Answered: Air at 24°C is blown over a hot pipe… | bartleby

Related questions

Question

Air at 24°C is blown over a hot pipe with a surface area of 3.85 m² to dissipate 926 W of heat energy. What is the minimum convection heat transfer coefficient that will ensure that the temperature of the pipe surface is less than 45°C [round your final answer to two decimal places]?

Expert Solution

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Blurred answer

Similar questions

A 25,000 kg subway train initially traveling at 15.5 m/s slows to a stop in a station and the stays there long enoughfor its brakes to cool. The station's dimensions are 65.0 m long by 20.0 m wide by 12.0 m high. Assuming all the work done by the brakes in stopping the train is transferred as heat uniformly to all the air in the station, by how much does the air temperature in the sation rise? Take the density of the air to be 1.20 kg/m3 and its specific heat to be 1020 J/kg*K.
A 1.82 m wide by 1.11 m high metal plate must be insulated to prevent contact burn injuries. If the heat transfer rate is 136 W and the temperature across the insulation must be reduced from 87.3°C to 40.3°C, what is the minimum thickness (in cm) of insulation required [round your final answer to two decimal places]? {kins = 0.031 W/m∙K}
An electric stove burner has surface area 325 cm² and emissivity e = 1. The burner consumes 1500 W and is at 900 K. If room temperature is 300 K, what fraction of the burner's heat loss is from radiation?
(a) How much heat in joules is gained by the water?(b) How much heat in joules is lost by the metal?(c) What is the heat capacity of this piece of metal?
Can you show me how to solve this?
Assume Lake Michigan contains 4.90 x 1012 m³ of water, and assume the water's density is that of water at 20°C and 1 atm. (a) How much energy (in J) is required to raise the temperature of that volume of water from 12.2°C to 24.4°C? 4.1E19 From the density of water and the volume, what is the mass of the water? What is specific heat? How is it related to the energy input, mass, and temperature change? Use it to solve for the energy. Be careful with units. J (b) How many years would it take to supply this amount of energy by using a power of 1,400 MW generated by an electric power plant? 926 How is power related to energy and time? Knowing the energy from part (a), can you find the time? Be careful with units. Make sure you convert the time in seconds to years. yr
You have 766 gg of water at 12.5 ∘C∘C in a large insulated beaker. How much boiling water at 100 ∘C∘C must you add to this beaker so that the final temperature of the mixture will be 74.5 ∘C∘C? Express your answer in kilograms.
A 1.82 m wide by 1.11 m high metal plate must be insulated to prevent contact burn injuries. If the heat transfer rate is 136 W and the temperature across the insulation must be reduced from 87.3°C to 40.3°C, what is the minimum thickness (in cm) of insulation required [round your final answer to two decimal places]? {kins = 0.031 W/m∙K}
Solve the following: a) A house walls that are 15 cm thick and have an average thermal conductivity four times that of glass wol. Assume there are no windows or doors. The walls' surface area is 950000 cm? and their inside surface is at 23 °C, while their outside surface is at 4°C. (Thermal conductivity of glass wool is 0.042 W/m°C) O Calculate the rate of heat conduction through house walls? (ii) How many 150W room heaters would be needed to balance the heat transfer due to conduction? (approximate number) b) A spherical infrared heater of radius 5.15 cm has an emissivity of 0.75. What temperature must it run at if the required power is 0.38 kW? Neglect the temperature of the environment. (Stefan's constant = 5.67*10-8 Wm 2K4) The temperature of the heater in Celsius =