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Author: mark kedzierski

Displaying records 71 to 80 of 91 records.
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71. A New Insitu Technique for Measuring the Concentration of Lubricant on a Boiling Heat Transfer Surface
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6110
Published: 1/1/1998
Authors: Mark A Kedzierski, Thomas J Bruno, Matt O'Neill
Abstract: The paper presents a technique for using the fluorescent properties and/or the harmonic focusing properties of several commercial lubricants to measure the concentration of lubricant on an aluminum vignetting target. It is planned to use the measure ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860122

72. Convective Boiling and Condensation Heat Transfer With a Twisted-Tape Insert for R12, R22, R152a, R134a, R290, R32/R134a, R32/R152a, R290/R134a, R134a/R600a
Published: 1/1/1998
Authors: Mark A Kedzierski, Min S. Kim
Abstract: Measured, local-average Nusselt numbers (Nu) for in-tube, convective boiling and condensation with a twisted-tape insert are presented for: R12, R22, R152a, R134a, R290, R32/R134a, R32/R152a, R290/R134a, and R134a/R600a. The heat transfer data were o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910464

73. Horizontal Convective Condensation of Alternative Refrigerants Within a Micro-Fin Tube
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6095
Published: 12/1/1997
Authors: Mark A Kedzierski, J Goncalves
Abstract: This paper presents Local convective condensation Measurements for four refrigerants: R134, R410A (R32/R125, 50/50 % mass), R125, and R32 in a micro-fin tube. Both heat transfer and pressure drop measurements are provided. The heat transfer degrada ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860754

74. Effect of Inclination on the Performance of a Compact Brazed Plate Condenser and Evaporator
Published: 1/1/1997
Author: Mark A Kedzierski
Abstract: This study experimentally quantified the change in heat transfer and pressure drop associated with tilting a compact brazed plate heat exchanger from the intended vertical position. Both clockwise and counterclockwise rotations within a plane perpend ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910466

75. Horizontal Flow Boiling of Alternative Refrigerants Within a Fluid Heated Micro-Fin Tube.
Published: 11/16/1996
Authors: M P Kaul, Mark A Kedzierski, David Didion
Abstract: This paper presents local, fluid-heated, flow boiling measurements for three refrigerant mixtures: [1] R410B (R32/125, 45/55 % mass), [2] R32R134a (28/72 % mass) and [3] R407C (R32/125/134a, 25/23/52 % mass). Flow boiling heat transfer coefficients f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910508

76. Enhancement of R123 Pool Boiling by the Addition of N-Hexane (NISTIR 5780)
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 5780
Published: 3/1/1996
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=910509

77. Single-Phase Heat Transfer and Pressure Drop Characteristics of an Integral-Spine Fin Within an Annulus (NISTIR 5454)
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 5454
Published: 1/1/1996
Authors: Mark A Kedzierski, M S Kim
Abstract: The laminar, single-phase heat transfer and friction characteristics of a porcupine-like surface (integral-spine-fin) within an annulus are presented. The heat-transfer coefficient was determined using a modified version of the Wilson Plot method on ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910507

78. Calorimetric and Visual Measurements of R123 Pool Boiling on Four Enhanced Surfaces (NISTIR 5732)
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 5732
Published: 11/1/1995
Author: Mark A Kedzierski
Abstract: Pool boiling of R123 on four commercial enhanced surfaces was investigated both calorimetrically and visually. The four surfaces were: (1) Turbo-BII(TM) (2) High-Flux(TM) (3) GEWA-K(TM), and (4) GEWA-T(TM). The surfaces were either machined or solder ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910534

79. Calorimetric and Visual Measurements of R123 Pool Boiling on Four Enhanced Surfaces.
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 5732
Published: 11/1/1995
Author: Mark A Kedzierski
Abstract: Pool boiling of R123 on four commercial enhanced surfaces was investigated both calorimetrically and visually. The four surfaces were: (1) Turbo-BII(TM) (2) High-Flux(TM) (3) GEWA-K(TM), and (4) GEWA-T(TM). The surfaces were either machined or solder ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916851

80. Effect of Inclination on the Performance of a Compact Brazed Plate Condenser and Evaporator (NISTIR 5767)
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 5767
Published: 11/1/1995
Author: Mark A Kedzierski
Abstract: This study experimentally quantified the change in heat transfer and pressure drop associated with tilting a compact brazed plate heat exchanger from the intended vertical position. Both clockwise and counterclockwise rotations within a plane perpend ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910537



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