quiz-solution2

quiz-solution2 - V f =(0 2(400 = 80 m 3 V g =(0 8(400 = 320...

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650:351 Thermodynamics Doyle Knight Department of Mechanical and Aerospace Engineering Rutgers - The State University of New Jersey New Brunswick, NJ USA Tel: 732 445 4464 · Email: [email protected] OFce hours: Tuesday and ±riday, 9:00 am to 11:30 am and by appointment

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Quiz No. 2 A storage tank holds 400 m 3 of saturated liquid-vapor of methane at a pressure of 1040.5 kPa. The liquid is 20% by volume and the vapor is 80% by volume. What is the total mass of methane ? What is the temperature ? What is the quality ? Solution The volumes of the liquid and vapor are
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Unformatted text preview: V f = (0 . 2)(400) = 80 m 3 V g = (0 . 8)(400) = 320 m 3 From Table B.7.1, at p = 1040 . 5 kPa, the speci±c volumes of the liquid and vapor are v f = 0 . 002794 m 3 /kg = V f m f v g = 0 . 06118 m 3 /kg = V g m g Thus, the masses of the liquid and vapor are m f = V f v f = 2 . 863 · 10 4 kg m g = V g v g = 5 . 23 · 10 3 kg 650:351 Thermodynamics Page 1 Quiz No. 2 Thus, m = m f + m g = 3 . 386 · 10 4 kg The quality is x = m g m = 0 . 154 From Table B.7.1 at p = 1040 . 5 kPa, T = 150 K 650:351 Thermodynamics Page 2...
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quiz-solution2 - V f =(0 2(400 = 80 m 3 V g =(0 8(400 = 320...

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