Views:2 Author:Site Editor Publish Time: 2020-07-31 Origin:Site
With the wide application of coolers in the industrial field, plate coolers are the dominant product in coolers, so what should the relevant technicians pay attention to when designing plate coolers? Here are some explanations today:
1. Design index. The design index of the cooler includes the type of working fluid and its flow rate, inlet and outlet temperature, working pressure and cooler efficiency. Coolers for aerospace vehicles should also include allowable pressure drop, size and mass.
2. General layout. The overall layout of the cooler should select the type and structure of the cooler, the fluid flow pattern and the materials used, and then the type of heat transfer surface. Consider operating temperature and pressure.
3. Thermal design. The thermal design of the cooler includes heat transfer calculation, flow resistance calculation and size determination. In addition to the technical performance indicators, the thermal design also needs the characteristics of the heat transfer surface (including heat transfer characteristics, flow resistance characteristics and structural parameters) and the thermophysical parameters of fluids and materials. Optimization techniques can be applied to the thermal design of the cooler. , According to the design goals, for the selected various cooler forms and heat transfer surfaces, optimization analysis is carried out through different angles, and several alternative solutions are provided.
4. Structural design. For some coolers that work under special conditions, some have to calculate the thermal stress during the start and stop period, calculate the structural vibration caused by the fluid flow, or check the flow rate in order to reduce corrosion and structure. In short, structural design and thermal design.
5. Choice of design plan. After the thermal design and structural design of the cooler are completed, a structural alternative is provided, and then the designer is based on the evaluation criteria. Make a decision after considering various specific conditions. The choice of conditions is qualitative, such as mold manufacturing conditions, brazing furnace size, transportation restrictions, delivery dates, company policies, and competition intensity will all affect the final choice. Evaluation criteria refer to indicators that can be quantified, such as weight, overall dimensions, pumping fluid consumption, initial investment, and life span.