Novel multi-helical coil heat exchanger-based small-scale organic Rankine cycle: A detailed heat transfer analysis

Pathak, Saurabh; Shukla, Sudhish Kumar; Sagade, Atul A.

doi:10.1016/j.energy.2023.127684

Cited by 5 publications

(2 citation statements)

References 34 publications

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“…Using the Wilson plot approach, an empirical coefficient correlation for the annulus side was determined. Pathak et al [111] developed an organic Rankine cycle prototype that was created using a new multi-coil evaporator and condenser as the waste heat source. Multi-helical coil HXs performed better at HT than single-helical coil HXs.…”

Section: Fig 11 (A) a Hthx With Spherical Corrugation (B)heat Flux Fo...mentioning

confidence: 99%

“…Numerous studies that come within the several categories of HTE in HTHX have been conducted. The passive method uses geometrical or surface alterations that don't require external power, such as fines [57][58][59][60][61][62][63][64][65][66][67], inserts in tube sides [68][69][70][71][72][73][74][75][76][77][78][79][80] geometrical modifications and baffles in shell sides [108][109][110][111][112][113][114][115][116][117][118]. Fig.…”

Section: Challenges and Future Scopementioning

confidence: 99%

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Review of passive methods of heat transfer enhancement in helical tube heat exchanger

Marzouk,

Abou Al-Sood,

El-Said

et al. 2023

Journal of Contemporary Technology and Applied Engineering

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In contemporary times, Helical tube heat exchangers (HTHXs) have gained significant prominence in energy-related sectors, frequently finding application in industrial and technical settings. Their impact on overall system efficiency and size is substantial. A comprehensive review addressing passive methods of heat transfer enhancement in HTHXs is notably absent. This paper justifies its significance by providing a recent and systematic review of available passive methods. The passive approach offers advantages such as the absence of external power requirements and lower operational costs compared to active methods. Studies collectively indicate a noteworthy progression in heat transfer enhancement in HTHXs. The paper meticulously evaluates passive methods like fins, inserts, geometry modifications, and baffles, which collectively represent 18.7%, 22.3%, 42.2%, and 16.8% of research efforts, respectively. Both experimental and numerical studies focus on improving heat transfer in HTHXs. However, further exploration is necessary to understand the negative effects of pressure drop in tube-side flow. Future research should also prioritize the development of geometric designs for HTHX surfaces, potentially incorporating materials coatings to further enhance heat transfer. The authors present insightful issues and ideas that they estimate deserving of additional investigation in subsequent research endeavors.

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Section: Fig 11 (A) a Hthx With Spherical Corrugation (B)heat Flux Fo...mentioning

confidence: 99%