The effects of compressor speed variation on the heat transfer inside a speed controlled compressor were investigated in this study. Based on the lumped capacitance ntethod, the temperatures of the compressor components, the oil, and the refrigerant gas within the shell were modeled and simulated on a relative scale. A diffenmt heat transfer coefficient correlation was developed to evaluate the...

The need for more flexible operation of gas-fired power plants has led manufacturers to exploit possibilities retrofit existing systems and increase turndown capabilities, lowering the minimum environmental load (MEL) - lowest output at which unit can operate still meet emissions limits. A possible measure compressor enable a reduced MEL is extract significant mass flow rates through bleed port...

A Burrows-Wheeler Compressor breaks input into blocks, quickly makes each more compressible, and compresses the modified block with a simple arithmetic or Huffman compressor. We propose an error-resilient Inverse Burrows-Wheeler Compressor. It uses a small amount of overhead alongside output from an ordinary BWT and MTF. It is also size-competitive with BZIP, a popular Burrows-Wheeler compressor.

A new compressor product is introduced which fulfills the market need for a low cost, high efficiency, durable air conditioning and heat pump compressor for the 1.5 to 2.0 ton capacity range. ·A review of compressor technologies has indicated the optimum compressor for this application would incorporate the durability and versatility of a piston compressor while employing the cost and noise adv...

This paper presents the theoretical and experimental investigations on the transient stress of the suspension spring in a reciprocating hermetic refrigeration compressor. The torques acting to the compressor body of a multi-cylinder compressor and the transient vibration of the compressor body are analyzed over a wide range of start and stop operations. The dynamic stresses of the suspension sp...

The given paper is aimed at constructing the general circuit of heat processes in a semihermetic reciprocating refrigerant compressor as a basis of application of new ecology-friendly refrigerants as well as optimizing design parameters of compressor. While performing this work the following problems were solved: 1. Experimental research of heat processes in a semihermetic refrigerant reciproca...

A stage-by-stage wet-compression theory and algorithm have been developed for overspray and interstage fogging in the compressor. This theory and algorithm are used to calculate the performance of an 8-stage compressor under both dry and wet compressions. A 2D compressor airfoil geometry and stage setting at the mean radius are employed. Six different cases with and without overspray have been ...

Shigeru MURAMATSU, Chief Engineer Masafumi FUKUSHIMA, Chief Engineer Hiroshi MATSUNAGA, Engineer, Compressor Division, (PANASONIC), Noji-cho, This study presents experimental results on the rotary crankshaft behavior, the cylinder pressure and mechanical vibrations o£ a rolling-piston rotary compressor after shut down of the motor. It is shown as a conclusion that the most importantfactor chara...

III. Preliminary results 5 IIIa. Three-mirror quasi-optical passive compressor 6 IIIb. Optimization of the three-mirror passive compressor parameters 7 IIIc. Prototype of a passive compressor with a three-mirror resonator 10 IIId. Four-mirror quasi-optical passive compressor 14 IIIe. Prototype of a passive compressor with a four mirror resonator 15 IIIf. Diffraction gratings as active elements ...