Heat loss from collector Calculator

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✖Overall loss coefficient is defined as the heat loss from collector per unit area of absorber plate and temperature difference between absorber plate and surrounding air.ⓘ Overall loss coefficient [U_l]			+10% -10%
✖Area of absorber plate is defined as the area exposed to the sun that absorbs incident radiation .ⓘ Area of absorber plate [A_p]			+10% -10%
✖Average temperature of absorber plate is defined as the temperature spread across the surface area of the absorber plate.ⓘ Average temperature of absorber plate [T_pm]			+10% -10%
✖Ambient Air Temperature is the temperature where the ramming process starts.ⓘ Ambient Air Temperature [T_a]			+10% -10%

✖Heat loss from collector is defined as the heat losses that occur due to convection, conduction and radiation.ⓘ Heat loss from collector [q_l]

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Formula

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Heat loss from collector

Formula

`"q"_{"l"} = "U"_{"l"}*"A"_{"p"}*("T"_{"pm"}-"T"_{"a"})`

Example

`"162.5W"="1.25W/m²*K"*"13m²"*("310K"-"300K")`

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Heat loss from collector Solution

STEP 0: Pre-Calculation Summary

Formula Used

Heat Loss from Collector = Overall loss coefficient*Area of absorber plate*(Average temperature of absorber plate-Ambient Air Temperature)
q_l = U_l*A_p*(T_pm-T_a)
This formula uses 5 Variables

Variables Used

Heat Loss from Collector - (Measured in Watt) - Heat loss from collector is defined as the heat losses that occur due to convection, conduction and radiation.
Overall loss coefficient - (Measured in Watt per Square Meter per Kelvin) - Overall loss coefficient is defined as the heat loss from collector per unit area of absorber plate and temperature difference between absorber plate and surrounding air.
Area of absorber plate - (Measured in Square Meter) - Area of absorber plate is defined as the area exposed to the sun that absorbs incident radiation .
Average temperature of absorber plate - (Measured in Kelvin) - Average temperature of absorber plate is defined as the temperature spread across the surface area of the absorber plate.
Ambient Air Temperature - (Measured in Kelvin) - Ambient Air Temperature is the temperature where the ramming process starts.

STEP 1: Convert Input(s) to Base Unit

Overall loss coefficient: 1.25 Watt per Square Meter per Kelvin --> 1.25 Watt per Square Meter per Kelvin No Conversion Required
Area of absorber plate: 13 Square Meter --> 13 Square Meter No Conversion Required
Average temperature of absorber plate: 310 Kelvin --> 310 Kelvin No Conversion Required
Ambient Air Temperature: 300 Kelvin --> 300 Kelvin No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

q_l = U_l*A_p*(T_pm-T_a) --> 1.25*13*(310-300)

Evaluating ... ...

q_l = 162.5

STEP 3: Convert Result to Output's Unit

162.5 Watt --> No Conversion Required

FINAL ANSWER

162.5 Watt <-- Heat Loss from Collector

(Calculation completed in 00.004 seconds)

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Created by ADITYA RAWAT

DIT UNIVERSITY (DITU), Dehradun

ADITYA RAWAT has created this Calculator and 50+ more calculators!

Verified by Anshika Arya

National Institute Of Technology (NIT), Hamirpur

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< 10+ Liquid Flat Plate Collectors Calculators

Collection efficiency when collector efficiency factor is present

Go Instantaneous Collection Efficiency = (Collector Efficiency Factor*(Area of absorber plate/Gross Collector Area)*Average Transmissivity-absorptivity Product)-(Collector Efficiency Factor*Area of absorber plate*Overall loss coefficient*(Average of Inlet and Outlet Temperature of fluid-Ambient Air Temperature)*1/Flux Incident on Top Cover)

Collection efficiency when heat removal factor is present

Go Instantaneous Collection Efficiency = Collector heat removal factor*(Area of absorber plate/Gross Collector Area)*(Flux absorbed by plate/Flux Incident on Top Cover-((Overall loss coefficient*(Inlet fluid temperature flat plate collector-Ambient Air Temperature))/Flux Incident on Top Cover))

Collector heat removal factor

Go Collector heat removal factor = (Mass Flow Rate*Specific Heat Capacity at Constant Pressure)/(Overall loss coefficient*Gross Collector Area)*(1-e^(-(Collector Efficiency Factor*Overall loss coefficient*Gross Collector Area)/(Mass Flow Rate*Specific Heat Capacity at Constant Pressure)))

Collection efficiency when average transmissivity-absorptivity product is present

Go Instantaneous Collection Efficiency = Collector heat removal factor*(Area of absorber plate/Gross Collector Area)*(Average Transmissivity-absorptivity Product-(Overall loss coefficient*(Inlet fluid temperature flat plate collector-Ambient Air Temperature))/Flux Incident on Top Cover)

Heat loss from collector

Go Heat Loss from Collector = Overall loss coefficient*Area of absorber plate*(Average temperature of absorber plate-Ambient Air Temperature)

Collection efficiency when fluid temperature is present

Go Instantaneous Collection Efficiency = (0.692-4.024*(Inlet fluid temperature flat plate collector-Ambient Air Temperature))/Flux Incident on Top Cover

Transmissivity Absorptivity product

Go Transmissivity - Absorptivity product = Transmissivity*Absorptivity/(1-(1-Absorptivity)*Diffuse Reflectivity)

Instantaneous collection efficiency

Go Instantaneous Collection Efficiency = Useful heat gain/(Gross Collector Area*Flux Incident on Top Cover)

Useful heat gain

Go Useful heat gain = Area of absorber plate*Flux absorbed by plate-Heat Loss from Collector

Bottom loss coefficient

Go Bottom Loss Coefficient = Thermal Conductivity of Insulation/Thickness of Insulation

Heat loss from collector Formula

Heat Loss from Collector = Overall loss coefficient*Area of absorber plate*(Average temperature of absorber plate-Ambient Air Temperature)
q_l = U_l*A_p*(T_pm-T_a)

What is another way to find this?

Heat loss from collector is actually the sum of rates of heat loss from the top, the bottom, and the sides.

How to Calculate Heat loss from collector?

Heat loss from collector calculator uses Heat Loss from Collector = Overall loss coefficient*Area of absorber plate*(Average temperature of absorber plate-Ambient Air Temperature) to calculate the Heat Loss from Collector, The Heat loss from collector formula is defined as the heat losses that occur from the plate due to convection, conduction, and radiation. Heat Loss from Collector is denoted by q_l symbol.

How to calculate Heat loss from collector using this online calculator? To use this online calculator for Heat loss from collector, enter Overall loss coefficient (U_l), Area of absorber plate (A_p), Average temperature of absorber plate (T_pm) & Ambient Air Temperature (T_a) and hit the calculate button. Here is how the Heat loss from collector calculation can be explained with given input values -> 162.5 = 1.25*13*(310-300).

FAQ

What is Heat loss from collector?

The Heat loss from collector formula is defined as the heat losses that occur from the plate due to convection, conduction, and radiation and is represented as q_l = U_l*A_p*(T_pm-T_a) or Heat Loss from Collector = Overall loss coefficient*Area of absorber plate*(Average temperature of absorber plate-Ambient Air Temperature). Overall loss coefficient is defined as the heat loss from collector per unit area of absorber plate and temperature difference between absorber plate and surrounding air, Area of absorber plate is defined as the area exposed to the sun that absorbs incident radiation , Average temperature of absorber plate is defined as the temperature spread across the surface area of the absorber plate & Ambient Air Temperature is the temperature where the ramming process starts.

How to calculate Heat loss from collector?

The Heat loss from collector formula is defined as the heat losses that occur from the plate due to convection, conduction, and radiation is calculated using Heat Loss from Collector = Overall loss coefficient*Area of absorber plate*(Average temperature of absorber plate-Ambient Air Temperature). To calculate Heat loss from collector, you need Overall loss coefficient (U_l), Area of absorber plate (A_p), Average temperature of absorber plate (T_pm) & Ambient Air Temperature (T_a). With our tool, you need to enter the respective value for Overall loss coefficient, Area of absorber plate, Average temperature of absorber plate & Ambient Air Temperature and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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