FINAL PROJECT
ME 4110 – Thermal System Design
Mechanical Engineering Department - PUPR
Due: Feb 9, 2017
ENERGY CONSERVATION USING A NETWORK OF HEAT EXCHANGERS
In many industrial plants are cold streams that must be heated and hot streams that must be cooled.
One particular plant has three streams to be heated (see table 1) and three streams to be cooled (see
table 2). Cooling water (90oF supply, 155oF return) and steam (saturated at 150 psia) are available. Note
that the saturated steam at 153 psia has a temperature of 360oF. Design a network of heat exchangers
that will make full use of heating and cooling stream against each other, using utilities only if necessary.
Take note that is not advantageous to use steam to do all the heating and the cooling water to do all the
cooling.
Table #1: Streams to be heated
Stream Flow-rate,
lb/h Tin, oF Tout, oF
1. Benzene 50, XXXXXXXXXX
2. Acetone 60, XXXXXXXXXX
3. Heptane 80, XXXXXXXXXX
Table #2: Streams to be cooled
Stream Flow-rate,
lb/h Tin, oF Tout, oF
4. Cyclohexane 60, XXXXXXXXXX
5. Octane 40, XXXXXXXXXX
6. Decane 35, XXXXXXXXXX
Your report must include:
1. Assumptions well explained
2. A schematic of the interconnected network of heat exchangers. Identify how much cooling water or
steam you are using.
3. Consider the design of Double Pipe Heat Exchangers: nominal pipe diameters, location of fluids,
flow configuration, tube length, UA of each heat exchanger, effectiveness, and other relevant
information.
Additionally, a group presentation of your findings will be giving (no more than 10 min presentations).
Jorge E Carranza, PhD, PE
Document Preview: FINAL PROJECT
ME 4110 – Thermal System Design
Mechanical Engineering Department - PUPR
Due: Feb 9, 2017
ENERGY CONSERVATION USING A NETWORK OF HEAT EXCHANGERS
In many industrial plants are cold streams that must be heated and hot streams that must be cooled.
One particular plant has three streams to be heated (see table 1) and three streams to be cooled (see
o o
table 2). Cooling water (90 F supply, 155 F return) and steam (saturated at 150 psia) are available. Note
o
that the saturated steam at 153 psia has a temperature of 360 F. Design a network of heat exchangers
that will make full use of heating and cooling stream against each other, using utilities only if necessary.
Take note that is not advantageous to use steam to do all the heating and the cooling water to do all the
cooling.
Table #1: Streams to be heated
Flow-rate,
o o
Stream Tin, F Tout, F
lb/h
1. Benzene 50,000 70 240
2. Acetone 60,000 80 150
3. Heptane 80,000 90 200
Table #2: Streams to be cooled
Flow-rate,
o o
Stream Tin, F Tout, F
lb/h
4. Cyclohexane 60,000 230 120
5. Octane 40,000 200 80
6. Decane 35,000 190 90
Your report must include:
1. Assumptions well explained
2. A schematic of the interconnected network of heat exchangers. Identify how much cooling water or
steam you are using.
3. Consider the design of Double Pipe Heat Exchangers: nominal pipe diameters, location of fluids,
flow configuration, tube length, UA of each heat exchanger, effectiveness, and other relevant
information.
Additionally, a group presentation of your findings will be giving (no more than 10 min presentations).
Jorge E Carranza, PhD, PE