Experimental Study on the Identification of Heat Transfer Characteristics for Subcooled Flow Boiling of Novec 649 PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Experimental Study on the Identification of Heat Transfer Characteristics for Subcooled Flow Boiling of Novec 649 PDF full book. Access full book title Experimental Study on the Identification of Heat Transfer Characteristics for Subcooled Flow Boiling of Novec 649 by Moritz Till Bruder. Download full books in PDF and EPUB format.
Author: Moritz Till Bruder
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
Author: Moritz Till Bruder
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
Author: Moritz Bruder
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Frank Andrew Jeglic
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 44
Get Book Here
Book Description
Author: Pervej Rahman
Publisher:
ISBN:
Category :
Languages : en
Pages : 106
Get Book Here
Book Description
An experimental setup was developed to study the region of subcooled flow boiling. Multiple studies were carried out to investigate the effects of liquid velocity, pressure, and temperature on the boiling heat transfer of subcooled fluid flowing through a heated annular channel. Water was used as the working fluid and principle of Ohmic heating was used to raise water temperature. The system pressure, heat flux, & mass flux ranged from 101 to 912 kPa, 19 to 155 kW/m2, and 83 to 332 kg/m2-s, respectively. This report contains boiling curves, heat transfer coefficients of various studies and a description of the experimental setup.
Author: S. Stephen Papell
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 28
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
Get Book Here
Book Description
Coolant subcooled boiling in the cylinder head regions of heavy-duty vehicle engines is unavoidable at high thermal loads due to high metal temperatures. However, theoretical, numerical, and experimental studies of coolant subcooled flow boiling under these specific application conditions are generally lacking in the engineering literature. The objective of this project was to provide such much-needed information, including the coolant subcooled flow boiling characteristics and the corresponding heat transfer coefficients, through experimental investigations.
Author: James R. Stone
Publisher:
ISBN:
Category : Boilers
Languages : en
Pages : 44
Get Book Here
Book Description
Experimental data on subcooled and net-quality boiling heat transfer to low pressure water in electrically heated tubes.
Author: Bren Andrew Phillips
Publisher:
ISBN:
Category :
Languages : en
Pages : 206
Get Book Here
Book Description
Subcooled flow boiling of water was experimentally investigated using high-speed video (HSV), infrared (IR) thermography, and particle image velocimetry (PIV) to generate a unique database of synchronized data. HSV allowed measurement of the bubble departure diameter. IR thermography allowed measurement of wall superheat (local distribution and surface-averaged values), heat transfer coefficient, nucleation site density, and bubble frequency. Particle image velocimetry allowed for the measurement of velocity profiles in the liquid phase for single bubble nucleation events. The tests were performed at pressures of 1.05, 1.5, and 2.0 bar and at subcoolings of 5, 10, and 15 °C. The mass flux values explored were 150-1250 kg/m2/s. The heat flux values explored were 100-1600 kW/m2. As expected, the heat transfer coefficients increased with increasing mass flux in the single-phase convection and partial boiling regions, and converged to a fully-developed boiling curve for high heat fluxes. The bubble departure diameter decreased with increasing mass flux and decreasing heat flux; in accordance with Sugrue's model. The nucleation site density increased with increasing superheat and decreasing mass flux, as predicted by Kocamustafaogullari and Ishii's model. The nucleation site density models under-predicted the nucleation site density for a given wall superheat. Wait time and frequency models did not reproduce the data accurately, and underestimated wait time by an order of magnitude. A new mechanistic model for calculating the wait time was developed that split the wall heat flux into the component that is transferred to the fluid, and the component that is transferred as sensible heat into the heater wall. Significant localized cooling was observed underneath bubbles sliding along the wall after departure from a nucleation site, an effect which should be considered in advanced models of subcooled flow boiling. The sliding bubble thermal effects were found to be insensitive to system conditions and were limited by the thermal conduction within the substrate. Bubble growth front velocities, and regions of flow influence of departing bubbles were measured with PIV. The database generated in this project can be used to inspire or validate mechanistic models and/or CFD simulations of subcooled flow boiling heat transfer.
Author: Kurt Walter Forster
Publisher:
ISBN:
Category : Bubbles
Languages : en
Pages : 84
Get Book Here
Book Description
Author: Jianyun Shuai
Publisher: Cuvillier Verlag
ISBN: 3865372406
Category :
Languages : en
Pages : 131
Get Book Here
Book Description
