Determination of the dynamic characteristics of adhesiveless strain gage pressure transducers

1989 ◽  
Vol 32 (1) ◽  
pp. 52-56 ◽  
Author(s):  
V. I. Pechuk ◽  
V. M. Zakharenko ◽  
V. Yu. Skripchuk ◽  
A. Yu. Shvets
Keyword(s):  
Strain Gage ◽  
Dynamic Characteristics ◽  
Pressure Transducers ◽  
Gage Pressure

scholarly journals Thermal Performance Representation and Testing of Air Solar Collectors

1988 ◽  
Vol 110 (2) ◽  
pp. 74-81 ◽  
Author(s):  
M. A. Bernier ◽  
E. G. Plett
Keyword(s):  
Uncertainty Analysis ◽  
Thermal Performance ◽  
Atmospheric Pressure ◽  
Leakage Rate ◽  
Solar Collectors ◽  
The Third ◽  
Enthalpy Balance ◽  
Gage Pressure ◽  
Storage Type ◽  
Plate Type

The thermal performance of a plate-type air collector was evaluated experimentally. Tests were performed at the two ASHRAE Standard 93-1986 recommended flowrates and at a variety of inlet gage pressures to cover the three possible cases of collector leakage (inward, outward, inward-outward). These tests show that the thermal performance of air collectors depends on flowrate and inlet gage pressure (or the associated leakage rate). If the collector is used at an inlet gage pressure near atmospheric pressure as is often the case in the no-storage type of systems, then it is recommended to test the collector at an inlet gage pressure of zero. For collectors operating at various inlet gage pressures it is suggested to test them at three inlet gage pressures. As for the test flowrate, the present work confirmed the results of other studies and emphasizes the need to test the collectors at the design flowrate. Three methods of thermal performance representation were used and compared: One method bases the efficiency on the inlet flowrate, another on the outlet flowrate, and the third involves an overall enthalpy balance. When plotted in the classic way, that is, η vs. (Ti − Ta)/G the three methods exhibit significant differences, especially for the inward leakage case. An uncertainty analysis on the data obtained for this study indicates that for the inward leakage case, unacceptable uncertainties occur at high values of (Ti − Ta)/G.

Comparison of manganin, InSb, and strain gage pressure transducers

1990 ◽  
Vol 5 (1-6) ◽  
pp. 804-806 ◽  
Author(s):  
Vern E. Bean ◽  
G. F. Molinar
Keyword(s):  
Strain Gage ◽  
Pressure Transducers ◽  
Gage Pressure

The Oxidative Softening of Synthetic Rubber Latex

1958 ◽  
Vol 31 (2) ◽  
pp. 262-277 ◽  
Author(s):  
P. Herte
Keyword(s):  
Rubber Latex ◽  
Rubber Industry ◽  
Synthetic Rubber ◽  
Reaction Tube ◽  
Gage Pressure ◽  
Alkyl Phenols ◽  
Softening Process

Abstract A method is described for plasticizing Buna S3 when still as a latex. A plasticization of Buna S3 to the Buna S4 stage is carried out in the presence of metal sols or alkyl phenols, and through use of air or oxygen-enriched air. Softening takes place under low gage pressure, at temperatures around 100° C, and at rates that are technically feasible. In contrast to Buna S4 that has been produced soft by means of polymerization control, the Buna S4 obtained through this softening process has certain advantages, e.g., higher elasticity values in heavily-loaded compounds. So-called recovery can be retarded by careful dosing with phenyl-2-napththylamine. The introduction of this process into the synthetic rubber industry, using continuous latex breakdown in a countercurrent reaction tube, is discussed.

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