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Author: piotr domanski

Displaying records 111 to 120 of 131 records.
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111. Impact of Air and Refrigerant Maldistributions On the Performance of Finned-Tube Evaporators With R-22 and R-407C
Series: OTHER
Published: 7/1/1997
Authors: J Lee, Piotr A Domanski
Abstract: The report presents basic features of the evaporator model, EVAP5M, and simulation results for an evaporator operating with R-22 and R-407C at non-uniform air and refrigerant distributions. EVAP5M was developed under this project to provide a tool fo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910468

112. Performance of R-22 Alternative Refrigerants in a System With Cross-Flow and Counter-Flow Heat Exchangers (NISTIR 5945)
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 5945
Published: 1/1/1997
Authors: M H Kim, Piotr A Domanski, David Didion
Abstract: This report presents results of performance tests of R-22 and four alternative fluids, R-134a, R-32/134a (30/70), R-407C, and R-410A, at operating conditions typical for a residential heat pump. The study was performed in an experimental breadboard w ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910467

113. Limiting Throttling Losses by Intracycle Evaporative Cooling
Published: 10/20/1996
Authors: B. S. Kim, Piotr A Domanski
Abstract: The temperature glide of zeotropic mixtures during phase change provides the opportunity to limit throttling losses of the refrigerant leaving the condenser. The difference between the intracycle evaporative cooling and the liquid-line/suction-line h ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910512

114. Evaluation of Flammable Refrigerants for Use in a Water-to-Water Residential Heat Pump
Published: 9/3/1996
Authors: D K Choi, Piotr A Domanski, David Didion
Abstract: This paper evaluates the performance of R-22, R-290, R-290/600a (70/30), and R-32/152a (50/50) for application in a water-to-water residential heat pump for space cooling and heating. The tests were performed in a laboratory apparatus at different co ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910472

115. Intracycle Evaporative Cooling in a Vapor Compression Cycle (NISTIR 5873)
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 5873
Published: 9/1/1996
Authors: B. S. Kim, Piotr A Domanski
Abstract: The temperature glide of zeotropic mixtures during phase change provides the opportunity to limit throttling losses of the refrigeration cycle by intracycle evaporative cooling of the refrigerant leaving the condenser. Intracycle evaporative cooling ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910511

116. Minimizing Throttline Losses in the Refrigeration Cycle
Published: 8/1/1995
Author: Piotr A Domanski
Abstract: Most alternative non-CFC refrigerants have a large molecular structure and large heat capacity, which influence the slope of saturated liquid line and result in substantial throttling losses in a basic reversed Rankine cycle. These losses degrade the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910532

117. Theoretical Evaluation of the Vapor Compression Cycle With a Liquid-Line/Suction-Line Heat Exchanger, Economizer, and Ejector (NISTIR 5606)
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 5606
Published: 3/1/1995
Author: Piotr A Domanski
Abstract: The report presents a theoretical analysis of three vapor compression cycles which are derived from the Rankine cycle by incorporating a liquid-line/suction-line heat exchanger, economizer, or ejector. These addendums to the basic cycle reduce thrott ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910533

118. Simulation Model and Study of Hydrocarbon Refrigerants for Residential Heat Pump Systems
Published: 5/10/1994
Authors: Piotr A Domanski, David Didion, W. J. Mulroy, J Parise
Abstract: To conduct a systematic study of Natural Fluids as working fluids for heat pumping applications, it was necessary for NIST to simultaneously expand its analytical tools and evaluate what design changes American industry would most readily accept. The ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910584

119. Evaluation of Suction Line-Liquid Line Heat Exchange in the Refrigeration Cycle
Published: 1/1/1994
Authors: Piotr A Domanski, David Didion, J. P. Doyle
Abstract: The paper presents a theoretical evaluation of the performance effects resulting from the installation of a liquid-line/suction-line heat exchanger (LLSL-HX). It examines cycle parameters and refrigerant thermodynamic properties that determine wheth ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910591

120. Glide Matching With Binary and Ternary Zeotropic Refrigerant Mixtures. Part 1. An Experimental Study
Published: 1/1/1994
Authors: W. J. Mulroy, Piotr A Domanski, David Didion
Abstract: An improvement of the coefficient of performance (COP) of the refrigeration cycle can be realized when temperature profiles of the refrigerant mixture and the heat transfer fluid (HTF) are matched. For the same temperature lift, the benefit of glide ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910586



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