A novel free piston expander-linear generator (FPE-LG) integrated unit was proposed to recover waste heat efficiently from vehicle engine. This can be used in a small-scale Organic Rankine Cycle (ORC) system and directly convert the thermodynamic energy of working fluid into electric energy. The conceptual design expander (FPE) introduced discussed. cam plate corresponding valve train were control inlet outlet timing FPE. principle FPE-LG proven feasible using an air test rig. indicated...

The pressure distribution around a cylinder is one of the classical aerodynamic problems involving Reynolds number (Re) effects. This paper presents development novel distributed synchronous force measurement system, which experimentally investigates effects surface roughness and incoming turbulence on short model with diameter 5 m under supercritical regime (Re = 2 × 106, 3.5 106). study indicates that both significantly alter distribution, albeit through distinct mechanisms. Roughness...

Objective: To analyze the effects of goal-directed fluid therapy on postoperative cerebral oxygen metabolism level (rScO2), blood pressure (MAP), heart rate (HR), and incidence intraoperative hypotension delirium in elderly hip fracture patients. Methods: Sixty-six patients who underwent surgery under intrathecal anesthesia a hospital between October 2023 September 2024 were selected divided into control group an observation using mean score method, each with 33 cases. Both groups given...

The flow around a cylinder is classical aerodynamic problem involving the effect of Reynolds number (Re). Thus far, impact turbulence has not been fully clarified despite its important practical value in engineering applications. This study mainly investigates influence critical Re regime on smooth and turbulent flows cylinder. foregoing accomplished by conducting static pressure measurement model experiments range 1.6 × 105–6.1 105 intensity (Iu) 5%–13%. Consequently, series useful results...

To efficiently recover the waste heat from a diesel engine exhaust, regenerative organic Rankine cycle (RORC) system was employed, and butane, R124, R416A, R134a were used as working fluids. The resulting engine-RORC combined defined relevant evaluation indexes proposed. First, variation tendency of exhaust energy rate under various operating conditions analyzed using experimental data. thermodynamic model RORC established based on first second laws thermodynamics, net power output exergy...

The article presents a mathematical theoretical framework and fitting parameters with aspects of joint probability distribution wind rain, separate rain action, coupled effects on steady unsteady forces acting some typical bluff bodies. Gumbel copula functions were first selected to describe the speed intensity. Then, two models, raindrop impact model an equivalent air density model, adopted quantify loading action considering only simplified superimposition show that it would be accurate...

A study on flocculation control based fractal theory was carried out.Optimization test of chemical coagulant dosage confirmed that the dimension could reflect degree and settling characteristics aggregates good correlation with turbidity settled effluent.So can be used as major parameter for system achieve self-acting adjustment dosage.The further out effects various parameters, among which are dependency relationship dimension, dosage, effluent under conditions variable water quality...

Wind power generator with high permeability and distributed access to distribution network, the complex magnetic transient characteristics of wind may cause maloperation or misstrip existing relay protection schemes. This paper focuses on research adaptability network line based double fed induction for object. Firstly, frequency offset DFIG in fault are analyzed. Secondly, influence frequency, amplitude phase short circuit current using traditional differential principle is further Finally,...

In order to improve the reliability and stability of automobile suspension system, important parts control arm is studied. Reverse engineering technology applied reverse modeling according characteristics complicated shape. At same time, analyzed under load condition ensure that safe in process driving. The meshing strength analysis are completed by ANSYS software. Finally, fatigue module used verify can meet requirement strength.

Abstract An experimental investigation was conducted to study the holdup distribution of oil and water two‐phase flow in two parallel tubes with unequal tube diameter. Tests were performed using white (of viscosity 52 mPa s density 860 kg/m 3 ) tap as liquid phases at room temperature atmospheric outlet pressure. Measurements taken rates from 0.5 12.5 m /h input volume fractions 94 %. Results showed that there different pattern maps between run bypass when oil‐water is found tubes. At low...

An experimental study was carried out to investigate the behavior of a new type multicantilever prestressed composite beams with corrugated steel webs (CBCW). The main mechanical performances CBCW, such as efficiency prestressing, creep and shrinkage concrete slab, load distribution, load-carrying capacity were focused on in this study. One scaled test specimen constructed tested. Based strain measurements, stress distribution factor analyzed using theories elasticity plasticity. bending...