Pinch Analysis: Entropy and Future Retrofit

Today, the world's energy supply, production economy and environmental regulations manage industries around the world. This defines the need for energy conservation, reduction of carbon dioxide emissions, and next-generation environmental protection. As a result, engineers began to propose tools and technological innovations to reduce energy usage. Pinch analysis is a tool used to design heat exchanger network (HEN) with less energy usage. This article focuses on pinch analysis and applies the second law of thermodynamics.

Smith et al. (2010) have studied ways to improve HEN based on pinch analysis. They developed the method of Asante and Zhu (1997). It consists of two steps: structure change and cost optimization step - one step. Depending on the temperature close to the actual situation, the thermal performance of the flow also improves. This design approach avoids the lack of a cost-effective design

Significant advances have been made in this area, especially by synthesizing heat exchanger networks using the "pinch technique" (now also called "pinch analysis") and integrating them with the rest of the process system. Many organizations either offer computer programs to improve existing systems or design this new approach using this approach. Heat recovery (more precisely, by using a high temperature process stream to heat the cold process stream in the plant, and effectively using heat in the process), this optimal Provide a triggered incentive. Pay capital cost. Recently, attention and capacity have been expanded to include capital minimization and waste flow reduction.

In a plant with multiple process heating and cooling flows, you need to perform a pinch analysis. A well designed heat exchanger network software program can be used to optimize the plant's overall heat transfer operation. Small factories can handle pinch analysis with a simple spreadsheet-based software program. This analysis can help modern plants achieve higher heat recovery, lower cooling tower loading and less heat input to process heaters. 4. Add more surface of heat exchanger. In some cases it may be useful to attach more plates to the plate heat exchanger and replace the existing common tube bundle with a high flux tube in a shell and tube heat exchanger. (For more information on shell and tube heat exchangers, see "Normal Condensate Control" and "Removing Heater Tube Faults")