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Retrofitting of HEN Using Combined Pinch & Exergy Analysis
Industry: Steam Power Plant
Challenge
This project consists of retrofitting of heat exchangers network (HENs) in a steam plant. By using the most advanced Combined Pinch and Exergy Analysis, 150,000 ($/yr) energy saving was realized.
- 1. Reduction in Boilers Load: 11.529 MW
2. Reduction in Fuel consumption: 1,039.52 Nm3/h
3. Reduction in Condenser Load: 18.791MW
4. Increase in Cycle efficiency: 0.85 %
5. Condenser Conservation Profits: 38,266 $/yr
6. Fuel Consumption Conservation Profits according to the first scenario: 151,750 $/yr
7. Fuel Consumption Conservation Profits according to the second scenario: 30,356 $/yr
8. Total Energy Conservation Profits according to the first scenario: 190,016 $/yr
9. Total Energy Conservation Profits according to the second scenario: 68,621 $/yr
10. Additional Area: 511.6 m2
11. Area Efficiency: 79.72 %
12. Investment: 145,886 $
13. Payback Period according to the first scenario: 8 months
14. Payback Period according to the second scenario: 25 months
Proposed Solution
Results
Energy Saving
(%)
OPEX Saving
($/yr)
Investment
($)
Payback Period (month)
16
190,016
145,886
9
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