- What is a heat exchanger?
A heat exchanger is a device used for efficient heat transfer from one medium to another. The media may be separated by solid walls so that they never mix, or they may be in direct contact. It is widely used in space heating, refrigeration, air conditioning, power plants, chemical plants, petrochemical plants, refineries, natural gas processing, etc. A common example of a heat exchanger is the radiator in a car, where the heat source (i.e., hot engine coolant) transfers heat to the air (i.e., heat transfer medium) flowing through the radiator. Heat exchangers come in so many shapes, sizes, brands, and models that they are classified by common characteristics. A common feature that can be used to classify them is the flow direction of the two fluids relative to each other.
- What is the SA 179 tube in a heat exchanger?
ASTM A179 (ASME SA179) tubes is manufactured in cold-drawn seamless, material in low carbon steel, sizes up to 3'', for heat exchanger and condenser.
In a heat exchanger, the SA 179 tube, which is a type of seamless pipe, has two main functions in terms of heat transfer and fluid channeling. Regarding heat transfer, it serves as a carrier for heat conduction. Through its tube wall, the heat from the high-temperature fluid is transferred to the low-temperature fluid. Moreover, it can increase the heat transfer area, thereby enhancing the heat exchange efficiency. In terms of fluid channeling, it can separate different fluids to prevent mixing. It can also guide the fluid to flow along a predetermined path. For example, a spiral seamless pipe like the SA 179 tube can increase the turbulence degree of the fluid, thus improving the heat transfer coefficient.
In heat exchangers, sa 179 tubing has both heat transfer and fluid channel functions. In terms of heat transfer, it is not only a carrier of heat conduction, transferring heat from high-temperature fluid to low-temperature fluid through the tube wall, but also increasing the heat transfer area and improving the heat exchange efficiency; in terms of fluid channels, it can separate different fluids and prevent mixing, and can also guide the fluid to flow along a predetermined path, such as a spiral tube can increase the turbulence of the fluid to improve the heat transfer coefficient.
3.How many tubes are in a heat exchanger?
In Power plant 500-1000 MW or more turbine hot well surface condenser are available more than 10,000 Number of tubes.waste heat boiler in power plant gas turbine are shell tube type heat exchanger are also larger size and having 5000-12000 number of tubes.
