Results 61 to 70 of about 211,478 (216)

A Modified Correlative Model for Condensation Heat Transfer in Horizontal Enhanced Tubes with R32 and R410A Refrigerants

open access: yes, 2023
An experimental study was performed that compared tube side condensation heat transfer characteristics of enhanced tubes (hydrophobic surface tubes (HYD), herringbone micro fin tube (HB), and a composite hydrophobic/herringbone (micro fin) tube (HYD/HB))
Jincai Du   +7 more
core   +1 more source

Experimental Study on Heat Loss of a Single Screw Expander for an Organic Rankine Cycle System

open access: yesFrontiers in Energy Research, 2020
For displacement expanders, the irreversible losses include leakage, friction, heat dissipation, and flow resistance. Currently, the research on the heat loss of expanders is scarce, especially with regards to experimental studies.
Wei Wang   +9 more
doaj   +1 more source

Flow patterns and heat transfer for flow boiling in small to micro diameter tubes

open access: yes, 2008
An overview of the recent developments in the study of flow patterns and boiling heat transfer in small to micro diameter tubes is presented. The latest results of a long-term study of flow boiling of R134a in five vertical stainless steel tubes of ...
Karayiannis, TG   +3 more
core  

Thermal and exergetic analysis of Metal Foam-enhanced Cascaded Thermal Energy Storage (MF-CTES) [PDF]

open access: yes, 2013
Metal Foam-enhanced Cascaded Thermal Energy Storage (MF-CTES) has been proposed to solve the problem of poor heat transfer during heat exchange process, which is caused by unavoidable decrease of temperature differences. This paper conducts a theoretical
Zhao, Changying   +3 more
core   +1 more source

Evaluation of Fin Efficiency and Heat Transfer Coefficient for Fined Tube Heat Exchange

open access: yes, 2012
This study discussed the estimation of the fin efficiency and the pure-heat transfer coefficient in the heat exchanger. One hundred twenty cases of plate fins having known heat transfer coefficients were tested numerically to investigate the validity of ...
Kang, Hiechan
core   +1 more source

Single-phase laminar flow heat transfer from confined electron beam enhanced surfaces [PDF]

open access: yes, 2015
An experimental investigation of the thermal-hydraulic characteristics for single-phase flow through three electron beam enhanced structures was conducted with water at mass flow rates from 0.005 kg/s to 0.045 kg/s.
Reay, DA   +4 more
core   +1 more source

Air-Side Heat Transfer Performance of Louver Fin and Multi-Tube Heat Exchanger for Fuel-Cell Cooling Application

open access: yes, 2012
The present work is performed to evaluate the heat transfer performance of a heat exchanger used in a fuel cell. Because of material constraints and performance requirements, a louver fin heat exchanger is modified for use with conventional micro-channel
Jacobi, Anthony M.   +4 more
core   +1 more source

Heat transfer augmentation for the flow of highly viscous fluids in tubes using cross trapezoid wave tape inserts

open access: yes, 2004
The development and heat transfer augmentation mechanism of a new type cross trapezoid wave tape (CTWT) insert was introduced. Experiments were conducted to evaluate the heat transfer, pressure drop, and fouling characteristics of CTWT inserts for ...
Zhu, D, Wang, S, He, L, Fan, Z
core   +1 more source

Dual-Mode Wicking Structures for Enhanced Evaporative Heat Transfer

open access: yes, 2012
This paper reports on conceptual design and thermo-fluid characteristics of two-phase flow devices enabled by dualmode wicks. In dual-mode wicking structures, liquid and vapor flow paths are integrated on the same plane and segregated flow of the two ...
TeGrotenhuis, Ward E, Krishnan, Shankar
core   +1 more source

Analysis of Enhanced Pool Boiling Heat Transfer on Laser—Textured Surfaces

open access: yes, 2020
Enhancement of pool boiling heat transfer can be attained with a number of passive and active techniques. The paper experimentally analyses the impact of laser treatment of the copper surfaces on pool boiling heat transfer of distilled water and ethyl ...
Łukasz J. Orman   +3 more
core   +1 more source

Home - About - Disclaimer - Privacy