A heat exchanger fouling resistance online monitoring system comprises a fouling test pipe, a heating pipe, a heat exchange cavity, monitoring devices and flow controllers, wherein the fouling test pipe is communicated with a cold fluid pipe of a to-be-tested heat exchanger through a circulating...
Fouling of heat exchangers are influenced on the design and operation, the tubular exchange manufactures association (TEMA) are appropriate for shell-and-tube heat exchanger, only very limited information is available on the design of plate heat exchangers for fouling conditions. The authors made an...
Heat exchanger fouling detection in a simulated aircraft engine bleed air temperature control system Heat exchanger is a key component in aircraft engine bleed air temperature regulation systems. A potential fault associated with heat exchanger is fouling,... S Lan,G Liu - IEEE/ASME International Co...
Fouling of Heat Exchanger Surface: Measurement and Diagnosis. Heat. Transfer. Eng. 5, 93-101.Turakhia M, WG Characklis and N Zelver. 1984. Fouling of heat exchanger surface: measurement and diagnosis. Heat Transfer Engin- eering 5: 93-101....
F is the Fouling factor on the thermal liquid or moist air side, respectively. RW is the Thermal resistance through heat transfer surface. ATh is the heat transfer surface area of the respective side of the exchanger. ATh is the sum of the wall surface area, AW, and the Total fin surfac...
The layer of deposits represents additional resistance to heat transfer and causes the rate of heat transfer in a heat exchanger to decrease. The net effect of these accumulations on heat transfer is represented by a fouling factor Rf , which is a measure f the th th thermal l resistance i...
Plate heat exchanger PID: Proportional–integral–derivative ppm: Part per million PWT: Physical water treatment Rf : Fouling resistance, (m2.K/W) RTDs: Resistance temperature detectors s: Distance between the location of the thermocouple and the surface SCMC: Sodium carboxymethyl cellulose...
2 reduce the thermal resistance of the fouling layer The key to reducing the thermal resistance of the fouling layer of the heat exchanger is to prevent the structure of the plate. When the thickness of the sheet structure is 1 mm, the heat transfer coefficient is reduced by about 10%. Th...
R f′′-fouling factor (additional thermal resistance) R w-thermal resistance in the wall separating hot and cold fluid (corresponding to conduction) depends on material and geometry ηo-overall surface efficiency defined q=ηo?A(T b?T∞) ...
The equivalent thermal resistance of a heat exchanger is defined based on the concept of the entransy dissipation rate, which measures the irreversibility of heat transfer for the purpose of object heating or cooling, rather than from the heat to work conversion. The relationships between the heat...