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Author: piotr domanski

Displaying records 121 to 130 of 136 records.
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121. 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 ...

122. 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 ...

123. 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 ...

124. 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 ...

125. 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 ...

126. Glide Matching With Binary and Ternary Zeotropic Refrigerant Mixtures. Part 2. A Computer Simulation
Published: 1/1/1994
Authors: Piotr A Domanski, W. J. Mulroy, David Didion
Abstract: The glide-matching study presented in Part 1 was a laboratory investigation which demonstrated the evaporator performance in detail. However, since it was not possible to instrument the condenser sufficiently, some computer simulation work was conduc ...

127. Simulation of an Evaporator with Nonuniform One-Dimensional Air Distribution
Published: 1/13/1991
Author: Piotr A Domanski
Abstract: This paper presents a simulation model of a plate-fin, air-to-refrigerant heat exchanger used as an evaporator in residential air conditioning. The model can account for nonuniform air-distribution between coil tubes and simulates refrigerant distri ...

128. EVSIM: An Evaporator Simulation Model Accounting for Refrigerant and One Dimensional Air Distribution (NISTIR 89-4133)
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 89-4133
Published: 8/1/1989
Author: Piotr A Domanski
Abstract: The report describes a computer model, EVSIM, of a refrigerant-to-air heat exchanger of the type used in residential air conditioning as an evaporator. The model provides performance predictions of a one-slab or two-slab evaporator for a given refrig ...

129. An Experimental Investigation and Modeling of the Flow Rate of Refrigerant 22 Through the Short Tube Restrictor (NISTIR 89-4120)
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 89-4120
Published: 7/1/1989
Authors: D. A. Aaron, Piotr A Domanski
Abstract: Refrigerant 22 flow through short tube restrictors was investigated. The analysis pertained to initially subcooled refrigerant flowing through short tubes with 5 < L/D < 20. The flow conditions studied were those typically found in heat pumps. Flow ...

130. Rating of Mixed Split Residential Air Conditioners
Published: 9/13/1988
Author: Piotr A Domanski
Abstract: A methodology is presented for rating the performance of mixed, split residential air conditioners. The method accounts for the impact on system performance of the indoor evaporator, expansion device and fan; three major components that are likely to ...

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