“West Bengal has been discussing with us for setting up pumped storage systems along with solar generation facilities and has been asking for our support from the Clean Energy Fund. We have liked the idea and are in the process of preparing a package that would be announced in the next few weeks,” Union power minister Piyush Goyal said at Global Bengal Summit today.
Light-emitting diodes, or LEDs, offer the highest luminous efficacy and lifespan of all residential and commercial lighting options. While they often come with the highest price tag, LEDs consume 75% less energy than incandescent bulbs and 40% less than fluorescent lighting. LEDs also outlive competing technologies, lasting 25 times longer than incandescent and halogen bulbs, and three times longer than most CFLs. In addition to energy efficiency, this lighting technology generates little heat and boasts robust construction, owing to the fact that it has no filament that can break.
Using dirty water to generate clean water may sound like an unhygienic scam, but it’s about to become reality in Aarhus, Denmark. The city’s Marselisborg Wastewater Treatment Plant just got a new, state-of-the-art upgrade enabling it to generate 192 percent of its energy needs from sewage.
Wastewater processing facilities are notoriously energy-hungry, consuming roughly eight percent of the world’s electricity. With new energy-efficiency measures and its $3.19-million electricity-generating upgrade, the Marselisborg plant is a glimpse into the future of wastewater power.
Hardware Components of a PLC System
Processor unit (CPU), Memory, Input/Output, Power supply unit, Programming device, and other devices.
Central Processing Unit (CPU)
CPU – Microprocessor based, may allow arithmetic operations, logic operators, block memory moves, computer interface, local area network, functions, etc.
CPU makes a great number of check-ups of the PLC controller itself so eventual errors would be discovered early.
The internal paths along which the digital signals flow within the PLC are called busses.
The system has four busses:
– The CPU uses the data bus for sending data between the different elements,
– The address bus to send the addresses of locations for accessing stored data,
– The control bus for signals relating to internal control actions,
– The system bus is used for communications between the I/O ports and the I/O unit.
System (ROM) to give permanent storage for the operating system and the fixed data used by the CPU.
RAM for data. This is where information is stored on the status of input and output devices and the values of timers and counters and other internal devices. EPROM for ROM’s that can be programmed and then the program made permanent.
Inputs monitor field devices, such as switches and sensors.
Outputs control other devices, such as motors, pumps, solenoid valves, and lights.
Most PLC controllers work either at 24 VDC or 220 VAC. Some PLC controllers have electrical supply as a separate module, while small and medium series already contain the supply module.
The programming device is used to enter the required program into the memory of the processor.
The program is developed in the programming device and then transferred to the memory unit of the PLC.
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He had to make a choice between his professional career and conveying to the public, scientific discoveries that could change the world for the better. This man faced CIA agents who came to his door asking questions about his new discoveries. He was previously warned by his colleagues not to continue the controversial research. He was threatened to lose his job, but, despite this, Dr. Campbell chose to lay out the truth.
The news about lighting is that there has been a revolution in solid-state lighting (SSL).
The extent of the revolution can be gleaned from Dr. Mark Rea, director of the Lighting Research Center (LRC) at Rensselaer Polytechnic Institute in New York. “There was a story line in lighting that you never displace a light source, you can only add a new one to the family,” he says. “LEDs have changed all that.”
If you work in Silicon Valley, you’ve heard this prevailing wisdom ad nauseum: The best mobile apps do just one thing well. It’s why Facebook introduced Messenger as a standalone app, why Google has Google Search, Google Play and Google Maps (not to mention Drive, Gmail, Google+, Hangouts…I could go on), and why Facebook paid a billion dollars for Instagram, a company that has not branched out to do more than photo sharing. It’s why everyone in Silicon Valley was – as briefly as the app’s own moniker – talking about “Yo.”
But that little piece of wisdom is the motivational poster equivalent of app design. It sounds good. It’s easy to repeat. But it’s not entirely true. There are over 2.2 million apps available in Google Play and more than 2 million in the App Store today. By next year, nearly 95 percent of downloads will be free apps, most of which have no revenue model at all. Of those few applications that are paid, 90 percent will see less than 500 downloads a day. Without additional utility, most of these micro-apps will disappear – and soon. It’s estimated that by 2018, less than 0.01 percent of consumer mobile apps will be financially viable. In their place, super-apps, which fill multiple needs and serve multiple use cases within a single application, will rise to fill the void.