For the liquid nitrogen in the top of lower column, part of it will be drawn out and go to the top of upper column to follow the rectification, and the rest will be extracted as product.
The main body of the liquid nitrogen generator has a cryo cooler for liquefying nitrogen gas, a vacuum heat-insulated vessel to store the liquid nitrogen, a level gauge, safety devices, and a control system in it.
With liquid nitrogen, they are cooled down to an operation temperature of about 77 kelvin, i.e. minus 196°C, and can be operated at comparably low costs, be-cause less energy is needed for cooling.
A liquid nitrogen generator consists of a nitrogen gas generator that separates and extracts nitrogen gas from the air(generation method: pressure swing adsorption(PSA)) and a main body that liquefies the nitrogen gas.
Type: Photo| Okinawa Institute of Science and Technology Graduate University OIST(From left) Graduate students Matti Krueger, Leonidas Georgiou and Collin Stecker stir ice cream frozen with liquid nitrogen during a demonstration at 2015 Open Campus.
The reason we were able to come up with this is two key ideas: One is that this is similar to a cryogenic Dewar, something you would keep liquid nitrogen or liquid helium in.
Open Campus 2015| Okinawa Institute of Science and Technology Graduate University OIST(From left) Graduate students Matti Krueger, Leonidas Georgiou and Collin Stecker stir ice cream frozen with liquid nitrogen during a demonstration at 2015 Open Campus.
Application fields For application of liquid nitrogen, liquid hydrogen, liquid oxygen, etc. in fields such as electric power industry, petroleum refining, petrochemical engineering, offshore oil, chemical engineering in urban construction, etc.
For the compact monochromator, two Si channel cut crystals cooled by liquid nitrogen, are driven by servo motor coupled with a rotary feedthrough using magnetic fluid.
Although past research had concentrated only on extremely low temperatures, this was the first research that focused on the behavior of electrical conductivity from the temperature of liquid nitrogen to around room temperature.
The superconducting magnetic bearing was cooled with a commercially available compact cooler, removing the need for liquid nitrogen etc., and electric power consumption was less than 1% of output power.
If you pay 100,000 dollars, you can arrange to have your body frozen after death and stored in liquid nitrogenin one of these tanks in an Arizona warehouse, awaiting a future civilization that is advanced to resurrect you.
Even at such elevated temperatures, an efficient internal water cooling circuit keeps the temperature of the surrounding components within a safe range, thereby reducing the liquid nitrogen consumption of the IR detector.
Due to the February 1987 discovery of an YBa2Cu3Ox superconductor(the critical temperature: 90 k), the critical temperature exceeded the temperature of liquid nitrogen(77 k) for the first time.
Much like electrical vehicles, liquid nitrogen vehicles would ultimately be powered through the electrical grid, which makes it easier to focus on reducing pollution from one source, as opposed to the millions of vehicles on the road.
Since the equipment itself is expensive(it costs nearly 10 million yen) and maintenance costs are high(the liquid nitrogen needs to be constantly cooled and more than several tens of thousands yen per month), most of citizen measurement rooms cannot purchase it.
The liquid nitrogen produced in the lower column enters into the upper column to take part in the rectification after passing through sub-cooling, the waste nitrogen passed through the main heat exchanger is drawn out of the column as regeneration gas for purifier.
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