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Thursday, July 23, 2020 | History

1 edition of Nucleate pool-boiling of R-114 refrigerant and oil mixtures from water-heated enhanced surfaces found in the catalog.

Nucleate pool-boiling of R-114 refrigerant and oil mixtures from water-heated enhanced surfaces

Stephen M. McManus

Nucleate pool-boiling of R-114 refrigerant and oil mixtures from water-heated enhanced surfaces

by Stephen M. McManus

  • 316 Want to read
  • 27 Currently reading

Published .
Written in English

    Subjects:
  • Mechanical engineering

  • The Physical Object
    Pagination98 p.
    Number of Pages98
    ID Numbers
    Open LibraryOL25462756M

    THE MECHANISM OF NUCLEATE POOL BOILING HEAT TRANSFER TO SODIUM AND THE CRITERION FOR STABLE BOILING Isaac Shai January DSR Preparation of Test Surfaces 44 Surfaces for Repeating Marto's Work 44 Surfaces with an Artificial Cavity and a. One such scheme is the simple addition of the nucleate boiling and liquid convective heat fluxes, which seems to work reasonably well for large nucleate boiling fluxes at large liquid subcooling [e.g., del Valle and Kenning ()], although the nucleate boiling flux .

    Pool nucleate boiling heat transfer curves for pure nitrogen, oxygen, argon, methane, and carbon tetrafluoride have been measured on a horizontal, flat, circular, platinum plated disk for saturation pressures ranging from 1 atm. or less to the immediate . New HTRI pool boiling data were obtained for water-hydrocarbon mixtures with water as BG Nucleate Pool Boiling of Water-Hydrocarbon Mixtures Author(s): S. B. Yilmaz The boiling heat transfer coefficient data were compared to the predictions by HTRI mixture boiling methods of (1) Reduced Pressure (RP)/Boiling Range (BR) and (2.

    surfaces for enhanced boiling performance. The nucleate boiling component in flow boiling is also expected to exhibit a somewhat similar dependence. A quantitative and qualitative amount of investigations have been reported to establish the effect of surface finish and structure on the pool boiling : Ali Hussain Tarrad. Nucleate pool boiling of liquid mixtures finds many applications in chemical and petrochemical process industries, principally the processes involving the boiling of multicomponent liquid mixtures. Recent interest in these as working fluids in thermal power plants and refrigeration systems is growing because of their potential to reduce.


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Nucleate pool-boiling of R-114 refrigerant and oil mixtures from water-heated enhanced surfaces by Stephen M. McManus Download PDF EPUB FB2

Nucleate Pool-Boiling of R Refrigerant and Oil Mixtures from Water-Heated Enhanced Surfaces by Stephen M. McManus Lieutenant, United States Navy B.S. E., University of New Mexico, Submitted in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN MECHANICAL ENGINEERING from the NAVAL POSTGRADUATE.

Measurements of pool boiling heat-transfer coefficients in pure R and Roil mixtures are reported for a bundle of smooth tubes and three Cited by: Nucleate pool boiling of R and Roil mixtures--I for a 19 fpi tube at values of heat flux greater than 20 kW m 2, using actual wetted area yielded lower heat transfer performance than a smooth tube with a diam- eter equal to the fin tip diameter.t Many investigators have studied low integral-fin tubes with varying fin profiles [Fig.

1 (a) and (b)] as a means of further Cited by:   Nucleate pool-boiling of R refrigerant and oil mixtures from water-heated enhanced surfaces. by McManus, Stephen : Nucleate Pool-Boiling of R Refrigerant and Oil Mixtures from Water-Heated Enhanced Surfaces by Stephen M.

McManus Lieutenant, United States Navy B. E., University of New Mexico, Submitted in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN MECHANICAL ENGINEERING from the NAVAL POSTGRADUATE SCHOOL June ABSTRACT Heat- transfer measurements.

Nucleate pool-boiling of R refrigerant and oil mixtures from water-heated enhanced surfaces. By Stephen M. McManus. Get PDF (6 MB) Abstract. Approved for public release; distribution is unlimitedHeat- transfer measurements were made for a single, water-heated tube in a pool of R to simulate operating conditions of a water chiller Author: Stephen M.

McManus. Nucleate pool boiling of R and R/oil mixtures from single enhanced tubes Sugiyama, Dean C. MIXTURES BOILINGOF FROMSINGLE RAND ENHANCED R/0IL TUBES by [iyama SEPTEMBER Thesis Thesis Advisor: Co-Advisor: Pau Stephen Approvedforpublicrelease:Distribution heattransfer,nucleatepoolboiling,R Nucleate Pool Boiling Heat Transfer Coefficients of Distilled Water (H 2 O) and Ra/Oil Mixtures From Rib-Roughened SurfacesCited by: Nucleate pool boiling has an important place in refrigeration industries.

The pool boiling process occurs in the shell side of flooded evaporators and low pressure refrigerants are proposed for industry applications. Indian Journal of Chemical Technology Vol. 11, Septemberpp. A generalized correlation of nucleate pool boiling of liquids S Bhaumika, V K Agarwalb & S C Guptab* aMechanical Engineering Department, Tripura Engineering College, AgartalaIndia bChemical Engineering Department, Indian Institute of Technology Roorkee, Roorkee Cited by: 9.

Indian Journal of Chemical Technology Vol. 4, May ,pp A generalized correlation of nucleate pool boiling heat transfer SK Agrawal. SC Gupta & B SVarshney Department of Chemical Engineering, University of Roorkee, RoorkeeIndiaAuthor: S.

Agrawal, S. Gupta, B. Varshney. There is no published literature about nucleate pool boiling heat transfer characteristics of a refrigerant/oil mixture on a metal foam cover at oil concentrations of more than 5%, and the.

Nucleate Pool Boiling Heat Transfer of Ra and Ra-PVE Lubricant Mixtures on Smooth and Five Enhanced Tubes Wen-Tao Ji State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering,Cited by: Nucleate Pool Boiling Heat Transfer In Lticomponent Mixtures On Surfaces: An Review International Journal of Mechanical and Industrial Engineering (IJMIE) ISSN No.

–, Vol-2, Iss-4, composition on the upward facing polish copper cylindrical tube of 40 mm diameter at saturation pressure MPa. Nucleate pool boiling has an important place in refrigeration industries. The pool boiling process occurs in the shell side of flooded evaporators and low pressure refrigerants are proposed for industry applications.

Enhancement of heat transfer rate depends on different design. The influence of various oil contents in Ra is investigated for nucleate pool boiling on copper tubes either sandblasted or with enhanced heating surfaces (GEWA-B tube). Polyolester oils (POE) (Reniso Triton) with medium viscosity 55 cSt (SE55) and high viscosity cSt (SE) were by: 1 NUMERICAL PREDICTION OF NUCLEATE POOL BOILING HEAT TRANSFER COEFFICIENT UNDER HIGH HEAT FLUXES Milada L.

PEZOa*, Vladimir D. STEVANOVIĆb aDepartment of Thermal Engineering and Energy, Institute of Nuclear Sciences - Vinča P.O. BoxBelgrade, SerbiaFile Size: KB. Abstract. Nucleate pool boiling using a surface within an angular geometry was conducted in saturated, deionized and degassed water.

Data were taken at atmospherical pressure and at heat fluxes from W / m 2 to W / m 2 while decreasing the heat flux. The effects of the angle on the initiation of boiling of nearly contact line are Cited by: 9. The Influence of Surface Roughness on Nucleate Pool Boiling Heat Transfer The effect of surface roughness on pool boiling heat transfer is experimentally explored over a wide range of roughness values in water and Fluorinert™ FC, two fluids with different thermal properties and wetting characteristics.

The test surfaces ranged from aFile Size: 1MB. the influence of these parameters on the pool boiling dy-namics. The pool boiling is considered and heat is sup-plied through the bottom wall. Spatial and temporal sites and intensities of the vapor generation are prescribed on the heated surface as boundary conditions, while the vapor volume exists above the two-phase mixture swell Size: KB.

Bubble dynamics is the most important sub-phenomenon, which basically affects the nucleate pool boiling heat transfer coefficient. In this research, bubble departure diameter values were experimentally measured for heat fluxes up to kW.m Experiments were carried out for pool boiling of pure liquids, including water.Nucleate pool boiling performance of smooth and finned tube bundles in R and R/oil mixtures [Carl Lee Anderson] on *FREE* shipping on qualifying offers.Nucleate pool boiling of pure and liquid mixtures are involved in many chemical and petrochemical applications such as multicomponent distillation, air separation, and refrigeration and power cycles.

Design, operation and optimization of the involved equipments necessitate an accurate prediction of the boiling heat.