Calorimeters for making measurements at pressures above 1000 bar

Details Calorimeters for making measurements at pressures above 1000 bar Calorimeters for making measurements at pressures above 1000 bar

1976-07-27

1977-11-01

Goldstein, Herbert

Measuring and testing

Gas content of a liquid or a solid

By vibration

73190R, G01K 1700, G01N 2520

Patent

active

040559823

ABSTRACT:
A calorimeter for measuring the latent energy of a sample at a pressure of at least 1,000 bars has a test chamber enclosed in a substantially adiabatic enclosure. It has thick walls able to withstand the very high pressure, and is connected by capillary tubing to means for holding it at a set pressure. The test chamber and a reference body which is thermally equivalent to the chamber are surrounded by respective adiabatic jackets and symmetrically arranged in an isothermal enclosure which is held at a set temperature. A differential gas thermometer has bulbs in contact with the test chamber and with the reference body, and a two-input differential pressure measuring unit has each input connected by a capillary tube to one of the bulbs. The pressure measuring unit has a manometer capsule with a respective input on each side of a flexible membrane, a capacitive pickup for sensing the position of the membrane, and electronic readout means. It is enclosed in a thermally insulative case.

REFERENCES:
patent: 1247998 (1917-11-01), Parr
patent: 3316750 (1967-05-01), Takeya et al.
patent: 3339398 (1967-09-01), Barrall et al.
patent: 3593577 (1971-02-01), Monner
Aven, et al., "Adiabatic Specific Heat Calorimeter for the Temperange 4.degree.-15.degree.," Review of Sci. Inst., vol. 27, No. 8, 8/66.

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