Kevin Lohr
Div 17
9/11/2015
ME 315 Laboratory
Summary Report
Experiment 1
Combined Radiation and Free Convection
Kevin Lohr
Div 17
9/11/2015
Introduction
The objective of this experiment was to measur
PROBLEM 14.1
KNOWN: Mixture of O2 and N2 with partial pressures in the ratio 0.21 to 0.79. FIND: Mass fraction of each species in the mixture. SCHEMATIC:
pO2 p N2
MO M
=
0.21 0.79
2
= 32 kg/kmol
N2 =
MASSACHUSETTS INSTITUTE OF TECHNOLOGY
DEPARTMENT OF MECHANICAL ENGINEERING
2.55 Advanced Heat Transfer
Final Exam
21 May 2012
Problem 1: Solar Collector (50 pt)
Consider an evacuated tube solar collec
ME 315
Exam 2
8:00 -9:00 PM
Tuesday, March 10, 2009
This is a closed-book, closed-notes examination. There is a formula sheet at the
back.
You must turn off all communications devices before startin
Kevin Lohr
Div 17
10/2/2015
ME 315 Laboratory
Summary Report
Experiment 2
Thermal resistance of a Finned Surface
Kevin Lohr
Div 17
10/2/2015
Introduction
The objective of this experiment was observe t
ME 315
Final Exam
Friday, May 3, 2013
This is a closed-book, closed-notes examination. There is a formula sheet
provided at the end of this exam.
You must turn off all communications devices before
PROBLEM 4.31
KNOWN: Dimensions, shape factor, and thermal conductivity of square rod with drilled interior hole.
Interior and exterior convection conditions.
FIND: Heat rate and surface temperatures.
ME 315 Fall 2015
Homework on FEHT
Assigned Tuesday, October 6, 2015
Due Monday, October 19, 2015
Problem 1: 2D steady state heat conduction (20 pts)
A rectangular flow channel is shown in the figure b
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,
PROBLEM 9.4
KNOWN: Form of the Nusselt number correlation for natural convection and fluid properties.
FIND: Expression for figure of merit FN and values for air, water and a dielectric liquid.
-1
-5
PROBLEM 4.46
KNOWN: Nodal point configurations corresponding to a diagonal surface boundary subjected to a
convection process and to the tip of a machine tool subjected to constant heat flux and conve
PROBLEM 7.47
KNOWN: Conditions associated with air in cross flow over a pipe.
FIND: (a) Drag force per unit length of pipe, (b) Heat transfer per unit length of pipe.
SCHEMATIC:
ASSUMPTIONS: (1) Stead
PROBLEM 1.4
KNOWN: Dimensions, thermal conductivity and surface temperatures of a concrete slab. Efficiency
of gas furnace and cost of natural gas.
FIND: Daily cost of heat loss.
SCHEMATIC:
ASSUMPTION
Total 10pts each
PROBLEM 6.7
KNOWN: Distribution of local convection coefficient for obstructed parallel flow over a flat
plate.
FIND: Average heat transfer coefficient and ratio of average to local a
(1) Consider steady 1D heat conduction in the trapezoidal domain shown below. The domain
extends infinitely into the page. There is a constant volumetric heat generation rate q in the
domain.
Insulati
ME 452: Machine Design II
Spring Semester 2016
Name of Student: _
Circle your Lecture Division Number:
Lecture 1
Lecture 2
ME 452 FINAL EXAM
Thursday, May 5th, 2016
OPEN BOOK AND CLOSED NOTES
For full
ME 452: Machine Design II
Spring Semester 2016
Name of Student: _
Circle your Lecture Division Number:
Lecture 1
Lecture 2
FINAL EXAM
Thursday, May 5th, 2016
OPEN BOOK AND CLOSED NOTES
For full credit
PROBLEM 1
KNOWN: Plane wall of thickness 2L, thermal conductivity k with uniform energy generation q.
For case 1, boundary at x = -L is perfectly insulated, while boundary at x = +L is maintained at T
PROBLEM 1
KNOWN: Rod (D, k, 2L) inserted into a perfectly insulating wall, exposing one-half of its length to
an airstream (T, h). An electromagnetic field induces a uniform volumetric energy generati
PROBLEM 1
KNOWN: Temperature distribution in a semi-transparent medium subjected to radiative flux.
FIND: (a) Expressions for the heat flux at the front and rear surfaces, (b) Heat generation rate q&
PROBLEM 1
KNOWN: Diameter and initial temperature of steel balls in air. Expression for the air
temperature versus time.
FIND: (a) Expression for the sphere temperature, T(t), (b) Graph of T(t) and ex
PROBLEM 3.90
KNOWN: Geometry and boundary conditions of a nuclear fuel element.
FIND: (a) Expression for the temperature distribution in the fuel, (b) Form of temperature
distribution for the entire s
PROBLEM 2.16
KNOWN: A rod of constant thermal conductivity k and variable cross-sectional area Ax(x) = Aoeax
where Ao and a are constants.
FIND: (a) Expression for the conduction heat rate, qx(x); use
PROBLEM 6.66
KNOWN: Mass transfer experimental results on a half-sized model representing an engine strut.
1/3
FIND: (a) The coefficients C and m of the correlation Sh L = CRe m
for the mass transfer
PROBLEM 3.90
KNOWN: Geometry and boundary conditions of a nuclear fuel element.
FIND: (a) Expression for the temperature distribution in the fuel, (b) Form of temperature
distribution for the entire s
ME 315 Heat and Mass Transfer Fall 2017
Homework Assignment #1
Due 08/30 (at the start of the class)
Solutions will be posted on the ME 315 Recitation Blackboard Site
Problem 1:
A glass window of widt
PROBLEM 1
KNOWN: Variation of local heat transfer coefficient around a circular collector tube.
FIND: (a) Estimate the average heat transfer coefficient, (b) Case with highest collector efficiency.
SC
Write Down Your NAME
_ , _
Last
First
Circle Your DIVISION
Div. 1
8:30 am
Naik
Div. 2
9:30 pm
Pan
Div. 3
12:30 pm
Xu
Div.4
3:30 pm
Chen
ME315 Heat and Mass Transfer
School of Mechanical Engineering
Pu
PROBLEM 1
KNOWN: Chips on a ceramic substrate operating at power levels corresponding to 50% of the critical
heat flux.
FIND: (a) Chip power level and temperature rise of the chip surface, and (b) Com
Circle your division: 1 2 3 4
Name_
Problem 1 [35 points]
(a) (9 pts) Consider a cold fluid flowing over a flat plate of uniform surface temperature. The
shape of velocity boundary layer () is shown i
PROBLEM 1
KNOWN: Evaporation rate of water from a lake.
FIND: The convection mass transfer coefficient, h m .
SCHEMATIC:
ASSUMPTIONS: (1) Equilibrium at water vapor-liquid surface, (2) Isothermal cond
Circle your division: 1 2 3 4
Name_
Problem 1 [35 points]
(a) (9 pts) Consider a cold fluid flowing over a flat plate of uniform surface temperature. The
shape of velocity boundary layer () is shown i