A long, uninsulated steam line with a diameter of 89 mm and a surface emissivity of 0.8
Question:
A long, uninsulated steam line with a diameter of 89 mm and a surface emissivity of 0.8 transports steam at 200°C and is exposed to atmospheric air and large surroundings at an equivalent temperature of 20°C.
(a) Calculate the heat loss per unit length for a calm day.
(b) Calculate the heat loss on a breezy day when the wind speed is 8 m/s.
(c) For the conditions of part (a), calculate the heat loss with a 20-mm-thick layer of insulation (k = 0.08 W/m ∙ K). Would the heat loss change significantly with an appreciable wind speed?
Fantastic news! We've Found the answer you've been seeking!
Step by Step Answer:
Answer rating: 60% (10 reviews)
KNOWN A long uninsulated steam line with a diameter of 89 mm and surface emissivity of 08 transports steam at 200C and is exposed to atmospheric air and large surroundings at an equivalent temperature ...View the full answer
Answered By
Parvesh Kumar
I am an experienced Mathematics and Statistics tutor with 10 years of experience teaching students and working professionals. I love teaching students who are passionate to learn subjects or wants to understand any mathematics and statistics concept at graduation or master’s level. I have worked with thousands of students in my teaching career. I have helped students deal with difficult topics and subjects like Calculus, Algebra, Discrete Mathematics, Complex analysis, Graph theory, Hypothesis testing, Probability, Statistical Inference and more. After learning from me, students have found Mathematics and Statistics not dull but a fun subject. I can handle almost all curriculum of mathematics. I did B.Sc (mathematics), M.Sc (mathematics), M.Tech (IT) and am also Gate (CS) qualified. I have worked in various college and school and also provided online tutoring to American and Canadian students. I look forward to discussing with you and make learning a meaningful and purposeful
5.00+
4+ Reviews
10+ Question Solved
Related Book For
Fundamentals of Heat and Mass Transfer
ISBN: 978-0471457282
6th Edition
Authors: Incropera, Dewitt, Bergman, Lavine
Question Posted:
Students also viewed these Mechanical Engineering questions
-
Calculate the heat-transfer rate per unit length for flow over a 0.025-mm-diameter cylinder maintained at 65oC. Perform the calculation for (a) air at 20oC and 1 atm and (b) water at 20oC; u = 6 m/s.
-
Calculate the heat loss through a 1-m by 3-m glass window 7 mm thick if the inner surface temperature is 20?C and the outer surface temperature is 17?C. Comment on the possible effect of radiation on...
-
Calculate the heat loss per m2 of outside surface area for a heated sphere 15 cm diameter covered with 50 cm insulation with thermal conductivity 0.057 kcal/hmC. The inside and outside temperature of...
-
Your company has just been names in as a defendant in a lawsuit because of an accident. The plaintiff is suing for $400,000 in damages. You have contacted legal counsel and the attorneys have advised...
-
The Cat's Meow manufactures gourmet cat food. During the month, it manufactured 5,000 cans of tuna, using 0.10 hour of direct labor per can at a rate of $8.00 per hour. The materials and labor...
-
A. What is the present value of $8,000 received in 7 years at 8% interest? B. Bonnie Lee buys a savings bond for $125. The bond pays 6% and matures in 10 years. What amount will Bonnie receive when...
-
Match the following concepts to their descriptions: 1. Document specifying when jobs will be manufactured. 2. Product costing system used by mass manufacturers. 3. Bill from supplier. 4. Document...
-
Price and efficiency variances. Peterson Foods manufactures pumpkin scones. For January 2009, it budgeted to purchase and use 15000 pounds of pumpkin at $0.89 a pound. Actual purchases and usage for...
-
a) A financial institution is a financial intermediary (FI'S) that facilitates the transfer of funds between suppliers and users of funds. Briefly explain the benefits that FI's provide to the...
-
Find the total number of channels in the corresponding band allocated by FCC. a. AM b. FM
-
Consider Problem 8.47. A more realistic solution would account for the resistance to heat transfer due to free convection in the paraffin during melting. Assuming the tube surface to have a uniform...
-
A horizontal tube of 12.5-mm diameter with an outer surface temperature of 240C is located in a room with an air temperature of 20C. Estimate the heat transfer rate per unit length of the tube due to...
-
Can a discontinuous function have a Laplace transform? Give reason.
-
Vicarious liability occurs when one person is held liable for the actions of anotherand perhaps when the former person has no idea what the latter person is up to. There are two conditions that make...
-
Late one Saturday evening, Joe and Mark decide to rob a local convenience store. Mark has a loaded shotgun for the robbery, but both men agree beforehand that the shotgun is only to scare the cashier...
-
BC was a private equity firm. It had funded the roll-up of multiple small businesses and appointed Mr. Rakesh as CEO to lead the newly created firm. The founders of the acquired firms had different...
-
Infobridge Private Limited is a product development company. It started with two employees and has now grown to 275 employees. This huge growth occurred because of its innovative product development...
-
An employee of a chemical company, Ariola, was concerned about some harmful carbon emissions, and increased carbon footprints which had been overlooked by environmentalists and political groups or...
-
By eqns. (8.1.4, 5 and 24 ), the Fermi energy \(\varepsilon_{F}\) is given by \[ \varepsilon_{F}=\left\{\frac{3}{4 \pi} f_{3 / 2}(z)ight\}^{2 / 3} \frac{h^{2}}{2 m \lambda^{2}}=\left\{\frac{3 \pi^{1...
-
Halley's comet travels in an ellipti- cal orbit with a = 17.95 and b = 4.44 and passes by Earth roughly every 76 years. Note that each unit represents one astronomical unit, or 93 million miles. The...
-
A pump with a 150-mm diameter impeller is operating at 1750 rpm and delivering 3.2 L/s with a total dynamic head of 16 meters. The pump's BHP is 3.4 kW (0.45 hp) under these conditions. Approximate...
-
A 100 Watt heater is used to melt 2 kg of solid ice at 10oC to liquid at +5oC at a constant pressure of 150 kPa. a) Find the change in the total volume of the water. b) Find the energy the heater...
-
Water is in a piston cylinder maintaining constant P at 700 kPa, quality 90% with a volume of 0.1 m3. A heater is turned on heating the water with 2.5 kW. What is the rate of mass (kg/s) vaporizing?
-
Ten kilograms of water in a piston/cylinder setup with constant pressure is at 450C and a volume of 0.633 m3. It is now cooled to 20C. Show the Pv diagram and find the work and heat transfer for the...
-
Sweeten Company had no jobs in progress at the beginning of the year and no beginning inventories. It started, completed, and sold only two jobs during the year-Job P and Job Q. The company uses a...
-
1. Review the following tracings, identify the type of BBB, and then explain how you determined your answers 2. Review the following tracing. Do you suspect left ventricular hypertrophy? Explain how...
-
What are signs that its time to cut corners to get the product launched, and what would you cut?
Study smarter with the SolutionInn App