The temperature of an electronics device rises fairly linearly with increasing device heat flux. This relationship is especially problematic for defense electronics, where heat dissipation is projected to exceed 1000W/cm in the near future. This paper study explored the benefit of cooling the electronics device using indirect refrigeration cooling system .In this system the heat sink in a prima...

The relative low COP of transcritical CO2 systems caused by the throttle valve limited the further development. The replacement of a throttle valve with a turboexpander, an ejector or a vortex tube is leading to the way for improving the COP of a transcritical CO2 system. In this paper, a transcritical carbon dioxide refrigeration cycle with different expansion devices was analyzed theoreticall...

VapCyc is a vapor compression refrigeration simulation tool which features charge management and component inter-changeability. In addition to the four basic cycle components, additional components, such as pipes, bypass valves and various auxiliary heat exchangers can be added to the system at run-time, rather than design time, making the simulation very user-friendly. The simulation is achiev...

Refrigeration effects can be obtained from elastomers classified as “ideal rubber” by operating over a cycle similar to that of the Carnot cycle. The interesting properties of ideal rubber have long been recognized, with most investigations of potential thermodynamic cycles devoted to power cycles. This paper focuses on the development of refrigeration cycles constructed from ideal rubber refri...

The coefficient of performance (COP) for a gas refrigeration cycle was estimated using Matlab/Simulink and fuzzy logic. A model the developed, output compared to theoretical data. Additionally, logic used estimate COP arbitrary low- high-pressure levels. Simulation results were develop multi-input-multi-output (MIMO) Takagi-Sugeno-Kang (TSK)-based model. Both MIMO found be very well correlated ...

In this paper, a new combined system is proposed for recovering thermal energy at medium temperature using cascade organic Rankine cycle to feed refrigeration cycle. Energy and exergy analysis applied the determine its performance different working fluids under same operating conditions taking into account effect of some parameters selection on performance. The pair fluid
 (Toluene/R245fa)...