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>

Amanda K answered 1 year ago

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