kabuhakmeh3_hw4 - ChBE 2120 Homework 4 Solutions a As the...

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ChBE 2120 Homework 4 Solutions February 28, 2011 a) As the conversion gets lower, the heat duty increases / becomes more positive / less negative. b) As the outlet temperature increases, the heat duty increases / becomes more positive / less negative. Conversely, as the outlet temperature decreases, the heat duty decreases / becomes less positive / more negative. -­૒5.00E+08 -­૒4.00E+08 -­૒3.00E+08 -­૒2.00E+08 -­૒1.00E+08 0.00E+00 1.00E+08 2.00E+08 3.00E+08 4.00E+08 0 20 40 60 80 100 120 HeatDuty(kJ/h) Propane Conversion Rate (%) Heat Duty (kJ/h) vs. Conversion Rate (%) -­૒7.00E+08 -­૒6.00E+08 -­૒5.00E+08 -­૒4.00E+08 -­૒3.00E+08 -­૒2.00E+08 -­૒1.00E+08 0.00E+00 0 200 400 600 800 1000 1200 1400 1600 HeatDuty(kJ/h) Product Stream Temperature (°C) Heat Duty (kJ/h) vs. Temperature( °C)
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ChBE 2120 Homework 4 Solutions February 28, 2011 c) When conversion is a function of temperature, there is little change in the heat duty observed in part b at temperatures of 1000 ° C or above. However, as the temperature is decreased, the heat duty increases / becomes more positive / less negative. This can be attributed to the lower
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