The current work investigates the exergy analysis of a new system to generate power, heat, and refrigeration. In the proposed system, the heat loss of a gas turbine (GT) is first recovered by a Heat Recovery Steam Generator (HRSD), then by an Organic Rankine Cycle (ORC) to generate warm water and additional power, respectively. In the ORC, reheating is used to increase the output power, the req...

The computing requirements of battery-powered systems are increasing faster than battery capacity. Because large, heavy batteries are unacceptable for handheld computers, low-power design and power management are crucial for these systems. One of the main obstacles limiting these techniques is the lack of a detailed analysis of system power under representative workloads. With the understanding...

The information technology (IT) world has changed fundamentally and drastically from running software applications on a single computer with a single CPU to now running software as services in distributed and parallel computing environment. Power system operation has been also shifted from being solely based on off-line planning study to more and more real-time market-driven. Facing these chall...

Low power consumption has been established as the third main design target for digital systems together with performance and area. Consequently, accurate estimators of the power consumption at the system as well as the lower levels of abstraction are necessary. A large number of embedded computing applications are power or energy critical. Early work on processor analysis had focused on perform...

this paper describes a study that starts with an analysis of typical energy demand profiles in a hospital setting followed by a case study of a combined cooling, heating, and power (cchp) generation system.cchp is an autonomous system that combines the generation of electrical, heating, and cooling energy.the driving units are two high-efficiency gas engines that produce electrical and heat ene...

This paper develops a price structure for providing reactive power service and control based on optimal power flow (OPF) approach. The cost of reactive power support service is determined based on capability and contributions to the improvement of system performance such as security, reliability and economics, by computing sensitivity of objective function with respect to reactive power support...