Influence of inlet velocity of air and solid particle feed rate on holdup mass and heat transfer characteristics in cyclone heat exchanger

Mothilal, T.; Pitchandi, K.

doi:10.1007/s12206-015-0950-z

Cited by 32 publications

(16 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The continuity and momentum equation for steady and incompressible flow is given in Eq. (1 & 2) (Karagoz and Kaya 2007;Mothilal and Pitchandi 2015).…”

Section: Governing Equationsmentioning

confidence: 99%

“…The main assumption followed in DPM is lower volume fraction (10 -12 %) and all particles are considered as spherical. Solid particles loading in cyclone heat exchanger are very small (3 -5 %) (Fassani F and Goldstein 2000, Shukla et al 2011and Mothilal and Pitchandi 2015 which don't affect the gas phase (one way coupling). The interaction between the particles in a flow is neglected and their effects are calculated by force balancing Eq.…”

Section: Discrete Phase Model (Dpm)mentioning

confidence: 99%

“…The interaction between the particles in a flow is neglected and their effects are calculated by force balancing Eq. (5) (Mothilal and Pitchandi, 2015).…”

Section: Discrete Phase Model (Dpm)mentioning

confidence: 99%

“…Mesh was generated using Hybrid mesh elements (Karagoz and Kaya, 2007) in cyclones by using ANSYS ICEM CFD (Mothilal and Pitchandi, 2015) software. Mesh consists of 197789 elements, 25030 nodes was generated in cyclone heat exchanger shown in Fig.…”

Section: Mesh Generation and Boundary Conditionsmentioning

confidence: 99%

See 3 more Smart Citations

CFD and Statistical Approach for Optimization of Operating Parameters in a Tangential Cyclone Heat Exchanger

Mothilal¹,

Pitchandi²,

Velukumar³

et al. 2018

JAFM

Self Cite

View full text Add to dashboard Cite

Present work optimizes the operational parameters such as solid particle diameter, inlet air velocity and inlet air temperature on heat transfer rate by Taguchi method. Operational parameters play an important role in the performance of cyclone heat exchanger thus the parameter optimization is deemed important. The parameters have been analyzed under varying solid particle diameter (300 and 400 µm), inlet air temperature (323, 373, 423 and 473 K) and inlet air velocity (5, 10, 15 and 20 m/s). Results of heat transfer rate by varying the operational parameters have been found from Computational Fluid Dynamics (CFD) software Ansys Fluent. Orthogonal array of Taguchi, the signal-to-noise ratio and analysis of variance have been employed to found the optimal parameter values and the effect of parameters on heat transfer rate. Mixed level factor and L32 array is chosen for the design of analysis in Taguchi. Result of statistical analysis shows that the developed approach yields worthy results when comparing with predicted simulation values with confidence level of 99.5%. Taguchi analysis reveals that optimized levels of parameters are 300 µm, 473 K & 20 m/s for solid particles diameter, inlet air temperature and inlet air velocity respectively. Confirmation test was conducted in simulation and experiment for optimized parameters and result shows that maximum heat transfer rate was obtained with optimized parameter among the chosen operational parameters.

show abstract

“…The continuity and momentum equation for steady and incompressible flow is given in Eq. (1 & 2) (Karagoz and Kaya 2007;Mothilal and Pitchandi 2015).…”

Section: Governing Equationsmentioning

confidence: 99%

Section: Discrete Phase Model (Dpm)mentioning

confidence: 99%

“…The interaction between the particles in a flow is neglected and their effects are calculated by force balancing Eq. (5) (Mothilal and Pitchandi, 2015).…”

Section: Discrete Phase Model (Dpm)mentioning

confidence: 99%

Section: Mesh Generation and Boundary Conditionsmentioning

confidence: 99%

See 2 more Smart Citations

CFD and Statistical Approach for Optimization of Operating Parameters in a Tangential Cyclone Heat Exchanger

Mothilal¹,

Pitchandi²,

Velukumar³

et al. 2018

JAFM

Self Cite

View full text Add to dashboard Cite

show abstract

“…The effects of the particle size, inlet velocity and particle arrangements at the entrance on improving the separation efficiency of cyclones have also been studied 13,14 . The experimental study theoretically analyzed the soot elimination performance of cyclone separators and simulated the heat transfer performance of high-temperature flue gas in cyclone separators 15 . By studying the effect of water vapor on the electrostatic precipitator, it was found that water vapor can enhance the soot elimination efficiency, especially soot with particle sizes less than 2 µm 16 .…”

mentioning

confidence: 99%

Soot elimination and heat recovery of industrial flue gas by heterogeneous condensation

Zhao

Tian

et al. 2020

Sci Rep

View full text Add to dashboard Cite

Industrial flue gas systems include fine soot and high-temperature vapor. The continuous emission of the flue gas not only causes fine particulate pollution but also wastes considerable heat energy. Separating soot and purifying flue gas are of great significance for industrial conditions and environmental protection. In this paper, the process of cyclone soot elimination and waste heat recovery by heterogeneous condensation were coupled for the first time. The effects of the flue gas material system and separation operation parameters on the cyclone soot elimination efficiency and heat transfer efficiency were systematically investigated through unit experiments and industrial side-lines. Additionally, the mechanism of enhanced cyclone soot elimination by heterogeneous condensation was also theoretically explored. The experimental results show that the corresponding maximum cyclone heat transfer efficiency and soot elimination efficiency of the Ф40 mm cyclone separator are 42.1% and 89.2%, respectively, while the Ф80 mm cyclone separator can attain an elimination efficiency of 91% and a maximum increase of 67.3% for the heat transfer efficiency, as indicated by the industrial side-line. During the process of cyclone soot elimination and heat recovery by heterogeneous condensation, the heterogeneous condensation caused by heat transfer increases the quality difference between the flue gas molecules and soot droplets, thus improving the cyclone separation efficiency of soot.

show abstract

Combining psychrometrics and fluid dynamics in a cyclone: A sustainable indirect evaporative cooling design

Dias

Ullmann

Silva

et al. 2021

Env Prog and Sustain Energy

View full text Add to dashboard Cite

Brazilian countryside has well-defined dry seasons that are mainly characterized by low relative humidity. The warm, dry air provides a thermal cooling effect when it interacts with wet porous structures (psychrometric effect). Depending on temperature conditions and relative humidity, it is possible to achieve up to 18.0 K reduction in the temperature of the structure, caused by water evaporation. Thus, the objective of this study was to propose and numerically investigate a low cost and sustainable air conditioning system by combining the potential of warm, dry air and characteristics of the flow within cyclones covered with thin wet cotton fabric. A validated mathematical model was developed, and the numerical results indicate that the cyclonic-psychrometric system can provide up to 7.0 K reduction in a 20.0 m 2 room on a warm day (305.0 K) with low relative humidity (20.0%). Energy balances and technical estimates showed that the electric power consumed by the proposed system would represent only 19.8% of the power required by a conventional 18,000 Btu air conditioner to promote the same reduction of temperature. This energy-saving would have a direct and positive impact on the budget of users, especially those with low income and that live in dry regions.

show abstract

Influence of inlet velocity of air and solid particle feed rate on holdup mass and heat transfer characteristics in cyclone heat exchanger

Cited by 32 publications

References 12 publications

CFD and Statistical Approach for Optimization of Operating Parameters in a Tangential Cyclone Heat Exchanger

CFD and Statistical Approach for Optimization of Operating Parameters in a Tangential Cyclone Heat Exchanger

Soot elimination and heat recovery of industrial flue gas by heterogeneous condensation

Combining psychrometrics and fluid dynamics in a cyclone: A sustainable indirect evaporative cooling design

Contact Info

Product

Resources

About