
Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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Chapter 9, Problem 6P
To determine
Find the maximum wavelength of the light that produces output from a photovoltaic device manufactured from a semiconductor with an energy gap of 1.02 eV.
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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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