scholarly journals Mathematical model of working processes of piston hybrid power machine of volumetric action with reduced fluctuations of gas pressure in discharge line

2019 ◽  
Vol 3 (2) ◽  
pp. 87-94
Author(s):  
V. E. Scherba ◽  
◽  
A. V. Grigor’ev ◽  
A. V. Zanin ◽  
◽  
...  
Keyword(s):  
Mathematical Model ◽  
Gas Pressure ◽  
Hybrid Power ◽  
Discharge Line ◽  
Power Machine ◽  
Hybrid Power Machine ◽  
Working Processes

An Analysis of the Cooling Intensity Effect of a Two-Cylinder Single-Stage Piston Hybrid Power Machine with Fluid Flow Due to Vacuum at Suction on the Working Processes and Indicative Efficiency

2020 ◽  
pp. 62-72
Author(s):  
V.E. Shcherba ◽  
A.Y. Ovsyannikov ◽  
E.Y. Nosov ◽  
G.S. Averyanov ◽  
S.A. Korneev ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Experimental Studies ◽  
Relative Increase ◽  
Single Stage ◽  
Intensity Effect ◽  
Technical Work ◽  
Hybrid Power ◽  
Power Machine ◽  
Hybrid Power Machine ◽  
Working Processes

In this paper, a new promising scheme of a two-cylinder single-stage piston hybrid power machine with fluid flow due to vacuum at suction is examined. A prototype is developed, and an experimental stand is created. An analysis of the influence of the coolant flow on the working processes of the machine is carried out theoretically and experimentally. The results obtained show that an increase in the coolant consumption leads to a decrease in the input technical work in the process of compression, an increase in the output technical work in the process of decompression, a reduction of the work losses in the process of discharge and an increase of the work losses in the process of suction. Based on the conducted experimental studies it is established that the optimal indicative value of the efficiency for the experimental machine under study is in the range of 300 – 400 ml/min and the relative increase in the indicative efficiency is within 7 %.

Analysis of the influence of geometric parameters on working processes in a two!stage hybrid power machine of positive displacement without a gas cap with a profiled working chamber of the second stage

2021 ◽  
pp. 6-13
Author(s):  
Keyword(s):  
Mathematical Model ◽  
Geometric Parameters ◽  
Work Processes ◽  
Two Stage ◽  
Working Chamber ◽  
Second Stage ◽  
Hybrid Power ◽  
Positive Displacement ◽  
Power Machine ◽  
Hybrid Power Machine

A principal scheme is considered and a mathematical model of work processes is developed in a two-stage hybrid power machine of positive displacement without a gas cap with a profiled working chamber of the second stage. The mathematical model is based on the basic laws of conservation of energy, volume and mass for a dropping liquid and a compressible gas in the second stage. The diameter of the supply pipeline and the initial radius of the profiled working chamber in the second stage are selected as the main geometric parameters that have the greatest influence on the work processes. The response functions are found that determine the dynamics of the fluid flow in the machine under study and its main integral characteristics. Keywords: work process, cooling, reciprocating compressor, hybrid power machine of positive displacement, profiled working chamber [email protected]

scholarly journals Development and Research of Crosshead-Free Piston Hybrid Power Machine

Machines ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 32
Author(s):  
Viktor Shcherba ◽  
Viktor Shalay ◽  
Evgeniy Nosov ◽  
Evgeniy Pavlyuchenko ◽  
Ablai-Khan Tegzhanov
Keyword(s):  
Experimental Studies ◽  
Operational Parameters ◽  
Work Processes ◽  
Free Piston ◽  
Hybrid Power ◽  
Power Machine ◽  
Hybrid Power Machine ◽  
Simplifying Assumptions ◽  
Cylinder Piston ◽  
Groove Seal

This article considers the development and research of a new design of crosshead-free piston hybrid power machine. After verification of a system of simplifying assumptions based on the fundamental laws of energy, mass, and motion conservation, as well as using the equation of state, mathematical models of the work processes of the compressor section, pump section, and liquid flow in a groove seal have been developed. In accordance with the patent for the invention, a prototype of a crosshead-free piston hybrid power machine (PHPM) was developed; it was equipped with the necessary measuring equipment and a stand for studying the prototype. Using the developed mathematical model, the physical picture of the ongoing work processes in the compressor and pump sections is considered, taking into account their interaction through a groove seal. Using the developed plan, a set of experimental studies was carried out with the main operational parameters of the crosshead-free PHPM: operating processes, temperature of the cylinder–piston group and integral parameters (supply coefficient of the compressor section, volumetric efficiency of the pump section, etc.). As a result of numerical and experimental studies, it was determined that this PHPM design has better cooling of the compressor section (decrease in temperature of the valve plate is from 10 to 15 K; decrease in temperature of intake air is from 6 to 8 K, as well as there is increase in compressor and pump section efficiency up to 5%).

Calculation of Rational Values of Discharge Pressures in the Compressor and Pump Sections of a Crossheadless Reciprocating Hybrid Power Machine

2018 ◽  
Vol 54 (5-6) ◽  
pp. 418-424 ◽  
Author(s):  
V. E. Shcherba ◽  
G. S. Aver’yanov ◽  
V. S. Kalekin ◽  
S. V. Korneev ◽  
A. S. Tegzhanov
Keyword(s):  
Hybrid Power ◽  
Power Machine ◽  
Hybrid Power Machine
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