Performance evaluation of wire mesh heat exchangers

Sayed, M. A.; Hussin, A. M. T. A. Eldein; Mahmoud, Nabil A.; Aboelsoud, W.

doi:10.1016/j.applthermaleng.2019.114891

Cited by 5 publications

(3 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The high velocity flow regime coefficient should be adjusted to allow for the experimental inertial effects. The permeability, K, and inertial factor, Y can be calculated using equation (8) if the fluid propertiesμ, ρ and screen thickness, Δx are known. Fitting a polynomial equation to experimental pressure drop versus air velocity results yielded the permeability and inertial factor for all tested wire screens.…”

Section: Resultsmentioning

confidence: 99%

“…For all of the wire screen samples examined, equation (5) fit the data well. If the best fit coefficients for the second-order polynomial are found, the permeability K and inertial factor Y can be calculated using equation (8). The results are displayed in table 4.…”

Section: Resultsmentioning

confidence: 99%

“…Sayed et al [8] investigated experimentally a cross-flow regenerator with three different types of wire screens. Plain copper tubes and wire screens in various positions were compared, and the results indicated that the heat transfer rate could be increased by up to 114%.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Airflow resistance analysis of wire screens used in waste heat recovery systems

Mahesh,

Jayaraman

2024

Eng. Res. Express

View full text Add to dashboard Cite

Wire screens are widely used in electronics, refrigeration, insect screens, food processing, filtration, oil refinery, agricultural, and other applications. For instance, these wire screens are used as heat exchange materials in regenerators due to higher surface area density. Heat transmission can typically be enhanced by increasing the surface area density of wire screens, however flow obstruction is a possibility. As a result, this wire screen analysis is necessary not only to estimate the heat transfer rate but also to assess the airflow obstruction. This extensive study investigates the role of wire screens in a wind tunnel on the different velocities of air moving through them in order to compute the pressure drop. Six wire screens were examined as part of this investigation, and the experimental results were utilised to derive the coefficients of second order polynomials (a,b, and c). Permeability and inertial factor were calculated using this second order polynomial and Forchheimer's equations. Second-order polynomial equations were found to be the best fit for the permeability versus porosity ratio and the inertial factor versus porosity ratio.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Airflow resistance analysis of wire screens used in waste heat recovery systems

Mahesh,

Jayaraman

2024

Eng. Res. Express

View full text Add to dashboard Cite

show abstract

Nusselt number and friction factor variations in a capsule heat exchanger filled with eco‐friendly jatropha seed oil–based multi walled carbon nanotubes nanofluid

Rostami

Aghaei

Hezaveh

et al. 2020

Math Methods in App Sciences

View full text Add to dashboard Cite

The present 3‐D numerical paper investigates Nusselt number and friction factor variations in a capsule heat exchanger filled with eco‐friendly jatropha seed oil–based MWCNTs nanofluid. For all studied models, inlet nanofluid temperature is Tin = 310 K, and the hot source with q = 650 W/m2 is adopted. Due to achieve the most efficient Newtonian nanofluid in present study, solid nanoparticles of MWCNT are added to the base fluid in volume concentration of 0.2% to 0.8%. Also, different riser heights (25, 35, and 50 cm) and different emissivity values of capsule walls (ε = 0.3 and 0.7) are studied in this paper. In the current modeling, the SST k – ω turbulence model has been assumed as the turbulence model. Based on achieved results in this paper, the model with capsule angle of β = 30° has better heat transfer than the other studied slopes, which is followed with models with β = 60° and β = 90°, respectively. Also, it is seen that gravity has a significant influence on velocity contours, and in model with β = 90° more pressure drop may be seen, which is followed with models with β = 60° and β = 90°, respectively. Moreover the predicted pressure drop values from inlet to outlet always increase by increase of Reynolds numbers; therefore, there is an optimum Reynolds number during the studied range of flow velocities which leads to the minimum pressure drop penalty. Also, it is realized that usage of nanofluid at higher nanoparticles volume concentrations leads to higher Nusselt numbers during all studied Reynolds numbers. The model with nanoparticles volume fraction of ϕ = 0.8% has the highest values of predicted average Nusselt number which is followed with the models with ϕ = 0.6%, ϕ = 0.4%, and ϕ = 0.2%, respectively. Besides, it is clearly found that usage of walls with different emissivity values has not a significant influence on thermal–hydraulic characteristics of studied capsule heat exchanger.

show abstract