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Search Publications by: Piotr A. Domanski (Assoc)

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Displaying 126 - 150 of 187

R-22 Replacement Status (in Chinese)

September 17, 2004
Author(s)
J M. Calm, Piotr Domanski
Since its initial recognition in 1928 and commercialization in 1936, R-22 has been applied in systems ranging from the smallest window air conditioners to the largest chillers and heat pumps, including those for district cooling and heating. Individual

R-22 Replacement Status

August 1, 2004
Author(s)
J M. Calm, Piotr A. Domanski
The next step in the transition to environmentally safer refrigerants is phase out of R-22. It is the most widely used refrigerant, both in the United States and on a global basis. Its application range in residential, commercial, industrial, and transport

MEMS Sensors for HVAC&R

May 1, 2004
Author(s)
David A. Yashar, Piotr A. Domanski
MicroElectronic Mechanical Systems (MEMS) have revolutionized the market for sensors by providing small, fast-responding measurement devices at very low cost. These measurement devices have been widely accepted in many areas of engineering and have vastly

An Optimized Design of Finned-Tube Evaporators Using the Learnable Evolution Model

April 1, 2004
Author(s)
Piotr A. Domanski, David A. Yashar, Kenneth Kaufman, RK S. Michalski
Optimizing the refrigerant circuitry for a finned-tube evaporator is a daunting task for traditional exhaustive search techniques due to the extremely large number of circuitry possibilities. For this reason, more intelligent search techniques are needed

CYCLE_D: NIST Vapor Compression Cycle Design Program Version 3.0 Users' Guide.

December 1, 2003
Author(s)
Piotr A. Domanski, David Didion, J Chi
The CYCLE_D package simulates the vapor compression refrigeration cycles that use pure refrigerants or mixtures of refrigerants. The model can simulate a basic refrigeration cycle as well as a cycle with a liquidline/suction-line heat exchanger. CYCLE_D

A Study of In-Tube Evaporation Heat Transfer of Carbon Dioxide

August 17, 2003
Author(s)
N N. Sawant, M Kim, William V. Payne, Piotr A. Domanski, Y W. Hwang
The evaporative heat transfer characteristics of carbon dioxide (CO 2) were measured in a fluid-heated, 8.0 mm ID smooth stainless steel tube. The test apparatus was a concentric tube heat exchanger heated by water in the annulus with CO 2 in the central

Effects of Non-Uniform Air Flow on Finned-Tube Evaporator Performance

August 1, 2003
Author(s)
John Choi, William V. Payne, Piotr A. Domanski
An experimental investigation was implemented to determine the capacity degradation due to non-uniform refrigerant and air flow distributions, and to assess the potential to recover the lost capacity via controlling refrigerant distribution between

Fundamental Aspects of the Application of Carbon Dioxide in Comfort Cooling

August 1, 2003
Author(s)
J S. Brown, Piotr A. Domanski
This paper presents entropy generation analyses for the evaporator, compressor, gas cooler, expansion device and liquid-line suction-line heat exchanger for a transcritical carbon dioxide cycle for automotive and residential air-conditioning systems, and

Simulation of Heat Exchangers of a Window Air Conditioner Retrofitted with R-407C

May 1, 2003
Author(s)
S Devotta, A S. Padalkar, N K. Sane, Piotr A. Domanski, N N. Sawant
This paper presents the results of simulation of heat exchangers of an HCFC-22 window air conditioner retrofitted with R-407C. The test conditions considered are as per the Indian Standard IS 1391 (1992) for unitary air conditioners. The simulation has

Potential Benefits of Smart Refrigerant Distributors

January 1, 2003
Author(s)
William V. Payne, Piotr A. Domanski
The main goal of this study was to investigate the benefits possible for finned tube refrigerant evaporators when refrigerant distribution was precisely controlled to produce a desired equal superheat in each circuit. This goal was accomplished by
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