Clarification.
Hi Bobbywhy,
Looking back, I have been vague on the details. I want to make a solar simulator. The problem is the sun is not consistent. Therefore testing cannot be repeated, and must wait for the next day with appropriate DNI to achieve test results.
The aim of this...
Hi Etudiant,
If I can successful project collimated light onto a parabolic surface of 1.8m^2 with an intensity of 1000W/m^2 at the surface, I can then concentrate that light to hopefully 500 suns onto my target area of 3600mm2.
Hi Bobbywhy and Etudiant,
As it turns out the problem gets more and more complicated.
The parabolic dish idea is still in. The light source needs to be collimated.
CR = D^2/Fa^2
Concentration Ratio = Diameter of the Dish squared / Focus Area squared.
This means to achieve my target of 500...
Hi All,
Not sure where this topic should be placed but it involves optical and electronics.
I want to design a solar simulator that can concentrate the light onto a photovoltaic of area of 3600mm2. The concentration of sunlight target is 500suns to 1000suns. The goal is to be able to...
Hello,
I have just found out that on average when a single blower is run at 4500 rpm we have a -15 to -20 kPa vacuum pressure on the inlet and roughly 30kPa out the outlet.
So we if ran two blowers on series at 4500 rpm then a theoritcal -40 kPa could be generated.
what does that mean...
Hello,
Thanks for the reading material. The oulet is fed back into a tank that cannot be pressurised. I'm guessing the outlet pressure must be lower than the inlet vacuum.
The battery in series analogy works for me. I did some further investigations, and the second pumps acts like a cavity...
Hello,
I was hoping for some information on vacuum systems.
There are two side channel blowers that produce -8kPa of pressure on the inlet. The outlet pressure in roughly the same.
The two blowers are connected in series.
Can some please refer me to some reading material so that I...
@ threadmark
this may come as a stupid question, but if we know the average velocity, do we need to know the speed upon impact?
Cheers
K
P.S.
For the test equipment, I thought that the time of impact may be crucial. I was thing of using a sensor (don't know which type yet) to just...
Hello,
I probably should have stated the know variables which are;
Mass of Ball
Mass of the Mass (LOL)
Average Velocity of Ball
And Height.
Below is an image of a more refined idea. We know that the some of the kinetic energy will be transferred into the mass in the form of kinetic...
Hello,
I have been trying to get my head around the concepts of energy, work and momentum. I am trying to build some testing equipment to measure the "transfer of energy" of a moving object striking a pendulum type mass, but am unsure if my physics is correct.
The image attached is my idea...
Homework Statement
I would like to know if Hooke's law applies to compression as well as tension? Meaning if the spring is stretched or compressed is the spring constant the same?
Homework Equations
F = -kx
The Attempt at a Solution