Apparatus for determining amount of gases dissolved in liquids
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorScott Gowing
Life of this patent
Estimating the term…
Abstract
The quantity of gases dissolved in liquids is determined by introducing a quid sample into a hollow cylinder with a plunger, retracting the plunger to create a void space into which gases originally dissolved in the liquid sample diffuse, compressing the gases into a reduced volume, measuring the absolute pressure of the gases, and calculating the amount of gases originally dissolved in the liquid from the absolute pressure, the temperature, the vapor pressure of the liquid at the prevailing temperature, the volumes of liquid and the final volume of the gas, by using the ideal gas law.
Claims16
Apparatus for determining the amount of gas which is dissolved in liquid, comprising:
- a hollow member having a vertical cylindrical body, a closed upper end, an open lower end, and at least one port, said cylindrical body being substantially symmetrical with respect to the longitudinal axis of said member, each said port being located in said cylindrical body near said closed upper end;
- at least one shutoff valve, each said shutoff valve corresponding to a different said port, said member having a capacity which is fluid-tight when every said port is closed;
- a piston device which enters said member through said open lower end and is movable, slidably and fluid-tightly with respect to the inside surface of said cylindrical body, in the direction of said axis, so as to decrease said capacity when said piston device is moved upward and increase said capacity when said piston device is moved downward;
- whereby said member may be caused to exclusively contain a selected volume of liquid and a selected volume of gas, said selected volume of gas filling the upper portion of said capacity and said selected volume of liquid filling the lower portion of said capacity, said selected volume of gas consisting essentially of gas which has been dissolved in and has diffused from said selected volume of liquid;
- and
- a device which is coupled with said closed upper end, said device approximately aligned with said axis and disposed to measuring the absolute pressure of said selected volume of gas.
Apparatus for determining the amount of gas dissolved in a liquid, comprising:
- a hollow cylinder which is normally placed in the vertical position whereby said hollow cylinder has a closed top end and an open bottom end and at least one port, each said port located near said closed end;
- at least one valvular passage, each said valvular passage associated with a different said port, said at least one valvular passage being for introducing liquid into, and removing liquid and gas from, said cylinder;
- a plunger having a periphery which forms a fluid-tight seal and is slidable with respect to the inside surface of said cylinder, said plunger entering said cylinder through said open end;
- a transducer for producing a signal corresponding to absolute pressure within said cylinder, said transducer located within said cylinder and closely joined at said closed end;
- electrical wiring;
- an indicator of said absolute pressure, said indicator connected by said electrical wiring to said transducer and located outside said cylinder.
Apparatus for determining the amount of gaseous matter which is dissolved in liquid matter, comprising:
- a vertical cylindroid container which has a sealed upper end, an apertured lower end, and a passage which is proximate said sealed upper end;
- a shutoff valve for said passage;
- a plunger which enters said container through said apertured lower end, said plunger being downwardly movable for increasing the capacity within said container and upwardly movable for decreasing the capacity within said container;
- a device which is centrally mounted to said sealed upper end within said container, said device being for measuring the absolute pressure of gaseous matter which is adjacently below said sealed upper end, said gaseous matter occupying the upper portion of said capacity and having diffused from said liquid matter occupying the lower portion of said capacity.
Dependencies are inferred from the claim text.