In order to reach the EU: s 20-20-20 primary energy savings target, energy efficiency needs to increase. Previous research on energy use and energy efficiency has focused mainly on the diffusion of energy efficient technologies. The discrepancy between optimal and actual implementation of energy efficient technologies has been illustrated in numerous articles and is often referred to as the ene...

Heat and air conditioning losses in buildings and factories lead to a large amount of wasted energy. The Action Plan for Energy Efficiency of the Commission of the European Communities (2008) estimates that the largest cost-effective energy savings potential lies in residential (≈ 27%) and commercial (≈ 30%) buildings. Imagine a technology that creates a precise digital 3D model of heat distrib...

This paper investigates energy savings on mobile systems in privacy-preserving computation offloading. Offloading computation-intensive programs to servers can save energy but data must be protected for privacy concerns. The protection schemes must guarantee operations performed on the protected data remain meaningful and the results are still acceptable. The protection cannot require excessive...

Rebound effects occur when improvements in energy efficiency stimulate the direct and indirect demand for energy in production and consumption. This phenomenon may act to partially or wholly erode potential energy savings. We extend on previous sensitivity analyses of rebound effects by examining whether the structure of the production function itself has an impact on the presence and magnitude...

We analyze different optimization strategies for real-time energy management in building systems. We have found that exploiting building-wide multivariable interactions between CO2, humidity, pressure, occupancy, and temperature leads to significant reductions of energy intensity. Our analysis indicates that it is possible to obtain energy savings of more than 50% compared with traditional cont...

Energy consumption is abstract and invisible for consumers within the household. Through the European rollout of smart meters, an attempt to develop information and communication technologies to reduce domestic energy consumption has been launched. There is the expectation that usage of these technologies will result in energy and cost savings. This paper describes an approach for integrating p...

In this paper, a mathematical model is formulated to quantify the social impact an individual has on his/her community when he/she performs any energy efficiency project and transmits that information to his/her neighbours. This model is called the expected power savings model; it combines direct and indirect expected power savings of the energy efficiency project for each individual within the...

With the accelerating process of urbanization, developing countries are facing growing pressure to pursue energy savings and emission reductions, especially in urban passenger transport. In this paper, we built a Beijing urban passenger transport carbon model, including an economy subsystem, population subsystem, transport subsystem, and energy consumption and CO2 emissions subsystem using Syst...

Energy and power consumption are major limitations to continued scaling of computing systems. Inexactness where the quality of the solution can be traded for energy savings has been proposed as a counterintuitive approach to overcoming those limitation. However, in the past, inexactness has been necessitated the need for highly customized or specialized hardware. In order to move away from cust...

The UK faces a significant retrofit challenge, especially with its housing stock of old, hard-to-treat solid walled dwellings. In this work, we investigate the delivery of heated thermal comfort with a lower energy demand through four types of energy efficiency interventions: passive system, conversion device, method of service control, and level of service demanded. These are compared for thre...