## Collection efficiency when heat removal factor is present Solution

STEP 0: Pre-Calculation Summary
Formula Used
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))
ηi = FR*(Ap/Ac)*(Sflux/IT-((Ul*(Tfi-Ta))/IT))
This formula uses 9 Variables
Variables Used
Instantaneous Collection Efficiency - Instantaneous collection efficiency is defined as ratio of useful heat gain to radiation incident on collector.
Collector heat removal factor - Collector heat removal factor is the ratio of the actual heat transfer to the maximum possible heat transfer through the collector plate.
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 .
Gross Collector Area - (Measured in Square Meter) - Gross collector area is the area of the topmost cover including the frame.
Flux absorbed by plate - (Measured in Watt per Square Meter) - Flux absorbed by plate is defined as the incident solar flux absorbed in the absorber plate.
Flux Incident on Top Cover - (Measured in Watt per Square Meter) - Flux Incident on Top Cover is the total incident flux on the top cover which is the sum of incident beam component and incident diffuse component.
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.
Inlet fluid temperature flat plate collector - (Measured in Kelvin) - Inlet fluid temperature flat plate collector is defined as the temperature at which the liquid enters the liquid flat plate collector.
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
Collector heat removal factor: 0.1 --> No Conversion Required
Area of absorber plate: 13 Square Meter --> 13 Square Meter No Conversion Required
Gross Collector Area: 11 Square Meter --> 11 Square Meter No Conversion Required
Flux absorbed by plate: 98 Joule per Second per Square Meter --> 98 Watt per Square Meter (Check conversion here)
Flux Incident on Top Cover: 450 Joule per Second per Square Meter --> 450 Watt per Square Meter (Check conversion here)
Overall loss coefficient: 1.25 Watt per Square Meter per Kelvin --> 1.25 Watt per Square Meter per Kelvin No Conversion Required
Inlet fluid temperature flat plate collector: 10 Kelvin --> 10 Kelvin No Conversion Required
Ambient Air Temperature: 300 Kelvin --> 300 Kelvin No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
ηi = FR*(Ap/Ac)*(Sflux/IT-((Ul*(Tfi-Ta))/IT)) --> 0.1*(13/11)*(98/450-((1.25*(10-300))/450))
Evaluating ... ...
ηi = 0.120939393939394
STEP 3: Convert Result to Output's Unit
0.120939393939394 --> No Conversion Required
0.120939393939394 <-- Instantaneous Collection Efficiency
(Calculation completed in 00.015 seconds)
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## < 10+ Liquid Flat Plate Collectors Calculators

Collection efficiency when collector efficiency factor is present
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
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
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
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
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
Instantaneous Collection Efficiency = (0.692-4.024*(Inlet fluid temperature flat plate collector-Ambient Air Temperature))/Flux Incident on Top Cover
Transmissivity Absorptivity product
Transmissivity - Absorptivity product = Transmissivity*Absorptivity/(1-(1-Absorptivity)*Diffuse Reflectivity)
Instantaneous collection efficiency
Instantaneous Collection Efficiency = Useful heat gain/(Gross Collector Area*Flux Incident on Top Cover)
Useful heat gain
Useful heat gain = Area of absorber plate*Flux absorbed by plate-Heat Loss from Collector
Bottom loss coefficient
Bottom Loss Coefficient = Thermal Conductivity of Insulation/Thickness of Insulation

## Collection efficiency when heat removal factor is present Formula

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))
ηi = FR*(Ap/Ac)*(Sflux/IT-((Ul*(Tfi-Ta))/IT))

## What does collection efficiency mean?

It is the amount of energy removed by the transfer fluid over a given measuring period divided by the total incident solar radiation onto the gross collector area during the measuring period.

## How to Calculate Collection efficiency when heat removal factor is present?

Collection efficiency when heat removal factor is present calculator uses 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)) to calculate the Instantaneous Collection Efficiency, Collection efficiency when heat removal factor is present formula is defined as the ratio of useful heat gain to the radiation incident on the collector. Instantaneous Collection Efficiency is denoted by ηi symbol.

How to calculate Collection efficiency when heat removal factor is present using this online calculator? To use this online calculator for Collection efficiency when heat removal factor is present, enter Collector heat removal factor (FR), Area of absorber plate (Ap), Gross Collector Area (Ac), Flux absorbed by plate (Sflux), Flux Incident on Top Cover (IT), Overall loss coefficient (Ul), Inlet fluid temperature flat plate collector (Tfi) & Ambient Air Temperature (Ta) and hit the calculate button. Here is how the Collection efficiency when heat removal factor is present calculation can be explained with given input values -> 0.120939 = 0.1*(13/11)*(98/450-((1.25*(10-300))/450)).

### FAQ

What is Collection efficiency when heat removal factor is present?
Collection efficiency when heat removal factor is present formula is defined as the ratio of useful heat gain to the radiation incident on the collector and is represented as ηi = FR*(Ap/Ac)*(Sflux/IT-((Ul*(Tfi-Ta))/IT)) or 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 is the ratio of the actual heat transfer to the maximum possible heat transfer through the collector plate, Area of absorber plate is defined as the area exposed to the sun that absorbs incident radiation , Gross collector area is the area of the topmost cover including the frame, Flux absorbed by plate is defined as the incident solar flux absorbed in the absorber plate, Flux Incident on Top Cover is the total incident flux on the top cover which is the sum of incident beam component and incident diffuse component, 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, Inlet fluid temperature flat plate collector is defined as the temperature at which the liquid enters the liquid flat plate collector & Ambient Air Temperature is the temperature where the ramming process starts.
How to calculate Collection efficiency when heat removal factor is present?
Collection efficiency when heat removal factor is present formula is defined as the ratio of useful heat gain to the radiation incident on the collector is calculated using 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)). To calculate Collection efficiency when heat removal factor is present, you need Collector heat removal factor (FR), Area of absorber plate (Ap), Gross Collector Area (Ac), Flux absorbed by plate (Sflux), Flux Incident on Top Cover (IT), Overall loss coefficient (Ul), Inlet fluid temperature flat plate collector (Tfi) & Ambient Air Temperature (Ta). With our tool, you need to enter the respective value for 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 and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Instantaneous Collection Efficiency?
In this formula, Instantaneous Collection Efficiency uses 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. We can use 4 other way(s) to calculate the same, which is/are as follows -
• Instantaneous Collection Efficiency = Useful heat gain/(Gross Collector Area*Flux Incident on Top Cover)
• Instantaneous Collection Efficiency = (0.692-4.024*(Inlet fluid temperature flat plate collector-Ambient Air Temperature))/Flux Incident on Top Cover
• 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)
• 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) Let Others Know