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Consider a building whose annual air conditioning load is estimated to be 120,000 kWh in an area where the unit cost of electricity is $0.10/kWh. Two air conditioners are considered for the building. Air conditioner A has a seasonal average COP of 3.2 and costs $5500 to purchase and install. Air conditioner B has a seasonal average COP of 5.0 and costs $7000 to purchase and install. All else being equal, determine which air conditioner is a better buy.
a power plant generates 150 mw of electrical power. it uses a supply of 1000 mw from a geothermal source and rejects
how to calculate the adiabatic flame temperatures from the injection pressures during choked conditions.
calculate the minimum possible magnitude u of the muzzle velocity which a projectile must have when fired from point a
a particle which moves in two-dimensional motion has coordinates given in inches by x t2 - 4t 20 and y 3 sin 2t
a four cylinder two stroke diesel engine has a cut-off ratio of 1.8 and a compression ratio of 22. it operates with an
consider an air-water mixture of total pressure of 100 kpa and temperature of 20c and relative humidity of 59 that goes
hot air at 800c is blown over a 2-m x 4-m flat surface at 300c. if the average convection heat transfer coefficient is
descriptive questions - give brief answers in words. no calculations are required. you may write your answers in point
Consider a cold air-standard Diesel cycle. Operating data at principal states in the cycle are given in the table below.For k=1.4 Cv=0.718kJ/(kg*k), and Cp= 1.005 kJ/(kg*K)
determine the phase or phases in a system consisting of h2o at the following conditions sketch p-v and t-v diagrams
Use Psychrometric chart to determine Latent portion
3-21m for the flud power automobile lift system of figure 3-35 the air pressure equals 550 kpa gage. if the hydraulic
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