Knowledge Of Plate heat exchange

Vertical shell and tube condenser The main features of the vertical condenser are: 1)     Due to the high cooling flow and flow rate, the heat transfer coefficient is high, generally about K = 600 ~ 700 (kcal / m2? H? ℃ ). 2)     Vertical installation covers small areas, and can be installed outdoors. 3)     Cooling water flow directly and have high flow rate, so not need high water quality, the general water can be used as cooling water. 4)     Scales in pipe can be easy removed, and do not have to stop the refrigeration system work. 5)     But in the vertical condenser, the rise temperature of cooling water is generally only 2 ~ 4 ℃ , logarithmic average temperature difference is generally about 5 ~ 6 ℃ , so need much water. And because the equipment is placed in the air, the tube is susceptible to corrosion and is easier to find its leaking. Shower type condenser ...

Hofmann During the process, there are some safety considerations you should notice: 1. Design specifications. The design specifications of heat exchangers include the types of working fluid and flow, import and export temperature, working pressure and heat exchanger efficiency. Aerospace heat exchangers should also include permissible pressure drop, size and quality. 2. Overall arrangement. First you should choose the type and structure of heat exchangers, the form of fluid flow and the materials, and then choose the type of heat surface, to consider the operating temperature and pressure, etc. 3. Heat design. The thermal design of the heat exchanger includes heat transfer calculation, flow calculation and determination of size. In addition to technical performance indicators, thermal design also need heat transfer characteristics (including heat transfer characteristics, flow characteristics and structural parameters) and fluid and material thermal activity p...