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Incident flux when flow is between Cover and Absorber plate Formula

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Flux Absorbed by Plate is the amount of solar energy absorbed by the plate in a solar air heater, which is used to heat the air for various applications. Check FAQs

S flux = h fp \cdot (T pm - T fi) + (h r \cdot (T pm - T c)) + (U b \cdot (T pm - T a))

S_flux - Flux Absorbed by Plate?h_fp - Convective Heat Transfer Coeff of Solar?T_pm - Average Temperature of Absorber Plate?T_fi - Inlet Fluid Temperature Flat Plate Collector?h_r - Equivalent Radiative Heat Transfer Coefficient?T_c - Temperature of Cover?U_b - Bottom Loss Coefficient?T_a - Ambient Air Temperature?

Incident flux when flow is between Cover and Absorber plate Example

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Here is how the Incident flux when flow is between Cover and Absorber plate equation looks like with Values.

Here is how the Incident flux when flow is between Cover and Absorber plate equation looks like with Units.

Here is how the Incident flux when flow is between Cover and Absorber plate equation looks like.

261.1052 = 4.5 \cdot (107.69 - 3.06) + (1.1624 \cdot (107.69 - 172.3074)) + (0.7 \cdot (107.69 - 300))

261.1052J/sm² = 4.5W/m²*K \cdot (107.69K - 3.06K) + (1.1624W/m²*K \cdot (107.69K - 172.3074K)) + (0.7W/m²*K \cdot (107.69K - 300K))

261.1052 = 4.5 \cdot (107.69 - 3.06) + (1.1624 \cdot (107.69 - 172.3074)) + (0.7 \cdot (107.69 - 300))

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Incident flux when flow is between Cover and Absorber plate Solution

Follow our step by step solution on how to calculate Incident flux when flow is between Cover and Absorber plate?

FIRST Step Consider the formula

S flux = h fp \cdot (T pm - T fi) + (h r \cdot (T pm - T c)) + (U b \cdot (T pm - T a))

Next Step Substitute values of Variables

∴

S flux = 4.5W/m²*K \cdot (107.69K - 3.06K) + (1.1624W/m²*K \cdot (107.69K - 172.3074K)) + (0.7W/m²*K \cdot (107.69K - 300K))

Next Step Prepare to Evaluate

∴

S flux = 4.5 \cdot (107.69 - 3.06) + (1.1624 \cdot (107.69 - 172.3074)) + (0.7 \cdot (107.69 - 300))

Next Step Evaluate

∴

S flux = 261.10520154288W/m²

Next Step Convert to Output's Unit

∴

S flux = 261.10520154288J/sm²

LAST Step Rounding Answer

∴

S flux = 261.1052J/sm²

Incident flux when flow is between Cover and Absorber plate Formula Elements

Variables

Flux Absorbed by Plate

Flux Absorbed by Plate is the amount of solar energy absorbed by the plate in a solar air heater, which is used to heat the air for various applications.

Symbol: S_flux

Measurement: Heat Flux DensityUnit: J/sm²

Note: Value can be positive or negative.

Formulas to find Flux Absorbed by Plate

Convective Heat Transfer Coeff of Solar

Convective Heat Transfer Coeff of Solar is the rate of heat transfer between the solar air heater and the surrounding air.

Symbol: h_fp

Measurement: Heat Transfer CoefficientUnit: W/m²*K

Note: Value should be greater than 0.

Formulas to find Convective Heat Transfer Coeff of Solar

Average Temperature of Absorber Plate

Average Temperature of Absorber Plate is the average temperature of the absorber plate in a solar air heater, which affects the overall system efficiency.

Symbol: T_pm

Measurement: TemperatureUnit: K

Note: Value can be positive or negative.

Formulas to find Average Temperature of Absorber Plate

Inlet Fluid Temperature Flat Plate Collector

Inlet Fluid Temperature Flat Plate Collector is the temperature of the fluid entering the flat plate collector in a solar air heater system.

Symbol: T_fi

Measurement: TemperatureUnit: K

Note: Value can be positive or negative.

Formulas to find Inlet Fluid Temperature Flat Plate Collector

Equivalent Radiative Heat Transfer Coefficient

Equivalent Radiative Heat Transfer Coefficient is the rate of heat transfer between the solar air heater and its surroundings through radiation.

Symbol: h_r

Measurement: Heat Transfer CoefficientUnit: W/m²*K

Note: Value can be positive or negative.

Formulas to find Equivalent Radiative Heat Transfer Coefficient

Temperature of Cover

Temperature of Cover is the temperature of the cover or glazing material used in a solar air heater to trap heat and improve its efficiency.

Symbol: T_c

Measurement: TemperatureUnit: K

Note: Value can be positive or negative.

Formulas to find Temperature of Cover

Bottom Loss Coefficient

Bottom Loss Coefficient is the measure of heat loss from the bottom of a solar air heater to the surroundings, affecting its overall efficiency.

Symbol: U_b

Measurement: Heat Transfer CoefficientUnit: W/m²*K

Note: Value can be positive or negative.

Formulas to find Bottom Loss Coefficient

Ambient Air Temperature

Ambient Air Temperature is the temperature of the air surrounding the solar air heater, which affects the system's overall performance and efficiency.

Symbol: T_a

Measurement: TemperatureUnit: K

Note: Value should be greater than 0.

Formulas to find Ambient Air Temperature

Other formulas in Solar Air Heater category

Go Equivalent radiative heat transfer coefficient

h r = \frac{4 \cdot [Stefan-BoltZ] \cdot {(T pm + T bm)}^{3}}{(\frac{1}{ε p}) + (\frac{1}{ε b}) - 1 \cdot (8)}

Go Effective heat transfer coefficient

h e = h fp + \frac{h r \cdot h fb}{h r + h fb}

How to Evaluate Incident flux when flow is between Cover and Absorber plate?

Incident flux when flow is between Cover and Absorber plate evaluator uses Flux Absorbed by Plate = Convective Heat Transfer Coeff of Solar*(Average Temperature of Absorber Plate-Inlet Fluid Temperature Flat Plate Collector)+(Equivalent Radiative Heat Transfer Coefficient*(Average Temperature of Absorber Plate-Temperature of Cover))+(Bottom Loss Coefficient*(Average Temperature of Absorber Plate-Ambient Air Temperature)) to evaluate the Flux Absorbed by Plate, Incident flux when flow is between Cover and Absorber plate formula is defined as the rate of energy transfer per unit area from the absorber plate to the flowing fluid in a solar air heater, influenced by factors such as plate temperatures, heat transfer coefficients, and fluid flow rates. Flux Absorbed by Plate is denoted by S_flux symbol.

How to evaluate Incident flux when flow is between Cover and Absorber plate using this online evaluator? To use this online evaluator for Incident flux when flow is between Cover and Absorber plate, enter Convective Heat Transfer Coeff of Solar (h_fp), Average Temperature of Absorber Plate (T_pm), Inlet Fluid Temperature Flat Plate Collector (T_fi), Equivalent Radiative Heat Transfer Coefficient (h_r), Temperature of Cover (T_c), Bottom Loss Coefficient (U_b) & Ambient Air Temperature (T_a) and hit the calculate button.

FAQs on Incident flux when flow is between Cover and Absorber plate

What is the formula to find Incident flux when flow is between Cover and Absorber plate?

The formula of Incident flux when flow is between Cover and Absorber plate is expressed as Flux Absorbed by Plate = Convective Heat Transfer Coeff of Solar*(Average Temperature of Absorber Plate-Inlet Fluid Temperature Flat Plate Collector)+(Equivalent Radiative Heat Transfer Coefficient*(Average Temperature of Absorber Plate-Temperature of Cover))+(Bottom Loss Coefficient*(Average Temperature of Absorber Plate-Ambient Air Temperature)). Here is an example- 201.0166 = 4.5*(107.69-3.06)+(1.162423*(107.69-172.30744))+(0.7*(107.69-300)).

How to calculate Incident flux when flow is between Cover and Absorber plate?

With Convective Heat Transfer Coeff of Solar (h_fp), Average Temperature of Absorber Plate (T_pm), Inlet Fluid Temperature Flat Plate Collector (T_fi), Equivalent Radiative Heat Transfer Coefficient (h_r), Temperature of Cover (T_c), Bottom Loss Coefficient (U_b) & Ambient Air Temperature (T_a) we can find Incident flux when flow is between Cover and Absorber plate using the formula - Flux Absorbed by Plate = Convective Heat Transfer Coeff of Solar*(Average Temperature of Absorber Plate-Inlet Fluid Temperature Flat Plate Collector)+(Equivalent Radiative Heat Transfer Coefficient*(Average Temperature of Absorber Plate-Temperature of Cover))+(Bottom Loss Coefficient*(Average Temperature of Absorber Plate-Ambient Air Temperature)).

Can the Incident flux when flow is between Cover and Absorber plate be negative?

Yes, the Incident flux when flow is between Cover and Absorber plate, measured in Heat Flux Density can be negative.

Which unit is used to measure Incident flux when flow is between Cover and Absorber plate?

Incident flux when flow is between Cover and Absorber plate is usually measured using the Joule per Second per Square Meter[J/sm²] for Heat Flux Density. Watt per Square Meter[J/sm²], Kilowatt per Square Meter[J/sm²], Watt per Square Centimeter[J/sm²] are the few other units in which Incident flux when flow is between Cover and Absorber plate can be measured.

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Incident flux when flow is between Cover and Absorber plate Formula

Incident flux when flow is between Cover and Absorber plate Example

Incident flux when flow is between Cover and Absorber plate Solution

Incident flux when flow is between Cover and Absorber plate Formula Elements

Other formulas in Solar Air Heater category

How to Evaluate Incident flux when flow is between Cover and Absorber plate?

FAQs on Incident flux when flow is between Cover and Absorber plate

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