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Author: mark kedzierski

Displaying records 61 to 70 of 91 records.
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61. Use of Fluorescence to Measure the Lubricant Excess Surface Density During Pool Boiling
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6727
Published: 1/1/2001
Author: Mark A Kedzierski
Abstract: This paper presents what are believed to be the first measurements of the non-adiabatic lubricant excess surface density on a roughened, horizontal flat pool-boiling surface. Both pool boiling heat transfer data and lubricant excess surface density ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860847

62. Refrigerant/Lubricant Mixture Boiling Heat Transfer Research at NIST
Published: 9/1/2000
Author: Mark A Kedzierski
Abstract: This paper overviews the boiling heat transfer research of the recent few years at NIST (National Institute of Standards and Technology) on refrigerant/lubricant mixtures. The aim of the research was to fundamentally understand the effects of lubric ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860829

63. Evaporation and Condensation Heat Transfer Performance of Flammable Refrigerants in Brazed Plate Heat Exchangers
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6541
Published: 7/1/2000
Authors: Mark A Kedzierski, J C Chato, T J Rabas
Abstract: Measured overall Nusselt numbers were determined for R22, R290, R290/600a, and R32/152a undergoing evaporation and condensation in a brazed plate heat exchanger. The refrigerants experienced wavy, stratified flow at low heat and mass fluxes, 1.3 to ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860824

64. The Effect of Lubricant Concentration, Miscibility, and Viscosity on R134a Pool Boiling
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6450
Published: 1/1/2000
Author: Mark A Kedzierski
Abstract: This paper presents pool boiling heat transfer data for twelve different R134a/lubricant mixtures and pure R134a on a Turbo-BIITM-HP surface. Themixtures were designed to examine the effects of lubricant mass fraction, viscosity, and iscibility on ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860804

65. A Simple Prediction Method for Condensation Heat Transfer Inside a Micro-fin Tube
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6417
Published: 11/1/1999
Authors: F M Donati, Mark A Kedzierski
Abstract: This study examines an alternative method for modeling in-tube condensation heat transfer. The method's fundamental premise is that the heat flux is directly proportional to the difference between the enthalpy of the vapor at saturated free stream co ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860785

66. Effect of Heating Boundary Conditions on Pool Boiling Experiments
Published: 10/1/1999
Authors: J Darabi, M M Ohadi, M A Fanni-Tabrizi, S V Dessiatoun, Mark A Kedzierski
Abstract: The two widely used experimental methods for pool boiling experiments are evaluated. Boiling heat transfer data employing either the water or electric heating method obtained by various researchers are compared and discussed. The electric heating m ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860797

67. The Effect of a Boiling Additive on R123 Condensation on a Vertical Integral-Fin Surface
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6314
Published: 3/1/1999
Author: Mark A Kedzierski
Abstract: This paper examines the effect of the addition of 0.5% mass isopentane to R123 on thevapor-space condensation heat transfer of R123.In a previous study, the pool boiling performance of R123 was improved by adding 0.5% mass isopentane. Consequently, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860783

68. Enhancement of R123 Pool Boiling by the Addition of N-Hexane
Published: 1/1/1999
Author: Mark A Kedzierski
Abstract: This paper presents the heat transfer data used to file international patent WO 94/18282. The data consisted of pool boiling performance of a GEWA-TTM surface for three fluids: (1) pure R123, (2) R123/n-hexane (99/1), and (3) R123/n-hexane (98/2). Th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910444

69. Enhancement of R123 Pool Boiling by the Addition of Hydrocarbons
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6244
Published: 10/1/1998
Author: Mark A Kedzierski
Abstract: This paper present pool boiling heat transfer data for ten different R123/hydrocarbon mixtures. The data consisted of pool boiling performance of a GEWA-T^uTM^ surface for pure R123 and for ten dilute solutions of five different hydrocarbons: (1) pe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860772

70. Ralph Webb: A Pioneering Proselytizer for Enhanced Heat Transfer
Published: 10/1/1998
Author: Mark A Kedzierski
Abstract: Ralph Webb, a pioneer in enhanced heat transfer, proselytizes his field for the economic and technical benefit of industry. His mission has been, and always will be, the promotion of enhanced heat transfer technology. As a result, he has been instr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860771



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