G1 Heat Transfer in Pipe Flow

Gnielinski, Volker

doi:10.1007/978-3-540-77877-6_34

Cited by 109 publications

(140 citation statements)

References 13 publications

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“…The conduction of heat on material is by Fourier law and in the fluid around pipe the heat transfer is due to convection. The heat transfer in cylindrical case is of logarithmic variation in contrast to the linear variation in plane wall [4]. In steady one dimensional conduction in cylinder temperature is a function of only radial co-ordinates.…”

Section: Literature Reviewmentioning

confidence: 97%

Thermal Analysis of Die Formed Elbow Joint and Mitered Elbow Joint Using Altair HyperWorks Software

Pal¹,

Kumar²,

Kumar³

2014

IOSRJMCE

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Section: Literature Reviewmentioning

confidence: 97%

Thermal Analysis of Die Formed Elbow Joint and Mitered Elbow Joint Using Altair HyperWorks Software

Pal¹,

Kumar²,

Kumar³

2014

IOSRJMCE

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“…The Nusselt number ( ) is calculated depending on the flow regime (e.g. (Gnielinski 2010)), and represents the thermal conductivity of the fluid.…”

Section: Parameter Calculationmentioning

confidence: 99%

Modelling and Experimental Validation of a Novel Co-axial Spiral Borehole Heat Exchanger

Cazorla-Marín¹,

Montagud²,

Witte³

et al. 2017

Proceedings of the IGSHPA Technical/Research Conference and Expo 2017

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In order to optimize the operation of a ground source heat pump (GSHP) system, the development of dynamic models that integrate all the system components is a key factor. Particularly, the modelling of the ground source heat exchanger and its coupling to the heat pump operation becomes important. Usually, this kind of systems present an on/off operation, which makes it necessary to have an accurate prediction of both the short and long thermal response of the borehole heat exchanger (BHE). In this context, the novel B2G dynamic model was developed and experimentally validated in previous works for a single U-loop BHE. This work presents the adaptation and experimental validation of the B2G dynamic model to a novel co-axial spiral BHE configuration designed in the framework of a HORIZON 2020 European Project, GEOT€CH (Geothermal Technology for €conomic Cooling and Heating).The results show that the B2G approach applied to this specific configuration produces a model that can accurately predict the behavior of the BHE.

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“…with the air face velocity w 0 , where s is the fin spacing, d f the fin thickness and Local heat transfer coefficients in circular tubes [46,47] are applied on the saline water side. Heat transfer through the condensate film is described by Nusselt's condensation theory [28].…”

Section: Heat Transfer Equations For Plate-fin Tube Heat Exchangersmentioning

confidence: 99%

Design of Plate-Fin Tube Dehumidifiers for Humidification–Dehumidification Desalination Systems

Sievers

Lienhard

2014

Heat Transfer Engineering

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A two-dimensional numerical model of a plate-fin tube heat exchanger for use as a dehumidifier in a humidification-dehumidification (HDH) desalination systems is developed, because typical heating, ventilating, and air conditioning (HVAC) dehumidifier models and plate-fin tube dehumidifier geometries are not intended for the considerably higher temperature and humidity ratio differences which drive heat and mass transfer in HDH desalination applications. The experimentally validated model is used to investigate the influence of various heat exchanger design parameters. Potential improvements on common plate-fin tube dehumidifier designs are identified by examining various methods of optimizing tube diameter, and longitudinal and transverse tube spacing to achieve maximum heat flow for a given quantity of fin material at a typical HDH operating point. Thicker fins are recommended than for HVAC geometries, as the thermal conductive resistance of HVAC fins restricts dehumidifier performance under HDH operating conditions.

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G1 Heat Transfer in Pipe Flow

Cited by 109 publications

References 13 publications

Thermal Analysis of Die Formed Elbow Joint and Mitered Elbow Joint Using Altair HyperWorks Software

Thermal Analysis of Die Formed Elbow Joint and Mitered Elbow Joint Using Altair HyperWorks Software

Modelling and Experimental Validation of a Novel Co-axial Spiral Borehole Heat Exchanger

Design of Plate-Fin Tube Dehumidifiers for Humidification–Dehumidification Desalination Systems

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