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Author: mark kedzierski

Displaying records 51 to 60 of 91 records.
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51. Effect of Refrigerant Oil Additive on R134a and R123 Boiling Heat Transfer Performance and Related Issues for GSA.
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7132
Published: 12/1/2004
Author: Mark A Kedzierski
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101412

52. Pressure Drop During Refrigerant Condensation Inside Horizontal Smooth, Helical Micro-Fin, and Herringbone Micro-Fin Tubes
Published: 10/6/2004
Authors: J A Olivier, L Liebenberg, Mark A Kedzierski, J P Meyer
Abstract: This paper presents a study of pressure drops during condensation inside a smooth, an 18 helical micro-fin, and a herringbone micro-fin tube. Measurements were conducted with refrigerant flowing through the inner tube (inner diameter of 8 to 9 mm) ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860928

53. Letter Report of a Life Cycle Cost Analysis for GSA Chillers
Published: 9/2/2004
Author: Mark A Kedzierski
Abstract: A life-cycle-cost analysis revealed that the combined GSA regions would save nearly half a billion dollars over 15 years in electricity costs with a hypothetical 30 % increase in chiller efficiency. The largest savings were apparent for GSA regions ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860954

54. 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

55. 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

56. 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

57. 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

58. 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

59. 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

60. 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



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