Heat exchanger engineering design and simulation calculations
Thread Content
1. An introduction to the modifications and additions made to \"Heat Exchangers\" (GB/T151-2014) compared with GB151-1999. 2. The input and output of the basic parameters for the functions and modules of two common simulation software programs used for heat exchangers； How to use this series of software to simulate the physical properties of a new substance ； Viewing and adjusting the simulated final results, as well as outputting/exporting the results ； How to import property data generated by other software (such as ASPEN PLUS) into HTRI and EDR ； Methods for calculating internal properties of software. 3. Shell-and-tube structure, selection and matching of tube-side parameters; head selection (TEMA and GB151), shell selection (TEMA and GB151), heat exchange tube selection (reference standards, material selection, specifications and models); tube arrangement and stratification; baffle setup (baffle type, spacing, placement, and cuts); gap setting; nozzle definition; flow guide structure configuration (GB151 O-type shell); anti-scouring structure configuration; other settings. 1. Examples of single-phase shell-and-tube heat exchangers* Questions and answers2. Design and optimization of phase-change-free heat exchangers: air-water heat exchangers, air-air heat exchangers, oil-water heat exchangers, water-water heat exchangers
3. Design and optimization of condensers; common condenser structures ； Classification of condensation flow patterns ； Low-pressure waste steam condenser (1 case) ； Medium and high pressure process steam condenser (1 example) ； Top reflux condenser (1 case). 4. Design and optimization of reboilers: Conventional reboiler design (2 examples) ； Thermal siphon reboiler (1 example) ； Falling film reboiler (1 case). 5. Using engineering examples, explain how structural optimization can be used to prevent vibration in heat exchanger tubes. 6. Software operation practice and Q&A. 1. Introduction to the structures of air coolers, economizers, etc.; inputting parameters such as the structure of the air cooler, tube span settings, fan settings, tube bundle settings, settings for heat exchange tubes and fins, and settings for other structural components. 2. Present the output report using examples (summary table of results, overall output table, detailed analysis of the inner and outer sides of the pipe), along with optimization directions and classification of common issues. 3. Practical example and optimization Example 1: Conventional air cooler (design-check) ； Example 2: Economizer (verification) ； Example 3: Natural air cooling (simulation). Example 4: Air cooling in the refrigeration industry (verification mode design). 4. Heat exchanger calculation – Heat flow calculation ； Wall temperature calculation ； Flow resistance of fluids in heat exchangers ； Verification of the main structural dimensions of the heat exchanger. 1. Engineering design and simulation calculations for plate heat exchangers: explanation of the common plate types used in current plate heat exchangers, process configuration (use of upper and lower plates), arrangement of corner holes, and parameter optimization. 2. Provide an introduction to the output by giving examples; present the output report (summary table of results, overall output table, and detailed analysis for the hot and cold sides), optimization directions, and classification of common issues. 3. Explanation and optimization of plate heat exchanger examples
1. The main difference between GB/T151-2014 and GB151-1999 lies in the updated standards for the design, manufacturing, and acceptance of heat exchangers; new materials and manufacturing processes have been added, and the calculation methods and testing procedures have been improved. 2. Commonly used heat exchanger simulation software includes HTRI and EDR; these two programs allow users to input various parameters such as fluid properties, temperature, pressure, flow rate, and heat exchanger dimensions, and they can provide output regarding the thermal and hydrodynamic performance of the heat exchanger. When simulating the physical properties of new substances, you can manually enter the property data or import it from an existing property database. The software provides functions for viewing and adjusting results, and allows results to be exported in various formats. Physical property data generated by other software, such as Aspen Plus, can be imported into HTRI and EDR in formats like text files. 3. The design of shell-and-tube heat exchangers involves the selection and dimensioning of the tube side, head, shell, and heat exchange tubes, as well as the arrangement of the tubes, the type and spacing of baffle plates, and the flow guiding structures. It is necessary to take into account the requirements of the TEMA standard and GB151 standard to ensure safety, economy, and reliability. 4. For different types of heat exchangers, such as single-phase shell-and-tube heat exchangers, phase-change-free heat exchangers, and condensers as well as reboilers, it is necessary to select appropriate structures and models based on the specific operating conditions. Thermal calculations and structural design must be carried out, taking into account both efficiency and cost. 5. The design of special heat exchangers such as air coolers and economizers involves setting various structural parameters, including the selection and arrangement of tube spans, fans, tube bundles, fins, etc. After the design is finalized, optimization efforts typically focus on improving thermal efficiency, controlling costs, and ensuring operational stability. 6. By using software through engineering examples for the design verification, simulation, and optimization of heat exchangers, it is possible to predict their performance, carry out structural design, and conduct operational analysis. 7. The design and simulation of plate heat exchangers involve aspects such as plate selection, flow configuration, and the arrangement of corner holes. It is necessary to choose appropriate plates and flow patterns based on the specific heat exchange requirements, and to optimize through simulation in order to achieve good heat transfer performance. .
Use of high and low boards? What does this mean?