scholarly journals Computational fluid dynamic (CFD) modelling of floating photovoltaic cooling system with loop thermosiphon

2019 ◽  
Author(s):  
Bayu Sutanto ◽  
Yuli Setyo Indartono
Keyword(s):  
Computational Fluid Dynamic ◽  
Cooling System ◽  
Fluid Dynamic ◽  
Cfd Modelling

Computational fluid dynamic modelling of wastewater ponds to improve design

1995 ◽  
Vol 31 (12) ◽  
pp. 111-118 ◽  
Author(s):  
M. G. Wood ◽  
P. F. Greenfield ◽  
T. Howes ◽  
M. R. Johns ◽  
J. Keller
Keyword(s):  
Computational Fluid Dynamic ◽  
Fluid Dynamic ◽  
Dynamic Modelling ◽  
Design Tool ◽  
Meat Industry ◽  
Cfd Modelling ◽  
Improve Design ◽  
Traditional Design ◽  
Flow Mixing ◽  
New Generation

Wastewater ponds are a popular treatment alternative in Australia, especially in the meat industry. However, increasingly stringent Australian environmental legislation is raising questions about the continued viability of ponds. Traditional design methods do not address the hydrodynamic problems (i.e. short-circuiting) nor can they predict the effects of measures like baffles or repositioning inlets or outlets to improve performance. This is because the microscale interactions between the fluid and solids, and the biological reactions are ignored. This paper presents a tool -- computational fluid dynamic (CFD) modelling and explores its potential as a new design tool for wastewater ponds. FIDAP, a finite element CFD program, is one of the new generation of commercial CFD packages available. This program has been used to qualitatively investigate the hydrodynamics of four pond systems. These models are limited to 2-dimensional (D), steady-state simulations in a laminar flow regime. They form the first step in the process to address the microscale fluid flow, mixing and biology in wastewater ponds. Considerably more modelling and validation work is yet to be done.

Computational Fluid Dynamic Analysis for Modified Steam Duct in Air Cooled Condenser

2011 ◽  
Vol 110-116 ◽  
pp. 4246-4254
Author(s):  
Fatemehsadat Salehi ◽  
Ramin Haghighi Khoshkho
Keyword(s):  
Pressure Drop ◽  
Computational Fluid Dynamic ◽  
Power Plants ◽  
Cooling System ◽  
Tube Bundle ◽  
Fluid Dynamic ◽  
Steam Flow ◽  
Computational Fluid Dynamic Analysis ◽  
Velocity Form ◽  
Turbine Exhaust

Cooling system is a subsystem of a power plan that has an indispensable effect on efficiency of power plant. Air Cooled Condenser (ACC) system as a cooling system, is usually used in many power plants. Steam duct as a part of ACC conveys the steam flow with high velocity form steam turbine exhaust to head of tube bundle which is located at height of 25 to 30 meters. In this paper, pressure drop in steam duct is calculated using computational fluid dynamic method. Then, in order decrease pressure drop and consequently increase ACC efficiency, steam duct configuration is modified. The steam flow is modeled as an incompressible, turbulent and single phase flow. The solution strategy is based on SIMPLE and Segregated Implicit algorithm and the k-ε RNG model for turbulence are employed. The second order upwind differencing scheme are applied to discrete governing equations. Numerical results confirm reducing of total pressure drop in modified diffuser comparing with primary geometry.

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