This paper presents the construcrion, newly developed design technologies and performance characteristics of a compact horizontal scroll-type compressor for room air conditione~:s. The authors were able lo develop a compacl variable speed horizontal scroll-type compressor with a cooling capacity of I. 8 kW, which necessitated the development of new mechanisms, namely, an alCial compliance mecha...

Major noise sources of a home air conditioner are fan and compressor. Fan generates air flow noise main& and compressor is the main source of the vibration induced noise. In this study, finite element analysis, a method for design of experiment and a topology optimization method were used to find optimum shape of rubber mount, copper pipe and compressor base plate of a home air conditioner. For...

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...

This paper deals with generalized approach to the reciprocating piston compressor driven by oscillating electrical motor and possibilities of development of new structures of the device. The current term linear compressor, ipso facto, restricts the considered devices only with a linear motion of the piston. Therefore the more general term oscillating motor-compressors is used in the paper, in w...

The purpose of this paper is to introduce the development of a unique compressor capacity modulation concept which utilizes reexpansion volume as a means of capacity reduction in hermetic air conditioning and refrigeration system. While there are various methods of compressor capacity modulation in use, each particular method is limited in its application or appeal for different reasons such as...

An unsteady nonlinear and extended version of the Moore-Greitzer model is developed to facilitate the synthesis of a quasilinear stall vibration controller. The controller is synthesised in two steps. The first step defines the equilibrium point and ensures that the desired equilibrium point is stable. In the second step, the margin of stability at the equilibrium point is tuned or increased by...

Machinery today must have ever-increasing performance capabilities, which also means greater compression system vibration risks. A thorough knowledge of dampener pulsation force phenomena and related best practices is essential to significantly reducing system vibrations. While loads acting on the foundation are defined early in the process to allow for proper design, “cylinder gas loads” depen...

This paper outlines the typical problems seen in reciprocating compressors and shows that the existing type of monitoring systems, consisting of vibration level, rod drop, rod runout, and valve cap temperatures, often misses many of them. The advanced compressor monitoring system, which uses dynamic compressor cylinder pressure, directly targets these areas. This system not only provides the in...

Rotordynamic instability is present in most or all automotive turbochargers. High subsynchronous amplitudes can cause a variety of problems in areas such as mechanical failures, emissions regulations and rotor design. Self-excited vibrations from sources of damping can lock in at lateral natural frequencies causing dangerously high vibration levels. The resulting highamplitude conical and bendi...

Hermetic reciprocating compressor with elliptical shell radiates noise whose frequency spectrum has a peak level at about 200 Hz and about 300 Hz. The 200 Hz and 300 Hz noise is mainly radiated from the top and the side of the compressor shell, respectively. For clarifying the noise radiation mechanism, experimental and theoretical analyses were performed. A noise source simulation test was set...