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This article uses the neural network method and numerical data for predicting the performance of an integrated energy system. The studied system is an integrated energy system consisting of a gas turbine with an air preheater and subsystems such as the Kalina cycle, supercritical carbon oxide cycle and hydrogen production. In this unit, a photovoltaic thermal (PVT) module has been used to generate electric power, as well as heating and starting the organic Rankine cycle. In addition, a Proton exchange membrane (PEM) electrolyzer to produce hydrogen is integrated. To propose a model that can predict the behavior of the integrated system by changing the parameters, the important outputs of the system such as energy efficiency, exergy efficiency, exergy destruction rate and net output power have been extracted in the form of functions according to the input parameters namely T 11 , P 11 , P 18 , R p. The results show that the suggested functions of four outputs have the acceptable value for mean square error and regression coefficient which show high accuracy. The influence of each variable on each other and their interaction on the responses are drawn and adequately explained using three-dimensional response surface diagrams. The analysis represented that the amount of exergy destruction in the high-pressure ratio is at its maximum value with the increase in the temperature of point 4. In addition, it is at its maximum value in the high-pressure ratio with different changes in the pressure of point 11. Generally, the p-values for predicted values less than 0.001 represent that the model is statistically considerable at the 99 % confidence level. The p-values for suggested functions show a high level of confidence. [ABSTRACT FROM AUTHOR]

One of the key considerations in the design and operation of process industries nowadays is reducing energy waste. The purpose of this research is to assess fluid flow and heat transfer in pillow-plate heat exchangers (PPHEs) using nanofluids for the Organic Rankine Cycle (ORC) in Municipal Solid Waste (MSW) power plants. The thermal performance and hydraulic features of the PPHE were investigated using a two-phase numerical modeling approach. three nanoparticles of Cu, TiO 2 , and Al 2 O 3 were examined. To precisely determine the temperature distribution within the heat exchanger, various boundary conditions were used. The results demonstrate a strong correlation between the velocity field and temperature, underlining the importance of boundary conditions in determining the temperature profile. Furthermore, the two-phase model illustrates that nanofluids are extremely reliant on inlet velocity and volume fraction. such that at a 2 m/s inlet velocity, increasing the volume percentage to 12.8% contributes to heat transfer coefficient improvements of 7.57%, 12.15%, and 2.71% for water_TiO 2 , water_Al 2 O 3 , and water_Cu, respectively. These findings give significant insight into the fluid flow and heat transfer properties of PPHEs, as well as prospective pathways for increasing thermal performance and decreasing pump power in ORC systems using nanofluids in MSW-generating plants. [ABSTRACT FROM AUTHOR]

This study utilizes numerical simulation to assess the efficacy of a novel turbulator (NT) on Energy analysis (performance thermohydraulic) and exergy efficiency (η ex) of a dual-tube, heat exchanger (H.E) filled, two-phase method (TPM) ZnO-MWCNT /water, hybrid nanofluid (H.N.F). This system can be used for the novel exhaust air heat recovery system consisting of a nanofluid-based building integrated photovoltaic/thermal system or an earth-water heat exchanger. The pressure-based solver problem is employed to simulate nanofluid (NF) steady flow. ZnO-MWCNT/water TPM HNF is simulated using the Eulerian model. Inlet Reynolds number (Re) changes 10,000 to 28,000, volume fraction (φ) of ZnO and MWCNT nanoparticles (NPs) varies from 1% to 3%, and the pitch ratio (λ) of the NT is assumed to be 0, 0.25, 0.50, and 1. The discretization of the equations is done using the second-order upwind method for more accuracy in the calculations and the SIMPLE algorithm is utilized to couple the velocity (V) and pressure (P) equations. Also, the results demonstrate that the thermal performance (TP) is highly dependent on the changes in φ and Re of the HNF entering dual-tube HE. Besides, the pressure drop (Δp) is strongly dependent on the inlet V in the dual-tube HE. In addition, the use of a NT is desirable for 10,000 < Re < 28,000 and 1% < φ < 3%. Finally, the η ex of the dual-tube HE with a NT with λ = 4 is A better version by 47.22% and φ = 3% and Re enhances 10,000 to 28,000. [ABSTRACT FROM AUTHOR]

YOUR HOME Our cleaning dynamo shares her tips and tricks to tackle your toughest cleaning challenges and all your trouble spots. Use your vacuum's upholstery tool to "dust" fabric drapes and valances. GH Lab pick: Swiffer Duster Heavy Duty 6-Foot Super Extender, $18, Amazon 17 Vacuum the slats of heating and air-conditioning vents. [Extracted from the article]

A study conducted by researchers at the Zhejiang Academy of Forestry in Hangzhou, China, explored the effects of traditional processing methods on the medicinal properties of Polygonatum cyrtonema rhizome. The researchers found that nine cycles of steaming and drying significantly increased the accumulation of secondary metabolites in the processed rhizomes compared to unprocessed crude rhizomes. The first three processing cycles induced the most drastic changes in the accumulation of functional components, while continued processing beyond six cycles reversed or weakened the enhancing effects. The study suggests that traditional processing can enhance the medicinal effects of P. cyrtonema rhizome by enhancing chemical synthesis and inducing structural transformation of functional components. [Extracted from the article]

A patent has been issued for a modular, mobile, and automated solvent extraction and distillation system, along with methods of using it. The patent addresses the need for larger-scale and more efficient processing of botanical extractions. The system involves feeding plant-based raw materials into an extraction reactor, introducing a solvent and non-condensable gas, operating the reactor under specific conditions, distilling the solvent to generate purified extract, and recovering residual solvent from the solid material. The process can be continuous or semi-continuous, automated, and has the potential for high yields of purified extract. [Extracted from the article]

A study conducted by researchers at the Beijing Institute of Technology in China explores the use of an organic Rankine cycle (ORC) system to address the challenges of high exhaust temperature in natural gas engines. The ORC system recovers exhaust energy and reduces exhaust temperature, thereby enhancing power output and extending the lifespan of the three-way catalyst (TWC). Simulation-based investigations show that the ORC system can significantly decrease thermal damage to the TWC and extend its lifespan, while also recovering exhaust energy under various road conditions. The study suggests that ORC-TWC coupling can effectively alleviate thermal aging and provides valuable insights for future research in this area. [Extracted from the article]

A study conducted by researchers at Liaoning University of Traditional Chinese Medicine in Dalian, China, aimed to identify the active components of black ginseng that are responsible for treating prostate cancer. The researchers established HPLC fingerprints of processed ginseng and performed tests to evaluate the inhibitory activity of black ginseng on prostate cancer cells. The results showed that the anti-prostate cancer activity of black ginseng increased with the number of steaming and sun-drying cycles, and the primary anti-prostate cancer ingredients were identified as ginsenosides Rg5, F4, Rh4, Rk1, R-Rg3, and S-Rg3. This study provides a theoretical basis for the quality evaluation of black ginseng and highlights its potential as an anticancer agent. [Extracted from the article]

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A 3-D Rankine type Green function boundary element method is developed to estimate the unsteady hydrodynamic interaction during ship passing piers process. To address this moving boundary problem, a free surface re-meshing algorithm based on the combination of local mesh and global mesh is proposed to update fluid boundary and the boundary value formula is solved at each time step. Two alternative numerical models for ship passing piers problem are compared with the current analysis method. Based on the three numerical models, the characteristics of the hydrodynamic loads acting on the passing ship are specified and the critical positions for the peak values have been identified. Simulation results demonstrate that the fluid disturbance induced by the piers is of importance. Therefore, the study of ship–piers hydrodynamic interaction in a river must be handled as a different forward speeds problem. Additionally, the wave elevation effect can only be neglected on condition that the forward speed is very low. [ABSTRACT FROM AUTHOR]

The instability of the compressible Rankine vortex is investigated using a multioperators-based scheme with the tenth-order approximation to the convection terms of the fluid dynamics equations supplied by the ninth-order dissipation mechanism. The scheme was optimized for high resolution of small scales by choosing its free parameters. The results of long-term calculations with several meshes allowed to reproduce the general scenario of the instability development with self-excitations of different modes and the final stage of rotating quadrupole sound radiation. The calculated frequencies and sound pressure levels are presented for several Mach numbers. [ABSTRACT FROM AUTHOR]

Narrower Chinese steelmaking margins so far in 2023 have continued to support demand for lower-grade iron ore fines, which has led to historically-low discount levels and narrowed the gap to the price of higher-grade material - thereby putting pressure on steel mills to cut production rates, sources told Fastmarkets this week. [ABSTRACT FROM AUTHOR]

The article states that Australia, ASCOAT Industrial Floor Surfacing's Technical Manager, Arthur Karayannis, emphasizes the importance of selecting the appropriate non-slip floor covering for moisture-prone workplaces, such as food and beverage manufacturing plants. It mentions that when selecting flooring solutions, it is important to consider various factors like light reflectivity, impact resistance, and cleanability, in addition, to slip resistance.

The article offers information on the evolution of battery technology and fuel-cell Air Independent Propulsion (AIP) systems along with their competition with Rankine and Stirling cycle systems. Topics discussed include use of air fuel cells by inserting nitrogen circuit reduces oxygen consumption and operating costs according to DCNS; methanol based systems for medium to large submarines according to HDW; and Saab developed AIP system based on Stirling cycle external combustion piston engine.

Additionally, a market survey was conducted, and ten established ORC manufactures contributed their perspective on the ORC market. Keywords for this news article include: Bavaria, Germany, Europe, CDC and FDA, Technical University Munich (TU Munich). Keywords: Bavaria; Germany; Europe; CDC and FDA EN Bavaria Germany Europe CDC and FDA 846 846 1 05/29/23 20230602 NES 230602 2023 JUN 4 (NewsRx) -- By a News Reporter-Staff News Editor at Medical Letter on the CDC & FDA -- Investigators publish new report on CDC and FDA. [Extracted from the article]

"In other embodiments of the invention, the steam wand comprises an internal hose that carries steam to a tip of the steam wand. The controller may use the location information for a variety of purposes such as initiating a steam purge cycle, preventing unsafe use of the steam wand or providing display information. A steam wand device for a beverage maker, comprising: a metallic body tube; the tube having a steam hose within it; the hose that is within the tube passing through an elongated, flexible coil that inhibits the hose from contacting an interior of the tube. [Extracted from the article]

With about 30% of fuel energy carried by exhaust gases representing up to 10% potential work, waste heat recovery systems seems to be a way to improve significantly fuel economy. Bottoming cycle based on Organic Rankine Cycle (ORC) is today one of the most promising technologies to recover that heat and convert it into useful energy, either mechanical or electrical. In that paper we will present design methods for such system starting from mission profile analysis to components specifications and performance assessment for a typical journey, by using both simulation and experimental inputs. In that analysis, we will also include costs constraints by limiting components size and efficiency to get realistic fuel saving prognosis. Engine used for that study is a 6 cylinders 13L diesel engine, and fuel saving up to 5% can be reached on design point. [ABSTRACT FROM AUTHOR]

Nowadays the reliable modeling of real fluid flows is of paramount importance in many industrial applications, especially in the energy field with the growing diffusion of Organic Rankine Cycles, supercritical CO 2 compressors, and advanced refrigeration systems. In these applications the assumption of flow ideality is profoundly inaccurate and may lead to erroneous physical interpretations. As a consequence thereof, various thermodynamic models have been recently developed for real gases and a number of tools are by now available to accurately predict the thermodynamic properties of fluids in presence of relevant non-ideal effects. However, these thermodynamic libraries are frequently computationally inefficient when coupled with existing simulation codes, such as in process modeling and computational fluid-dynamics (CFD). An effective alternative is proposed in this paper. The equations of state embedded in the thermodynamic programs are used, at preliminary level, to construct a grid of nodes storing a subset of thermo-physical properties, i.e. v , s , e , k , μ , required by the method for a given region of interest. Then, an interpolation-based method is conceived for determining the remaining properties in any other point. A key feature is as follows: the nodal values of the basic thermodynamic quantities are used to locally construct, i.e., within each cell of the table, a model of the fundamental relation, assuming a differentiable functional form of at least C 2 class. The presented Look-up Table (LuT) approach is intrinsically consistent and guarantees thermodynamic stability, with inherent high accuracy and very limited computational costs, as demonstrated by the quantitative examples reported in the paper. As a final step, the LuT method is coupled with two in-house flow solvers and applied to simulate real gas transonic flow in Organic Rankine Cycle turbines; a comprehensive assessment of the approach is provided by comparison with direct equations of state implementation. [ABSTRACT FROM AUTHOR]

The Rankine-Hugoniot-Riemann (RHR) solver has been designed to solve steady multidimensional conservation laws with source terms. The solver uses a novel way of incorporating cross fluxes as source terms. The combined source term from the cross fluxes and normal source terms is imposed in the middle of a cell, causing a jump in the solution according to the Rankine-Hugoniot condition. The resulting Riemann problems at the cell faces are then solved by a conventional Riemann solver. We prove that the solver is of second order accuracy for rectangular grids and confirm this by its application to the 2D scalar advection equation, the 2D isothermal Euler equations and the 2D shallow water equations. For these cases, the error of the RHR solver is comparable to or smaller than that of a standard Riemann solver with a MUSCL scheme. The RHR solver is also applied to the 2D full Euler equations for a channel flow with injection, and shown to be comparable to a MUSCL solver. [ABSTRACT FROM AUTHOR]

The article offers information on the advantages of advancement in CO2 exhaust heat recovery technology for energy efficient ships. Topics discussed include use of Exhaust Heat Recovery (EHR) systems for high recoverable energy, CO2 system based on Rankine Cycle, and advantages of CO2 heat recovery cycle for marine installation. Other topic discussed include utilization of exhaust heat for the marine industry.

Abstract: Classical artificial viscosity methods often suffer from excessive numerical viscosity both at and away from shocks. While a proper amount of dissipation is necessary at the shock wave, it should be minimized away from the shock and disappear where the flow is smooth. The common approach to remove the excessive dissipation is to introduce a limiter. We use a limiting methodology based on nonlinear hybridization, which generalizes to multiple dimensions naturally. Moreover, the properties of the limiter are made mesh independent through abiding by important symmetry and invariance characteristics. A secondary impact of the approach is the use of more optimal coefficients for the viscosity itself. The coefficients can be derived directly through analysis of the Rankine–Hugoniot relations. We can further refine our approach with the use of hyperviscous dissipation that helps to more effectively control oscillations. The hyperviscosity is defined by applying a filter to the original unlimited viscosity, which is then combined using the original limiter. The combination of the limiter with the hyperviscosity produces sharp shock transitions while effectively reducing the amount of high frequency noise emitted by the shock. These characteristics are demonstrated computationally and we show that the limiter returns the overall method to second-order accuracy with or without the contribution of the hyperviscosity. [Copyright &y& Elsevier]

The article discusses the use of supercritical technology to improve power plant cycle efficiency. It provides an overview of the technology which refers to the steam where there is no clear distinction between the water and steam phase in the Rankine cycle. The ability of supercritical technology to provide larger size units to meet the power demand of India is explored.

The article presents an insight into the commercial and progressive geothermal technologies market as of 2016. It discusses the growth of flash, dry steam and binary/organic rankine cycle (ORC) turbine technologies, the potential of enhanced geothermal systems (EGS) technology and data from the Geothermal Energy Association (GEA) indicating that the global geothermal market is at 13.3 gigawatts (GW) of operating capacity in 24 countries and at 12.5 GW of planned capacity in 82 countries.

The article presents a study on the existence of jump conditions for the two-dimensional (2D) maximum entropy principle (MEP) hydrodynamical model of charge transport in semiconductors. The study applied a standard approach to find jump conditions of semiconductors with smooth components parted by a surface of hard discontinuity. The study shows the authenticity of the introduction of surface current and surface charge in the Rankine-Hugoniot jump conditions.

This article discusses the development of energy recycling infrastructure that can convert waste power into heat or vice-versa. The historic development of combined heating and power (CHP) systems by people such as the inventor Thomas Edison is considered. The article explains the inefficiencies of the electricity generation process by reference to the Rankine cycle. The marginalization of CHP by the development of an electricity grid where generating stations were at a remove from the population centers that consumed most electricity is noted.

The article reports that a Power+ organic rankine cycle (ORC) generator from ElectraTherm has been commissioned by the firm to the Plumas County Heath and Humans Services Building in Quincy, California.

The article reports that waste heat can be converted into electricity via the organic rankine cycle (ORC) technology which is cost and energy efficient method; and mentions that energy firm Thermax has been working on the same to reduce the energy cost.

The article reports on the success of commercial operation of two biomass-fed organic rankine cycle (ORC) units applied to forestry company West Fraser Timber Co. Ltd.

The article discusses organic rankine cycle (ORC) generator maker Turboden's ORC project pipeline. It mentions that ORC systems help recover waste heat from industrial processes by using renewable energy resources such as biomass and geothermal to generate electric power. It informs about first ORC-based commercial waste heat power generation plants constructed in Torbole, Italy in 1997.

An interview with Louis Giogaia, manager of Gringer & Sons Appliances is presented. When asked about why clothes washers, dryers and dishwashers have steam cycles, he states that people like the idea of sanitizing their clothes and utensils because the cycles are on a lot of top-of-the-line appliances. He implies that those machines can dry clothes without leaving them wrinkled. Giogaia infers that a steam cycle is a good add-on of an allergy sufferer and it can kill mites due to its hotness.