Method for determining a volume thermal expansion coefficient of a liquid

Patent metadata

Field	Value
Publication number	US-9816951-B2
Application number	US-201414320638-A
Country	US
Kind code	B2
Filing date	Jun 30, 2014
Priority date	Jul 30, 2013
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

In order to determine a volume thermal expansion coefficient of a liquid, a sample of the liquid is placed inside a cell of a calorimeter followed by an incremental increase of pressure inside the cell containing the liquid. After each pressure increase heat flow into the cell and volume of the liquid are measured. Based on results of the measurements of the heat flow and accounting for initially evaluated cell volume, the volume thermal expansion of the liquid is determined.

First claim

The invention claimed is:

1. A method for determining a volume thermal expansion coefficient of a liquid comprising:
placing a sample of a first liquid having a known volume heat capacity into a calorimeter cell,
increasing a pressure inside the cell containing the sample of the first liquid having the known volume heat capacity and measuring a heat capacity of the sample at each pressure increase and calculating an effective cell volume,
cleaning the calorimeter cell,
placing a sample of a second liquid into the calorimeter cell,
increasing a pressure inside the cell containing the sample of the second liquid by injecting the second liquid,
measuring a heat flow into the cell after pressure increase; and
determining the volume thermal expansion coefficient of the second liquid as

α
=

α
c

+

δ
⁢

⁢
Q

dPV
⁡

(
p
)

⁢
T

,

where α is the volume thermal expansion coefficient of the second liquid,
α c is a volume thermal expansion coefficient of a material of the cell,
δQ is the heat effect determined after each pressure increase,
dP—is the pressure increase, and
V(p)—is the effective cell volume.

2. The method of claim 1 , wherein oil is used as the second liquid.

3. The method of claim 1 , wherein water is used as the second liquid.

4. The method of claim 1 , wherein a salt solution is used as the second liquid.

5. The method of claim 1 , wherein n-hexane is used as the first liquid.

Assignees

• Schlumberger Technology Corp

Inventors

• Dyshlyuk Evgeny Nikolaevich
• Mutina Albina Rishatovna
• Andersen Simon Ivar
• Schmidt Kurt

Classifications

• G01N33/28

  Oils {, i.e. hydrocarbon liquids} (edible oils or edible fats G01N33/03) · CPC title

• G01N33/18

  Water · CPC title

• G01N25/16 Primary

  by investigating thermal coefficient of expansion · CPC title

• G01N25/20

  by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity (calorimeters per se G01K) · CPC title

• G01N25/4866

  by using a differential method · CPC title