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... With the transformation from individual energy systems to integrated energy systems (IES), equivalent circuit IES modeling is developed to represent the heat and electricity consistently for coordinated analysis, control and optimization. However, physical properties of equivalent parameters are a mismatch, and the key operation characteristics, including dynamics and coupling, have not yet been f ...
heattransfer, etc ; carbon dioxide; energy; gravity; mass transfer; serpentine; Show all 6 Subjects
Abstract:
... The combined effect of gravitational buoyancy, centrifugal force and centrifugal buoyancy on the heat transfer of supercritical CO₂ in a serpentine micro-tube under different flow directions is numerically studied. The comprehensive heat transfer performance in the four flow directions is vertical upward flow (VU), horizontal flow vertical bend (HV), horizontal flow horizontal bend (HH) and vertic ...
heattransfer, etc ; energy; microwave treatment; optics; porous media; temperature; Show all 6 Subjects
Abstract:
... Cylindrical containers are commonly used in microwave food processing applications. However, due to the shape effect, microwave energy mainly focuses in the center of the sample within the container, leading to a nonuniform temperature gradient between the inner and outer layers of the sample. Employing a lossy container may be an effective method to address this issue because the heat conduction ...
heattransfer, etc ; carbon; economic feasibility; energy; fossil fuels; heat exchangers; markets; models; Show all 8 Subjects
Abstract:
... The goal of this research is to develop a flexible, simple, and accurate coupled system model for nuclear combined heat and power cycle (CHP) to investigate various heat-source applications of a small modular reactor (SMR) based on off-design component models. A CHP heat exchanger system model was developed and coupled with the SMR secondary system model for a typical SMR-CHP analysis. The coupled ...
heattransfer, etc ; electric potential difference; electric power; foams; humans; wind speed; China; Show all 7 Subjects
Abstract:
... With the popularity and application of Autonomous-rail rapid transit in China, the status of drivers has also attracted more attention to reducing the number of accidents on complex urban roads. The previously used sensors to monitor driver status require external power, limiting the further development and application of the sensor. This paper proposes a sensor energy self-circulation system base ...
heattransfer, etc ; distillation; emulsions; energy; hexadecane; sodium dodecyl sulfate; temperature; water vapor; Show all 8 Subjects
Abstract:
... Membrane distillation (MD) is attractive for water recovery from surfactant-stabilized oil-in-water emulsion due to its unique characteristics. To address the membrane fouling and wetting issues, a novel hydrophilic-omniphobic-hydrophilic sandwich-like membrane (PFZP) was firstly developed. Top PDA skin layer induced the hydration shell facing feed, which endowed membrane with high energy barriers ...
heattransfer, etc ; carbon; case studies; electricity; models; prices; seasonal variation; temperature; thermal energy; Show all 9 Subjects
Abstract:
... The optimal design of borehole thermal energy storage systems can ensure their techno-economical goals are met. Current design optimization methods either employ detailed modelling unsuitable for numerical optimization or use simplified models that do not consider operational conditions. This paper proposes an optimization-oriented model and a non-convex optimization formulation that, differently ...
heattransfer, etc ; cooling; energy; gravity; liquids; mass transfer; specific heat; surface tension; viscosity; Show all 9 Subjects
Abstract:
... The supercritical-CO₂ (S–CO₂) cooler is one of the main components in S–CO₂ power system. This work aims at revealing the cooling mechanism of S–CO₂ under wide working conditions to assist the S–CO₂ cooler design. The pseudo-condensation is proposed with the analogy between supercritical cooling and subcritical condensation. From the pseudo-condensation and the traditional turbulent field analysis ...
heattransfer, etc ; carbon; electromagnetic interference; electron transfer; electronics; heat tolerance; nanocomposites; polyurethanes; thermal conductivity; Show all 9 Subjects
Abstract:
... The rapid innovation of flexible smart electronics has increased the demand for flexible thermally conductive films with the high performance of electromagnetic interference shielding (EMI). This study focuses on graphene nanoplatelets/polyurethane (GnP/PU) films that were fabricated utilizing the solution casting approach. The stretching-induced alignment method was then used to align the GnP she ...
heattransfer, etc ; chemical analysis; economic analysis; electricity; equipment; exergy; hydrogen bonding; quantum mechanics; steam; temperature; Show all 10 Subjects
Abstract:
... A screening strategy was established for obtaining an optimal working fluid (R1234yf) based on quantum chemical analysis. The weak hydrogen bond interactions of R1234yf enhanced the performance of the organic Rankine cycle. The proposed process produced 49.28 MW of electricity and 0.5 MPa of steam. The optimal process was evaluated by multifactor analysis of exergy, economic, and exergoenvironment ...
heattransfer, etc ; Reynolds number; catalysts; energy; models; particle size distribution; specific heat; temperature; thermal conductivity; transportation; viscosity; Show all 11 Subjects
Abstract:
... The methanol-to-olefin (MTO) process is commercialized worldwide, yet the understanding of in-furnace phenomena is still lacking. Accordingly, this work explores the multiphase flow and thermochemical characteristics in a commercial-scale MTO fluidized bed reactor using a three-dimensional multiphase particle-in-cell model. After model validations, the intrinsic relationship of solid transportatio ...
heattransfer, etc ; aerogels; carbon; carbon nanotubes; energy conversion; molecular dynamics; paraffin wax; phase transition; polymerization; pyrroles; thermal conductivity; thermal energy; vapors; vibration; Show all 14 Subjects
Abstract:
... Phase change materials (PCMs) have been widely investigated as promising thermal management materials due to their high thermal storage capacity, satisfactory heat transfer rate and multi-responsive energy conversion and storage characteristics. In this work, a shape-stabilized solar-/electro- responsive thermal energy capture and storage system is proposed involving polypyrrole (PPy)-deposited ca ...
heattransfer coefficient, etc ; ascorbic acid; color; convection; finite element analysis; glass; lycopene; models; pasteurization; specific heat; temperature profiles; thermal conductivity; thermal degradation; tomatoes; Show all 14 Subjects
Abstract:
... Pasteurization of crushed tomato in glass bottles was evaluated using a multiphysics model, aiming to understand the temperature profiles and quality losses during the heating and cooling stages of the process. In order to rigorously simulate the pasteurization process, a finite element model was built using experimentally measured product and heat transfer parameters (thermal conductivity, densit ...
heattransfer; heattransfer coefficient, etc ; energy; horses; Show all 4 Subjects
Abstract:
... Modern lean-burn combustors generate aggressive swirling flow at the entrance of high-pressure turbine nozzle guide vane (NGV), and lead to cooling performance deterioration of the NGV film cooling system. Improving the cooling performance of NGV becomes a delicate task for the designers. In this study, micro-scale ribs with novel arrangement method were applied to improve the cooling effectivenes ...
heattransfer; heattransfer coefficient, etc ; liquids; magnetic fields; slugs; Show all 5 Subjects
Abstract:
... Bubble-slug flows are an important two-phase flow pattern known for their superior transport characteristics, which predominantly depend on the phase distribution (bubble and slug lengths). In the present work, it is shown that the thermal transport characteristics of such flows can be substantially enhanced and tuned as per requirement by utilizing ferro-nanocolloids or ferrofluids as the primary ...
heattransfer; heattransfer coefficient, etc ; capillarity; power generation; silicon; surface roughness; Show all 6 Subjects
Abstract:
... Surface engineering has been leveraged by researchers to enhance boiling heat transfer performance, with benefits ranging from improved thermal management to more efficient power generation. While engineered surfaces fabricated using cleanroom processes have shown promising boiling results, scalable methods for surface engineering are still limited despite most real-world industry-scale applicatio ...
heattransfer; heattransfer coefficient, etc ; air; exergy; mass flow; roughness; solar heaters; Show all 7 Subjects
Abstract:
... The major challenge faced in heat transfer augmentation in roughened solar air duct is the formation of viscous sublayer near heat transferring surface. The present investigation uses main air supply flow under roughened duct mounted with transverse wedge shaped roughened absorbers for the heated air jet delivery. This technique is prolific as it provides the ambient cool air to the entire absorbe ...
heattransfer; heattransfer coefficient, etc ; electronic equipment; energy; mass transfer; models; temperature; Show all 7 Subjects
Abstract:
... With the integration development of electronic equipment, a more compact and higher efficiency heat dissipation system is required to meet its cooling demands. In this work, the design of ribbed channel heat sink in a limited volume to maximize its heat transfer capacity is analyzed. Two-phase flow boiling performance of rib diameters ranging from D = 1–10 mm is characterized using the Mixture mul ...
heattransfer; heattransfer coefficient, etc ; carbon dioxide; databases; neural networks; normal distribution; Show all 6 Subjects
Abstract:
... The heat transfer characteristics of carbon dioxide (R744) as a natural and safe refrigerant are quite different from the other refrigerants due to the CO2 unique physical properties. So, it is essential to develop accurate general models for predicting the heat transfer coefficient (HTC) of CO2 condensation inside smooth tubes. In this study, an extensive experimental databank for the CO2 refrige ...
heattransfer; heattransfer coefficient, etc ; air; fluidized beds; hydrodynamics; microencapsulation; phase transition; sand; Show all 8 Subjects
Abstract:
... This paper presents an experimental study on the heat transfer and hydrodynamic of a concentric double-pipe gas-solid pulsed fluidized bed filled in outer tube with microencapsulated phase change material and inner tube with sand. The effect of flow velocity, frequency and bed height are investigated on the heat transfer. Experiments are carried out at frequency in the range of 1 to 5Hz with the b ...