There is a great debate around the ways identity is shaped online, mainly as a result of understanding the online as networked individuals. The present papers tries to open the discussion on whether the quasi-synonym words constantly used to talk about the online communication cyber, virtual and digital define the same reality or whether they can be associated with particular aspects of the identity forged within the computer mediated communication. The search for the differentiating aspects is carried out against the backdrop of technological development which inevitably alters with every new aspect unveiled a new side of each individual's identity.
The paper puts in perspective the aspects of classic valve construction and the use of off-the-shelf products in order to improve the valve's features in terms of user interface, valve status in operating conditions and control interface to classic standardized communication protocols, such as EtherCAT®, ProfiBUS®. Because the resulting products are meant to be functional prototypes, most parts used for implementing new features will not be fully developed as for a sellable product, but only to the stage of proof-of-concept. To fully develop the used equipment will imply a dedicated study, which would allow the shift from general purpose use development boards and breakout sensor boards to application-specific equipment designed for assembly line manufacturing. The same study includes the use of Internet-of-Things in industrial environment and will be the subject of separate and dedicated article. The paper only mentions the possibilities and ways of achieving future design ideas.
The paper presents the functioning regimes of a 132 kW asynchronous three-phase machine, used for the expander-generator system in a compressed air energy storage facility. The installation consists of a 110 kW twin-screw electro-compressor, which supplies pressurized air up to ~16 bar into a 50 cubic meters storage vessel. The compressed air is afterwards released from the reservoir into expander’s inlet, spinning its shaft. When the expander’s shaft spins the electric machine over its synchronous speed, this one enters in generator mode, supplying electric power into the grid. Two power analysers installed on the automation control cabinet monitor the generated/absorbed power and the power supplied/consumed by the system from the grid. Using the data acquired by means of PLC during commissioning tests, we plotted the power curves, differential pressure and significant temperatures, as well as the electric machine’s speed.
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