The performance of air conditioner and the reliability of compressor could be reduced, if the refrigerant gas is discharged from compressor with excessive lubricating oil. Thus, the study of the reduction of the oil circulation rate in the compressor is required to resolve the problem. In this paper, five feasible approaches to decrease the oil circulation rate were confirmed by experiment. the...

At the Kernfysisch Vensneller Institiutr (KVI) in Groningen, NL, a new facility (TRIµP) is under development. It aims for producing, slowing down, and trapping of radioactive isotopes in order to perform accurate measurements on fundamental symmetries and interactions. A production target station and a dual magnetic separator installed and commissioned. We will slow down the isotopes of interes...

A helicopter is not possessed of an ability to fly fast compared with fixed-wing counterparts. This is a result of considerations with the main rotor. The main rotor moves in a direction very close to its plane of rotation which naturally divides it into two halves which operate under different aerodynamic conditions. One side (called the advancing side) has the rotation and translation velocit...

Calcined coke is a competitive material for making carbon anodes for smelting of alumina to aluminum. Calcining is an energy intensive industry and a significant amount of heat is exhausted in the calcining process. Efficiently managing this energy resource is tied to the profit margin and survivability of a calcining plant. To help improve the energy efficiency and reduce natural gas consumpti...

Dipl.-Ing. (FH) Francesco Zitarosa is Director of the Global Crankcase Ventilation Application Technology Department at the Reinz-DichtungsGmbH in Neu-Ulm (Germany). Philipp Zedelmair, B. Eng. works on Oil Separation Development at the Plastics Systems Division of the Reinz-DichtungsGmbH in Neu-Ulm (Germany). Dipl.-Ing. (FH) Christoph Erdmann is Development Director at the Plastics Systems Divi...

As the offshore market faces deepwater production challenges, the oil and gas industry is investing in new technologies to bring down the costs in the subsea fields exploitation. A breakthrough technology solution is the development of a subsea centrifugal compressor module installed on the seabed, transporting the wellstream to a central platform or directly to shore. The typical application o...

Jay Kim Structural Dynamics Research Laboratory University of Cincinnati Cincinnati, OH 45221-0072 Since the suction accumulator is one of components with large surface area in rolling piston type rotary compressors, its contribution to the total radiated noise may be substantial. In this study, possible noise sources of the accumulator are discussed. The noise radiated from accumulators are pr...

Electrochemical impedance spectroscopy (EIS) is a suitable and powerful diagnostic testing method for fuel cells (FCs) since it is non-destructive and provides useful information about FC performance and its components. In this study, for the first time, a 500W cascade type 4 cells stack with integrated humidifier, water separator and internal manifolds was designed, fabricated and tested. The ...

A new ion guide has been modeled and tested for the production of a low energy (≈ 40 kV) ion beam of daughter products of alpha-emitting isotopes. The guide is designed to evacuate daughter recoils originating from the α-decay of a U source. The source is electroplated onto stainless steel strips and mounted along the inner walls of an ion guide chamber. A combination of electric fields and hel...