Process Equipment Cost Estimation-Heat-Exchanger
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CostEstimationOfAHeat
Exchanger
Group Members
Chinthaka Perera
Chris Peng
Sandy Lee
Terry Peters540:343 Engineering Economics Spring 1998
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Outline
Introduction and Problem Definition
Designs of Heat Exchangers
Base Cost Estimation
Complete Cost Estimation
Conclusions & Recommendation Questions
540:343 Engineering Economics Spring 1998
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Problem Definition
Heat cold water from 15o
C to 85o
Cusing the minimum resources
Area Limited to 50 square meters
Minimize the cost of operation and
maintenance of the machine
540:343 Engineering Economics Spring 1998
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Efficiency: 48%
Power: 7.317x10 5Watts
Length of Pass: 4.7 meters, Life Cycle 5 yr.
540:343 Engineering Economics Spring 1998
Shell And Tube Heat Exchanger
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Counter Flow Heat Exchanger
Efficiency: 48%
Power: 7.317 x 105Watts
Length 129.55 meters, 8 revolutions, Life Cycle: 5yr.
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Cross Flow Heat Exchanger
Efficiency: 61%
Power:2.92 x 105Watts
Area: 28.4 square meters, Tubes: 7898, Life Cycle 25 yr.
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Summary of Designs
Power
(Watts)
Life
Cycle
Efficiency
Shell &
Tube
7.137 E5 5 yrs 48 %
Counter
Flow
7.137 E5 5 yrs 48 %
Cross
Flow
2.92 E5 25 yrs 61 %
540:343 Engineering Economics Spring 1998
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Base Cost Estimating Technique
Base Cost= Cost of Materials to Construct Heat Exchanger
+ Cost Of Installation of Heat Exchanger
Conversion of Base Cost to Annual Worth using MARR = 10%AWHeat Exchanger= (Base Cost) x (A/P,10%,Life Cycle)
540:343 Engineering Economics Spring 1998
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Base Cost Estimation Of Heat
Exchanger Designs
Using Annual Worth and assuming repeatability
AWShell and Tube= - $ 14400
AWCounter flow = - $ 63400
AWCross flow
= - $2200
Best Alternative for Heat Exchanger is
Cross Flow Heat Exchanger540:343 Engineering Economics Spring 1998
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Complete Cost Estimating Technique
Complete Cost= Base Cost + Operation and Maintenance
Conversion of Complete Cost to Annual Worth using MARR = 10%
AWHeat Exchanger= (Base Cost) x (A/P,10%,Life Cycle) +
(O & M) x (A/P,10%,Life Cycle)
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Complete Cost Estimation
Base Cost of Cross Flow Heat Exchanger - $ 2200
Operation and Maintenance Cost + Cost of Gas - $ 2300
540:343 Engineering Economics Spring 1998
Total Cost Over Life Cycle - $ 4500
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Conclusions & Recommendation
Cross Flow Heat Exchanger is the most
effective for the purpose
Cross Flow Heat Exchanger is the most Cost
Effective
Aside:
The Shell & Tube and Counter flow reused waste to heatwater.
540:343 Engineering Economics Spring 1998
Recommendation : Cross F low Heat Exchanger
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Questions ??
Design of Heat Exchanger??
Base Cost Estimating Technique??
Complete Cost Estimation??
Choice of Heat exchanger ??
540:343 Engineering Economics Spring 1998
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