• Energy Research

In this present work, the multi-hole jet impingement approach is used to augment the performance of the jet plate solar air heater by improving the rate of heat transfer coefficient between absorber plate and impinging air. The system's usefulness is analytically analyzed, and the influence of airflow rate, length of the collector, jet diameter, pitch distances at a stream, and span-wise directions on thermo-hydraulic efficiency is investigated by adopting Response Surface Methodology (RSM). A quadratic equation is generated by using the RSM technique, which is used to predict the thermohydraulic efficiency. The results show that the optimized results of the design parameters are at the airflow rate of 0.01386 kg/s, 1.5108 m of length, 0.0046 m of jet diameter with a stream-wise pitch distance of 0.05108 span-wise pitch distance of 0 0.03414 m. The comparison results show that the RSM model evaluated values have a deviation within a range of ±1.78% compared with the analytical values developed by the model.

Withdrawal: Techno‐economic feasibility analysis of Integrated Renewable Energy System for an urban area in Nanded, Pune – A detailed case study and analysis, A. B. KanasePatil, A. P. Kaldate, A. J. Al‐rubaie, S. Muthusamy, H. Panchal, A. K. Loganathan, M. M. JaberThe above article from Environmental Progress and Sustainable Energy, published online on 14 November 2022 in Wiley Online Library (http://wileyonlinelibrary.com) has been withdrawn by agreement between the journal Editor in Chief, Martin Abraham and Wiley Periodicals LLC. The withdrawal has been agreed following no response from the author to requests to sign the Journal's publishing license.

AbstractThe researchers attract nanofluids due to their improved thermal and physical properties compared to the base fluid. The colloidal mixture of nanometre-sized particles with conventional fluid is known as nanofluids. Compared with single nanofluids, hybrid nanofluids show better enhancement in thermophysical properties. Combining nanoparticles into the host fluid is called a hybrid nanofluid. The preparation of nanofluid needs more importance. However, the physiochemical properties of the nanofluid mainly depend on the stability of the nanofluid. The article aims to provide detailed information about preparing different types of single and hybrid nanofluids dispersed in various base fluids, preparation techniques, stabilization processes, applications and challenges. Different types of surfactants and characterization methods are suggested to improve the stability of the prepared solution. It was observed that all types of nanoparticles and hybrid nanoparticles could be synthesized with different base fluids with the help of the sonication process, particle-to-surfactant ratio, magnetic stirrer and many more. The two-step method is mostly preferred by the researchers compared to the single-step method to prepare the nanofluid. Application of single and hybrid nanofluids has been highlighted in different areas; few challenges have also been identified and must be checked before implementation in the industry.

This article presents the design of the test station, which is accessible for the testing of electric bicycles. In this process, a low-power Brushless Dc traction vehicle or a high-powered motor sc...

Due to the rapid increase on world population, the demand for potable water is also getting increased. The solar distillation process is one among the prominent options, for those facing shortage of water in rural areas. Many researchers have put tremendous effort in designing a solar still with better efficiency in the last decade. Current review article demonstrates the recent studies carried out on pyramid solar still to enhance the distillate output. It includes the use of use of fins, phase change materials, coatings, flat plate collector, and evacuated tube collector to enhance the distillate output of pyramid solar still. Comparison of various parameters for different solar distillation system and various aspects in improving the performance of a pyramid solar still also discussed in tabular form. At last, Scope of further research & recommendations for Pyramid solar still is added for help to researchers. This publication was supported by Qatar University Internal Grant No. QPH3P-CAM-2021-452.

At this present research paper, solid particles jet into turbulent cross-flow trajectories and turbulence structure adaptations are presented for a non-reacting (No combustion) flow conditions. Add...

AbstractThe utilization of electric energy is rising in the technological world. Solar PV (photovoltaic) cells convert sunlight into electricity, and sunlight radiation also has heat, reducing the panel's efficiency. The heat should control the limited value or otherwise reduce the panel's performance so that heat is moved to the cooling medium, thus maintaining the heat within the functioning limit. The proposed method is explained by the probability of cooling the monocrystalline and polycrystalline structures used as neem oil through an integrated oil container fitted into the unit's backside—the neem oil acts as phase-changing material (PCM). The solar PV rear side neem oil absorbs the heat of the solar PV panel. The neem oil is not filled in the backside tank completely for the reason that the oil needed some breathing gap. The breathing gap of PCM is to enhance the heat-withstand efficiency. The backside neem oil is replaced every 30 min. As an outcome, the front side of solar PV heat is reduced. Neem oil has not polluted the environment and is thus also used to exchange noxious mineral oils. The neem oil moved from the depository tank to the backside of the unit and together into an additional depositor tank, thus being able to be reused. The proposed method is investigated, and functioning comparison occurs in different PV types, such as monocrystalline and polycrystalline modules, with various kinds of edible oil. Thus, the critical outcomes of the monocrystalline and polycrystalline PV panels are to decrease the panel temperature by 2.29% and 4.34%, respectively, and enhance the efficiency of the PV panels by 15.0% and 17.8%, respectively.

Abstract Drinking water is a necessity not only for humanity but also for the all living organisms available in the earth today. But the availability of the potable water is not in abundant amount; hence clean water is scarce in the world today. Solar desalination system is used to turn the saline water into the freshwater by use of sunrays. Solar still is a device which can be employed for desalination. As the daily productivity of solar distiller is low so, multiple techniques have been used by various researchers to improve its productivity. But work done on the fins to enhance the distillate output is not much. Fin is a low-cost heat transfer enhancement which is used by many researchers in the solar thermal applications. Present review paper shows the use of fins in solar still and how it can be used to enhance the distillate output of solar still. At last, a table is also presented to show the use of fins to increase the distillate output alone and with the use of certain materials.