Numerical analysis of heat transfer in the exhaust gas flow in a diesel power generator

An analysis of a heat transfer process during exhaust gas flow through two boiler draughts connected in the reversing chamber is presented. The article shows the main differences in the exhaustgas flowthrough the boiler construction when heating boiler works with different levels of heating power.The aim of the proposed research is defining a character of a flow and a heat transfer process depending onthe horizontal and vertical position of boiler draughts.

Download Full-text

Numerical Analysis of Dual-Flow Fields in Mini-TBM for Chinese LiPb Experimental Loop Dragon-IV

18th International Conference on Nuclear Engineering: Volume 6 ◽

10.1115/icone18-30174 ◽

2010 ◽

Author(s):

Wei-hua Wang ◽

Zhi-qiang Zhu ◽

Qun-ying Huang ◽

Xin-zhen Ling ◽

Jin-ling Li

Keyword(s):

Heat Transfer ◽

Numerical Analysis ◽

Gas Flow ◽

Flow Fields ◽

Three Dimensions ◽

Temperature Fields ◽

Liquid Lithium ◽

Flow And Heat Transfer ◽

Helium Gas ◽

Joint Contribution

Mini-TBM will be tested in chinese LiPb experimenttal loop Dragon-IV to validate the thermal-hydraulic effect of DFLL-TBM, such as dual-flow fields heat transfer, temperature fields, velocity fields, flux distribution of liquid lithium lead and helium gas. It is difficult to measure the detailed dual-flow fields of liquid metal LiPb and helium gas in mini-TBM. Three dimensions numerical analysis of the LiPb and helium gas flow and heat transfer in Mini-Test Blanket Module (TBM) therefore has been carried out using the CFD code FLUENT. The detailed dual-flow fields, which include temperature, velocity, pressure and heat transfer of liquid LiPb and helium gas, are presented to support for the test of mini-TBM, and to supply more robust database and make a significant joint contribution to the future TBM testing in EAST and ITER, and also optimize and improve the design of DFLL-TBM system for ITER.

Download Full-text

Numerical Analysis of Heat Transfer and Gas Flow in PEM Fuel Cell Ducts by a Generalized Extended Darcy Model

International Journal of Green Energy ◽

10.1081/ge-120027883 ◽

2004 ◽

Vol 1 (1) ◽

pp. 47-63 ◽

Cited By ~ 17

Author(s):

Jinliang Yuan ◽

Bengt Sundén

Keyword(s):

Heat Transfer ◽

Fuel Cell ◽

Numerical Analysis ◽

Gas Flow ◽

Pem Fuel Cell ◽

Darcy Model

Download Full-text

A 1D–3D Approach for Fast Numerical Analysis of the Flow Characteristics of a Diesel Engine Exhaust Gas

Machines ◽

10.3390/machines9100239 ◽

2021 ◽

Vol 9 (10) ◽

pp. 239

Author(s):

Kyeong-Ju Kong

Keyword(s):

Diesel Engine ◽

Numerical Analysis ◽

Gas Flow ◽

Emission Control ◽

Flow Characteristics ◽

Exhaust System ◽

Exhaust Gas ◽

Analysis Method ◽

Numerical Analysis Method ◽

Control Devices

It is necessary to analyze the intake/exhaust gas flow of a diesel engine when turbocharger matching and when installing emission control devices such as exhaust gas recirculation (EGR), selective catalytic reduction (SCR), and scrubbers. Analyzing the intake/exhaust gas flow using a 3D approach can use various analytical models, but it requires a significant amount of time to perform the computation. An approach that combines 1D and 3D is a fast numerical analysis method that can utilize the analysis models of the 3D approach and obtain accurate calculation results. In this study, the flow characteristics of the exhaust gas were analyzed using a 1D–3D coupling algorithm to analyze the unsteady gas flow of a diesel engine, and whether the 1D–3D approach was suitable for analyzing exhaust systems was evaluated. The accuracy of the numerical analysis results was verified by comparison with the experimental results, and the flow characteristics of various shapes of the exhaust system of a diesel engine could be analyzed. Numerical analysis using the 1D–3D approach was able to be computed about 300 times faster than the 3D approach, and it was a method that could be used for research focused on the exhaust system. In addition, since it could quickly and accurately calculate intake/exhaust gas flow, it was expected to be used as a numerical analysis method suitable for analyzing the interaction of diesel engines with emission control devices and turbochargers.

Download Full-text