scholarly journals Simulasi Unjuk Kerja Termal Dan Pressure Drop Kolektor Surya Pelat Datar Aliran Serpentine Menggunakan Metode CFD

MECHANICAL ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 23
Author(s):  
Ahmad Yonanda ◽  
Amrizal Amrizal ◽  
Amrul Amrul
Keyword(s):  
Pressure Drop ◽  
Computational Fluid Dynamic ◽  
Fluid Dynamic

Untuk mengetahui karakteristik unjuk kerja kolektor surya ini dapat digunakan metode CFD (Computational Fluid Dynamic). CFD memberikan kemudahan untuk menganalisis karakterisrik aliran fluida yang berkaitan dengan distribusi temperatur dan tekanan yang terjadi. Tujuan penelitian ini adalah menganalisis karakteristik unjuk kerja termal dan pressure drop pada kolektor surya pelat datar menggunakan metode CFD. Langkah-langkah yang dibutuhkan dalam proses simulasi CFD adalah: desain dan name selection geometri, meshing, pemilihan metode radiasi, pemilihan jenis material dan input kondisi batas. Proses iterasi simulasi ditunjukkan oleh grafik “residual” yang konvergen dengan hasil simulasi berupa kontur temperatur dan tekanan. Kemudian proses validasi dilakukan terhadap hasil simulasi dengan cara membandingkannya dengan data eksperimen. Langkah selanjutnya mensimulasikan unjuk kerja kolektor surya berdasarkan variasi laju aliran massa fluida dan variasi jarak antara pipa (W). Hasil penelitian ini menunjukkan bahwa peningkatan laju aliran massa fluida sebesar 0,005 kg/s (dalam range 0,005 - 0,02 kg/s) mengakibatkan temperatur keluar fluida kerja akan mengalami penurunan sekitar 2°C. Sementara itu penggunaan jarak antara pipa (W) 40 mm jika dibandingkan dengan jarak antara pipa (W) 80 mm akan meningkatkan temperatur keluar fluida kerja sebesar 3,9°C. 

scholarly journals ANALISA PROFIL ALIRAN FLUIDA CAIR DAN PRESSURE DROP PADA PIPA L MENGGUNAKAN METODE SIMULASI COMPUTATIONAL FLUID DYNAMIC (CFD)

2019 ◽  
Vol 8 (1) ◽  
pp. 97
Author(s):  
Jalaluddin Jalaluddin ◽  
Saiful Akmal ◽  
Nasrul ZA ◽  
Ishak Ishak
Keyword(s):  
Pressure Drop ◽  
Computational Fluid Dynamic ◽  
Fluid Dynamic

Penelitian ini bertujuan untuk Mengetahui hasil analisa aliran fluida yang terdapat dalam pipa L, Mengetahui jenis pola aliran yang terbentuk di dalam pipa L, dan Mengetahui berapa besar Pressure drop yang terjadi. Penelitian ini dilakukan dengan memvariasikan laju alir dan jenis fluida.. Pada penelitian ini dengan laju aliran 14 ton/jam menggunakan fluida air diperoleh bilangan reynold sebesar 35.252,5, penurunan tekanan ΔP sebesar 2,78801 Bar. Pada fluida amonia diperoleh  bilangan reynold sebesar 160.720,  penurunan tekanan ΔP sebesar 0,28127 Bar. Pada fluida solar diperoleh  bilangan reynold sebesar 16.999,2,  penurunan tekanan ΔP sebesar 3,16401 Bar. Pada fluida bensin diperoleh  bilangan reynold sebesar 90.199,7,  penurunan tekanan ΔP sebesar 1,84231 Bar. Pada fluida etilen glikol diperoleh  bilangan reynold sebesar 1.652,26,  penurunan tekanan ΔP sebesar 4,49503 Bar Dari hasil tersebut dimana semakin besar viskositas dari jenis fluida maka semakin tinggi penurunan tekanan (pressure drop) dan semakin kecil nilai Reynold numbernya.

scholarly journals Pressure-Drop Coefficients for Cushioning System of Hydraulic Cylinder With Grooved Piston: A Computational Fluid Dynamic Simulation

Energies ◽  
2017 ◽  
Vol 10 (11) ◽  
pp. 1704 ◽  
Author(s):  
Robert Castilla ◽  
Ignasi Alemany ◽  
Antonio Algar ◽  
Pedro Gamez-Montero ◽  
Pedro Roquet ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Dynamic Simulation ◽  
Computational Fluid Dynamic ◽  
Fluid Dynamic ◽  
Computational Fluid Dynamic Simulation ◽  
Hydraulic Cylinder

CFD Simulation of Gas-Solid Flow in Dense Phase Bypass Pneumatic Conveying Using the Euler-Euler Model

2010 ◽  
Vol 26-28 ◽  
pp. 1190-1194 ◽  
Author(s):  
Y. Wang ◽  
K.C. Williams ◽  
M.G. Jones ◽  
B. Chen
Keyword(s):  
Pressure Drop ◽  
Simulation Model ◽  
Computational Fluid Dynamic ◽  
Cfd Simulation ◽  
Fluid Dynamic ◽  
Pneumatic Conveying ◽  
Dense Phase ◽  
Pipe Length ◽  
Initial Design ◽  
Euler Model

The pressure drop predictions across a bypass pipeline in dense phase pneumatic conveying were investigated numerically. The simulation was conducted using the commercial Computational Fluid Dynamic (CFD) software Fluent with the Euler- Euler model accounting for four-way coupling. Experiments and calculations were conducted using flyash powder conveyed in a horizontal pipeline. The influence of the pipe length on pressure drop prediction was also investigated. The results indicate that pressure prediction of the CFD simulation model for a bypass pipe is promising. The conclusion is that this investigation can offer improved insight and initial design modelling capability for bypass pneumatic conveying systems.

Computational Fluid Dynamic Analysis of Gas Flow Characteristics in a New Type of Scrubber Based on Mechanical Materials

2013 ◽  
Vol 700 ◽  
pp. 119-122
Author(s):  
Yi Gang Luan ◽  
Zheng Heng Zhao ◽  
Peng Fei Liu
Keyword(s):  
Pressure Drop ◽  
Dynamic Analysis ◽  
Computational Fluid Dynamic ◽  
Gas Flow ◽  
Fluid Dynamic ◽  
Symmetry Plane ◽  
Flow Characteristics ◽  
Wire Mesh ◽  
Computational Fluid Dynamic Analysis ◽  
New Type

In this paper, a new type of vertical scrubber is designed and a computational fluid dynamic analysis of gas flow through the device is presented. The simulation results are obtained by FLUENT 6.3. Through the two-dimension simplification of mist-mat, the resistance characteristic of the wire-mesh is gained. To simulate the gas flow of the scrubber, mist-mat is replaced by porous media. Through the analysis of simulate results, flow characteristic and pressure drop of the scrubber is obtained. Additionally, CFD analysis results show the entrance direction of the gas in vane inlet symmetry plane is benefit to avert severely velocity impulse and scrubber’s pressure drop rises with the growth of the eliminator’s velocity.

scholarly journals Simulasi Aliran Kolom Absorpsi untuk Proses Penyerapan CO2 dengan Absorben Air menggunakan Computational Fluid Dynamics (CFD)

2019 ◽  
Vol 7 (1) ◽  
pp. 1
Author(s):  
Novi Sylvia ◽  
Anisa Anisa ◽  
Lukman Hakim
Keyword(s):  
Carbon Dioxide ◽  
Pressure Drop ◽  
Flow Rate ◽  
Computational Fluid Dynamic ◽  
Fluid Dynamic ◽  
Absorption Column ◽  
A Value ◽  
Carbon Dioxide Pressure ◽  
Computational Fluid Dynamics Cfd ◽  
Carbon Dioxide Co2

To increasing the heating value of biogas and natural gas on  industry needed a way to separate the carbon dioxide (CO2) use technology absorption. Many methods have been used to absorb the CO2 that has been researched, but most still use the absorption process in batch system. Therefore, this research will be conducted on the process of absorption of carbon dioxide (CO2) and water (H2O) will be simulated using Computational Fluid Dynamic (CFD). This research aims to test the performance of column absorption absorption on the process of carbon dioxide (CO2) and uses Autodesk Inventor  2016 and Fluent 16.0 to model the absorption and the pressure drop on the absorption column. This research was conducted with varying influence of the flow rate of water and carbon dioxide by comparison 2:1, i.e. CO2 117.75; 141.3 ;188.4 liters/min  and  H2O 235.5; 282.6 and 376.8 liters/minute.The results obtained show that the Percent of the maximum absorption i.e. 45.89% of flow rate of CO2 occurs at 117.75 liters/minute and H2O at 235.5 litres/minute, while the percent the minimum absorption i.e. 28.32% occurred at a flow rate of CO2 188.4 liters/minute and H2O 376.8 liters/minute. The highest pressure drop occurs at 188.4 liters/minute flow rate of CO2 and H2O 376.8 liters/minute, with a value of ∆P 0.66 atm, while the lowest pressure drop occurs at 177.75 liters/minute of CO2 and H2O at 235.5 litres/minute with the value of ∆P 0.17 atm.Key words:    absorption, water, Computational Fluid Dynamic, carbon dioxide, pressure drop

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.

Validierungsmethodik eines Computational Fluid Dynamic Modells des aortalen Blutflusses

2008 ◽  
Vol 180 (S 1) ◽  
Author(s):  
M Kostrzewa ◽  
D Hazer ◽  
P Kurz ◽  
B Radeleff ◽  
W Hosch ◽  
...  
Keyword(s):  
Computational Fluid Dynamic ◽  
Fluid Dynamic
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