A Mathematical Model of the Working Processes of a Hybrid Power Displacement Piston Machine with Profiled Groove Seal

2018 ◽  
Vol 54 (5-6) ◽  
pp. 335-344 ◽  
Author(s):  
V. E. Shcherba ◽  
V. V. Shalai ◽  
V. N. Kostyukov ◽  
A. P. Naumenko ◽  
A. S. Noskov ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Hybrid Power ◽  
Groove Seal ◽  
Working Processes

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%).

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 %.

scholarly journals Control of a stand-alone photovoltaic/battery bank system to supply energy to resistance load

2019 ◽  
Vol 8 (1) ◽  
pp. 93
Author(s):  
G. Giftson Samuel ◽  
M. Muthuramaligam ◽  
P. S. Manoharan ◽  
C. Christober Asir Rajan
Keyword(s):  
Mathematical Model ◽  
Power System ◽  
Hybrid System ◽  
Pv System ◽  
Hybrid Power ◽  
Supervisor Control ◽  
Battery Bank ◽  
Bank System ◽  
The Mathematical Model ◽  
Model Topology

<p><span lang="EN-US">In this paper, supervisor control for stand-alone hybrid power system to supply energy to resistance load is presented. The hybrid system is used to produce energy withoutinterruption and it consists of a photovoltaic generator (PV), and a battery bank. PV system work in parallel via DC/DC converter and the battery bank is used to store the excess of energy. The mathematical model topology, the identification of each subsystem and the control supervision of theglobal system are the contribution of this paper. Obtained results under Matlab/Simulink presented and discussed.</span></p>

Dynamics of Working Processes in Automatic Direct-Acting Pressure Regulators of Pneumatic Spacecraft Systems

2021 ◽  
pp. 65-76
Author(s):  
A.V. Lebedev ◽  
A.V. Chernyshev ◽  
Y.V. Kyurdzhiev ◽  
A.P. Mitrofanov ◽  
O.S. Ilicheva ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Software Package ◽  
Block Diagram ◽  
Working Fluid ◽  
Pressure Regulator ◽  
Conservation Of Energy ◽  
General Mathematical Model ◽  
Direct Acting ◽  
The Mathematical Model ◽  
Working Processes

The purpose of the study was by means of modern software to explore working processes taking place in automatic direct-acting pressure regulators of pneumatic spacecraft systems. As a result, we developed a general mathematical model of the pressure regulator. The design of the regulator is shown in the form of a block diagram, composed of a set of channels, cavities, and stages. The elements of the block diagram are interconnected by the basic laws of conservation of energy and mass. The mathematical model was evaluated in the Amesim software package. Findings of the full-scale and computational experiments led to the conclusions about the effect the heat exchange between the working fluid and the environment produces on the parameters of the pressure regulator, and about the use of the Amesim software package for further research of working processes in the valve units of pneumatic systems.

scholarly journals The main results of the development of the transmission a promising chassis for the placement of a mobile transport and overloading rope complex

2021 ◽  
Vol 7 (1) ◽  
pp. 66-72
Author(s):  
V.I. Tarichko ◽  
◽  
D.I. Perminova ◽  
Keyword(s):  
Mathematical Model ◽  
High Power ◽  
Base Stations ◽  
Competitive Advantages ◽  
Selection Of ◽  
Working Processes

The article presents the results of the development of a chassis for the placement of transport and technological machines equipped with a transmission with the possibility of taking off high power (in relation to the power of the standard running engine). Based on the analysis of the market and advertising campaigns of the leading manufacturers of trucks and wheel chassis, a conclusion is made about the competitive advantages of a chassis with a large selection of power. A detailed diagram of the developed transmission is given. A mathematical model is presented for the study of dynamic working processes in the transmission when using the chassis for the placement of base stations of mobile transport and reloading rope complexes (mobile cable cars).

scholarly journals Power Prediction-Based Model Predictive Control for Energy Management in Land and Air Vehicle with Turboshaft Engine

Complexity ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-24
Author(s):  
Zhengchao Wei ◽  
Yue Ma ◽  
Changle Xiang ◽  
Dabo Liu
Keyword(s):  
Mathematical Model ◽  
Model Predictive Control ◽  
Energy Management ◽  
Predictive Control ◽  
High Performance ◽  
Gas Temperature ◽  
Power Prediction ◽  
Energy Management Strategy ◽  
Hybrid Power ◽  
Turboshaft Engine

In recent years, the green aviation technology draws more attention, and more hybrid power units have been applied to the aerial vehicles. To achieve the high performance and long lifetime of components during varied working conditions, the effective regulation of the energy management is necessary for the vehicles with hybrid power unit (HPU). In this paper, power prediction-based model predictive control (P2MPC) for energy management strategy (EMS) is proposed for the vehicle equipped with HPU based on turboshaft engine in order to maintain proper battery’s state of charge (SOC) and decrease turboshaft engine’s exhaust gas temperature (EGT). First, a modeling approach based on data-driven method is adopted to obtain the mathematical model of turboshaft engine considering time delay and inertial of states. An integrated power predictor consisting of the classification of input status and the subpredictors are developed based on the deep learning method to improve the accuracy of the prediction model of the model predictive control (MPC). Subsequently, an EMS based on MPC using the proposed power predictor is introduced to regulate the SOC of battery and the EGT of turboshaft engine. The comparison with experimental results shows the high accuracy of mathematical model of turboshaft engine. The simulation results show the effectiveness of the proposed EMS for the vehicle, and the effects of different weight coefficients of objective function on the proposed EMS are discussed.

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