Performance Analysis of a Twin Rotary Compressor
For a twin rotary compressor, a computer simulation program has been developed. With R22, predicted cooling capacity, compressor input and EER were found to be in good agreement with experimental results. Calculated P-V diagram was also compared well to that of measurement. With the simulation program, parametric study has been performed to investigate effects of cylinder dimensions on R410A twin rotary compressor performance. Over the ranges of cylinder dimensions studied, some variations were found for volumetric, adiabatic and mechanical efficiencies, but overall compressor performance did not change much. Discharge port configuration was found to have large effect on adiabatic efficiency, but not much on volumetric efficiency.
Study of Twin Rotary Compressor for Air-Conditioner with Inverter System
The cootinuiog cons\Jlller pursuit of greater comfort in_ the . eve~Y. life stresses the need for air conditioners that offer better-qual~ty a~r Coodlt~onlDg with less energy bills and less noise. The essential performance of air conditioners depends on the characteristics of the compressor, the heart of any air conditioner. Particularly, inverter-driven compressors are required to provide a broad variable workiog rpm range and offer high efficiency, low noise, and low vibration throughout such range. Toshiba has developed a high-performance twin rotary compressor haviog two compression chambers. A phase difference of 180° in their IQUtual compression timing improves the dynamic balanciog and torque ripple characteristics of the compressor to provide silent, high-efficiency operation over a broad rpm range, frOID low to high. IN'I'ROIJIJGriON General family air conditioners (hereafter simply called air conditioners) , amoog which the heater/cooler heat pwPp type is dominant, have come into such widespread use in the cons\Jlllers'everyday lives that one air conditioner can now be found in alJDOst every r0010 in a bouse. ·since Toshiba pioneered in the marketing of an inverter air conditioner in 1981 for the first time in the world. inverter air conditioners have led the subsequent evolution of general family air conditioners in pace with the growing needs for better air condi tioniog comfort and energy conservation. The essential performance of air conditioners is determined by the characteristics of the compressor, the heart of any air conditioner. Two major ~:equireJUents that face inverter-driven compressor are: a broad variable workiog rpm range, and high efficiency, low noise, and low vibration throughout such range. Previous inverter air conditioners used a single-cylinder single rotary compressor operating on a single-rotation, siogle-compression principle. This compressor structure, however, was short of assuring the inverter air conditioner of full performance, because it was liable to vibration. noise, and shaft whirliog associated with rotational illlbalances. limiting the minimuiD working rp11, which relates closely to energy conservation and comfort, and the maximum working rpm. which relates closely to heating/cooling startup speeds. Despite the subsequent advent of various analysis techniques and continuing pursuit of optimization designs to improve compressor characteristics, a variable working rpm range, and high-efficiency, low-noise, and low-vibration requirements have become increasingly more incompatible tasks. To fill the need for added performance for inverter-driven compressors. Toshiba has developed a twin rotary compressor for use in general family inverter air coodi tioners. which is furnished with two compression chambers to produce a phase diff~rence of 180° in their JOUtual compression timing. In the product design scene. the bending deformation behavior and bearing load characteristics of the rotor shaft during whirling were dynamically analyzed by directly calculating the bearing force as part of netfly developed axial behavior analysis procedures with the Reynolds equations so as to improve both reliability and performance. Structural and efficiency analyses are also reflected in the compressor design to employ a new frame clamping method and a dual-suction structure for added performance.
Facilitating Spiritual Care in the Rehabilitation Setting
&NA; Nurses, who traditionally have espoused a holistic approach to patient care, are in a unique position to attend to clients’ spiritual needs. The assessment, planning, and provision of spiritual care is particularly important in the rehabilitation setting. Research attention needs to be directed at gaps in the current state of knowledge and practice of spiritual care to meet the needs of rehabilitation clients.