Advantages
Efficient use of Temperature Difference
The fully countercurrent system(TYPE-1) is able to exchange heat even if temperature difference is extremely close. Most effective saving energy is possible.
Low Fouling (Self Cleaning)
The rotary current of spiral heat exchanger possesses the property of scraping off and spilling the dirty sedimentation(stagnation solid). Even though scales adhere to it, the cross-section of the adherent part becomes smaller, the flow-speed would be quickly and bring the function of self cleaning by single-pass flow.
High Overall Heat Transfer Coefficient
Spiral flow passage easily creates turbulent flow.Optimum flow speed can be gained by selecting the most suitable spiral channel. High Overall Heat Transfer Coefficient can be achieved.
Easy Maintenance
The heat transfer part is easily accessed and checked. It is possible to easily do by removing the cover of the both ends, for the inspection of the inside.The maintenance cost of Spiral Heat Exchanger is much lower than others.
Space Saving
SHE equipment volume is far compact comparing to Tubular Heat Exchanger. Plant space can be saved and plant initial cost can be saved.
1. simple construction and easy of operation
2. counter current flow will result in lower surface area requirement
It's the flat, flanged cover on the front (and sometimes the rear) of a shell & tube heat exchanger.
Dissipates the heat produced by the heat exchanger through convection and creates static and velocity pressure to distribute the hot air throughout the duct system.
The assumption to design heat exchanger is that it must be a shell and tube device. This device must allow the transfer of heat from one fluid to another without mixing the two fluids.
air handler
There are actually many types of plate heat exchangers, and the YOJO brand has introduced brazed plate heat exchangers and gasket plate heat exchangers. Today is the home of brazed heat exchangers.Brazed plate heat exchangers have no headers, tie rods or sealing gaskets, and the plates are brazed at a temperature of 1100 ° C. During the assembly stage, a piece of brazing material (usually copper, and nickel) is placed between the two plates, the package is compressed, and then baked for several hour.BPHE is more compact and lighter, and the brazing material has the functions of both washer and frame. The intersection between the corrugations of the two coupling plates forms a dense network of contact points, which impart pressure tightness and generate vortex flow, thereby improving heat exchange. In this way, even at low nominal input speeds, the turbulence of the fluid is high, and for low flow rates, the fluid flows from laminar to turbulent.
Advantages: Simplicity of design; Easy to clean and maintain; ideal for fluids that cause fouling. Disadvantages: Length cannot be extended beyond a limit Rate of heat transfer is low + high cost when considering amt of heat transfer. Heat looses occur from the outer shell.
Advantages of shell and tube heat exchanger are: * Its compact design * Capability of withstanding high pressure Disadvantages: * It is difficult to readily inspect the shell side of the tubes for scaling or tube damage
there are two type of heat exchanger in absorption refrigeration, first is liquid heat exchanger and other is gas heat exchanger.both heat exchanger function is same, to transfer heat (hot medium to cold medium) without violate second newton law of thermodynamics. liquids heat exchanger is between boiler and absorber vessel mean while gas heat exchanger between evaporator and absorber.
the advantages are-keep heat for longerreusablelightweightpopularthe disadvantages are- expensivesometimes made from bad materialscan be harmful to environment
Metal gets oxidized.
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The duty of a heat exchanger can be defined in an easy way as "The amount of heat exchanged from a fluid at a higher temperature to the fluid at lower temperature in unit time by a heat exchanger is called its duty"
actually there is no difference , infact condenser itself is a heat exchanger
A heat exchanger.
Calorifer is a heat exchanger, with a specific of air (or other gas) preheat. Usually is directly in a Duct installed. Heat Exchanger usually is separate unit.
expension belows are used for heat exchanger to avoid thermal stress
A heat exchanger is a device that transfers heat from one fluid to the others. A condenser is simply a heat exchanger. It compresses refrigerants into a hot gas to then condense them into a liquid. Majorly condenser is used to cool the required vapor and heat exchanger is used to heat the required liquid.