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The Tools
Published in Tina Kanti Agustiady, Elizabeth A. Cudney, Building a Sustainable Lean Culture, 2023
Tina Kanti Agustiady, Elizabeth A. Cudney
Just-in-TimePull – There are three basic types of pull system; replenishment pull, sequential pull, and mixed pull system with elements of the previous two combined (see glossary at end). In all three cases, the important technical elements for systems to succeed are as follows: (1) flowing product in small batches (approaching one piece flow where possible); (2) pacing the processes to takt time (to stop overproduction); (3) signaling replenishment via a kanban signal; (4) leveling of product mix and quantity over time.Flow – A continuous flow process is a method of manufacturing that aims to move a single unit in each step of a process, rather than treating units as batches for each step.Takt time – Takt time is the rate at which work must be performed for customer demand to be met on time.
Introduction and Basic Concepts
Published in Kavati Venkateswarlu, Engineering Thermodynamics, 2020
A process takes place when a system undergoes a change of state or an energy transfer takes place at a steady state. Figure 1.5 shows the process in which a system undergoes a change of state from 1 to 2. A process may be a flow process or a non-flow process. A flow process is the one in which mass enters and leaves through the boundary of a control volume (open system). Example: A certain mass of working fluid (water) enters a steam power plant and undergoes a change of state in the flow process. In an open system, it is necessary to take account of the work delivered from the surroundings to the system at the entry to cause the mass to enter, and also of the work delivered from the system at surroundings to cause the mass to leave, as well as any heat or work crossing the boundary of the system. For example, a substance that is being heated in a closed cylinder undergoes a non-flow process. In a steady flow process, a certain quantity of mass enters the boundary from surroundings at entry and an equal mass leaves the boundary at the exit so that the total mass of the system remains constant.
New insights into generation of highly controllable monodisperse high-throughput microdroplets in a T-junction microchannel with step structure
Published in Journal of Dispersion Science and Technology, 2021
The numerical simulation of this paper is based on the finite element software COMSOL Multiphysics5.0, using the level-set method to carry out the numerical simulation. For the purpose of this study, we assume the following conditions:Ignore the gravity of the fluid on a microscopic scale.The two-phase flow is incompressible laminar flow.The system temperature is 20 °C and there is no energy exchange with the outside world.No chemical reaction occurs in the flow process, and the physical properties of the two-phase fluid are constant.
CFD simulation analysis of two-dimensional convergent-divergent nozzle
Published in International Journal of Ambient Energy, 2020
R. Ramesh Kumar, Yuvarajan Devarajan
Applications are used in CFD Combination of flow and transfer of heat dissipated in industrial applications likes heat exchanger, blowers, piping, boilers, etc.Aerodynamic structures, aerospace vehicles, aircraft machi-nes, etc.Thermal coating, nano-particles, film factors in material testing applications.Flow process to be used in power generations.Integrated circuit manufacturing decades to produce in the field of CVD (chemical vapour deposition)
Exergy analysis of combined cycle power plant with carbon capture and utilization
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2020
Thermodynamic modeling based on the second law of thermodynamics involving Brayton cycle, Rankine cycle, Methanation unit, and PEM electrolyzer has been considered for carrying out exergy analysis. Methodology of this study includes the use of mathematical equations governing different constituent components in the cycle as per sequence of their arrangement. Major assumptions considered for thermodynamic analysis are given as under: Steady state flow process is assumed for the entire cycle.Specific heat of air and combustion products are taken as a function of temperature.Dead state conditions are P0 = 1.3125 bar and T0 = 298.15 K.Heat loss from the plant is negligible.