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 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"
the most effective way to do so is to reduce the flow of the heat exchanger
Yes it does. As with any device, a heat exchanger is designed to work within certain parameters. If the conditions exceed these limits, the effectiveness of the heat exchanger is compromised, and my wind up not functioning at all.
The factors that are affected by number of tubes in shell and tube heat exchanger is the rate of heat transfer and flow rate.
Fouling factor is essentially used in determining the efficiency of the heat exchangers. Fouling factor is obtained from service (product) on either side of tubes and material of tubes. It basically represents corrosion of heat exchangers tubes which affects efficiency of heat transfer.
Robert Adrian Walker has written: 'Fouling in heat exchanger tubes'
Passivation solution for a heat exchanger is a chemical treatment that removes impurities and contaminants from the metal surfaces to promote the formation of a protective layer that prevents corrosion. This treatment helps to extend the lifespan and efficiency of the heat exchanger by reducing the risk of degradation and fouling.
The SI unit for fouling factor is m^2·K/W (square meters per kelvin per watt), which represents the thermal resistance caused by fouling on a surface. It is used to quantify the impact of fouling on heat transfer processes in engineering.
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.
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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"
expension belows are used for heat exchanger to avoid thermal stress
"http://wiki.answers.com/Q/How_do_you_calculate_the_water_flow_requirements_of_a_plate_heat_exchanger" "http://wiki.answers.com/Q/How_do_you_calculate_the_water_flow_requirements_of_a_plate_heat_exchanger"
It is necessary to schedule a heat exchanger replacement when the current heat exchanger is damaged, malfunctioning, or no longer efficient in transferring heat effectively. Regular maintenance and inspections can help determine when a replacement is needed.
The efficiency of a heat exchanger is directly proportional to its surface area. This means that a larger surface area allows for more heat transfer, resulting in a more efficient heat exchanger.
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.