SIMPLE THERMODYNAMIC CALCULATIONS

Learn to easily use REFPROP or/and HEPAK software. Perform simple thermodynamical general cryogenic calculations, then application for the main components of a helium refrigeration plant.

Whom for?

Persons who want to be in a position to perform simple cryogenic calculations

Each participant brings his/her PC loaded with the REFPROP® (and, possibly, HEPAK®) software. Participants must be familiar with Excel®. The number of participants is limited to 10 for reasons of effectiveness. During the session, each participant builds his/her "Cryogenic Tool Box" that she/he keeps with him/her.

Later, she/he will use it routinely.

How long?

This educational session takes place within a two-day period (total time is around 14 hours).

PROGRAM TOPICS

- Reminders, picked up from the "Helium Refrigeration" standard modules, about characteristics of the components on which calculations are to be performed

- Operation of a room temperature compressor, calculation of the isothermal effectiveness

- How to easily use the REFPROP® or HEPAK® software

- Free expansion of a flow of helium with possible power input (as a result: a change in temperature)

- Reverse: calculation of the power that makes the temperature of a flow of helium change

- Calculation of a heat exchanger, starting from a very simple one (balanced flows at rather warm temperatures) then moving to a more complicated one (unbalanced at cold temperatures).

- Calculation of the discharge temperature of a cryogenic expander (turbine), according to inlet conditions, effectiveness and discharge pressure,

- Reverse: calculation of the effectiveness of an expander according to measurements

- Cryogenic compressor: same kind of calculations as for cryogenic expanders

- Equivalent power

Possibility to go farther: perform calculation of simple thermodynamic refrigeration cycles, including hydrogen liquefaction (on demand).