Cost Estimation Of A Heat Exchanger Group Members Chinthaka Perera Chris Peng Sandy Lee Terry Peters 540:343 Engineering Economics Spring 1998.

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Presentation transcript:

Cost Estimation Of A Heat Exchanger Group Members Chinthaka Perera Chris Peng Sandy Lee Terry Peters 540:343 Engineering Economics Spring 1998

Outline Introduction and Problem Definition Designs of Heat Exchangers Base Cost Estimation Complete Cost Estimation Conclusions & Recommendation Questions 540:343 Engineering Economics Spring 1998

Problem Definition Heat cold water from 15 o C to 85 o C using 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

Efficiency: 48% Power: 7.317x10 5 Watts Length of Pass: 4.7 meters, Life Cycle 5 yr. 540:343 Engineering Economics Spring 1998 Shell And Tube Heat Exchanger

Counter Flow Heat Exchanger Efficiency: 48% Power: x 10 5 Watts Length meters, 8 revolutions, Life Cycle: 5yr. 540:343 Engineering Economics Spring 1998

Cross Flow Heat Exchanger Efficiency: 61% Power:2.92 x 10 5 Watts Area: 28.4 square meters, Tubes: 7898, Life Cycle 25 yr. 540:343 Engineering Economics Spring 1998

Summary of Designs 540:343 Engineering Economics Spring 1998

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% AW Heat Exchanger = (Base Cost) x (A/P,10%,Life Cycle) 540:343 Engineering Economics Spring 1998

Base Cost Estimation Of Heat Exchanger Designs Using Annual Worth and assuming repeatability AW Shell and Tube = - $ AW Counter flow = - $ AW Cross flow = - $2200 Best Alternative for Heat Exchanger is Cross Flow Heat Exchanger 540:343 Engineering Economics Spring 1998

Complete Cost Estimating Technique Complete Cost = Base Cost + Operation and Maintenance Conversion of Complete Cost to Annual Worth using MARR = 10% AW Heat Exchanger = (Base Cost) x (A/P,10%,Life Cycle) + (O & M) x (A/P,10%,Life Cycle) 540:343 Engineering Economics Spring 1998

Complete Cost Estimation Base Cost of Cross Flow Heat Exchanger - $ 2200 Operation and Maintenance Cost + Cost of Gas - $ :343 Engineering Economics Spring 1998 Total Cost Over Life Cycle - $ 4500

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 heat water. 540:343 Engineering Economics Spring 1998 Recommendation : Cross Flow Heat Exchanger

Questions ?? Design of Heat Exchanger…?? Base Cost Estimating Technique…?? Complete Cost Estimation…?? Choice of Heat exchanger …?? 540:343 Engineering Economics Spring 1998