1 ( 80 pts)
2 ( 20 pts)
Total ( 100 pts)
ME 336
Winter 2012
Midterm Exam 1
Prof. Angela Violi
February 23rd, 2012 (9:00am10:30am)
Open textbook
18.5 x 11 sheet (double sided) formula sheet
Calculator
Closed notes
No computers
Honor code will be enforce
Q1 A rigid vessel contains R134a at specified temperature. The pressure, total internal energy, and the
volume of the liquid phase are to be determined.
Analysis (a) The specific volume of the refrigerant is
v
V
m
0.5 m3
0.05 m3 /kg
10 kg
R134a
10 kg

ME336 Thermodynamics II
QUIZ 2
April 2 2012
Prof. A. Violi
PRINT NAME:
_
HONOR CODE PLEDGE SIGNATURE: _
1. Humid air is cooled, dehumidified and reheated during an isobaric process. Which
one of the
ME336 Thermodynamics II
QUIZ 1
January 24, 2012
Prof. A. Violi
PRINT NAME: _
population of the state. The formula to determine the relative population of
states of various energies is called the Boltzmann distribution.
Suppose two states differ in energy
Q1 A 280MW combined gassteam power plant is considered. The topping cycle is a gas turbine cycle and the
bottoming cycle is a nonideal Rankine cycle with an open feedwater heater. The mass flow rate of air to steam, the
required rate of heat input in t
1 ( 80 pts)
2 ( 20 pts)
Total ( 100 pts)
ME 336
Winter 2012
Midterm Exam 1
Prof. Angela Violi
February 23rd, 2012 (9:00am10:30am)
Open textbook
18.5 x 11 sheet (double sided) formula sheet
Calculator
Closed notes
No computers
Honor code will be enforce
Q1 A steam power plant that operates on an ideal regenerative Rankine cycle with a closed
feedwater heater is considered. The temperature of the steam at the inlet of the closed feedwater
heater, the mass flow rate of the steam extracted from the turbine
Q1 A geothermal heat pump with R134a as the working fluid is considered. The evaporator inlet and exit states are
specified. The mass flow rate of the refrigerant, the heating load, the COP, and the minimum power input to the
compressor are to be determi
Q1 A pistoncylinder device initially contains saturated liquid water. An electric resistor placed in the tank
is turned on until the tank contains saturated water vapor. The volume of the tank, the final temperature,
and the power rating of the resistor