Title of Document Application of Plate Heat Exchanger for Low Temperature Lift Heat Pump Systems Song Li, Master of Science, 2012 Advisor Professor Reinhard Radermacher, Department of Mechanical Engineering In this thesis I investigated the energy saving potential of a low temperature lift heat pump (LTLHP) such as water source heat pump (WSHP), and studied the utilization of a plate heat excha...

Subcooled flow boiling was experimentally investigated in a horizontal annulus with temperature-controlled surface and transparent outer pipe facilitating visualization. Boiling occurs on copper tube diameter of 12 mm an 2 gap. Refrigerant R245fa is used as working fluid. The focus this study to explore the effect heat flux variation patterns at approximately constant inlet conditions fluid (fi...

A brief review of recent low gravity boiling research by investigators based in the United States is performed. Topics covered include bubble dynamics, nucleate pool boiling and CHF, transition boiling, boiling of mixtures, electric ˆeld eŠects, acoustic ˆeld eŠects, and ‰ow boiling. Planned research activities and recommendations for future

RNA is a polyribonucleic acid belonging to a special class of anionic polymers, holding a unique property of self-assembly that is controllable in the construction of structures with defined size, shape, and stoichiometry. We report here the use of RNA as polymers to fabricate boiling-resistant triangular nanoscaffolds, which were used to construct hexagons and patterned hexagonal arrays. The R...

In recent years, as a rule, improvement of the reliability of liquid propellant rockets becomes an international technical problem for built-up of safe space transport systems. The high performance, liquid propellant rocket engines require high-pressured turbopumps to deliver extremely low temperature propellants of liquid oxygen (LO2, boiling point 90 K) and liquid hydrogen (LH2, boiling point...

We investigate the liquid-gas phase transition of dense matter in supernova explosion by the relativistic mean field approach and fragment based statistical model. The boiling temperature is found to be high (Tboil ≥ 0.7 MeV for ρB ≥ 10−7 fm−3), and adiabatic paths are shown to go across the boundary of coexisting region even with high entropy. This suggests that materials experienced phase tra...

The depressurization of a vessel containing saturated or subcooled liquid may occur in a variety of industrial processes and often poses a potentially hazardous situation. A numerical model was developed for estimating the thermodynamic and the dynamic state of the boiling liquid during a boiling liquid vapor explosion (BLEVE) event. The model allows calculation of bubble nucleation and growth ...

A droplet of water on a heated surface can levitate over a film of gas produced by its own evaporation in the Leidenfrost effect. When the surface is prepared with ratchet-like saw-teeth topography, these droplets can self-propel and can even climb uphill. However, the extent to which the droplets can be controlled is limited by the physics of the Leidenfrost effect. Here, we show that transiti...

In the present scenario, usage of pesticides are inevitable to meet the demands of growing population and to secure the food grain production, there is need for regular screening of milk and milk products for pesticide residues which is being felt in the trade and also at the consumers level. The present work was undertaken to study the effect of heat processing on degradation of various Organo...