Heat Transfer and Friction Characteristics of an Artificially Roughened Solar Air Heater

Prasad, Rakesh; Yadav, Anil Singh; Singh, Nishant; Johari, Dilip

doi:10.1007/978-981-13-6416-7_57

Cited by 46 publications

(4 citation statements)

References 13 publications

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“…Table 3, lists the max value of Nu. 2.31 Arc shaped [79] 1.7 Square 2.73 Right-angle triangular [81] 3.1 equilateral triangular 3.073 Chamfered square [83] 3.214 Square [84] 2.86 Saw-tooth [85] 1.78 Circular [86] 2.31 Rectangular tapered [87] 2.56 Circular [88] 2.53 Saw tooth [89] 2.18 Semi-circular [90] 2.76 Triangular [91] 2.7 Forward chamfered [92] 2.88 Semi-circular [93] 3.24 Circular [94] 2.47 Triangular [95] 2.94 Semi-circular [96] 2.08 Square wave [97] 2…”

Section: Roughness In Multiple Forms With the Gapmentioning

confidence: 99%

Revisiting the Effect of Rib Roughness on the Performance of Solar Air Heater

Nagayach,

Sharma,

Agrawal

et al. 2023

E3S Web Conf.

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The energy collected from various renewable resources, such as sunlight, geothermal warmth, wind, and water, is referred to as renewable power. The sun is the ultimate source of vitality. Solar radiation vitality can be utilized in many functions, such as heating buildings and dusty foliage crops, dying chicken, wood taste, and treating modern elements. All the energy patterns in nature asking them are the origin of the sun. The solar air heater (SAH) is very common along with commonly applied sun-oriented heating apparatus. Perhaps, SAH is utilized for a wide range of applications, from residential to commercial. Improving the SAH efficiency is done by applying rib elements on the bottom side of the roughness element ribs, grooves, fins, baffles, twisted tapes, deflectors, etc., and improved Thermo-hydraulic performance (THP). Various investigators have prepared several practices in their research work to obtain a greater transfer of thermal energy between these solar collector heaters by applying various rib elements to the absorbent surface. The objective of that study is obliged to describe and conclude tests on the impact of modest rib element height and face projection upon absorber plate along duct surface as artificial rib elements of different shapes on heat transfer along friction factor. The research on artificially roughened SAH ducting is thoroughly analyzed in this paper. The purpose of this paper is to summarize several studies on the thermal and hydraulic performance of synthetically roughened SAH ducting. For the analyzed range of parameters, it was discovered that the usage of arc-shaped-shaped rib geometry and metal grit ribs has the maximum THP parameters in comparison to often roughness geometry. For the tested range of parameters, the use of broken arc ribs has the highest Nu compared to the plain arc-shaped rib roughness. Arc configuration of roughness element exhibits fewer ranges pressure diminishes than the V form design because the produced secondary flow has a curved structure and is rougher.

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Section: Roughness In Multiple Forms With the Gapmentioning

confidence: 99%

Revisiting the Effect of Rib Roughness on the Performance of Solar Air Heater

Nagayach,

Sharma,

Agrawal

et al. 2023

E3S Web Conf.

Self Cite

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“…Due to this, it is suggested that turbulence be created just at the next-to-heat transfer surface region, to help lower power consumption. Roughness components should be kept at a lower height relative to the duct size in order to achieve this goal [30][31][32][33][34][35][36][37][38][39][40][41][42][43]. The critical dimensionless geometrical parameters for characterizing roughness are as follows: 1.…”

Section: Fig 2 Various Ribsmentioning

confidence: 99%

Enhanced Solar Air Heaters for Crop Drying

Sahu¹,

Sanodiya²

2021

IJAE

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Solar air heaters are placed on farms to provide heat for the drying of grain and crop harvesting and harvesting. The results of the thermal study showed that solar air heaters are capable of providing a sufficient increase in air temperature under the majority of crop drying circumstances studied. The restricted thermal capacity of air, as well as the low heat transfer coefficient between the absorber plate and the air flow via the ducting system, both contribute to the overall thermal efficiency of solar air heaters. Solar air heaters must be more efficient in order to be more affordable. This may be accomplished by increasing the heat transfer coefficient between the absorber plate and the air flow passing through the duct. More heat transfer coefficients can be increased by using either active or passive approaches. In most situations, it may be cost-effective to use solar air heaters and incorporate artificial roughness on the absorber plate. The rate of heat transmission from the solar air heater's duct to the fluid flow may be increased by creating artificial roughness on the surface of the duct. The study focused on several roughness element geometries for solar air heater ducts, and the results indicated that there is a link between the two. This paper attempts to find ways to artificially increase the heat transfer capacity of solar air heaters' ducts by using element geometries which have been utilised in solar air heaters' heat transfer devices.

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“…This can lead to significant cost savings on energy bills and a healthier indoor environment for building occupants. Overall, the application of solar energy in UFAD systems can lead to a more sustainable and energy-efficient building, while also improving indoor air quality and thermal comfort [19][20][21][22][23][24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

A Revisit to Recent Developments in the Underfloor Air Distribution Systems

Ahmad,

Saxena,

Yadav

et al. 2023

E3S Web Conf.

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Underfloor air distribution, also known as UFAD, is a technique of providing the space conditioning in offices as well as other public spaces. Because of the substantial benefits which it can provide, it is progressively being regarded as a major alternative to the conventional ceiling-based air distribution systems. This is due to the fact that the UFAD is a technique of providing the space conditioning in the public spaces. This method delivers cooled air directly into the inhabited zone of the building by making advantage of the open space that is created (the underfloor plenum) that exists between the structural concrete slab as well as the underside of a raised access floor system. Air may be supplied through a multiplicity of the supply outlets positioned at the floor level (this is the most typical configuration), or it can be integrated into the structure of the furniture and walls. This paper provides a recent development in the field of HVACs that have employed UFAD systems for improving their effectiveness as well as thermal comfort of humans. UFAD has the potential to assist in the enhancement of a building’s energy efficiency, indoor air quality, occupant comfort, and sustainable practises. The future scope of UFAD is significant, and it has the potential to become a mainstream technology in the building industry.

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Heat Transfer and Friction Characteristics of an Artificially Roughened Solar Air Heater

Cited by 46 publications

References 13 publications

Revisiting the Effect of Rib Roughness on the Performance of Solar Air Heater

Revisiting the Effect of Rib Roughness on the Performance of Solar Air Heater

Enhanced Solar Air Heaters for Crop Drying

A Revisit to Recent Developments in the Underfloor Air Distribution Systems

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