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The effective convection coefficient on inside represents the proportionality constant between the heat flux and the thermodynamic driving force for the flow of heat, accounting for fouling factors on tube surfaces in heat exchangers.
The calculator uses the formula:
Where:
Explanation: This formula calculates the combined effect of convection coefficient and fouling resistance on the heat transfer process inside tubes.
Details: Accurate calculation of effective convection coefficient is crucial for designing efficient heat exchangers, predicting heat transfer rates, and accounting for fouling effects that reduce heat transfer efficiency over time.
Tips: Enter convection coefficient inside tubes in W/m²K and fouling factor on inside in m²K/W. Both values must be positive numbers greater than zero.
Q1: What is fouling factor and why is it important?
A: Fouling factor represents the theoretical resistance to heat flow due to build-up of dirt or other substances on tube surfaces, which significantly reduces heat transfer efficiency.
Q2: How does fouling affect heat exchanger performance?
A: Fouling increases thermal resistance, reduces heat transfer rates, increases pressure drop, and decreases overall efficiency of heat exchangers.
Q3: What are typical values for convection coefficients?
A: Convection coefficients vary widely depending on fluid properties, flow conditions, and geometry, typically ranging from 10-10,000 W/m²K for different applications.
Q4: How often should fouling factors be updated?
A: Fouling factors should be regularly monitored and updated based on operational experience, fluid properties, and maintenance schedules of the heat exchanger.
Q5: Can this formula be used for all types of heat exchangers?
A: This formula is generally applicable for calculating effective convection coefficients in various heat exchanger types, though specific applications may require additional considerations.