An experimental study of the operating characteristics of an asynchronous motor with pulse supply

2016 ◽  
Vol 87 (6) ◽  
pp. 333-339 ◽  
Author(s):  
A. V. Shestakov ◽  
V. V. Zhelnin ◽  
R. N. Ismiev
Keyword(s):  
Experimental Study ◽  
Asynchronous Motor ◽  
Operating Characteristics ◽  
Pulse Supply

scholarly journals Pivoted-Pad Journal Gas Bearing Performance in Exploratory Operation of Brayton Cycle Turbocompressor

1968 ◽  
Vol 90 (4) ◽  
pp. 687-696 ◽  
Author(s):  
R. Y. Wong ◽  
W. L. Stewart ◽  
H. E. Rohlik
Keyword(s):  
Experimental Study ◽  
Journal Bearing ◽  
Inert Gas ◽  
Brayton Cycle ◽  
Ambient Conditions ◽  
Operating Characteristics ◽  
The Third ◽  
Loading Device ◽  
Bearing Design ◽  
Gas Bearing

This paper describes findings obtained to date in the area of journal gas bearings from an experimental study of a Brayton cycle turbocompressor designed for the requirements of a two-shaft 10-kw space power system. The journal bearing design utilizes three pads pivoted on conforming balls and sockets. Two of the pivots are rigidly mounted to the frame, and the third pivot is mounted to the frame through a low-spring-rate diaphragm. This paper describes the salient package and bearing design features and then presents the principal results obtained from testing the package in both a spin calibration rig and operation at design temperature conditions with an inert gas. The results discussed include (a) the successful use of a pneumatic loading device to vary pad load during operation, (b) the operating characteristics of the bearings as obtained over a range of pad loads and ambient conditions, (c) structural and dynamic behavior of the bearing-support system during design temperature operation and (d) a discussion of the wear characteristics of the conforming ball-and-socket pivot as obtained from the tests made to date.

Experimental study of operating characteristics of compression/absorption high-temperature hybrid heat pump using waste heat

2013 ◽  
Vol 54 ◽  
pp. 13-19 ◽  
Author(s):  
Jiyoung Kim ◽  
Seong-Ryong Park ◽  
Young-Jin Baik ◽  
Ki-Chang Chang ◽  
Ho-Sang Ra ◽  
...  
Keyword(s):  
Experimental Study ◽  
High Temperature ◽  
Heat Pump ◽  
Waste Heat ◽  
Operating Characteristics ◽  
Hybrid Heat Pump

scholarly journals A new concept of upflow clarification in activated sludge separation

1986 ◽  
Vol 13 (5) ◽  
pp. 517-522
Author(s):  
Arthur B. Sparling ◽  
David L. Woytowich
Keyword(s):  
Experimental Study ◽  
Experimental Investigation ◽  
Activated Sludge ◽  
Key Words ◽  
Laboratory Study ◽  
Removal Mechanism ◽  
Operating Characteristics ◽  
Activated Sludge System ◽  
Gravity Sedimentation ◽  
Settling Characteristics

An experimental investigation was conducted to evaluate a new concept of upflow clarification. A novel sludge removal mechanism that used the entire floor area for the removal of solids was incorporated in an upflow clarifier. The operating characteristics and design features of the continuous flux upflow clarifier (CFLUC) are described in detail. The laboratory study was conducted to determine the effectiveness of the CFLUC clarifier in separating sludges with different settling characteristics. The different sludge types were produced by an activated sludge system treating a synthetic dairy waste at four different food to microorganism (F: M) ratios. At low organic loadings (0.10–0.24 (g COD)(g MLVSS)−1 (d)−1), the CFLUC clarifier removed 70% of the pinpoint floe that remained during quiescent batch settling conditions. At high organic loadings (0.41–0.83 (g COD)(g MLVSS) −1 (d) −1), the CFLUC clarifier was capable of separating filamentous bulking sludges with poor settling characteristics. Based on the results of the experimental study the upflow clarifier effectively separated all sludge types over the range of organic loadings investigated. Key words: CFLUC clarifier, secondary clarification, upflow clarification, sludge blanket, bioflocculation, bulking sludge, gravity sedimentation.

Experimental Study of Tilting-Pad Journal Bearings—Comparison With Theoretical Thermoelastohydrodynamic Results

1992 ◽  
Vol 114 (3) ◽  
pp. 579-587 ◽  
Author(s):  
Michel Fillon ◽  
Jean-Claude Bligoud ◽  
Jean Freˆne
Keyword(s):  
Experimental Study ◽  
Theoretical Model ◽  
Rotational Speed ◽  
Journal Bearing ◽  
Journal Bearings ◽  
Operating Conditions ◽  
Operating Characteristics ◽  
Tilting Pad ◽  
Tilting Pad Journal Bearing ◽  
Tilting Pad Journal Bearings

Operating characteristics of four-shoe tilting-pad journal bearings of 100 mm diameter and 70 mm length are determined on an experimental device. The load, between pad configuration, varies from 0 to 10,000 N and the rotational speed is up to 4000 rpm. Forty thermocouples are used in order to measure bearing element temperatures (babbitt, shaft, housing and oil baths). The influence of operating conditions and preload ratio on bearing performances are studied. Comparison between theoretical and experimental results is presented. The theoretical model is also performed on a large tilting-pad journal bearing which was investigated experimentally by other authors.

Experimental Study of a Self-Pumping Boiling Collector Solar Hot Water System

1989 ◽  
Vol 111 (3) ◽  
pp. 211-218 ◽  
Author(s):  
J. H. Davidson ◽  
H. A. Walker ◽  
G. O. G. Lo¨f
Keyword(s):  
Experimental Study ◽  
Vapor Pressure ◽  
Water System ◽  
Heating System ◽  
Hot Water ◽  
The Self ◽  
Operating Characteristics ◽  
Pumping System ◽  
Fort Collins ◽  
Mechanical Pump

Results of an experimental study of a full-scale passive solar hot water heating system utilizing a boiling collector are presented. The self-pumping system alternates between two modes of operation. During the run cycle, vapor pressure drives the evaporated refrigerant downward from the collector to the condenser. Once a preset quantity of refrigerant is condensed, vapor pressure is again used to force the return of the condensate to the collector during the pump cycle. In order to assess the thermal penalty of self-pumping operation, the system is also operated with a mechanical pump. Daily operating characteristics and seasonal performance are discussed. Performance of the self-pumping system is strongly influenced by the duration of the pump cycle. The average thermal loss attributed to self-pumping during one heating season in Fort Collins, Colo. is approximately nine percent of the solar energy incident on the collector. Refinement of the system design, including individual components, is required to reduce losses and improve performance.

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