Two costs are associated with any electrical appliance: the buying price, and the running cost in terms of energy and maintenance. Of the running costs, energy is one of the major items. Typically, the equipment can last several years before requiring a major repair.

Consumers should therefore not just look at the price tag on the item.  Rather, pay attention to its energy rating and available energy saving modes.

Energy star certified refrigerators and freezers are at least 9 and 10 percent more efficient respectively. Other considerations that help in saving energy include selecting the adequate capacity. In addition, the refrigerator or freezer should be kept in a cool place away from heat sources such as direct sunlight or ovens.

More energy savings can be realized by using the proper settings. In addition, ensure the door is closed all the time and that seals are in place. Place the refrigerator or freezer in a spot that allows free air circulation around the fridge; especially at the back where there are cooling pipes.

Manual defrost freezer models use less energy and are therefore more efficient than the automatic defrost models. Another important factor is the design of the freezer. An upright freezer with shelves is easier to organize. However, the chest freezer may be more energy efficient since there is less cold air escaping from the door which opens from the top.

These are usually 40 percent more efficient than the standard purifiers. Other factors to consider include the room size and placement. Select a model adequate for the room; otherwise, an oversized air purifier or cleaner will end up consuming more power unnecessarily.

Energy star certified dishwashers use at least 12 percent less energy and 15 percent less water than the conventional models. However, this may vary depending on the model and other factors.

These dishwashers utilize more efficient technologies that reduce both the energy consumption and water usage. For example, the design uses soil sensors that check the amount of dirt on the dishes.  An optimized cleaning cycle reduces the minimum amount of energy and water. In addition, there are more efficient water jets and a dish rack design that ensures efficient use of water and energy.

Energy Star dehumidifiers

Certified dehumidifiers use 15 percent less energy. They utilize more efficient compressors, refrigeration coils, and fans.

Washing machines

Energy star certified washing machines are usually 25 percent more energy efficient than their equivalent standard models. In addition, they use 40 percent less water. This results in the consumer saving water, as well as energy for both the washing machine and the water pump.

Clothes dryers

Certified dryers use at least 20 percent less energy than the standard models. The equipment utilizes more efficient technologies such as heat pumps. Moisture sensors automatically stop the drying cycle once the clothes are dry. This sensor-based drying machine is more efficient compared to thermostat or timed drying, which continues to consume energy even after clothes are dry.

Televisions qualify for energy star certification when they become at least 20 percent more efficient. Some models can reach up to 40% better efficiency than traditional models, while the set-top boxes can achieve up to 45 %. However, the amount of power used depends on the size of the TV screen, display technology, and resolution.

The home theater systems that are energy star certified are 60 percent more efficient. Certified battery chargers for small household appliances such as power tools, electric shavers, and cordless gadgets use 30 percent less energy.

Programmable logic controllers provide automatic control of processes so that very little human intervention is required. Yet, this results in a well-coordinated, repetitive process.

These systems automatically start and shut down critical equipment in large and complex manufacturing processes. When in operation, programmable logic controllers ensure that all conditions are met before starting up a certain machine or process. In addition, the PLC continues monitoring the entire system using a variety of sensors.

Consequently, this ensures that everything runs as programmed. The PLC will trip if it detects a malfunction or abnormality in any of the monitored parameters.

The operating environment, size of the processes, ease of access by operators and maintenance personnel influence the choice of PLC.

A harsh environment with dust or small particles will require a PLC system with an appropriately IP rated enclosure. This prevents ingress of foreign particles into the system. The available space and layout also influence the choice. Therefore, most users require easy access for reprogramming, maintenance, or troubleshooting.

The simplest form of a PLC, all the basic components of a PLC include the I/O points, CPU, and software program. It is typically housed in a single enclosure. These PLCs are attached directly to the equipment being controlled.

Modular PLCs consists of several components on a common bus within a base unit to allow extending of the input and output. These units work on an expandable base unit. Therefore, it provides all the basic components of a PLC, i.e., a power supply, I/O points, memory and the CPU, and slots for additional cards.  These modules, which may be from the same or different manufacturers, are plugged together into a base unit.

This follows the same modular concept, but each of the modules plugs into a rack. The add-on modules are contained in racks which are then linked together through a network of connections. Since the rack mounting PLC is highly scalable, it allows very large systems to be assembled.

In energy management, the PLC monitors and controls equipment such as boiler systems. It helps the organization increase energy efficiency and safety. PLCs are also used in numerous everyday activities. They are found in factories, homes, commercial buildings, airports, unmanned car parks, and more.

Finally, some practical applications include:

just 15 years ago. I wonder if any of the attendees at COMDEX thought to themselves “One day, I can cook my steak with the help of a tiny glowing tool that changes colors when my meat is cooked to perfection.” Probably not. Thankfully Sharper Image did, so now you can cook your steak and monitor it from your smart phone.

Illumination from Varaluz Lighting is not only good for you; the company’s creative and artistic compositions are eco-friendly, too!

Contemporary designer lights, over head lighting and accessories from Varaluz are composed of at least 70 % recycled or reclaimed steel and decorative glass compositions are crafted from 100% recycled materials. The “eco-luz” label indicates Varaluz designs are committed to preserving a healthy planet, while providing ingenious artistry for the home.

At Varaluz, company designers believe lighting – from modern lights, to green lighting to contemporary lighting – should not only be interesting, but sustainable. From outdoor wall lighting and mirrors to chandeliers and table lamps, Varaluz Lighting features an eclectic mix of elements uniquely fashioned into highly functional works of art.

For up-scaled modern glamour or edgy transitional sophistication, Varaluz delivers contemporary designer lights and over head lighting designs to elevate your style with eye-popping and imaginative innovation.

Have more fun with home illumination and enjoy the latest marvels from Varaluz Lighting…

Check out the latest lighting compositions from Varaluz at 1800lighting.com and all Capitol Lighting showrooms.