A multistream heat exchanger model with enthalpy feasibility

作者：Tak Kyungjae; Kwon Hweeung; Park Jaedeuk; Cho Jae Hyun; Moon Il^*

来源：Computers & Chemical Engineering, 2018, 115: 81-88.

DOI：10.1016/j.compchemeng.2018.03.023

• Pinch analysis
• Equation-oriented optimization
• LNG plant
• Single mixed refrigerant process
• PRICO process

A temperature feasibility constraint is an important part of multistream heat exchanger (MSHE) modeling. However, temperature feasibility of an MSHE model makes a numerical issue when a physical property package is used to obtain highly accurate temperature-enthalpy relationships in equation-oriented modeling environment. To resolve the issue, this study proposes a new MSHE model with enthalpy feasibility using the fact that enthalpy is a monotonically increasing function of temperature. A natural gas liquefaction process, called a single mixed refrigeration process, is optimized using the proposed MSHE model under an equation-oriented modeling environment with a physical property package as a case study.

• 出版日期2018-7-12