## Declination angle Solution

STEP 0: Pre-Calculation Summary
Formula Used
Declination Angle = 23.45*sin(0.9863*(284+Number of days))
δ = 23.45*sin(0.9863*(284+N))
This formula uses 1 Functions, 2 Variables
Functions Used
sin - Trigonometric sine function, sin(Angle)
Variables Used
Declination Angle - (Measured in Radian) - The declination angle of the sun is the angle between the equator and a line drawn from the centre of the Earth to the centre of the sun.
Number of days - Number of days are the total number of days counted from January 1.
STEP 1: Convert Input(s) to Base Unit
Number of days: 30 --> No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
δ = 23.45*sin(0.9863*(284+N)) --> 23.45*sin(0.9863*(284+30))
Evaluating ... ...
δ = 22.7132972358839
STEP 3: Convert Result to Output's Unit
22.7132972358839 Radian -->1301.37607044255 Degree (Check conversion here)
1301.37607044255 1301.376 Degree <-- Declination Angle
(Calculation completed in 00.002 seconds)
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## < 8 Basics Calculators

Angle of incidence of sun rays
Angle Of Incidence = acos(sin(Latitude Angle)*(sin(Declination Angle)*cos(Tilt Angle)+cos(Declination Angle)*cos(Surface Azimuth Angle)*cos(Hour angle)*sin(Tilt Angle))+cos(Latitude Angle)*(cos(Declination Angle)*cos(Hour angle)*cos(Tilt Angle)-sin(Declination Angle)*cos(Surface Azimuth Angle)*sin(Tilt Angle))+cos(Declination Angle)*sin(Surface Azimuth Angle)*sin(Hour angle)*sin(Tilt Angle))
Hour Angle at Sunrise and Sunset
Hour angle = acos(-tan(Latitude Angle-Tilt Angle)*tan(Declination Angle))
Daylight Hours
Daylight Hours = 3600*acos(-tan(Latitude Angle)*tan(Declination Angle))
Tilt factor for reflected radiation = (Reflectivity*(1-cos(Tilt Angle)))/2
Energy Conversion Efficiency of Solar Chimney
Max Efficiency of a Solar Chimney = 9.81*Height of Chimney/(1005*Ambient Air Temperature)
Tilt factor for diffused radiation = (1+cos(Tilt Angle))/2
Declination angle
Declination Angle = 23.45*sin(0.9863*(284+Number of days))
Hour angle
Hour angle = (Solar time/3600-12)*15*0.0175

## Declination angle Formula

Declination Angle = 23.45*sin(0.9863*(284+Number of days))
δ = 23.45*sin(0.9863*(284+N))

## Declination angle, denoted by δ

The declination of the sun is the angle between the equator and a line drawn from the centre of the Earth to the centre of the sun. It varies seasonally due to the tilt of the Earth on its axis of rotation and the rotation of the Earth around the sun.

## How to Calculate Declination angle?

Declination angle calculator uses Declination Angle = 23.45*sin(0.9863*(284+Number of days)) to calculate the Declination Angle, The Declination angle formula is defined as the angle made by the line joining the centres of sun and earth with the equatorial plane. Declination Angle is denoted by δ symbol.

How to calculate Declination angle using this online calculator? To use this online calculator for Declination angle, enter Number of days (N) and hit the calculate button. Here is how the Declination angle calculation can be explained with given input values -> 22.7133 = 23.45*sin(0.9863*(284+30)).

### FAQ

What is Declination angle?
The Declination angle formula is defined as the angle made by the line joining the centres of sun and earth with the equatorial plane and is represented as δ = 23.45*sin(0.9863*(284+N)) or Declination Angle = 23.45*sin(0.9863*(284+Number of days)). Number of days are the total number of days counted from January 1.
How to calculate Declination angle?
The Declination angle formula is defined as the angle made by the line joining the centres of sun and earth with the equatorial plane is calculated using Declination Angle = 23.45*sin(0.9863*(284+Number of days)). To calculate Declination angle, you need Number of days (N). With our tool, you need to enter the respective value for Number of days and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well. Let Others Know