What is the importance of thermodynamics in marine engineering?

What is the importance of thermodynamics in marine engineering?

Knowing the upwelling of ocean water The upwelling of ocean water cycle also become the importance of thermodynamics in marine engineering. Upwelling of the ocean water will create a movement where the cold water in the deeper part of the ocean goes to the surface to balance the temperature.

What is heat exchanger in marine engineering?

Heat exchanger is an equipment, where heat is transferred from one fluid to another. A heat exchanger can be used for exchanging heat between liquid and gas, gas and gas, liquid and liquid etc.

What is heat exchanger Marine insight?

2) Plate Type Heat Exchanger. Plate type exchanger consists of thin corrugated plates joined parallel together, creating a cavity for fluid flow inside it. Alternate sides of the plate carry two different fluids, between which, heat transfer is carried out.

What do marine engineers create?

Marine engineers and naval architects design, build, and maintain ships, from aircraft carriers to submarines and from sailboats to tankers.

What problems do marine engineers solve?

Ocean engineers solve problems and design for their environment either on the harsh ocean surface or at crushing depths. An ocean engineer might focus on ocean acoustics, wave hydrodynamics, off-shore structures, marine robotics and vortical flow amongst many other concerns.

Who do marine engineers work with?

Marine engineers design the mechanical systems, such as propulsion and power, of watercraft, ranging from submarines to tankers. They work closely with naval architects who create the basic design of vessels. Note that marine engineers differ from ship’s engineers, who supervise the operation of shipboard machinery.

What is the most effective heat exchanger?

Plate exchanger

What are the two types of heat exchangers?

There are two main types of regenerative heat exchangers—static heat exchangers and dynamic heat exchangers.

What type of flow has better heat transfer in a coil?

Each of the three types of heat exchangers (Parallel, Cross and Counter Flow) has advantages and disadvantages. But of the three, the counter flow heat exchanger design is the most efficient when comparing heat transfer rate per unit surface area.

How are heat exchangers classified?

Heat exchangers are classified according to transfer processes into indirect- and direct- contact types. FIGURE 1.2 (a) Classification according to process function; (b) classification of condensers; (c) classification of liquid-to-vapor phase-change exchangers. exchanger as a regenerator.

How do I choose a heat exchanger?

The following criteria can help in selecting the type of heat exchanger best suited for a given process:

1. Application (i.e. sensible vapor or liquid, condensing or boiling)
2. Operating pressures & temperatures (including startup, shutdown, normal & process upset conditions)

What is log mean temperature difference in a heat exchanger?

The log mean temperature difference (LMTD) is used to determine the temperature driving force for heat transfer in flow systems, most notably in heat exchangers. The LMTD is a logarithmic average of the temperature difference between the hot and cold streams at each end of the exchanger.

What is overall heat transfer coefficient?

The overall heat transfer coefficient, or U-value, refers to how well heat is conducted through over a series of resistant mediums. Its units are the W/(m2°C) [Btu/(hr-ft2°F)].

Why shell and tube heat exchanger is popular?

Shell and tube heat exchangers are one of the most popular types of heat exchanger because of their flexibility to accommodate a wide range of temperatures and pressures. Shell, or pressure vessel – is where a cooling or heating fluid will flow through to transfer heat or remove heat from a tube bundle.

What can go wrong with a heat exchanger?

Although the heat exchangers in most modern furnaces have abundant safety features, they can crack over time. A hole or a crack in the exchanger may cause the burner flame to roll out the front of the furnace whenever the fan comes on, as there is no barrier between the circulating air and the burner flame.

What is a Tubesheet?

A tube sheet is a plate which is used to support the tubes in a shell-and-tube heat exchanger. The tubes are aligned in a parallel way, and supported and held in place by tube sheets. The tube sheet is a circular plate which is perforated so that the tubes can fit through the openings.

How do you calculate the number of heat exchangers on a tube?

4.0 – HEAT EXCHANGERS CALCULATIONS:

1. The main basic Heat Exchanger equation is: Q = U x A x ΔTm =
2. The log mean temperature difference ΔTm is: ΔTm =
3. (T1 – t2) – (T2 – t1) = °F.
4. T1 = Inlet tube side fluid temperature; t2 = Outlet shell side fluid temperature;
5. ln (T1 – t2) (T2 – t1)

How many times do we have to calculate for pressure drop in a shell and tube heat exchanger?

4. How many times do we have to calculate for Pressure drop in a Shell and Tube Heat Exchanger? Explanation: For a Shell and Tube HE, we have to calculate pressure drop twice, once for the tube to check whether the equipment can handle that pressure.

What are the benefits of providing baffles in shell and tube heat exchanger?

The main roles of a baffle in a shell and tube heat exchanger are to:

• Hold tubes in position (preventing sagging), both in production and operation.
• Prevent the effects of steam starvation, which is increased with both fluid velocity and the length of the exchanger.
• Direct shell-side fluid flow along tube field.