This study develops thermofluidic pump technology that is powered by heat, rather than by electrical or mechanical power. The objective is to improve the performance of heat-recovery by Organic Rankine Cycles, by using a recently-proposed thermofluidic pump. The thermofluidic pump promises low-cost, high-reliability, and, since it does not consume any of the power produced by the expander, impr...

Title of Dissertation: INVESTIGATION OF VAPOR INJECTION HEAT PUMP SYSTEM WITH A FLASH TANK UTILIZING R410A AND LOW-GWP REFRIGERANT R32 Xing Xu, Doctor of Philosophy, 2012 Dissertation Directed by: Professor Reinhard Radermacher Department of Mechanical Engineering Vapor injection technique has proven to be effective in improving heat pump system performance, especially for cooling application a...

Sewage is a kind of ideal low-temperature heat sources. Sewage heat source pump system uses heat energy in sewage, and it is a method of utilizing sewage resources. In this article we analyze sewage’s characteristics and sewage source heat pump system; introduce its practical applications in sewage treatment plants in China, analyze its technical and economic characteristics, and discuss its ap...

Reductions in fossil fuel use and increases in system efficiency are required to make space heating more environmentally benign. Ground loop heat pumps offer an alternative heating solution that is more environmentally benign than conventional methods. Past studies of these heat pumps have usually focused on basic system arrangements, but new advanced systems are being developed. Here, energy a...

The possibility of building a high voltage electrostatic air pump for cooling of microelectronics is investigated. Existing cooling technology no longer provides adequate heat dissipation due to excessive heat generation caused by the growing component density on electronic devices. Heat sink fins are packed more closely to increase the heat exchange surface area, resulting in narrower channels...

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 ...

in this study. optimum allocation of heat transfer inventory for heat exchangers in a refrigeration system with specified power input or cooling capacity. and for a heat pump with specified heating capacity is investigated. the ratio of hot- to cold-end conductance unit cost ratio. g.was considered in the analysis as an additional variable of considerable importance to the designer summarized e...