Strain-dependency of permeability is a key feature for coupled multiphysics phenomena during heavy oil production under steam stimulation. This feature is also the basis for accurate estimation of steam needed to properly stimulate a given target heavy oil block. In this study, a fully coupled thermal-hydro-mechanical model is established and applied to the numerical simulation of steam injection in

Superchargers have become a focus of much research into new-energy vehicles, for which the cooling of high-current cable cores is a key problem that needs to be solved. To estimate influences of different core structures of liquid-cooled cables on the fluid flow and heat transfer characteristics in circular pipes, nine helical cable core structures with insertion of smooth pipes were designed taking

The accurate determination of coal temperature in hidden space such as goaf has always been a worldwide problem that needs to be solved. The research of coal temperature prediction model has important practical significance for the accurate detection of loose coal temperature. Based on the coal natural ignition experiment and coal spontaneous combustion gas characterization index as the initial data

HFO is the fuel that marine engines utilize the most frequently due to its cost-effectiveness and high energy density, but it releases many harmful pollutant emissions. With increasingly stringent regulations for marine vessels, exploring fuel optimization method for HFO to reduce pollutant emissions is essential. This study concerned the exploration of spray, combustion and emission characteristics

Partial-admission impulse turbine is suitable for small-scale power cycles with a high expansion pressure ratio (EPR) and a low mass flow rate. However, the exit velocity of a single-stage turbine is very high, leading to a large exit loss. A new two-stage counter-rotating impulse turbine has been developed to recover the exit loss, which has a novel structure without stator between the two rotors

Decarbonizing industrial heating globally is a significant challenge, driving the integration of high-temperature heat pumps for heat recovery and electrification in the industrial sector. However, current high-temperature heat pumps with low global warming potential refrigerants face limitations in delivering high-temperature heat due to their restricted compressor discharge temperature or require

The heritage buildings of a country or region are frequently considered to be of value and significance to the current generation. This study investigates the winter indoor thermal comfort of heritage buildings in hot summer and cold winter zone of China. Field measurements and questionnaire surveys were used to conduct specific studies on the winter indoor thermal comfort of two typical traditional

Using phase change materials (PCM) can effectively ensure the stable operation of semiconductor thermoelectric generators (TEGs). Conventional PCM-TEG structures exhibit relatively poor output performance due to energy barriers caused by low thermal conductivity. The embedded PCM-TEGs proposed in this study can address this issue well by adopting variable structure composite forms of PCM and TEG, resulting

This paper aims to assess the effectiveness of incorporating inclined glazing with double low-emissivity (low-e) glazing, in glazed, green-certified office buildings in Malaysia. The study was conducted in an open workspace facing south and west. Comparisons were conducted between measurements made on weekdays when cooling systems were active and weekends when they were not in use. The analysis considered

Key factors for assessing the high-temperature resistance of coal gangue concrete are high-temperature residual strength and thermal properties. The high-temperature residual strength, high-temperature thermal conductivity, high-temperature specific heat capacity, and high-temperature density of concrete with various coal gangue coarse aggregate replacement ratios were tested using experimental methods

The current research looks into magnetohydrodynamics Casson nanofluid flow and suction/injection implications for a nonlinearly stretched interface. To improve heat transport, joules of heat, radiation impacts and thermal stratification are used. A Darcy-Forchheimer porous media is used to conduct fluid flow. Chemical reactions involving energies of activation and solutal stratum are additionally considered

The increasing heating demand calls for a correspondingly augmented heating capacity of the primary heating network. However, due to the restriction of existing pipes, the heating capacity can be finitely increased. Therefore, based on the organic Rankine cycle (ORC) and vapor compression cycle (VCC), a novel thermal station is proposed to realize self-augmented heating capacity. Based on laws of thermodynamics

The current study concentrated on performance, combustion and emission characteristics of a direct injection diesel engine. The experiments were carried out on single cylinder Kirloskar make TV-1 diesel engine test-rig. The blends were made using equal parts of Karanja biodiesel (Pongamia pinnata) and 1-butanol with plain diesel. For the experiment, five mixes were investigated at constant speed of

Rock-filled concrete (RFC) is a highly heterogeneous material composed of rock blocks and self-compacting concrete (SCC). There is still limited literature regarding the non-uniform thermal behavior of early-age RFC, making it difficult to predict equivalent homogeneous parameters. In this study, a novel mesoscopic FEM model was developed to simulate the full-scale heterogeneous RFC, both considering

The clothes dryer is one of the most energy-consuming household appliances. Modeling the rotating drum within clothes dryers presents significant challenges due to the concurrent heat and mass transfer between the air and textiles, exacerbated by the random motion of textiles within the drum. To address the intricacies of drum modeling, many researchers have traditionally assumed a constant value for

This research paper presents a comprehensive thermodynamic and heat transfer study on predicting the ternary solubility of Nystatin in SC-CO2-Ethanol (supercritical CO2 and ethanol). The employed process is a thermal-based green processing for preparation of solid nanoparticles. The data collection, consisting of temperature and pressure as input features and ternary solubility as the target variable

An innovative layout of a recompression supercritical carbon dioxide (S–CO2) cycle for nuclear spacecraft was proposed in this work. Thermodynamic and exergoeconomic analysis of the innovative cycle have been performed to study the effect of essential operating parameters on the split ratio, maximum operating pressure ratio, minimum operating temperature, maximum operating temperature, and compressor

This study investigates the phase change material (PCM) embedded within different lattice structures, including SC, BCC and FCC, at various porosities. The examination focuses on understanding the thermal behaviour and heat transfer characteristics during the melting and solidification processes. Key parameters analysed include the maximum temperature of the heater, PCM melting and solidification,

Diesel pilot high-pressure direct injection (HPDI) natural gas technology has been noticed and applied in medium and heavy-duty engines due to its outstanding economy and power performance. However, the combustion of two kinds of fuels will involve more injection parameters, which increases the difficulty of designing injection strategy and calibrating injection parameters. This paper investigates

A diffusion absorption refrigerator (DAR) is a heat powered refrigeration system. It uses the ammonia-water mixture as a working fluid in addition to an auxiliary inert gas. In the present work, experimental investigation and dynamic analysis of the H2O-NH3-H2 diffusion absorption refrigeration system have been carried out using different values of thermal power input to the generator and evaporator

In this study, steady and incompressible MHD movement of a viscous nanofluid past a non-linear stretching plate has been investigated mathematically by considering heat generation. Blood is employed as the base fluid. Mathematical modeling and analysis are attended in the presence of the permeable medium. Specifically, influences of porosity and heat generation are explored. Numerical solution of the

The purpose of current investigations is to explore the impacts of variable fluid properties on the vertical cone embedded in a porous medium for reduced skin friction rates and enhanced mass transfer rates. The flow governing systems of highly nonlinear partial differential equations is obtained by using the Rivilin Erickson tensor along with the theory of boundary layer approximation. Buongiorno

In order to recycle the sinter waste heat efficiently, the possibility of taking the low temperature flue gas emitted from sinter waste heat boiler as heat source of organic Rankine cycle for power generation is investigated in the current study. The thermodynamic and thermo-economic models of basic organic Rankine cycle (BORC) and regenerative organic Rankine cycle (RORC) were constructed, and R236ea

In the realm of thermal management for electronic systems, the efficacy of heat dissipation serves as a major predictor of the reliability and operational lifespan of electronic components. Simultaneously, within the realm of geothermal energy utilization, where harnessing the Earth’s inherent heat reservoirs is employed for power generation and direct heating applications, an intricate comprehension

This study explores non-Newtonian fluid dynamics in an axisymmetric channel with a porous boundary, focusing on its relevance to turbine cooling systems in engineering and industry. Managing fluid flow in such systems is crucial. To address the complexity, mathematical tools like the Homotopy Perturbation Method, Variational Iteration Method, and Runge-Kutta 4th numerical method are used to solve nonlinear

The effects of changing 90 mm and 110 mm plate spacings and FR factor of 0.9 kg/h, 1.3 kg/h, 1.7 kg/h, 1.9 kg/h on the total heat transfer performance and PD in the new design HX were examined. The results obtained by taking into account the change in plate spacing and FR factor of 0.9 kg/h, 1.3 kg/h, 1.7 kg/h and 1.9 kg/h, as well as variable factors, were transferred to the study and displayed in

To realize efficient utilization of energy in LNG-powered ships and zero-carbon emissions, a comprehensive energy utilization system based on zero-carbon emissions for LNG-powered ships is proposed in this study coupling the full utilization of LNG cold energy and flue gas waste heat with the carbon capture technology of oxygen-rich combustion with the LNG dual-fuel-powered bulk carrier as the object

The analysis is intended to demonstrate two-phase flow of hybrid dusty Eyring–Powell nanofluid flow over a porous cylinder with Thompson and Troian slip boundary condition. The combination of (C2H6O2) ethylene glycol (40 %) and (H2O) water (60 %) -based TC4 (TC4 is an alloy of titanium consisting of 90 % titanium, 6 % aluminium, and 4 % vanadium) was utilized to preparing the hybrid nanofluids. Ti–6Al–4V

To enhance heat and fluid exchange between main flow and near-wall flow in microchannels, a twisted blade-like fin with an advantage in stimulating both spanwise and normalwise secondary flow is proposed. The cross sections of the fin are low-drag airfoils in different orientations. The flow and heat transfer performances of microchannels with fins are numerically investigated at Re = 50–700. The results

To solve the problem of poor heat transfer effect in the subcooled region of integrated condenser, a combined condenser for instant heat pump water heater (IHPWH) was proposed and designed based on the condenser design model, aiming at obtaining an optimal design method of condenser. The off-design performances of heat pump water heater (HPWH) with a combined condenser (HPWHCC) and HPWH with an integrated

During the operation of the lithium batteries, due to energy loss, the heat will be generated. Therefore, effective heat dissipation technique is required for operation of the lithium batteries under the safe temperature limit. To increase the safety, efficiency, and lifetime of these batteries, the thermal management is an important key factor. Nickel cobalt lithium manganate (NCM) batteries have

Control of the amount of solar energy successfully absorbed by photovoltaic system equipment that can follow the movement of sunlight vertically and horizontally at any time is a very urgent need. The method used in this research activity is the utilization of the ESP8266 microcontroller as the primary control of photovoltaic movements that can follow the direction of sunlight based on information

Abstract not available

The influence of Newtonian heating (NH) is studied on heat-mass transfer problem of fractional differential type fluid. The proposed problem is modeled by using Caputo-Fabrizio fractional order derivative. A steady magnetic field of uniform strength is enforced in a perpendicular direction of flow. The set of governing equations in dimensional form accompanied by suitable initial and boundary conditions

An active sub-cooler refrigerant injection (ASCRI) based on low-grade heat source was proposed. This injection method can convert the external heat source into heating capacity (Qh) in the form of refrigerant injection enthalpy difference, thus greatly increasing the Qh and solving the problem that the heat pump with conventional refrigerant injection (CSCRI) cannot be applied in extremely cold areas

Engine oil based hybrid nanofluid flow past a non-linearly stretching surface is important in solar energy applications, combustive engines, heat exchangers and many other industrial sector machinery. In this study, engine oil based hybrid nanofluid is modeled with multi-walled carbon nanotubes and copper oxide nanoparticles to enhance the heat transfer phenomena, minimize the entropy generation and

Loop heat pipes (LHPs) have consistently garnered attention for effectively managing thermal conditions in critical electronic components of spacecraft and satellites. Particularly intriguing are LHPs equipped with bi-porous capillary wicks, demonstrating commendable flow and thermal dissipation capabilities. Despite its significance for evaluating the phase-transition heat transfer in porous structures

The main purpose of this work is to develop a transient analytical model of an industrial tea dryer based on the theory of heat and mass balance, and provide the variation characteristics in tea moisture content and drying air temperature throughout the whole drying process in the drying chamber. A numerical simulation focusing on the established transient analytical model was conducted, and the simulation

This work provides a series of fire tests in a 1/7 model tunnel to explore the influence of portal-blocking speed on tunnel fire behaviors. Burning rate, ceiling temperature, temperature distribution inside tunnel and thermal characteristic near tunnel portal are obtained and analyzed. Results shown that the comprehensive effect of portal-blocking speed on fire behavior is related to fuel area of fire

A review of the literature revealed that nanofluids are more effective in transferring heat than conventional fluids. Since there are significant gaps in the illumination of existing methods for enhancing heat transmission in nanomaterials, a thorough investigation of the previously outlined models is essential. This study’s main objective is to examine the Casson nanofluid’s Darcy-Forchheimer flow

The Cattaneo-Christov heat and mass flux theory extends classic models to provide more accurate predictions in situations with instantaneous heat and mass transfer. Herein, an enhancement of heat and mass transfer in Carreau-Yasuda (CY) tri-nanofluid (TNF) over a stretched surface is modeled and studied via generalized conservation laws subjected to Cattaneo-Christov heat and mass flux theory. Silicon

Azobenzene is a typical photoisomerization material that is widely used in photochemical energy conversion. However, it's generally operated below 200 °C to avoid thermal decomposition. To improve the thermal stability of azobenzene for higher temperature applications, this paper discussed an option that grafting azobenzene onto graphite-like carbon nitride sheets. The synthesis was evaluated based

In this experimental study, a novel approach combining a helical coiled wire (HCW) turbulator and bubble injection (BI) method has been employed to synergistically improve the heat transfer efficiency of double tube heat exchanger. The thermal-frictional characteristics were evaluated by investigating different parameters, including the bubble injection flow rate ranging from 2 to 5 l/min and HCW pitch

Owing to high thermal predictions, the scientists have utilized multidisciplinary contributions of nanofluids in various engineering and scientific problems. Based on exclusive heat transfer results, the contributions of nanomaterials are commonly addressed in thermal devices, chemical reactions, vehicle engines, fusion processes, energy outcomes and many industrial systems. Recently, it is emphasized

Double-sided packages for heat dissipation are an efficient thermal management mechanism for power semiconductor devices. A fan-out panel-level packaging (FOPLP), as one of the double-sided forms, exhibits excellent electro–thermal characteristics and provides low stray inductance and thermal resistance. Besides, the temperature at each point within the structure is closely related to its thermo–mechanical

A novel relaxation drift model (RDM) was proposed to simulate the interphase momentum non-equilibrium (slip) inside two-phase work-recovery CO2 ejectors. The RDM was validated using the experimental data of 5 different ejectors under 15 trans-critical conditions in total. The proposed model was compared with the existing homogeneous model (HM) and algebraic slip model (ASM) through case studies. The

Mucociliary clearance plays a crucial role within the respiratory system as an initial protective mechanism against infections. Hence, it is imperative to validate any assumptions made regarding the mucociliary clearance and its impact on its functionality. This study examines flow of two-dimensional Reiner-Philippoff fluid within a ciliated channel, resulting in the separation of the fluid into two

The exploration of electroosmotic peristaltic flow in asymmetric channels using hybrid non-Newtonian nanofluids holds significant promise across multiple domains. From microfluidics and electronics cooling to energy systems and biomedical applications, its implications are vast. By leveraging the distinctive attributes of nanofluids and the precision offered by electroosmotic and peristaltic flow,

The main goal of this paper is to analyze the nonlinear transient of FGSS shells subjected to blast loading in a thermal environment using the MITC4 based on FSDT. The MITC4 originates from a three-dimensional continuum description degenerated to shell behaviour which can be applied to both thick and thin shells. The FGSS shell is composed of a metal core sandwiched between two FGM skin layers. In

The thermal properties of paraffin wax were upgraded by utilizing rice husk-derived graphene nanoparticles. In terms of performance, the stability of NPEPCM is an essential aspect. The stability of REPCM is checked using surfactants (CTAB, SDBS, SDS) and sonication time. An increment in the thermal conductivity of paraffin wax was perceived. Maximum conductivity of 0.59 Wm−1K−1 was achieved at 304 K

This numerical study investigates the effect of a magnetic field and discrete thermo-solutal source on steady double-diffusive mixed convection in a double-sided cavity filled with liquid potassium alloy using the finite volume method. The discrete thermo-solutal source is fixed on the cavity left wall, with three locations considered in three cases. In contrast, the right vertical wall is maintained

This paper focuses on the experimental characterization of horizontal, spiral heat exchangers used for heat recovery from sewage pipes. Such non-intrusive heat exchanger configurations are appealing for this application, but they often exhibit reduced heat exchange performances compared to more compact designs. To compare the performance of this configuration with that of an ideal counter-flow heat

The two-dimensional flow of Sutterby-Casson fluid flow over an exponentially curved sheet is considered. Incompressible and steady flow is taken into account. The magnetic and electric fields are ignored due to the small Reynolds number in the flow assumptions. Magnetic and chemical dipoles are considered at stretchable curved sheet. Heat generation and slip phenomena have been considered in the present

Metal implants are typically used in medicine and body modifications to repair or replace damaged tissues, bones, or organs. However, they can cause complications, such as pain, inflammation, and tissue damage, when exposed to strong electromagnetic fields. This study is performed to examine the effect of high-intensity near-field electromagnetic exposure on the thermal effects of metal implants in

In this paper, a comprehensive technical and economic modeling of a trigeneraion system based on a gas engine named EF7 is presented. The innovation is presenting a differential model with high accuracy which considers the effects of spark timing in half-load and full-load modes on the system technical performance, including specific fuel consumption, and the economic performance of the system, including

Compressed air foam (CAF) is widely used as a high-performance extinguishing agent for liquid fuel fire. In this work, the effects of initial fuel surface temperatures (50–80 °C) on the drainage and evaporation of CAF were studied experimentally. It was found that at the same foam mass, the drain rate is positively correlated to the initial fuel surface temperature. Furthermore, the drainage and evaporation