This paper presents the effect of centrifugal load in functionally graded (FG) hollow sphere subjected to uniform magnetic field. Analytical solution for stresses and perturbation of the magnetic field vector are determined using the direct method and the power series method. The material stiffness, the magnetic permeability and the density vary continuously across the thickness direction accor...

The scroll compressor incorporates new construction concepts and is quite different from other types of compressor. This unique and simple compression mechanism has a number of advantages such as small size, light weight, high efficiency, long life, and quiet operation. The compliant mechanism is one of the key ways to improve the performance and reliability of scroll compressors. The concept o...

The scroll compressor incorporates new construction concepts and is quite different from other types of compressor. This unique and simple compression mechanism has a number of advantages such as small size, light weight, high efficiency, long life, and quiet operation. The compliant mechanism is one of the key ways to improve the performance and reliability of scroll compressors. The concept o...

Industry in the developed world has come to depend heavily on HFC refrigerants, all blends except for R134a. This dependency will increase when the last of the HCFCs, R22, becomes unavailable in the near future. Furthermore, the pressure for increased efficiency combined with reduced running costs and environmental impact is relentless, particularly since the Kyoto Protocol which has had the ef...

The present paper is a numerical and experimental comparative study of hermetic and semi-hermetic reciprocating compressors working with carbon dioxide as fluid refrigerant against the conventional R134a hermetic compressors. When cooling conditions for one-stage compressor type (i.e., evaporation temperatures between 7.2oC and –10oC) have been considered, the numerical and experimental results...

The article investigates the strength of propeller blades made a multilayer composite material, subjected to centrifugal and gas loads with various combinations fiberglass carbon fiber orientation material base. finite element method is used as research method. A blade in turbines jet engines compressors, materials, considered naturally twisted rod, provided that hypothesis flat sections across...

Although inlet bent pipes are usually adopted due to limited installation space, the influences of different bend on flow characteristics and performance centrifugal compressors still unclear. The numerical simulation a compressor is established validated by experimental results with case straight pipe. Then, internal 90-degree pipe (p90) Z-shaped (pz) simulated discussed. show that adoption tw...

In this paper, a novel implementation of 8x8 Multiplier using 4-2 Compressors is presented; which produces quick results, especially for use in Digital Signal Processors and in Microprocessors. This multiplier uses a new partial-product reduction format which consecutively reduces the maximum output delay. The new design of multiplier requires less number of MOSFET’s compared to Wallace Tree Mu...

In this paper we present a bit-oriented architecture for the digital Finite Impulse Response (FIR) filter with adaptive coefficients. Instead of using multipliers, the FIR operation is regarded as the summation of a larger number of operands. Our architecture utilizes two new word-level operand compressors, namely six-to-triple and six-to-double compressors. Both of these two compressors, multi...

In Japan, the refrigerant used in room air-conditioners has been changed from HCFC-22 (R-22) to R-410A, a blend of HFC-32 and HFC-125 (50/50 vt%), in order to protect the ozone layer. Generally, the miscibility between the refrigerant and refrigeration oil must be assured, because the oil needs to return to the compressor from the refrigeration cycle and lubricate the sliding parts. Alternative...