Analysis of staggered tube bundle heat transfer to vertical foam flow

Gylys, J.; Sinkunas, S.; Zdankus, T.

doi:10.1016/j.ijheatmasstransfer.2007.04.003

Cited by 20 publications

(18 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Investigation with one-phase flow [1,2] and our previous investigation with foam flow showed that heat transfer of the bundles' third and further tubes varies insignificantly [7][8][9]. Comparison of heat transfer intensity of the A3, B3, C3 and D3, E3, F3 tubes of the in-line bundles to downward after turning foam flow at the volumetric void fraction β=0.997 is shown in Fig.…”

Section: Resultsmentioning

confidence: 93%

“…A schematic view of the experimental channel with tube bundles is shown in Fig. 1 The experimental set-up consisted of the following main parts: experimental channel, tube bundle, gas and liquid control valves, gas and liquid flow meters, liquid storage reservoir, liquid level control reservoir, air fan, electric current transformer and stabilizer [7][8][9]. The cross section of the experimental channel had dimensions 0.14 x 0.14 m 2 ; the height of it was 1.8 m. The radius (R) of the channel turning was equal to 0.17 m.…”

Section: Experimental Set-upmentioning

confidence: 99%

“…Tube bundles of different types and geometry may be used in heat exchangers also. Therefore we performed an investigation of staggered [7,8] and in-line [9] tube bundle heat transfer to vertical upward and downward after turning foam flow.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Foam flow turn influence on the in-line tube bundle heat transfer intensity

Gylys¹,

Sinkunas²,

Zdankus³

et al. 2007

WIT Transactions on Modelling and Simulation, Vol 46

Self Cite

View full text Add to dashboard Cite

An experimental investigation of heat transfer from the tubes to the two-phase foam system was performed. Statically stable gas-liquid foam flow was used as a coolant. An investigation was performed on the experimental laboratory set-up consisting of the foam generator, an experimental channel and tube bundles. Two different geometries of in-line tube bundles were used for the experiments. Regularities of heat transfer of the tube bundles to the foam flow under the 180˚ degree turn were analysed in the work. The results of the investigation showed that heat transfer intensity is much higher than that for the one-phase airflow under the same conditions. The heat transfer character of frontal and further tubes to downward foam flow is different in comparison with the one-phase coolant flow. After the turn, local void fraction of the foam is less on the inner side of the foam flow. Therefore heat transfer intensity of the inner side-line tubes is higher than for other tubes of the bundle. The results of the investigation were generalized by criterion equations, which can be used for the calculation and design of the statically stable gas-liquid foam heat exchangers with the in-line tube bundles.

show abstract

Section: Resultsmentioning

confidence: 93%

Section: Experimental Set-upmentioning

confidence: 99%

See 1 more Smart Citation

Foam flow turn influence on the in-line tube bundle heat transfer intensity

Gylys¹,

Sinkunas²,

Zdankus³

et al. 2007

WIT Transactions on Modelling and Simulation, Vol 46

Self Cite

View full text Add to dashboard Cite

show abstract

“…Therefore, we performed the investigation where heat transfer between the staggered [6] and inline [7,8] tube bundles and the vertically upward (in one case) and downward (in the other case) after 180 degree turning foam flow was explored. The purpose for this is acquiring the data that could be used for designing the real heat exchanger.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the heat transfer process between a tube bundle and an upward aqueous foam flow

Gylys

Zdankus

Sinkunas

et al. 2010

Advanced Computational Methods and Experiments in Heat Transfer XI

Self Cite

View full text Add to dashboard Cite

High heat transfer intensity and low energy consumption for coolant transportation to heat transfer location are really significant nowadays. An extended range of heat transfer intensity control (control of volumetric void fraction and flow rate of coolant) and low mass flow rate of coolant are one of the most important factors for heat exchangers. In some cases the usage of aqueous foam as a coolant can solve all of the mentioned problems. Our previous investigation showed that heat transfer between a heated tube and aqueous foam flow is over five to ten times lower for the water coolant, but the density of foam is more than one hundred times lower than that of water. When applying aqueous foam as a coolant in practice, some cases are problematic. The reasons for this are the variation of the structure and the characteristics of foam. Therefore, usage of aqueous foam as a coolant needs to be narrowly explored. This work follows our previous investigations.

show abstract

“…Next experimental series with staggered tube bundle [5,6] and in-line tube bundles of different geometry [7][8][9] in upward and downward after 180-degree turning foam flow followed.…”

Section: Introductionmentioning

confidence: 99%

Tube bundle’s cooling by aqueous foam

Gylys¹,

Sinkunas²,

Zdankus³

et al. 2009

Computational Methods in Multiphase Flow V

Self Cite

View full text Add to dashboard Cite

Single-phase coolants, such as water, oil or air, are mostly used in industrial apparatus. But usage of two-phase coolants, such as aqueous foam, can significantly reduce material and energy expenditures, simultaneously sustaining proper heat transfer intensity on heated surfaces. Comparing with single-phase coolant, the two-phase foam coolant has additional possibility to change the intensity of heat transfer by changing volumetric void fraction of foam. This enables wider range of regulation of heat transfer intensity. An experimental investigation of heat transfer between in-line tube bundle and aqueous foam flow was performed. One type of aqueous foam -statically stable foam -was used as a coolant. Vertically downward moving foam flow crossed the in-line tube bundle. Spacing between the centres of the tubes across the in-line tube bundle was 0.03 m and spacing along the bundle was 0.03 m. During an experimental investigation it was determined dependence of heat transfer intensity on flow parameters: flow velocity, volumetric void fraction and liquid drainage from foam. Apart of this, influence of tube position in the bundle on heat transfer was investigated. Experimental results were summarized by criterion equations, which are suitable for the design and calculation of foam apparatus. Mentioned experiments are the continuation of our previous investigation with foam flow moving downward after 180-degree turning.

show abstract

Analysis of staggered tube bundle heat transfer to vertical foam flow

Cited by 20 publications

References 10 publications

Foam flow turn influence on the in-line tube bundle heat transfer intensity

Foam flow turn influence on the in-line tube bundle heat transfer intensity

Experimental investigation of the heat transfer process between a tube bundle and an upward aqueous foam flow

Tube bundle’s cooling by aqueous foam

Contact Info

Product

Resources

About