 CTi=300 Ch =200 wm2kk=2 wmkTf =50 C

Q: Question 1 Hot oil flows through a steel tube with an outer diameter of 6 cm. The walls of the tube…

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Q: A concrete wall is insulated on one side and exposed to ambient air at 25°C on the other. If the air…

A: A concrete wall insulted on left side is exposed to ambient air.

Q: Consider that an iron is forgotten to be open throughout two days while its surface temperature is…

A: As given heat transfer is taking from iron to air ,it is a convection mode of heat transfer.…

Q: 1/6 Convection Ex. 3.15: air at 101.325 kPa and 308 K (35 °C) flows across a 50 mm diameter cylinder…

A: Given Diameter of cylinder D = 50 mm Density d = 0.966 Conductivity k = 0.0312 NPr = 0.695

Q: A steam pipe with 80 mm diameter passes through a room at 25°C (both air and walls). The pipe is…

A:

Q: Saturated steam at 267°F is flowing inside a hollow sphere with an ID of 0.824 in. and an OD of 1.05…

A: Refer to the figure shown below based on the given problem statement,

Q: Two identical 7.5-cm cubes of copper at 425 and 90°C are brought into contact. Assuming that the…

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Q: assessment. Question 7 The average molecular weight of a mixture that contains 30 mol% CO2 (MW = 44…

A: Supposed that- Total moles of mixture = 100 mol Then, CO2 = 30 mol % = 30 mol O2= 30 mol % = 30 mol…

Q: Saturated steam is condensed as a film on a vertical plate of height 50 cm. If the local heat…

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Q: One side of a copper block 5 cm thick is maintained at 250°C. The other side is covered with a layer…

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Q: The cylinder is made from aluminum with diameter and thickness of 5 cm and 1 cm respectively. The…

A: Given data: Diameter of cylinder = 5 cm Thickness of cylinder = 1 cm Wall temperature in the inside…

Q: A thin metal plate 1 mx 1 m is placed on a rooftop. It receives radiant heat from the sun directly…

A: At steady state the rate of radiant heat input to the plate must be equal to the rate of heat loss…

Q: Ex. 3.15: air at 101.325 kPa and 308 K (35 °C) flows across a 50 mm diameter cylinder at a velocity…

A: It is given that air is flowing in cylinder at a velocity of 50m/s. Given data are as follows:…

Q: A closed room containing hot air is used to cool down slabs of a solid with a conductivity of 160…

A: conductivity (k) =160 W/m*K density ρ= 2950 kg/m3 heat capacity Cp= 920 J/kg*K thickness of slab=2…