Analysis of atmospheric behavior of PCDDs/PCDFs by a one-compartment box model (original) (raw)

F102 Multi-scale numerical modelling of CO2 diffusion in semi-enclosed bays

The Proceedings of the National Symposium on Power and Energy Systems

To quantify the risk and impact of CO2 seepage to the marine ecosystem , the Quantifying and Monitoring Potential Ecosystem lmpacts ofGeological Carbon Storage project is now undergoing in a bay in Scotland. In advance of the field expcriment of this pr〔) jec も we conducted the numerical simulatien of CO2 seepage, From

1121 The effects of frame and inlet sizes of electronic casing-mounted cooling fans on their P-Q characteristics

Nenji Taikai koen ronbunshu, 2008

This paper describes the effects of frame and inlet sizes of an electronic casing on the cooling fan performance. The performance of air-cooling fans is defined by their P-Q characteristics. Recent studies report that P-Q curves of cooling fans depend considerably on their operational environments. It is impossible for accurate CFD (Computational Fluid Dynamics) analyses to be performed on the thermal design of electronic equipments, including fans. In this study, we measured a fan performance in some frames and explored effects of environment for their P-Q characteristics, especially effects from area of frame and cooling air inlet sizes. From experimental results, it was found that the fan P-Q characteristics, especially flow rate were affected strongly by inlet sizes.

Continuous Ground Observation of Particulate Matter on Sakurajima, Kyushu, Japan

2014

A continuous ground observation of particulate matter with a dust meter has been made on Sakurajima. In general, coarse particles are dominant in Sakurajima. Particulate matter concentration varied with the amount of volcanic ash emission and the wind direction. It is considered that the major origin of particulate matter observed in Sakurajima is the volcanic ash of Sakurajima volcano.A continuous ground observation of particulate matter with a dust meter has been made on Sakurajima. In general, coarse particles are dominant in Sakurajima. Particulate matter concentration varied with the amount of volcanic ash emission and the wind direction. It is considered that the major origin of particulate matter observed in Sakurajima is the volcanic ash of Sakurajima volcano

Study on Performance Prediction Model of Cooling Fans for Thermal Design of Electronic Equipment (Modeling and Evaluation of Effects from Electronic Enclosure and Inlet Sizes)

IEEE Transactions on Software Engineering, 2010

This study describes the fan performances such as the P-Q curve and the maximum flow rate at various environmental conditions where the cooling fan is installed. Especially, this paper focuses on the relationship between the fan performance and the configuration factors such as the electronic enclosure. At the experiments, it was observed that the pressure difference was increased in the enclosure by the effects of a wall. On the other hand, the flow rate by the fan supply was decreased by the existence of the narrow inlet. When an inlet area of the enclosure became smaller than double of the fan flow area, the flow rate was decreased. In addition, it was observed that the maximum flow rate depended on the opening area ratio. Finally, a model for predicting pressure rise and flow rates which was occurred in the enclosure was proposed. In addition, the thermal analysis for the PCB model set in the enclosure is carried out using the proposed prediction model.

DSMC-QCT Analysis of CO Internal Relaxation and Dissociation by CO-O Collisions

JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

The coupled rotation-vibration-dissociation analysis of carbon monoxide is conducted by the stateresolved direct simulation Monte-Carlo (DSMC) model incorporated with a quasi-classical trajectory (QCT) model for computation of inter-molecular collision dynamics. The potential energy surface for the triatomic system is described by the London-Eyring-Polanyi-Sato (LEPS) potential, which is determined from the spectroscopic constants of diatomic molecules and the results of ab initio electronic structure calculations. A comparison is made between the numerical results and the experimental data in terms of the macroscopic relaxation parameters and the dissociation rate coefficients at moderate temperatures. Finally, the relaxation parameters and the dissociation rate coefficients at extremely high temperatures where the experimental data are unavailable have been estimated by the DSMC-QCT calculations.