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You searched on: Author: mark kedzierski

Displaying records 61 to 70 of 95 records.
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61. Condensation (Chapter 15)
Published: 1/1/2003
Authors: Mark A Kedzierski, J C Chato, T J Rabas
Abstract: Condensation is the process by which a vapor is converted to its liquid state. Because fo the large internal energy difference between the liquid and vapor states, a significant amount of heat can be released during the condensation process. For this ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910442

62. A Generalized Pressure Drop Correlation for Evaporation of Alternative Refrigerants in Micro-Fin and Smooth Tubes
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6333
Published: 10/1/2001
Authors: J Y Choi, Mark A Kedzierski, Piotr A Domanski
Abstract: This paper presents a pressure drop correlation for evaporation and condensation in smooth and micro-fin tubes. The correlation was developed from a data base consisting of the following pure and mixed refrigerants: R125, R134a, R32, R410A (R32/R125 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860792

63. Generalized Pressure Drop Correlation for Evaporation and Condensation in Smooth and Micro-Fin Tubes
Published: 10/1/2001
Authors: J Y Choi, Mark A Kedzierski, Piotr A Domanski
Abstract: This paper presents a pressure drop correlation for evaporation and condensation in smooth and micro-fin tubes. The correlation was developed from a data base consisting of the following pure and mixed refrigerants: R125, R134a, R32, R410A (R32/R125 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860849

64. Effect of Bulk Lubricant Concentration on the Excess Surface Density During R123 Pool Boiling
Series: Journal of Research (NIST JRES)
Published: 7/1/2001
Author: Mark A Kedzierski
Abstract: This paper investigates the effect that bulk lubricant concentration has on 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 den ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860851

65. 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

66. 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

67. 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

68. 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

69. 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

70. 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



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