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Author: mark kedzierski

Displaying records 51 to 60 of 88 records.
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51. Improved Thermal Boundary Layer Parameter for Semi-Theoretical Refrigerant/Lubricant Pool Boiling Model
Published: 8/1/2003
Author: Mark A Kedzierski
Abstract: This paper outlines the framework for an improvement in the thermalboundary layer parameter for a semi-theoretical model for predicting thepool boiling heat transfer of refrigerant/lubricant mixtures on aroughened, horizontal, flat pool-boiling surfa ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860902

52. Micro Channel Heat Transfer, Pressure Drop and Macro Prediction Methods
Published: 6/1/2003
Author: Mark A Kedzierski
Abstract: Advances in the basic understanding of fluid physics have opened an era of unprecedented application of heat transfer processes, and fluid dynamics systems using micro channels. One of the greatest obstacles to the application of leading edge fluid p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860901

53. A Semi-Theoretical Model for Predicting Refrigerant/Lubricant Mixture Pool Boiling Heat Transfer
Published: 5/1/2003
Author: Mark A Kedzierski
Abstract: This paper outlines the development of a semi-theoretical model for prediction the pool boiling heat transfer of R123/lubricant mixtures on a roughened, horizontal flat pool-boiling surface. The predictive model is based on the mechanisms involved i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860859

54. 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

55. 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

56. 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

57. 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

58. 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

59. 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

60. 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



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