STATE UNIVERSITY OF NEW YORK AT BUFFALO
DEPARTMENT OF MECHANICAL & AEROSPACE ENGINEERING
MAE 336, Heat Transfer (15075, 22230, 22231)
Professor Mollendorf, PhD, FASME (335 Jarvis)
Olga Wodo, PhD (125 Bell)
Class #
Day of
Week
Date
Chapter
Material
Spring
PROBLEM 5.27
KNOWN: Dimensions and operating conditions of an integrated circuit.
FIND: Steady-state temperature and time to come within 1 C of steady-state.
SCHEMATIC:
ASSUMPTIONS: (1) Constant properties, (2) Negligible heat transfer from chip to
substr
STATE UNIVERSITY OF NEW YORK AT BUFFALO
DEPARTMENT OF MECHANICAL & AEROSPACE ENGINEERING
MAE 336, Heat Transfer (15075, 22230, 22231)
Professor Mollendorf, PhD, FASME (335 Jarvis)
Olga Wodo, PhD (125 Bell)
Class #
Day of
Week
Date
Chapter
Material
Spring
PROBLEM 4.33
KNOWN: Igloo constructed in hemispheric shape sits on ice cap; igloo wall thickness and inside/outside
convection coefficients (hi, ho) are prescribed.
FIND: (a) Inside air temperature T,i when outside air temperature is T,o = -40C assuming o
PROBLEM 4.53
KNOWN: Volumetric heat generation in a rectangular rod of uniform surface temperature.
FIND: (a) Temperature distribution in the rod, and (b) With boundary conditions unchanged, heat
generation rate causing the midpoint temperature to reach 6
PROBLEM 3.98
KNOWN: Radii and thermal conductivities of reactor fuel element and cladding. Fuel heat generation
rate. Temperature and convection coefficient of coolant.
FIND: (a) Expressions for temperature distributions in fuel and cladding, (b) Maximum
PROBLEM 3.3
KNOWN: Temperatures and convection coefficients associated with air at the inner and outer surfaces
of a rear window.
FIND: (a) Inner and outer window surface temperatures, Ts,i and Ts,o, and (b) Ts,i and Ts,o as a function of
the outside air
PROBLEM 2.42
KNOWN: Coal pile of prescribed depth experiencing uniform volumetric generation with
convection, absorbed irradiation and emission on its upper surface.
FIND: (a) The appropriate form of the heat diffusion equation (HDE) and whether the presc
PROBLEM 2.8
KNOWN: Temperature dependence of the thermal conductivity, k(T), for heat transfer through a
plane wall.
FIND: Effect of k(T) on temperature distribution, T(x).
ASSUMPTIONS: (1) One-dimensional conduction, (2) Steady-state conditions, (3) No i
PROBLEM 1.18
KNOWN: Hand experiencing convection heat transfer with moving air and water.
FIND: Determine which condition feels colder. Contrast these results with a heat loss of 30 W/m2 under
normal room conditions.
SCHEMATIC:
ASSUMPTIONS: (1) Temperatur
PROBLEM 1.33
KNOWN: Exact and approximate expressions for the linearized radiation coefficient, hr and hra,
respectively.
FIND: (a) Comparison of the coefficients with = 0.05 and 0.9 and surface temperatures which may
exceed that of the surroundings (Tsur
STATE UNIVERSITY OF NEW YORK AT BUFFALO
DEPARTMENT OF MECHANICAL & AEROSPACE ENGINEERING
MAE 336, HEAT TRANSFER
*
February 27, 2015
EXAM 1 Booklet A1
*
Question sheets must be turned-in with answer sheet.
Open book/notes.
Extra time is not allowed to f
STATE UNIVERSITY OF NEW YORK AT BUFFALO
DEPARTMENT OF MECHANICAL & AEROSPACE ENGINEERING
MAE 336, HEAT TRANSFER
*
May 6, 2015
EXAM 3 Booklet 1
*
Question sheets must be turned-in with answer sheet.
Open book/notes.
Extra time is not allowed to fill-out bu
STATE UNIVERSITY OF NEW YORK AT BUFFALO
DEPARTMENT OF MECHANICAL & AEROSPACE ENGINEERING
MAE 336, HEAT TRANSFER
*
April 8, 2015
EXAM 2 Booklet A1
*
Question sheets must be turned-in with answer sheet.
Open book/notes.
Extra time is not allowed to fill-
PROBLEM 5.44
KNOWN: One-dimensional wall, initially at a uniform temperature, Ti, is suddenly exposed
to a convection process (T , h). For wall #1, the time (t1 = 100s) required to reach a specified
temperature at x = L is prescribed, T(L1, t1) = 315 C.
F