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Solar Energy Systems
Useful Heat Gain in Solar Energy Systems Formulas
Useful heat gain is defined as the rate of heat transfer to the working fluid. And is denoted by q
u
. Useful Heat Gain is usually measured using the Watt for Power. Note that the value of Useful Heat Gain is always negative.
Formulas to find Useful Heat Gain in Solar Energy Systems
f
x
Useful heat gain in concentrating collector
Go
f
x
Useful heat gain rate in concentrating collector when concentration ratio is present
Go
f
x
Useful heat gain when collection efficiency is present
Go
f
x
Useful heat gain when collector efficiency factor is present
Go
f
x
Useful heat gain in compound parabolic collector
Go
Solar Energy Systems formulas that make use of Useful Heat Gain
f
x
Instantaneous collection efficiency of concentrating collector
Go
f
x
Instantaneous collection efficiency of concentrating collector on basis of beam radiation
Go
f
x
Area of Aperture given Useful Heat Gain
Go
f
x
Solar Beam Radiation given Useful Heat Gain Rate and Heat Loss Rate from Absorber
Go
List of variables in Solar Energy Systems formulas
f
x
Effective Area of Aperture
Go
f
x
Solar Beam Radiation
Go
f
x
Heat Loss from Collector
Go
f
x
Collector Heat Removal Factor
Go
f
x
Concentrator Aperture
Go
f
x
Outer Diameter of Absorber Tube
Go
f
x
Length of Concentrator
Go
f
x
Flux Absorbed by Plate
Go
f
x
Overall Loss Coefficient
Go
f
x
Concentration Ratio
Go
f
x
Inlet fluid Temperature Flat Plate Collector
Go
f
x
Ambient Air Temperature
Go
f
x
Instantaneous Collection Efficiency
Go
f
x
Hourly Beam Component
Go
f
x
Tilt Factor for Beam Radiation
Go
f
x
Hourly Diffuse Component
Go
f
x
Tilt factor for Diffused Radiation
Go
f
x
Mass Flowrate
Go
f
x
Molar Specific Heat Capacity at Constant Pressure
Go
f
x
Collector Efficiency Factor
Go
FAQ
What is the Useful Heat Gain?
Useful heat gain is defined as the rate of heat transfer to the working fluid. Useful Heat Gain is usually measured using the Watt for Power. Note that the value of Useful Heat Gain is always negative.
Can the Useful Heat Gain be negative?
Yes, the Useful Heat Gain, measured in Power can be negative.
What unit is used to measure Useful Heat Gain?
Useful Heat Gain is usually measured using the Watt[W] for Power. Kilowatt[W], Milliwatt[W], Microwatt[W] are the few other units in which Useful Heat Gain can be measured.
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