Recent attempts to discover energy–efficient and cost–effective power generation systems unleash tremendous capabilities of urban rooftops vertical–axis wind turbines (VAWT). Their advantages Omni–directionality, low noise less maintenance cost allow direct integration neighborhood having unstable conditions. Despite continuous effort investigate performance under a range operating conditions, aspects such as Turbulent Intensity (TI) ground clearance remain relatively explored. Such effects...

The reliance on Computational Fluid Dynamics (CFD) simulations has drastically increased over time to evaluate the aerodynamic performance of small-scale wind turbines. With rapid variability in customer demand, industrial requirements, economic constraints, and limitations associated with design development turbines, trade-off between computational resources simulation’s numerical accuracy may vary significantly. In context turbine analysis, high fidelity simulation under full geometric...

A wide range of previously designed methods for faster parametrization partial differential equations requires them to be solved using existing finite volume, element, and difference solvers. Due the requirement high degrees freedom accurately model physical system, computational costs often becomes a bottle-neck. It poses challenges conducting efficient repeated parametric sampling input parameter that disrupts whole design process. Model reduction techniques adopted fidelity systems...

This paper introduces a novel design of double glazed box type solar cooker having an L-shaped absorber plate with one internal (bottom) and two external plane reflectors. A series experiments were performed to access the cooker's thermal performance at location Taxila (33.74°N, 72.80°E) in Pakistan during year 2017. The is evaluated terms maximum temperature other indicators like first second figures merits (F1 F2), parameter index, energy efficiency, utilizable efficiency. experimentally...

Solar cookers and dryers are normally used as separate units due to different operating temperature requirements for cooking drying of food products. A unique design a compounded solar cooker dryer unit is presented in this paper its performance evaluated on the basis outdoor experimentation. Two compartments serving joined together by providing small air flow passages such manner that lower high-temperature portion also acts an heater upper low-temperature movement buoyancy-driven natural...

High-fidelity numerical simulations are used to thoroughly analyze the evolution of wake behind a megawatt-scale offshore wind turbine. The features classified in terms dynamics composition and associated turbulence characteristics originating from inner outer sections blades. Understanding is essential for developing compact layouts future farms. We employed transient Sliding Mesh Interface (SMI) technique fully dynamic NREL 5MW full Our high-fidelity results have been validated against...

This paper investigates the thermal performance of a unique box type solar oven whose five sides are exposed to ambient and provisions also provided install reflectors enhance intensity incident radiation on oven.Experiments were performed where temperatures attained inside cavity recorded different days times day corresponding various intensities available radiation.A steady sate heat transfer numerical model without is developed based six individual resistance networks which account for...

In this work, analytical modeling and theoretical analysis of a recently developed unique design solar cooker cum dryer (SCCD) have been conducted to predict its thermal characteristics under given set input parameters. The energy balance equations the main components cooking compartment are iteratively solved determine unknown temperatures SCCD unit when it operates as pure same acts an air heater for food drying compartment. influence parameters such velocity, glazing thickness, spacing...

The purpose of this work is to analyses the potential solar for space and water heating application in a commercial building winters. In research, based system designing with help TRNSYS software designed on TRNSBuild according climatic conditions Islamabad Pakistan. Our has flat plat collector, storage tanks, auxiliary heater, divider pumps. Auxiliary heater gasifier which runs biogas completing heat demand cloudy days sudden requirements. working hours 0900–1700 hrs. work, we are analyzing...

In the present study, buoyancy driven flows of water and air in very high aspect ratio (12-48) horizontal rectangular enclosures are studied numerically for Rayleigh numbers ranging from 103 to 107 using open-source CFD tools obtain natural convection heat transfer coefficients which then compared with established empirical correlations based on experimental results. This study has been motivated by finding that hardly any CFD-based literature exist also fact such have numerous applications...

Abstract This research focuses on the effect of leading-edge erosion performance wind turbines, specifically GE1.5XLE horizontal axis turbine. The blade element momentum (BEM) method is used to predict eroded configurations, and open-source code QBLADE for simulation. importance including effects in design phase highlighted, as it can optimize turbine ensure operational efficiency. high tip velocity large rotors, which reach 90-110 m/s, makes them susceptible sand rain erosion, significantly...

This work pertains to the transient modeling and comparative study of active solar thermal space water heating systems using liquid air-type collectors as main energy source. The utilizes TRNSYS simulate two in context Taxila's weather data (located at 33.74°N, 72.83°E), with goal meeting peak domestic demands 20 kW 200 lit/day, respectively. water-based system (S-1) is primarily composed a collector, storage, an auxiliary heater, connections hot supply, load through water–air heat...

In the present study, buoyancy driven flows of water and air in very high aspect ratio (12-48) horizontal rectangular enclosures are studied numerically for Rayleigh numbers ranging from 103 to 107 using open-source CFD tools obtain natural convection heat transfer coefficients which then compared with established empirical correlations based on experimental results. This study has been motivated by finding that hardly any CFD-based literature exist also fact such have numerous applications...