1. Pinch Technology

2. Pinch technology 개요 Pinch technology systematic methodology for energy saving in processes and total sites Energy target Cross pinch Heat exchanger network design Column target ⇒ New Design & Retrofit

3. Pinch technology 소개 Energy Target, Cross Pinch 관련 1. Data Extraction 2. Composite Curve 작성 3. Targeting for multiple utilities 4. Grand Composite Curve 5. Energy Target 설정 6. Optimization of ΔT min

4. 1. Data Extraction Heat Exchanger ⇒ Rebolier, Condenser 포함 ExchangerStreamT in T out Heat DutyMatch 열교환기 1 Feed preheater 10606.1P-P 열교환기 2 Feed preheater2 82.868.5-6.1P-P 열교환기 3 Steam Generator 166.22062.9MPS

5. 2. Composite Curve Hot composite curve

6. Composite Curve Cold composite curve

7. Composite Curve Energy Balance Heat RecoveryHot Utility(Steam) Cold Utility(CW)

8. 3.Targeting for Multiple Utilities 새로운 utility level 을 사용시 composite curve 가 복잡 한 형태로 변함. ⇒ Grand Composite Curve!

9. 4. Grand Composite Curve Tool that is used for setting multiple utility Shifted composite curve : utility level 이 GCC 와 만나는 경우에도 utility 와 process stream 간에 ΔT min 을 유지하기 위함

10. Multiple utility targetting with grand composite curve 경제성을 고려한 적절한 utility level 을 선정하고 주어 진 utility level 을 targetting 하는데 사용

11. Typical ΔT min values for various types of process NoIndustrial SectorΔT min 1Oil Refining20-40ºC 2Petrochemical10-20ºC 3Chemical10-20ºC 4Low Temperature Processes3-5ºC

12. Pinch principle Heat must not be transferred across the pinch There must be no external cooling above the pinch There must be no external heating below the pinch

13. Pinch Principle

14. Cross Pinch