Problems in high temperature heat pipe heat exchanger

High temperature heat pipe heat exchanger also faces two urgent problems in heat transfer:

1. The planning of high temperature heat pipe heat exchanger is huge and expensive, which greatly hinders the industrial application process of high temperature heat pipe heat exchanger.

2. The connection of transition section is unreasonable, resulting in some heat pipes in non working and abnormal working conditions.

The key to dealing with the above problems is:

1. There are two methods to optimize the design of high temperature heat pipe heat exchanger: one is to study the enhanced heat transfer of a single heat pipe; The second is to reasonably guess the distribution of flow field and temperature field on the shell side. The combination of the two is the future development direction of heat pipe heat exchanger enhanced heat transfer technology.

2. The enhanced heat transfer in the transition section plays a very important role in optimizing the planning of high-temperature heat pipe heat exchangers and safely connecting the heat pipe heat exchangers in various areas.

Research status of heat exchanger in China

It can be named condenser, evaporator, reheater and Superheater according to its function. According to the characteristics of heat exchange components, they can be divided into shell and tube heat exchanger Finned tube heat exchanger and plate heat exchanger (including plate heat exchanger and plate fin heat exchanger). The research on enhanced heat exchange technology of various heat exchangers mainly focuses on the change of fluid flow pattern in the heat exchanger and the optimization of component parameters. The main research strategies of component parameters of heat exchanger are the arrangement of heat exchange tubes (plates) (in-line or horizontal) and heat exchange tubes The number of rows, the spacing of heat exchange tubes (plates), the spacing of fins and ribs, and the commonly used research methods include numerical simulation calculation, experimental method research and theoretical research.