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Use HYSYS to solve a simple energy balance. Mixing a cold water stream (120 kg/min 30C)...

Use HYSYS to solve a simple energy balance.

Mixing a cold water stream (120 kg/min 30C) and a hot water stream (175 kg/min 65 C) then heating the streams to saturated vapor at 17 Bar. What is the duty?

Solutions

Expert Solution

The basic simulation flow sheet will appear as this

Now we will simulate the above flow sheet and obtain the result

The Heat duty reuqired is

Additional results of each stream is follows

Description
From B1 B2
To B1 B1 B2
Stream Class CONVEN CONVEN CONVEN CONVEN
Maximum Relative Error
Cost Flow $/hr
MIXED Substream
Phase Liquid Liquid Liquid Vapor
Temperature C 30 65 50.93496015 204.4077824
Pressure bar 1 1 1 17
Molar Vapor Fraction 0 0 0 1
Molar Liquid Fraction 1 1 1 0
Molar Solid Fraction 0 0 0 0
Mass Vapor Fraction 0 0 0 1
Mass Liquid Fraction 1 1 1 0
Mass Solid Fraction 0 0 0 0
Molar Enthalpy cal/mol -68173.36453 -67538.14859 -67796.54151 -56292.08635
Mass Enthalpy cal/gm -3784.196778 -3748.936935 -3763.279922 -3124.68562
Molar Entropy cal/mol-K -38.67091598 -36.69823375 -37.47400637 -12.37050865
Mass Entropy cal/gm-K -2.146562029 -2.037061525 -2.080123449 -0.686667576
Molar Density mol/cc 0.054904549 0.052981998 0.053764116 0.00042815
Mass Density gm/cc 0.989120832 0.954485523 0.968575612 0.007713238
Enthalpy Flow cal/sec -7568393.556 -10934399.39 -18502792.95 -15363037.63
Average MW 18.01528 18.01528 18.01528 18.01528
Mole Flows kmol/hr 399.6607324 582.8385681 982.4993006 982.4993006
Mole Fractions
Mass Flows kg/hr 7200 10500 17700 17700
Mass Fractions
Volume Flow l/min 121.3198591 183.3448448 304.5709559 38245.93326
Vapor Phase
Liquid Phase
<add properties>

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