Engine oil is heated by flowing through a circular tube of diameter D = 50 mm and

Question:

Engine oil is heated by flowing through a circular tube of diameter D = 50 mm and length L = 25 m and whose surface is maintained at 150°C.

(a) If the flow rate and inlet temperature of the oil are 0.5 kg/s and 20°C, what is the outlet temperature

Tm,o? What is the total heat transfer rate q for the tube?

(b) For flow rates in the range 0.5 < m < 2.0 kg/s, compute and plot the variations of Tm,o and q with m. For what flow rate(s) are q and Tm,o maximized? Explain your results.

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For book-img-for-question

Fundamentals of Heat and Mass Transfer

ISBN: 978-0471457282

6th Edition

Authors: Incropera, Dewitt, Bergman, Lavine

See More Books

Question Posted: Sep 30, 2010 06:23 AM

See More Questions

A 9-cm-diameter spherical ball whose surface is maintained at a temperature of 1108C is suspended in the middle of a room at 208C. If the convection heat transfer coefficient is 15 W/m2C and the...
A 2-in-diameter spherical ball whose surface is maintained at a temperature of 170F is suspended in the middle of a room at 70F. If the convection heat transfer coefficient is 15 Btu/hft 2 F and the...
Consider a horizontal, thin-walled circular tube of diameter D = 0.025 m submerged in a container of n-octadecane (paraffin), which is used to store thermal energy. As hot water flows through the...
Bilboa Freightlines, S.A., of Panama, has a small truck that it uses for intracity deliveries. The truck is worn out and must be either overhauled or replaced with a new truck. The company has...
Presented below are changes in the account balances of Wenn Company during the year, except for retained earnings. The only entries in Retained Earnings were for net income and a dividend declaration...
In which of the four I/O software layers is each of the following done. (a) Computing the track, sector, and head for a disk read. (b) Writing commands to the device registers. (c) Checking to see if...
0.307
Marika Jonssen is the controller of Bramer Corporation, a globally competitive producer of standard and custom-designed window units for the housing industry. As part of the corporations move to...
Create a model roller coaster. Decide where the entrance starts, where each local minimum and maximum points are. The slope of each entrance and exit point must be zero in order to facilitate getting...
A piston/cylinder has a piston loaded so pressure is linear with volume and it contains 2 kg water at 100C, quality 10%. Heat is added from a 700C energy reservoir so a final state of...
Water at 20C and a flow rate of 0.1 kg/s enters a heated, thin-walled tube with a diameter of 15 mm and length of 2 m. The wall heat flux provided by the heating elements depends on the wall...
Engine oil flows through a 25-mm-diameter tube at a rate of 0.5 kg/so The oil enters the tube at a temperature of 25C, while the tube surface temperature is maintained at 100C. (a) Determine the oil...
What type of transaction will not be reflected in the statement of sources and applications of funds? Give examples.
Follows is a list of outstanding invoices at 12/31/09. List is by customer. Company: Winter Invoice: 101 Date: Amount: 4/15 300.00 155 7/1 500.00 162 10/14 600.00 197 12/16 250.00 Bradley 126 6/25...
Question 3. The acceleration of a robot as it moves along a straight line in the horizontal x-axis is given by -kt a = e (2 cos wt +3 sin wt), k = 0, w % 0, where k and w are positive constants and...
(1 pt) To find the length of the curve defined by from the point (0,0) to the point (1,9), you'd have to compute where a b= and f(x)= y=5x+4x / f(x)dx
screen. In Exercises 21 through 32, find the instantaneous rates of change of the given functions at the indicated points. 21. f(x) = 2x + 3, c = 2 22.) f(x) = -3x+4, c = 3 23. f(x) = x - 1, c = 1...
Solve . f(x)= cos(x) 2+ sin(x)
2. LO.2 Shelia purchases $50,000 of newly issued Gingo Corporation bonds for $45,000. The bonds have original issue discount (OID) of $5,000. After Sheila amortized $2,300 of OID and held the bonds...
According to a recent survey, 40% of millennials (those born in the 1980s or 1990s) view themselves more as spenders than savers. The survey also reveals that 75% of millennials view social...
What is a flame-spread rating?
A valve in a cylinder has a cross sectional area of 2 in2 with a pressure of 100 psia inside the cylinder and 14.7 psia outside. How large a force is needed to open the valve?
One pound-mass of diatomic oxygen (O2 molecular weight 32) is contained in a 100-gal tank. Find the specific volume on both a mass and mole basis (v and v).
A 30-lbm steel gas tank holds 10 ft3 of liquid gasoline, having a density of 50 lbm/ft3. What force is needed to accelerate this combined system at a rate of 15 ft/s2?
Suppose you bought a bon with an annual coupon rate of 6.5 percent one year ago for $1,032. The bond sells for $1,020 today. a. Assuming a $1,000 face value, what was your total dollar return on this...
During the year 2021, William has a job as an accountant, he earns a salary of $100,000. He has done some cleaning services work on his own (self-employed), where he earned a net income of $50,000....
Fixed cost per unit is $7 when 25,000 units are produced and $5 when 35,000 units are produced. What is the total fixed cost when 30,000 units are produced? Group of answer choices $150,000....

Engine oil is heated by flowing through a circular tube of diameter D = 50 mm and

Question:

Step by Step Answer:

KNOWN Inlet temperature and flowrate of oil flowing through a tube of prescribed surface temperature and geometry FIND a Oil outlet temperature and to...View the full answer

Fundamentals of Heat and Mass Transfer

Students also viewed these Mechanical Engineering questions