#1 (30 points-10 Points each for A, B and C) A. What is the total annual energy
ID: 3280595 • Letter: #
Question
#1 (30 points-10 Points each for A, B and C) A. What is the total annual energy use for the following 2 loads; 8500 W refrigerator/freezer year-around and 6 kW Air conditioner 24/7 for 8 month a year (365.25 days per year and 30.4 days per month) B. A container weighs 863 N when filled with water and 49 N when empty. How much water does the container hold in cubic meters? ( = 1000 Kg/m2, g-981 m/s) C. If a barometric pressure with Mercury as the measurement fluid has reading is 29.9 inches of Hg (S.G.-13.6), determine the pressure (in kPa) and reading in meter for water as the measurement fluid. ( = 1000 Kg/m3 r6241bmExplanation / Answer
A] Energy usage = 8500*365.25*24*3600 + 6000*8*30.4*24*3600
= 394314480000 J
= 3.943*10^11 J answer
B] Weight of water = 863 - 49 = 814 N
mass of water = 814/9.8 = 83.06 kg
volume = mass/density = 83.06/1000
= 0.08306 m^3 answer
c] 29.9 inches of Hg = 29.9/12*0.3048 m of Hg
pressure = rho g h = 13.6*1000*9.8*29.9/12*0.3048 = 101221 Pa = 101.2 kPa answer
length for water = 101221/(1000*9.8) = 10.33 m answer
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