Variable-speed drives (VSDs) control the speed of machinery, pumps, mixers, fans and compressors to match the needs of the process. In many applications VSDs save so much energy that their economic payback time is only a matter of months. A new approach to the assessment of environmental impacts shows that the environmental payback time of VSDs can be even shorter, in many cases as little as on...

A number of studies have estimated how much energy conservation is achieved by providing households with real-time information on energy use via in-home displays. However, none of these studies tell us why real-time information changes energy-use behavior. We explore the causal mechanisms through which real-time information affects energy consumption by conducting a randomized-control trial wit...

ــ ـ ـ The wireless sensor networks suffer from the problem of energy consumption, so it has been used several protocols to avoid this problem, the best of these protocols is a LEACH protocol which works to reduce the energy consumption of the network. On the other hand, LEACH protocol suffers from the problems of accelerated the dead nodes as well as the short duration of the network lifetime....

This paper presents our reflections on the issue of behavioral change according to energy conservation constraints and on the status of sustainability in the design of ambient interactive systems at home. We point out how ergonomics contributes to the study of human factors underlying energy consumption. Relating to situated cognition and human computer interaction, our approach relies both on ...

Persuasive systems make it possible to change people’s behaviour. These persuasive systems build into mobile applications can use the technology available in mobile devices (sensors, always connected and always nearby). This paper investigates how a mobile application can influences the domestic energy consumption. The study consists of two parts: an interview and a literature study. In the int...

Energy problem is becoming one of the toughest issues nowadays. In order to meet the increased demands regarding energy awareness, we have been developing a new way of representing and interacting with energy in electric products, specifically home appliances. The Ubi-PowerMeter is such a paradigm, which consists of hardware devices including smart meters and residential gateway, wireless commu...

As some nodes in the wireless network are supplied by the battery, energy is critical to data transmission, to optimize the energy consumption of the wireless network and prolong the network lifetime, the optimal energy routing protocol algorithm is proposed. The algorithm of this text uses threshold energy and average residuary energy to balance the energy consumption, uses network coding to r...

Energy efficiency in office buildings has been the center of attention for many researches. This special attention is due to highly energy consumption in this building type. Refinement of facade and building’s envelop is a good approach to reduce buildings energy requirements. Double skin facade concepts are commonly used to achieve that object. Although the concept is not new, there is a growi...