Definitely some good thoughts, I may include in a technical write up.
Had a chance to test the materials this morning, to my surprise the detector continued working with all of them. The first test piece was 10mm 'armoured' clear acrylic normally used in the windows on yachts. The second was...
Could you explain the reasoning behind the quarter wave window?
I've been read the article about EM penetration depth on wikipedia, but this has led to more questions than answers really (e.g. how well does acrylic reflect radar and what is the complex refractive index of acrylic at 24GHz?)...
Thanks, think I will experiment with the materials and see if the signal still gets through. There's a limited budget so it would be better not to have to order in specialist materials.
I'll update the thread with my findings.
I’m currently working a project to produce a roadside speed camera which displays vehicle speed to drivers to improve speed awareness.
A Doppler radar gun operating at 24.1GHz (1.24cm) is being used as the source and detector. There is a weather tight plastic box (opaque, at least to visible...
Hello, I am working a on a project to improve the thermal properties (heat capacity, thermal conductivity) of heat transfer fluids used in concentrated solar power (CSP). First a suitable base fluid is required, the higher the working temperature the better for thermal efficiency. Most of the...
I might be making a mistake here but I was imagining that the bushings would act as plain bearing and seal the loop at the same time. In the diagram I have shown exaggerated gaps between the bushings, I was think that the pressure would hold the circular bushings tight and sealed. As I say this...
Thanks for your response, I was beginning to think this project is impossible. I've been in contact with a company called graphalloy which makes graphite bushings which can deal with high temperature. No water jacket would be required with a graphite bearing which could allow the shaft to be...
Hello, I am trying to find a bearing that will allow a shaft to pass into a loop with 50bar of pressure. The basic schematic is the idea since this thread:
The water jacket protects the bearing from high temperature as the oven will heat up the fluid to a maximum of 450dC. I assume I will...
Hello, I have recently started work as a researcher at a university investigating heat transfer fluids (HTF). One of the tasks is to build a pumping test rig to simulate plant conditions. One of the fluids being tested is a eutectic mix of biphenyl and diphenyl oxide which is similar in density...
I'm assuming for the moment that starlite is a hoax, but it still captures interest due to the potential of such a material. Debunking the video and/or finding some trickery involved would make it easier to forget about.
I find the tomorrow's world video the most compelling evidence (sound is very low but is there):
http://www.youtube.com/watch?v=W4nnLP--uTI"
Why would tomorrow's world get in on a hoax? Possibly bribery or wanting to make the show more interesting, but how would they have done it. An...
Perhaps I should create a new thread, but I think the original question has been answered. The 1/v rule is obeyed below the first excitation energy of the isotope.
The other information was related to my motivation for asking about cross sections.
I should have mentioned that the carnot cycle is the most efficient theoretical heat engine, this is never achieved in the real world power cycles but it does stand that a higher dT results in higher thermal efficiencies, for all cycles (thermodynamics 101 really). A high temperature reactor...
Lighter nuclei are more effective at neutron moderation:
Purely from the point of view of moderation you are right about heavy water, but in terms of efficiency and plant cost not necessarily as water cooled and moderated plants operate high pressure (2-300bar) (more expensive safety...