COURSE:
PROBLEM SET:
ME452: Principles of Heat Transfer
Homework Assigment #7-2
DATE:
12/01/10
PREPARED BY:
Richard Ayala
PAGE
1 OF 3
Water at a flow rate of m = 0.215 kg/s is cooled from 70C to 30C by passing it through a thin-walled tube of diameter D =

ME452 Principles of Heat Transfer
Spring 2016
HW #6/7
(Due 4/21/16)
1.
Water at 40C flows across a flat plate whose surface temperature is held constant at 115C. If
the temperature gradient at the plates surface for a given value of x is 45C/mm, what are

COURSE:
PROBLEM SET:
ME452: Principles of Heat Transfer
DATE:
Homework Assigment #7-1
12/01/10
PREPARED BY:
PAGE
Richard Ayala
1 OF 2
Engine oil flows through a 25-mm diameter tube at a rate of 0.5 kg/s. The oil enters the tube at a temperature of 25C, wh

COURSE:
PROBLEM SET:
ME452: Principles of Heat Transfer
DATE:
Homework Assigment #63
PREPARED BY:
11/17/10
Richard Ayala
PAGE
1 OF 2
A preheater involves the use of condensing steam at 100C on the inside of a bank of tubes to heat air that enters at 1 atm

COURSE:
PROBLEM SET:
ME452: Principles of Heat Transfer
DATE:
Homework Assigment #62
11/17/10
PREPARED BY:
PAGE
Richard Ayala
1 OF 1
Consider a hot automotive engine, which can be modeled as a 0.5-m high, 0.40-m wide, and 0.8-m long rectangular block.
The

COURSE:
PROBLEM SET:
ME452: Principles of Heat Transfer
Homework Assigment #53
DATE:
10/20/10
PREPARED BY:
Richard Ayala
PAGE
1 OF 1
A very thick slab with thermal diffusivity 5.6 10 -6 m2/s and thermal conductivity 20 W/m-K is initially at a uniform
temp

COURSE:
PROBLEM SET:
ME452: Principles of Heat Transfer
Homework Assigment #52
DATE:
03/22/10
PREPARED BY:
Richard Ayala
PAGE
1 OF 2
A fuel element in of a nuclear reactor is in the shape of a plane wall of thickness 2L = 20 mm is initially at a uniform
t

COURSE:
PROBLEM SET:
ME452: Principles of Heat Transfer
Homework Assigment #51
DATE:
10/20/10
PREPARED BY:
Richard Ayala
PAGE
1 OF 1
A long cylindrical wood log (k = 0.17 W/m-K and = 1.28 10 -7 m2/s) is exposed to hot gases at 550C in a fireplace. The
log