Question: Suppose an engineer suggests that air is to be used instead of water in the tube of Problem 6.24 and the velocity of the air

Suppose an engineer suggests that air is to be used instead of water in the tube of Problem 6.24 and the velocity of the air is to be increased until the heat transfer coefficient with the air equals that obtained with water at 1.5 m/s. Determine the velocity required and comment on the feasibility of the engineer??s suggestion. Note that the speed of sound in air at 100?C is 387 m/s. From Problem 6.24: Water at a bulk inlet temperature of 93?C is flowing with a velocity of 1.5 m/s through a 0.015-m-diameter tube, 0.3 m long. If the tube wall temperature is 204?C, determine the average heat transfer coefficient and estimate the bulk temperature rise of the water.GIVENAir flow through a tubeBulk inlet air temperature (Tb,in) = 93?CTube diameter (D) = 0.015 mTube length (L) = 0.3 mTube surface temperature (Ts) = 204?CFrom Problem 6.23: hc,L = 13,037 W/(m2 K)ASSUMPTIONSSteady stateConstant and uniform tubetemperature

T.= 204C D-0.015 m Alr Tan=93C L= 0.3 m

Step by Step Solution

★★★★★

3.37 Rating (163 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

The flow must be turbulent therefore the heat trans... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

66-E-M-E-H-M-T (1759).docx

120 KBs Word File

Students Have Also Explored These Related Mechanical Engineering Questions!

A shell-and-tube heat exchanger is to be used to cool 200,000 lb/h (25.2 kg/s) of water from 100?F (38?C) to 90?F (32?C). The exchanger has one shell-side pass and two tube side passes. The hot water...

A well-insulated, thin-walled, counter-flow heat exchanger is to be used to cool oil (cp = 2.20 kJ/kg C) from 150 to 40C at a rate of 2 kg/s by water (cp = 4.18 kJ/kg C) that enters at 22C at a rate...

A heat pump is to be used for heating a house in winter. The house is to be maintained at 78F at all times. When the temperature outdoors drops to 25F, the heat losses from the house are estimated to...

2/21/2016 A modern ark | The Economist Special report: Climate change Biodiversity A modern ark To save endangered species, move them to more congenial places Nov 28th 2015 | From the print edition...

Final Review Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. Which of the following is a pair of scalar quantities? a. Speed Distance c....

A creative engineer suggests structuring the TLB so that not all the bits of the presented address need match to result in a hit. Suggest how this might be achieved, and what might be the costs and...

Portray in words what transforms you would have to make to your execution to some degree (a) to accomplish this and remark on the benefits and detriments of this thought.You are approached to compose...

Suppose that R(A, B, C) is a relational schema with functional dependencies F = {A, B C, C B}. (i) Is this schema in 3NF? Explain. [2 marks] (ii) Is this schema in BCNF? Explain. [2 marks] (b)...

1 WILMINGTON UNIVERSITY LIBRARY Business Continuity Plan (BCP) and Disaster Recovery Plan (DRP) 2 WILMU LIBRARY SERVICES 20,000 student population served 13 physical locations of access to university...

Prolog You are approached to compose a Prolog program to work with twofold trees. Your code shouldn't depend on any library predicates and you ought to expect that the mediator is running without...

Kohls Candy Company developed a new consumer product that is expected to earn $ 4,000 in profit each year if consumer demand is low, $ 20,000 per year if consumer demand is moderate, and $ 36,000 per...

Basso's Landscaping Services had the following transactions in August, its first month of busines 1) Purchased $750 of supplies on account. All supplies were used in August but were paid for in...

how is Cloud adoption is businesses have been rapidly increasing over the last several years

Assessing the impact of an incentive plan overview ladbrecks is a major department store with fifty retail outlets. The company's stores compete with outlets run by companies such as nordstrom,...

What is the impact of human resources in association to labor relations?

Q1. Count the number of falling edges occurring at Port B pin 2, and toggle pin 1 of port A when the number of toggles match last two digits of your roll no + 10.(write the code)

From the dropdown list, select the correct MACRS depreciation life for each asset listed. a. An automobile b. Business furniture c. A computer d. Residential real estate e. Commercial real estate f....

Assume an economy has a budget surplus of 1,000, private savings of 4,000, and investment of 5,000. a. Write out a national saving and investment identity for this economy. b. What will be the...

The inner wall of a rocket motor combustion chamber receives 160 kW/m 2 by radiation from a gas at 2760C. The convection heat transfer coefficient between the gas and the wall is 110 W/ (m 2 K). If...

On a cold winter day, the outside wall of a home is exposed to an air temperature of 2C when the inside temperature of the room is at 22C. As a result of this temperature gradient, there is heat...

Wearing layers of clothing in cold weather is often recommended because dead-air spaces between the layers keep the body warm. The explanation for this is that the heat loss from the body is less....

Delta Airlines' flights from Denver to Atlanta are on time 90 % of the time. Suppose 10 flights are randomly selected, and the number on-time flights is recorded. Round answers to 3 significant...

The next dividend payment by im, Incorporated, will be $2.75 per share. The dividends are anticipated to maintain a growth rate of 7 percent forever. Assume the stock currently sells for $49.10 per...

Suppose that you wanted to buy a new Honda Civic and you want to wait until you can get a good deal. You want to see if the usual/average price of a Honda Civic is below the blue book value of...