## Transcribed Text

1. Using the steam tables in the back of your textbook, determine the following properties of
water: [24 points]
(a) the specific entropy [in Btu/lbm·°F] for saturated vapor conditions at 6 psia;
(b) the specific volume [in m3
/kg] at 75°C and a quality of 70%;
(c) the specific enthalpy [in Btu/lbm] at 1300 psia and 800°F;
(d) the amount of heat [in kJ/kg] required to boil water at atmospheric pressure (this is
known as the specific latent heat of vaporization);
(e) the density [in lbm/ft3
] at 480°F and a quality of 0.45;
(f) the steam quality at 260°F for a specific entropy of 1.3043 Btu/lbm·°F;
(g) the specific entropy [in kJ/kg·K] at 225 bar and 550°C; and
(h) the specific enthalpy [in Btu/lbm] at 1000 psia and 560°F.
Be sure to show all your work including any interpolations needed. You might want to check your
answers using the Matlab functions XSteam.m and XSteamUS.m (available at Mathworks.com),
but be sure that your submitted answers are based on the data from the back of the textbook.
2. The U.S. Department of Energy (DOE) Energy Information Administration (EIA) produces a
Monthly Energy Review. Download the Excel file with the Electricity Net Generation: Total (all
sectors) annual data.
(a) Plot the electricity generation for all the individual sectors versus time (1949-2014). Your
graph should look similar to that below, except that there will be ~12 sectors. (Please don’t
forget the fundamentals of engineering graphs: labels, units, etc.) [12 pts]
(b) For 2004 and 2014, what were the six largest fuel sources for electricity, and what
percentage of the total does each of these 6 sources represent? What is the total percentage
from all 6 of these sources? Make a table like that below to report your answers. [7 pts]
Rank
Six Largest Fuel
Sources for Electricity
in the U.S. for 2004
Fuel Source Percentage
of Total Electricity
Generation for 2004
Six Largest Fuel
Sources for Electricity
in the U.S. for 2014
Fuel Source Percentage
of Total Electricity
Generation for 2014
1. % %
2. % %
3. % %
4. % %
5. % %
6. % %
Total (for 2004): % Total (for 2014): %
(c) Determine the annual percentage growth/decline for the past 5 years in total electricity
generation, that is, complete the following table: [5 pts]
Period Growth (+) / Decline (–)
2009 to 2010 %
2010 to 2011 %
2011 to 2012 %
2012 to 2013 %
2013 to 2014 %

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Problem-1)

(a)From steam tables, the specific entropy of saturated steam at 6psia is,

1.8295 Btu/lbm-oF.

(b) 75 degree Celsius is same as 167 degree fahrein heit,

Corresponding to the above saturation temperature conditions, the specific volume of saturated vapor (vg) is 65.5 m3/kg. Corresponding (vfg) is 65.5m3/kg and (Vf) is 0.01643 m3/kg...