Experimental investigation of heat transfer and second law analysis in a pebble bed channel with internal heat generation

Nazari, Meysam; Vahid, Davood Jalali; Saray, Rahim Khoshbakhti; Mahmoudi, Yasser

doi:10.1016/j.ijheatmasstransfer.2017.06.079

Cited by 35 publications

(13 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The nondimensional form of Eq. ( 11) is ( ( U R R ) × 100 ) which is in percentage [42][43][44][45]. The independent measured variables used to calculate the experimental uncertainties are summarized in Table 4.…”

Section: Experimental Uncertainty Analysismentioning

confidence: 99%

Solid wood impregnated with a bio-based phase change material for low temperature energy storage in building application

Nazari

Jebrane

Terzıev

2022

J Therm Anal Calorim

Self Cite

View full text Add to dashboard Cite

Wood impregnated with a multicomponent mixture of fatty acids as a bio-based phase change material (BPCM) to improve its thermal characteristics was studied. The studied wood/BPCM composites can be used as internal elements in buildings for energy storage. Scots pine and beech sapwood were impregnated with a multicomponent mixture of linoleic acid and coconut oil fatty acids at a ratio of 20:80. Leakage test was conducted and revealed that the maximum leakage for pine and beech were 9 and 8%, respectively. Light microscopy was employed to demonstrate the distribution of the BPCM in the wood structure. Rays in both pine and beech wood served as pathways for impregnation of the BPCM to partly fill the tracheid lumens (pine) and vessels (beech). Thermal characterization of the studied samples employed T-history and DSC methods, concluding that the impregnated wood had significant thermal mass, ability to store excessive energy in terms of latent heat and keep the temperature constant for long time. The specific heat capacity of the impregnated samples was 4–5 J g−1 K−1 i.e., higher than that of the untreated control samples of ca. 2 J g−1 K−1. The thermal conductivity of the samples before and after the impregnation was measured using heat flow meter method and the results showed that the untreated beech wood had higher thermal conductivity compared to pine and the parameter improved when the cell lumens were filled with the BPCM. Scots pine wood with to 80% mass percentage gain (MPG) after impregnation demonstrated an increment in thermal conductivity of 33% while Scots pine and beech with 43 and 38% MPG demonstrated an increase of the conductivity with 8 and 11%, respectively.

show abstract

Section: Experimental Uncertainty Analysismentioning

confidence: 99%

Solid wood impregnated with a bio-based phase change material for low temperature energy storage in building application

Nazari

Jebrane

Terzıev

2022

J Therm Anal Calorim

Self Cite

View full text Add to dashboard Cite

show abstract

“…To understand the presence of the second phase of reflooding, it is firstly necessary to check at the characteristic times of cooling by conduction and by convection in water. For the later, we consider a velocity of 12.5 m/h, corresponding to the interstitial velocity for the first 3 cases PA_0 to PA_2, and a standard correlation since there is no real consensus on the most adequate correlation for convection in such debris bed (Nazari et al, 2017):…”

Section: Appendix A: On the Second Reflooding Phase In Some Casesmentioning

confidence: 99%

Modelling of debris bed reflooding in PEARL experimental facility with MC3D code

Kokalj

Uršič

Leskovar

et al. 2018

Nuclear Engineering and Design

View full text Add to dashboard Cite

show abstract

“…It was also concluded that the tube containing porous material with a porosity of 50% and 63% would increase the heat transfer significantly (about twice) compared with the empty tube. In another experimental study, Nazari et al [53] performed a test for forced heat transfer in a cylindrical duct channel with internal heat production. Dry air has been used as an agent fluid in the process of cooled hot spherical beads.…”

Section: International Journal Of Advanced Engineering Management Anmentioning

confidence: 99%

Using Porous Media to Enhancement of Heat Transfer in Heat Exchangers

Rashidian¹,

Tavakoli²

2017

IJAEMS

View full text Add to dashboard Cite

show abstract

Experimental investigation of heat transfer and second law analysis in a pebble bed channel with internal heat generation

Cited by 35 publications

References 52 publications

Solid wood impregnated with a bio-based phase change material for low temperature energy storage in building application

Solid wood impregnated with a bio-based phase change material for low temperature energy storage in building application

Modelling of debris bed reflooding in PEARL experimental facility with MC3D code

Using Porous Media to Enhancement of Heat Transfer in Heat Exchangers

Contact Info

Product

Resources

About