SU1247663A1 - Method of determining volume of reservoir - Google Patents

Abstract

The invention relates to a measurement technique and allows to increase the speed by accelerating the achievement of thermal equilibria. Air from tank 1 (/) C / 3 and vacuum chamber 2 is pumped out with the help of pumps 3 and 4 to a pressure in them that is smaller by an order of magnitude of sensitivity of the pressure gauge 10. Through valve 8, gas from chamber 6 filled to tank 1 is up to a predetermined overpressure and pre-weighted. After the bypass is completed, the chamber 6 is weighed again, the temperature and pressure of the pressure gauge 10 are measured by the thermometer 11, using the measurement results for the calculated volume of the container. Placing the container 1 in the vacuum chamber 2 makes it possible to reach the equilibrium state of the gas much faster due to the absence of heat exchange with the environment. 1 il. I SL yu 1 "od od sd 7" 4

Description

I

The invention relates to a measurement technique and can be used to quickly determine the volume of large tanks.

The aim of the invention is to increase speed.

The drawing shows a diagram of the device that implements the proposed sp9sob. . ; ,,

The device includes a tank 1, placed ": vacuum chamber 2, pumps 3 C: 4 DL9 pumping air from tank 1 and vacuum chamber 2, respectively, instruments 5 for controlling the degree of pumping, chamber 6 with compressed gas, valves 7-9 , pressure gauge 10 and thermometer 11.

The method is carried out as follows.

Chamber 6 is pressurized to a predetermined overpressure and weighed. Pumps 3 and 4 pump air from tank 1 and vacuum chamber 2, controlling the degree of pumping by instruments 5. When air pressure in tank 1 and vacuum chamber 2 reaches, a value less than the sensitivity threshold of the pressure gauge 10 is less, pumping is stopped and valves 7 are closed and 9. Opening the valve 8 starts the gas bypass to the tank 1. After the bypass is finished, the valve 8 is closed and the chamber 6 is weighed again, thereby determining the mass of gas in the tank 1. Measure the temperature T with thermometer 11 and pressure P with pressure gauge 10.

Volume V is calculated by the formula

„G-R-T V

Compiled by A. Ivanov Editor L. Veselovska Tekhred L. Oleinik Proofreader O-Lugova

4111/38

Circulation 705 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

12476632

where R is a gas constant.

The use of the proposed method for determining the volume of containers provides the following advantages compared to the existing ones: an increase in accuracy (more than 2.5 times) due to the elimination of one measurement of gas state parameters, a significant reduction in the time (more than 2 times) of measurements by accelerating temperature equalization processes parts of the gas-capacity system in a thermally insulated capacity, the gas reaches equilibrium more quickly than in an uninsulated one, since in this case, in the absence of heat exchange with the environment / heat medium, heat is redistributed between the gas layers.

Claims (1)

Invention Formula The method of determining the volume of the tank, including creating an overpressure in the chamber, determining the mass of the gas, passing the gas from the chamber to the tank, measuring the temperature and pressure of the gas, and determining the volume of the tank using the design formula, which is aimed at accelerating the speed reaching thermal equilibria, the tank is placed in a vacuum chamber before the bypass and evacuated from the outside and from the inside, after the bypass of the gas is disconnected from the chamber, and the mass of the gas, temperature and pressure in the tank are determined after overpowering start.