All Answers Must Have 5-7 Sentences Each, Must Be In Own Words 1. What Is
All answers must have 5-7 sentences each, must be in own words 1
What is solar radiation? Explain with help of plank’s energy distribution (spectrum) diagram
2
How do you calculate total irradiance from the sun? 3
Explain Stefan-Boltzmann law, Weins displacement law, and inverse square law
4
Calculate total energy emitted by sun
(find energy emitted per unit area using S-B law, then multiply that with surface area of sun)_ 5
Calculate total energy emitted by earth
6
What is solar irradiance and what is its value on the surface of the earth
7
Explain a) scattering b) absorption and c) reflection of solar radiation 8
Explain the phenomena selective absorption in the atmosphere
9
Explain the terms a) irradiation b) radiosity c) Insolation d) solar constant 10
Explain summer and winter solstice 11
Explain monthly insolation at different latitudes on the surface
12
What is solar altitude angle and azimuth angle? 13
What is daily insolation and how do you calculate it
What are factor influencing it? 14
Explain with a diagram the -physics’ behind a flat solar collector
15
How do you calculate energy absorbed and lost by a receiver of flat plate collector
16
Explain specular, diffuse and general deflection of light
17
How do you calculate energy ultimately absorbed in a flat plate collector
18
What is Heat removal factor 19
How do you calculate efficiency of a flat plat collector? 20
For a flat plate collector if the transmittity, absorptivity and reflectivity are respectively 0
7, 0
8 and 0
7 respectively
Calculate the fraction of solar energy ultimately absorbed
21
The flat plate collector in Q20 has area 20 m2
Solar radiation intensity available to the plate is 200W/m2
Calculate the amount of radiation absorbed by the plate
22
For the same collector, if the surface temperature is 80oC and ambient temperature is 25oC
The overall heat transfer co-efficient is 15W/m2oC
Calculate the heat loss to surrounding from the collector 23
Calculate energy utilized by the absorber 24
Water is used to remove heat from the collector
The temperature of fluid at inlet and out let of the collector is 20 and 89oC respectively
Calculate the mass flow rate required
25
Calculate the heat removal factor for the collector 26
Calculate collector efficiency
