Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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Chapter 9, Problem 3P
To determine
Find the annual production of energy for the installation of photovoltaic panels.
Find the coal requirement for replacing photovoltaic panels by thermal plant.
Find the annual reduction of
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The 4-story building shown below has a dead load D = 90 psf, floor live load, L = 110 psf. The roof and floors have the same D and L loads. The length of columns is 24 ft at the ground level and 12 ft for all other floors. The column ends are pins (Kx = Ky = 1.0) and Lx = Ly for all columns. (Use LFRD Method where applicable).1) Determine Pu on interior columns B2-4, B2-1, and side column C1-1 2) Use Table 4-1a (p. 4-12 to 4-24) in AISC to select the lightest W shapes for these columns 3) Use Table 4-4 (p. 4-68 to 4-83) in AISC to select lightest square HSS shape for the columns
The 4-story building shown below has a dead load D = 90 psf, floor live load, L = 110 psf. The roof and floors have the same D and L loads. The length of columns is 24 ft at the ground level and 12 ft for all other floors. The column ends are pins (Kx = Ky = 1.0) and Lx = Ly for all columns. Determine Pu on interior columns B2-4, B2-1, and side column C1-1 (Use LFRD where applicable).
Problems
5-1 Stead flow of steam enters a condenser with an enthalpy of 2400 kJ/kg and a velocity of
366 m/sec. the condensate leaves the condenser with an enthalpy of 162kJ/sec and a
velocity of 6 m/sec what is the heat transferred to the cooling water per kg steam
condensed.
(-69198 kJ/kg)
5-2 An air compressor delivers 4.5 kg of air per minute at a pressure of 7 bar and a
specific volume of 0.17 m³ /kg. Ambient conditions are pressure 1bar and specific
volume 0.86 m³/kg. The initial and final internal energy values for the air are 28 kJ/kg
and 110 kJ/kg respectively. Heat rejected to the cooling jacket is 76kJ/kg of air
pumped. Neglecting changes in kinetic and potential energies, what is the shaft power
required driving the compressor?
(14.3kW)
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