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A PV battery system has an end-to-end efficiency of 77%. The system is used to run an all-AC load that is run only at night. The charge controller efficiency is 96% and the inverter efficiency is 85%. How much energy will need to be gathered by the PV array if the load is 120 watts running for 4 hours per night?
a student takes a multiple choice exam with 10 questions each with 5 possible selections for the answer. suppose that
II. There are at least two approaches to system development, a variety of life cycles, and a long list of techniques and models that are used in some approaches but not in others. Consider why this is so. Discuss these possible reasons (at leas..
uniform beam with 2 supports has a total length l. pinned at a and roller at b. force f is applied at the center of the
Water at standard atmospheric pressure and temperature fills a sealed, rigid container. If the temperature of the water is increased by 50°C, what is the pressure? Assume that the coefficients of compressibility and thermal expansion are constant
a stream of refrigerant-134a at 1 mpa and 12 c is mixed with another stream at 1 mpa and 60 c. if the mass flow rate of
A quantity of water within a piston-cylinder assembly executes a carnot power cycle. During ISOTHERMAL expansion, the water is heated from saturated liquid at 45 bar until it is a saturated vapor. The vapor then expands adiabatically to a pressure of..
Sketch Bode plots for the following systems. Use asymptotes, but locate at least one point in the Magnitude plot and make sure to calculate zeta for complex peaks.
an air conditioner operating at steady-state takes in moist air at 27 oc 1 bar and 70 relative humidity. the moist air
turbo booster toy that launches a 60-gram insect glider projectile by compressing a helical spring and then releasing
If the concentration difference for diffusion across a thin film is doubled, what happens to the flux? If the diffusion coefficient across a thin film is doubled, what happens to the flux?
Determine Compressor Size in Watts that is suitable to satisfy certain specific needs, The drinking water needs in a production facility with 20 employees is to be met by a water bubbler type water fountain.
Calcium oxide (CaO) is formed by decomposing limestone (pure CaCO3). In one kiln the reaction goes to 70% completion. What is the composition (by mass) of the solid product (CaO) withdrawn from the kiln? (Hint: there will be two separate product s..
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