Refrigeration & Heat Exchange Equipment products for sale online in Zambia

Transfer heat from a flowing substance to another
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Refrigeration & Heat Exchange Equipment

Transfer heat from a flowing substance to another

In principle heat, exchangers have the purpose to transfer heat from a flowing substance to another flowing substance of a lower original temperature. In refrigeration engineering, heat exchangers are equally used as evaporators and as condensers. In both applications, the refrigerant undergoes a phase transition. Refrigeration system consists of several types of equipment like compressor, condenser, evaporator, expansion devices etc. ... Its function is to remove the heat of the hot vapour refrigerant discharged from the compressor. The evaporator is used in the low-pressure side of a refrigeration system.

Tt's an equipment that helps distribute heat between two fluids. This way, while one gains heat, the other one loses it and any of them may be used in your production processes. For example, removing heat from a coolant using cold water

Types of Heat Exchangers

  • Shell and tube heat exchangers. - The shell-and-tube exchanger contains a large shell and many tubes. A fluid stream passes through the tubes, and another stream passes through the shell to trade heat energy. The improved heat transfer signifies a faster transfer rate and the higher heat capacity of the system
  • Double pipe heat exchangers. - Double-pipe heat exchangers are devices that provide the transfer of thermal energy between two fluids at different temperatures. The major use of these heat exchangers is the sensible heating or cooling process of fluids where small heat transfer areas are required. The oil cooler is an example of these processes.
  • Plate heat exchangers. - Plate heat exchangers are used to transfer heat between two media, which are separated from each other by corrugated plates. The plate heat exchanger consists of different heat transfer plates, which are sealed by gaskets, or brazed, or welded together.
  • Plate exchanger is the most efficient due to turbulent flow on both sides. High heat-transfer coefficient and high turbulence due to even flow distribution are important.
  • Condensers, evaporators, and boilers. - This reference covers the thermal design, operation and maintenance of the three major components in industrial heating and air conditioning systems including fossil fuel-fired boilers, waste heat boilers and air conditioning evaporators. Among the distinguishing features covered are: the numerous types of components in use and the features and relative merits of each, overviews of the major technical sections of the book, with suggested approaches to design based on industrial experience, case studies and examples of actual engineering problems, design methods and procedures based on current industrial practice in the United States, Russia, China and Europe with data charts, tables and thermal-hydraulic correlations for design included, and various approaches to design based on experience in the art of industrial process equipment design.

A heat exchanger is a device that facilitates the process of heat exchange between two fluids that are at different temperatures.

The most common in household refrigerators is the tube-in-tube heat exchanger with a capillary tube placed concentrically inside the suction tube.

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.

The major difference between a heat exchanger and a chiller is in the design. While chiller systems possess refrigeration units that cool their circulating chiller fluid, a heat exchanger lacks a refrigeration unit and achieves temperature regulation by direct fluid heat transfer.

Different Types Of Heat Exchanger

  • Finned Tube Heat Exchanger Or Air Cooled Heat Exchanger. Suitable for: air/gas to fluid.
  • Shell And Tube Heat Exchanger. Suitable for: fluid to fluid / fluid to gas.
  • Plate Heat Exchanger Or Gasket Plate Heat Exchanger. Suitable for: fluid to fluid / fluid to vapour.

While metals have a high resistance and are commonly used in constructing heat exchangers due to their high thermal conductivity, as in the case of copper, titanium, and stainless-steel heat exchangers, other materials, such as graphite, ceramics, composites, or plastics, may offer greater advantages depending on the

Heat exchangers work by transferring heat from one place to another. The combustion produced from the burning natural gas or propane fuel in the furnace enters and travels through the heat exchanger. As the gas makes its way to the exhaust outlet of the furnace, the hot flue gas heats the metal. The hot metal heats the air circulating over the exterior of the heat exchanger. Note that it is only one way of heat exchanging that happens in different types of heat exchangers but it is the whole point in almost all types of heat transfer machines.