Assume a 10" diameter 10' long tube or pipe laying horizontally with a 2" wide slit all along its top side running it's full length.
One end is capped and the other has a fan drawing air into the pipe through this 2" slit all along its length.
Without changing the slit dimensions, is there...
Using some snap on radiators around galvanized tubes, as seen here...
Those radiators are also galvanized steel, same as the tubes, though
in that photo the tube looks to already be painted.
I need to maximize the thermal conductivity between the two surfaces.
Radiators don't easily...
For a 300 sq ft workshop that you'd not want to add humidity into directly with a swamp cooler, what if you made instead a 4" false ceiling of 2x4's on end, covered with thin plastic sheeting of minimal r-value, to blow cooler evaporative air through a serpentine baffle configuration to achieve...
Trying to narrow down what type and size radiator and flow of both the water and air I should be looking at that would give me my best heat exchange efficiencies, if I want to input 50F water into a radiator that will have 100F air (60% RH) blowing through it and my goal here is the cooling down...
Looking for recommendations for two commercially available films and coatings, the best for...
#1 - Maximum reflectance, regardless AOI, for short wave sunlight primarily and, secondarily,
reflects some or a lot of long wave, and thirdly, also good emissivity for any of the spectrum...
Among thin plastics, sheets and films, that are highly transparent to visible light, which are also best at reflecting or absorbing IR heat?
Are there any spray coatings to enhance a clear plastic surface reflecting even more IR without significantly degrading transparency to visible light...
Not sure if this is the best sub category to ask...
I've successfully raised Dissolved Oxygen (DO) in a hydroponic nutrient solution via electrolysis using this device here...
http://www.o2grow.com/
My question is, assuming starting with pure RO or distilled water, that has only had...
I need to cool a slow moving small flow of hydroponic plant water, at most 1000 ppm nutrients, with a pH of typically around 6.
I'd like to use aluminum or copper heat sink directly in that fluid stream to drop temp 10 or 20 degrees F down to 50-60F neighborhood.
My concern is I don't want to...
I understand that pure water that's being aerated will only take up just so much dissolved oxygen (DO) and that that depends on the temperature of the water. I see ranges of 14 ppm at close to freezing and around 6 ppm at 50 C as normal maximums.
I understand, too, that you can temporarily...
For water pressure ranging between 80 and 150PSI in a 1/2 inch pipe with little to no back pressure,
looking for recommendations for a solenoid valve with an adjustable timer that can be user specified
to open for 1 to 5 seconds and then close for 1 to 5 minutes, repeatedly 24/7. Water and...
I'm looking at small greenhouse application in hot/dry desert summer, small enough
that if glazing or film is a little exotic/pricey, but really does the job, is acceptable.
That it also diffuses incoming light would be a plus, too.
Water for evaporation cooling and electricity for pumps...
Assume a flat one square foot vertical plate attached 6 feet up, outside on a wall.
Dozens of yards away are various solar reflectors angled to reflect sunlight onto that plate.
Problem is, the plate requires to be only struck straight on at a 0 degree angle of incidence.
And, all the...
This 400-700nm slice is the Photosynthetically Active Radiation (PAR) required of plants and, for many applications, there is much unwanted UV and IR heat outside of it.
Is there any known translucent material or film that will pass a high % of that 400-700nm wavelength from sunlight while...
Assume two hollow sealed clear glass spheres, let's say both about 2 foot diameter each.
Glass is typical thickness and transparency of single pane window, inside just trapped air.
Temperature of spheres and air inside and outside is the same, 70 degrees F, for both spheres
when first...
More specifically, if I have 100 degree F hot rock in an insulated box with reflective sides and I want it to radiate it's heat away to cooler outer space at night through its open top, is there any class of materials or thin film to cover the box with that would assure no air passed in or out...
Exploring practical options for towing a small/light flat bed trailer up mountain side that while flat at bottom gets progressively steeper until almost vertical right before it rounds out cresting at the top.
Maximum design load not to be exceeded, not including trailer weight which has not...
