“Knowledge is action.
Knowledge is experience.
It does not persist.
Its durability is the moment.”
H. Hesse

discover the thermodynamic universe

ThermoVersum is a thermodynamic research initiative of Dr. Christian Ihmels in cooperation with the Laboratory for Thermopysical Properties (LTP GmbH). The main objectives of ThermoVersum are experimental and theoretical thermodynamic investigations. The experimental determination of density and speed of sound as function of temperature and pressure for all fluid phases is important for the development of reliable equations of state.  

Index

• The Critical Surface
• ThermoVersum - at a glance
• ThermoVersum - viscosity measurements
• ThermoVersum - experimental home at the LTP GmbH
• ThermoVersum - contact

The Critical Surface

It is a widely unknown or unrecognized fact that the vapor-liquid critical points of pure compounds and also of mixtures form a sail-like surface in the three-dimensional space of temperature, pressure and molar volume or density. In the paper 'E.C. Ihmels The Critical Surface, J. Chem. Eng. Data, accepted for publication, 2010' (link to the paper will be added as soon as published) the phenomenon of the critical surface was published. Here some additional information and further developments are presented.

ThermoVersum - at a glance

Scopes, objectives, ranges, equipment, (planned) projects

• Density measurements (using vibrating tube densimeter and magnetic suspension balance)
• Speed of sound measurements
• High pressure and high temperature measurements
• Exploring liquid, compressed vapor, and supercritical phase
• Measurements on pure compounds (mostly organic), binary and ternary mixtures, salt solutions, etc.
• Development of new equations of state based on new experimental and literature data
• Computer controlled measurement system
• Proprietary control software AutoTPX
• Collection of experimental & theoretical thermodynamic literature
• Data collection literature available (mainly for pure component data)
• New measured data, correlations and equations of state will be published
• International collaborations with universities, institutes, and companies
   

ThermoVersum - viscosity measurements

With support of the Labor fuer Messtechnik Stabinger (LfM Stabinger) and Anton Paar GmbH (both Graz, Austria) a new project for measurements and experiments with a Stabinger viscometer (SVM 3000) was lunched 5/2007. With this equipment viscosity and density measurements at atmospheric pressure between 0 and 105 °C (150 °C) (with counter cooling down to -50 °C) are possible. A new control and recorder software DynaSol AP-Express (for Anton Paar devices SVM3000 and DMA4000 / 4500 / 5000) was recently developed.
 

ThermoVersum - experimental home at the LTP GmbH

The experimental ThermoVersum part was started in 2004 with the first project phase, planning and obtaining the main experimental equipment. Since 2005 needed equipment (e.g. vacuum technology) was obtained and developed. In 2006 first test runs of selected equipment were performed. In 2007 the third phase was started and first speed of sound measurements as function of temperature and pressure were realized. Since 2007 main parts of the experimental equipment of the ThermoVersum project are located at the Laboratory for Thermopysical Properties (LTP GmbH) in Oldenburg, Germany.

ThermoVersum - contact

For any question or hint please contact:

E-Mail: contact(at)thermoversum.com

Address:
Dr. Christian Ihmels
Hausbäker Weg 43
26131 Oldenburg
Germany

ThermoVersum was invented and initiated by Christian Ihmels. DynaSol and ThermoProp are trademarks of Christian Ihmels.

Last update: 2010-04-09 / version 10. This page is under construction and will be extended and updated.

Copyright © 2005-2010 Christian Ihmels
All Rights reserved.