A Graphical Method for Combined Heat Pump and Indirect Heat Recovery Integration

Upper Heat S Ink Heat Pump Lower Heat Sink

The thermal diffusion factors observed for these systems vary considerably with concentration, and frequently show a change in sign at some concentration. New data on ethanol-toluene mixtures show that the sign and magnitude of the separation of the components in a thermal gradient are also strongly dependent on the mean temperature of the system. These observations, together with earlier ones ...

Advanced Process Integration for Low Grade Heat Recovery

Control Method Of Circulating Refrigerant Amount For Heat Pump System

A heat pump system requires proper refrigerant charge amount. Once refrigerant is charged into a heat pump system, its charge amount is fixed. For this reason, prediction of optimal refrigerant charge amount is very important in order to yield best performance. Too low charge amount degrades capacity of heat pump. On the other hand, excessive charge amount decreases coefficient of performance (...

Semester Project Heat Pump Integration in Industrial Processes - II

This semester project follows a previous project at LENI-EPFL [10] and aims at nding the best optimization approach in terms of Heat Pump integration in industrial processes. The MultiObjectiveOptimization method chosen seeks the minimum of both operating and investment costs related to HP purchase. Di erent optimization approaches are tested in order to nd the best solution in terms of feasibi...

Heat Pump Systems for Enhancement of Heat Rejection from Spacecraft

Temperature boosting of waste heat from spacecraft by means of heat pumps makes it possible, under some conditions, to achieve considerable savings in radiator area and mass. This study considers several possibilities for employing workactuated and heat-actuated heat pumps (WAHP and HAHP, respectively) for this purpose. In the former case, the spacecraft power source is required to generate ext...