Marine Heat Exchanger

Marine Heat Exchanger

1. Marine Heat Exchanger Introduction

The heat exchanger is a device that can exchange heat under a certain structure and a certain working condition, and enables the cold and hot fluids to exchange heat. It is a heat transfer device that transfers heat from one fluid to another fluid.

Classification: According to its usage, it can be divided into heaters (using steam to heat fuel oil, drinking water, etc.) and coolers (using sea water to cool fresh water, lubricating oil, air and steam, etc.); according to its structural form, the commonly used coil type, sleeve type, shell and tube type, plate type, etc. The same type of exchanger can often be used as both a heater and a cooler.

Marine Heat Exchanger
Shell and Tube Exchanger	Plate Heat Exchanger

2. Advantages of Marine Heat Exchanger

Shell and tube heat exchangers are the most widely used type of heat exchanger. At present, most of the oil coolers, fresh water coolers, fuel heaters, condensers, etc. used on ships are shell and tube types.

The plate heat exchanger uses corrugated plates as heat transfer elements, stacks several plates in the frame, and makes the cold and heat medium flow in the gaps on both sides of the plates for heat exchange.

The former is widely used, and the latter is a new type of heat exchange equipment commonly used in intercoolers and lubricating oil coolers of gas turbines and superchargers.

3. Composition of Marine Heat Exchanger

①Shell and Tube Heat Exchangers

Shell and tube heat exchangers consist of series of tubes. One set of these tubes contains the fluid that must be either heated or cooled. The second fluid runs over the tubes that are being heated or cooled so that it can either provide the heat or absorb the heat required. A set of tubes is called the tube bundle and can be made up of several types of tubes: plain, longitudinally finned, etc. Shell and tube heat exchangers are typically used for high-pressure applications (with pressures greater than 30 bar and temperatures greater than 260 °C). This is because the shell and tube heat exchangers are robust due to their shape.
Several thermal design features must be considered when designing the tubes in the shell and tube heat exchangers: There can be many variations on the shell and tube design. Typically, the ends of each tube are connected to plenums (sometimes called water boxes) through holes in tube sheets.

②Detachable Plate Heat Eexchanger

The detachable plate heat exchanger is made of many stamped corrugated thin plates at a certain interval, sealed with gaskets around them, and laminated and compressed by a frame and a compression screw. The four corner holes of the plates and gaskets form a fluid divider. The piping and the collection pipe, while reasonably separating the cold and hot fluids, make them flow in the flow channels on both sides of each plate, and exchange heat through the plates.

4. Marine Heat Exchanger Workshop