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Tag: PAC
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Le lycée Raspail, le lycée des métiers de l'énergie et de l'environnement de Paris

Extrait du dossier paru dans la Revue Générale du Froid & du conditionnement de l'air - Septembre 2011:

(...) En réfrigération, plusieurs installations présentant des combinaisons différentes et travaillant à divers niveaux de température sont utilisées. Les systèmes de régulation sont renouvelés de sorte à enseigner avec des technologies de pointe. Pour preuve une chambre froide pilotable à distance, par les élèves comme par les enseignants. Cette dernière servira d'ailleurs à la rentrée prochaine de support de formation à distance (FOAD). (...)

Retour à l'article décrivant le banc frigorifique

LabVIEW Real-Time: refrigeration system with two temperatures

This system allows the study of refrigeration systems and the implementation of the thermodynamic calculations applied to refrigeration. Its uniqueness is that it is fully controllable via the Internet directly from a web browser like Internet Explorer or Firefox.

It consists of two cold rooms, each with their own evaporator but sharing the same cooling fluid R134a system (compressor, condenser ...).

The control and configuration of this system can be done in two ways:

a classic console coupled to a regulator PLC type industrial PAC (programmable automation controller) Compact Fieldpoint

The Compact Fieldpoint adds the possibility of remote control via the Internet, viewing the evolution curves of temperature, air and refrigerant fluid, pressure and power at various points. This allows calculating the required cooling system features such as enthalpy, entropy, Mollier diagram and performance coefficients.

Refrigeration system with control panel and circuit fluid

 

MESSER - Industrial gases
Specifications and development of gas production quality test bench.

Technical implementation:

Tools: LabVIEW Harware: National Instruments Compact Fieldpoint, DAQ, DIO, RS 232 implementing AK protocol, Emerson Gas analysers
LabVIEW: test bench for gas analysis
The role of this test bench is the analysis and quality control of gas cylinders used in metallurgical industries, chemical, petrochemical, pharmaceutical and food industry. The control system of gas is functionally decomposed as follows: Entering management and production information of gas Measuring the gases composition, Analysis of measures and results, Archiving data to a remote database. The bench contains the following elements: Gas delivery system, Measurement instrumentation, Acquisition and control central, Management and supervision software. User interface of the supervision software for the gaz analysis bench