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Keywords: heat transfer coefficient
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Proceedings Papers

Proc. ASME. HT2020, ASME 2020 Heat Transfer Summer Conference, V001T09A003, July 13–15, 2020
Paper No: HT2020-9006
... arrays background patterns. It can be observed the condensation heat transfer coefficients of the EHT tube is about 1.6–1.7 times higher than that of a stainless steel smooth tube. Enhancement of the EHT tube was achieved due to disruption of the boundary layer, secondary fluid generation, increasing...
Proceedings Papers

Proc. ASME. HT2020, ASME 2020 Heat Transfer Summer Conference, V001T12A003, July 13–15, 2020
Paper No: HT2020-9009
... results show that the evaporation heat transfer coefficient of C-EHT tube is the largest among the tested tubes. However, for the P-EHT tube, its heat transfer coefficient is lower than that of smooth tube. C-EHT tube with special fins has higher heat transfer area, which can also intensify...
Proceedings Papers

Proc. ASME. HT2020, ASME 2020 Heat Transfer Summer Conference, V001T12A007, July 13–15, 2020
Paper No: HT2020-9008
...) of different sizes and densities. Among them, the EHT3 tube has internal threads. Wilson diagram method was used to determine the enhancement ratio of the water side heat transfer coefficient of EHT3 tube. It was found that the pressure drop increased with the increase of mass flux, while the heat transfer...
Proceedings Papers

Proc. ASME. HT2020, ASME 2020 Heat Transfer Summer Conference, V001T12A010, July 13–15, 2020
Paper No: HT2020-8964
... may be attributed to the relatively low thermal conductivity. For condensation, little difference was found between two tested tubes, which means that the material and roughness may have little effect on the heat transfer performance during condensation. materials heat transfer coefficient...
Proceedings Papers

Proc. ASME. HT2019, ASME 2019 Heat Transfer Summer Conference, V001T02A001, July 14–17, 2019
Paper No: HT2019-3418
.... Results show that simultaneous impact lowers splashing threshold due to cracking of central liquid sheet, while successive impact results in higher splashing threshold for the trailing droplet than the leading one due to radial flow inside the residual film. Single-phase heat transfer coefficient...
Proceedings Papers

Proc. ASME. HT2019, ASME 2019 Heat Transfer Summer Conference, V001T04A001, July 14–17, 2019
Paper No: HT2019-3538
... have been investigated experimentally. Transient liquid crystal thermography technique has been used to obtain detailed measurement of heat transfer coefficient for four jet diameter based Reynolds numbers of 3500, 5000, 7500, 12000. It has been observed that crossflow diverters protect the downstream...
Proceedings Papers

Proc. ASME. HT2013, Volume 2: Heat Transfer Enhancement for Practical Applications; Heat and Mass Transfer in Fire and Combustion; Heat Transfer in Multiphase Systems; Heat and Mass Transfer in Biotechnology, V002T07A017, July 14–19, 2013
Paper No: HT2013-17437
... Heat transfer coefficients in sub-cooled flow boiling in symmetrically heated narrow gap channels are reported at power densities of 1 kW/cm 3 and greater. A pair of parallel ceramic resistance heaters in a nearly adiabatic housing forms the flow passage with length-to-gap ratios of 16:1 and 34...
Proceedings Papers

Proc. ASME. HT2012, Volume 2: Heat Transfer Enhancement for Practical Applications; Fire and Combustion; Multi-Phase Systems; Heat Transfer in Electronic Equipment; Low Temperature Heat Transfer; Computational Heat Transfer, 873-879, July 8–12, 2012
Paper No: HT2012-58533
... A set of experimental facilities were set up to measure overall heat transfer coefficient of horizontal-tube falling film evaporators with triangular, rotated square and square-pitch bundles. Effect of spray density, saturation temperature, total temperature difference and inlet steam velocity...
Proceedings Papers

Proc. ASME. HT2012, Volume 2: Heat Transfer Enhancement for Practical Applications; Fire and Combustion; Multi-Phase Systems; Heat Transfer in Electronic Equipment; Low Temperature Heat Transfer; Computational Heat Transfer, 51-60, July 8–12, 2012
Paper No: HT2012-58055
... Laminar mixed convection low-Reynolds-number heat transfer coefficient correlation criterion nanofluids This paper describes an experimental investigation into combined forced and natural convection heat transfer for large-Prandtl-number nanofluids flow in a horizontal tube at low...
Proceedings Papers

Proc. ASME. HT2012, Volume 2: Heat Transfer Enhancement for Practical Applications; Fire and Combustion; Multi-Phase Systems; Heat Transfer in Electronic Equipment; Low Temperature Heat Transfer; Computational Heat Transfer, 865-871, July 8–12, 2012
Paper No: HT2012-58532
... of Technology Dalian 116024, P.R.China Phone: +86 13624081667 Fax: +86 411 84707963 E-mail: lldobll@yahoo.com.cn ABSTRACT The horizontal-tube falling film evaporation is a widely adopted technique in multiple-effect distillation (MED) desalination plant due to the higher heat transfer coefficient under quite...
Proceedings Papers

Proc. ASME. HT2012, Volume 1: Heat Transfer in Energy Systems; Theory and Fundamental Research; Aerospace Heat Transfer; Gas Turbine Heat Transfer; Transport Phenomena in Materials Processing and Manufacturing; Heat and Mass Transfer in Biotechnology; Environmental Heat Transfer; Visualization of Heat Transfer; Education and Future Directions in Heat Transfer, 303-309, July 8–12, 2012
Paper No: HT2012-58345
... and base IL were also measured. NEIL displayed superior thermal performance compared to the base IL. An average of 13% enhancement in heat transfer coefficient was found for the NEIL compared with that of the base IL. Probable reasons of these enhancements are discussed in the paper. Keywords: Nanoparticle...
Proceedings Papers

Proc. ASME. HT2007, ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 3, 843-849, July 8–12, 2007
Paper No: HT2007-32885
... 07 04 2009 In this study, boiling heat transfer coefficients of carbon dioxide in horizontally located smooth tubes were experimentally investigated. The inner diameter of heat transfer tubes was 1, 2, 4, and 6 mm. Experiments were conducted at evaporating temperature of 5 and 15 °C...
Proceedings Papers

Proc. ASME. HT2007, ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 3, 497-505, July 8–12, 2007
Paper No: HT2007-32476
... 07 04 2009 One of the most fundamental concepts in heat transfer is the convective heat transfer coefficient, which is closely related with the flow Reynolds number, flow geometry and the thermal conditions on the heat transfer surface. To define the heat transfer coefficient...
Proceedings Papers

Proc. ASME. HT2007, ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 1, 649-655, July 8–12, 2007
Paper No: HT2007-32149
... 07 04 2009 A high-vacuum solar collector system with flow boiling in tube has high collector efficiency of solar energy. In this paper flow boiling heat transfer coefficient in tube was measured by changing mass flow rate (30–80 kg/m 2 s), heat flux (5–30 kW/m 2 ) and inclined angle...
Proceedings Papers

Proc. ASME. HT2005, Heat Transfer: Volume 2, 253-260, July 17–22, 2005
Paper No: HT2005-72145
... and energy transport during this transient process. Consequently, the development of predictive models for the pressure drop and heat transfer coefficient has been hampered. In order to address this deficiency, an experimental facility has been constructed that enables the flow structure to be observed while...
Proceedings Papers

Proc. ASME. HT2005, Heat Transfer: Volume 2, 757-763, July 17–22, 2005
Paper No: HT2005-72184
... to real applications. As a derivation of the previous studies regarding the no-distributor CFB heat exchangers, third generation model of the heat exchanger is now under investigation. 03 04 2009 Circulating fluidized bed (CFB) Heat exchanger Heat transfer coefficient Fouling...
Proceedings Papers

Proc. ASME. HT-FED2004, Volume 4, 511-519, July 11–15, 2004
Paper No: HT-FED2004-56582
... the reasons for calculating heat flux based on heated area and based on wetted channel area. The need to identify clearly the basis of heat flux is addressed. 03 03 2009 boiling two phase heat transfer coefficient critical heat flux minichannel heat exchanger microchannel superheating...