Questions and answers

What are the classification of heat exchangers?

What are the classification of heat exchangers?

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.

What are the 5 different types of heat exchangers?

Types of Heat Exchangers

  • Shell and tube heat exchangers.
  • Double pipe heat exchangers.
  • Plate heat exchangers.
  • Condensers, evaporators, and boilers.

What are heat exchangers PPT?

A heat exchanger is a device that is used to transfer thermal energy (enthalpy) between two or more fluids, between a solid surface and a fluid, or between solid particulates and a fluid, at different temperatures and in thermal contact.

What is heat exchanger example?

The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air.

How do you classify heat?

Heat is transfered via solid material (conduction), liquids and gases (convection), and electromagnetical waves (radiation). Heat is usually transfered in a combination of these three types and seldomly occurs on its own.

What is the function of heat exchangers?

Heat exchangers are integral parts of fuel cell systems for thermal management functions related to heating of incoming gas streams, exchange of heat from various flow streams and maintenance of the uniformity of temperature.

What are the four types of heat transfer?

Various heat transfer mechanisms exist, including convection, conduction, thermal radiation, and evaporative cooling.

What are heat exchangers used in?

Heat exchangers are used to transfer heat from one medium to another. These media may be a gas, liquid, or a combination of both. The media may be separated by a solid wall to prevent mixing or may be in direct contact.

What is heat exchanger and types of heat exchanger?

A heat exchanger is a system used to transfer heat between two or more fluids. Another example is the heat sink, which is a passive heat exchanger that transfers the heat generated by an electronic or a mechanical device to a fluid medium, often air or a liquid coolant.

What is the working principle of heat exchanger?

Working Principle A heat exchanger works on the simple principle of second law of thermodynamics; the heat flow from a body to another in respect of their temperature difference. The heat under natural state will move from a hot body to a cooler one.

What are the different types of heat exchangers?

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.  They are typically used for high pressure applications. (above 30 bars) 11.  Cooling of hydraulic fluid.  Cooling of engine oils.  Cool or heat swimming pool water or charged air.

How are heat exchangers used in a plant?

Heat Exchangers Heat exchangers are one of the most common pieces of equipment found in all plants. 3. Heat Exchangers are components that allow the transfer of heat from one fluid (liquid or gas) to another fluid. 4. In a heat exchanger there is no direct contact between the two fluids.

How are the plates arranged in a heat exchanger?

The plates are pressed to form troughs at right angles to the direction of flow of the liquid which runs through the channels in the heat exchanger. These troughs are arranged so that they interlink with the other plates which forms the channel with gaps of 1.3– 1.5 mm between the plates.

What are the channels in a spiral heat exchanger?

• A Spiral Heat Exchangers (or SHE) is a coiled tube arrangement, with two channels coiled one around the another. These two channels operate in a counter-flow arrangement, offering excellent turn down ratios, while optimizing flow patterns which in turn, enhance heat transfer.