This paper presents the evaluation of heat generation behavior and related thermal measurement analysis of packaged high-power AlGaN/GaN high electron mobility transistors (HEMTs) cascaded with low-voltage MOSFET and SiC SBD. Since thermal management is extremely important for high power packaging, a hybrid integration of the GaN HEMTs onto a DBC substrate and metal case is proposed. We investi...

in a steam power plant, the temperature of the cooling water leaving the condenser for recyclingshould decrease. this is achieved in a cooling tower. the heller cooling tower does not require waterfor operation, thus, it is a suitable system for use in thermal power plants throughout iran. wind is anenvironmental factor that unfavorably affects the performance of a cooling tower. previous studi...

It is possible to harvest energy from Earth's thermal infrared emission into outer space. We calculate the thermodynamic limit for the amount of power available, and as a case study, we plot how this limit varies daily and seasonally in a location in Oklahoma. We discuss two possible ways to make such an emissive energy harvester (EEH): A thermal EEH (analogous to solar thermal power generation...

Solid-state lasers are typically limited by adverse thermal effects within the gain medium. In this Letter we describe a new method for dramatically reducing thermal effects in an end-pumped solid-state laser by incorporating a rotating intracavity periscope in the resonator to spatially separate the lasing and thermal processes. In contrast with previous examples of moving solid-state lasers, ...

We present an experimental demonstration of adaptive control of modal properties of optical beams. The control is achieved via heat-induced photothermal actuation of transmissive optical elements. We apply the heat using four electrical heaters in thermal contact with the element. The system is capable of controlling both symmetrical and astigmatic aberrations providing a powerful means for in ...

of “Power Mapping of Computing Devices: Fundamentals and Applications” by Abdullah Nazma Nowroz, Ph.D., Brown University, May 2014 Power consumption limits the maximum achievable performance of modern processors. Accurate power modeling is an essential step in both mobile and high-end processors. Large-scale transistor-level power modeling is computationally very challenging. As a result high-l...