Energy Systems
Assignment 3
5/2011
1. A compressor takes 0.5 kg/s of hydrogen from 300 K, 100 kPa, to 400 K and 1200 kPa.
Assuming the surroundings are at 25 C and the compressor is reversible, what is the required
input power? Assume perfect gas behavior
Energy Systems
2017
Assignment Ex-1
1. Helium is expanded from 10 atm and 650 K to 1 atm at a rate of 1 kg/s. Assume an ideal gas
with constant specific heat and the surroundings are at 25 C. cp = 5.2 kJ/kg-K.
a. If a perfect (isentropic) expander is used
Energy Systems
Assignment El-1
6/4/2017
1. Using the DOE Electricity Market Module Data Table 8.2 determine the second law
efficiency for a biomass plant, coal IGCC with carbon sequestration, and advanced nuclear
for both 2013 and nth-of-a-kind heat rates
Energy Systems
Assign El-3
6/22/2017
A residential load is served by a jurisdiction with a tariff structure based on hourly average
demand. When demand is 5 kW or less, the price of energy is 70 $/MWh. When demand exceeds
5 kW, the price of the energy (al
Energy Systems
6/13/2017
Assign El-2
Assume you have generators with screening curves given by the following: PC = pulverized
coal, IGCC = integrated gasification combined cycle (coal), GT = simple cycle gas turbine.
400
Cost [$/kWins -yr]
350
300
PC
IGCC
Energy Systems
Quiz #3
NAME:_
8/22/2016
SN:_
This quiz is closed book (text and notes).
You may use a calculator.
Please write legibly and show your work part marks will be given.
i
Capital Recovery Factor, CRF. CRF
1 (1 i) N
Future Value, F, Present Val
Energy Systems
Assignment Ex-1
2017
1. Helium is expanded from 10 atm and 650 K to 1 atm at a rate of 1 kg/s. Assume an ideal gas
with constant specific heat and the surroundings are at 25 C. cp = 5.2 kJ/kg-K.
a. If a perfect (isentropic) expander us used
Energy Systems
2017
Assignment Ex-2
1. The interior of a building is maintained at 20 C while the outdoor temperature is 5 C. The
heat leak from the building is 1 kW. Electricity costs 0.10 $/kWh.
a. What is the minimum work input required to the heating
Energy Systems
6/27/2017
Assign El-3
A residential load is served by a jurisdiction with a tariff structure based on hourly average
demand. When demand is 5 kW or less, the price of energy is 70 $/MWh. When demand exceeds
5 kW, the price of the energy (al
Energy Systems
6/13/2017
Assignment El-1 Solutions
1. Using the DOE Electricity Market Module Data Table 8.2 determine the second law
efficiency for a biomass plant, coal IGCC with carbon sequestration, and advanced nuclear
for both 2015 and nth-of-a-kind
Energy Systems
Assignment Ex-2
2017
1. The interior of a building is maintained at 20 C while the outdoor temperature is 5 C. The
heat leak from the building is 1 kW. Electricity costs 0.10 $/kWh.
a. What is the minimum work input required to the heating
Energy Systems
6/20/2017
Assign El-2 Solutions
Assume you have generators with screening curves given by the following: PC = pulverized
coal, IGCC = integrated gasification combined cycle (coal), GT = simple cycle gas turbine.
400
Cost [$/kWins -yr]
350
3
Energy Systems
Assign 5 Solution
7/8/2011
1. Using the data in Table 38, lecture 17, determine the second law efficiency for a biomass
plant, coal IGCC with carbon sequestration, and advanced nuclear for both 2007 and nth-ofa-kind heat rates. Assume the h
Energy Systems
Assignment 4
5/2011
1. Assuming that biomass has an average exergy content of 20 MJ/kg and the average density is
30 tonnes/ha, estimate the minimum annual cultivated area to satisfy annual world energy
demand if biomass is converted to cur
Energy Systems
Assignment 2
5/2011
1. Assume the atmospheric concentration of CO2 is 390 ppm in 2010, the land sink is constant
at 2.7 GtCO2/yr, and the ocean sink is constant at 7.3 GtCO2/yr. The anthropogenic emission
rate in 2010, I0, is assumed to be
Energy Systems
Assignment 2
5/2011
Using your model for the Kaya identity:
1. Assume the atmospheric concentration of CO2 is 390 ppm in 2010, the land sink is constant
at 2.7 GtCO2/yr, the ocean sink is constant at 7.3 GtCO2/yr. 1.
a. Determine the atmosp
Energy Systems
Assignment 1
5/17/2011
1. Assuming annual variations in forces are constant and equal to the values given in Table 1, and the
emissions rate in 2010 was 9 BtC/yr, estimate the anthropogenic emissions rate in 2050 and 2100.
Table 1. Assumed
Energy Systems
Assignment 1
5/18/2011
The following Figures may help you trouble-shoot your model.
1.8
1.6
1.4
1.2
1
2010 2020 2030 2040 2050 2060 2070 2080 2090 2100
Year
1000
4
500
2
Temperature Change [K]
Concentration CO2 [ppm]
Relative Emission Rate
Energy Systems
Assignment 1
5/8/2011
Anthropogenic Emissions of CO2
Relative anthropogenic emissions intensity is the emission rate in any future year (IN) relative to a
reference year (I0). Knowing the annual variation in emissions intensity, i, allows o
Energy Systems
Quiz #3
NAME:_
7/28/2016
SN:_
This quiz is closed book (text and notes).
You may use a calculator.
Please write legibly and show your work part marks will be given.
i
Capital Recovery Factor, CRF. CRF
1 (1 i) N
Future Value, F, Present Val
Energy Systems
Assignment 6
7/7/2011
1. Assume you have generators with screening curves given by the following:
800
PC
GT
Adv Nucl
Cost [$/kWinstalled-yr]
700
600
500
400
300
200
100
0
0
0.2
0.4
0.6
Capacity Factor
0.8
1
Using the given data file for the