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Search Publications by: Piotr A. Domanski (Assoc)

Displaying 126 - 150 of 182

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 Refrigerant and Air Flow Distributions on Finned-Tube Evaporator Performance.

August 17, 2003

Author(s)

J M. Choi, William V. Payne, Piotr A. Domanski

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

August 17, 2003

Author(s)

N N. Sawant, Min S. Kim, William V. Payne, Piotr A. Domanski, Y W. Hwang

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

Evaluation of Carbon Dioxide as R-22 Substitute for Residential Air-Conditioning.

December 1, 2002

Author(s)

J S. Brown, Y Kim, Piotr A. Domanski

This paper compares the performance of CO2 and R-22 in residential air-conditioning applications using semi-theoretical vapor compression and transcritical cycle models. The simulated R-22 system had a conventional component configuration, while the CO2

Evaluation of Carbon Dioxide as R-22 Substitute for Residential Air-Conditioning.

December 1, 2002

Author(s)

J S. Brown, Y Kim, Piotr A. Domanski

Properties and Cycle Performance of Refrigerant Blends Operating Near and Above the Refrigerant Critical Point

September 1, 2002

Author(s)

Piotr A. Domanski, William V. Payne

Performance of R22 and R410A split air conditioners was evaluated experimentally at the ambient temperature range from 82 F to 135 F. Capacity and EER decreased as the outdoor temperature increased. The capacity of the R410A system relative to the capacity

Comparison of an R22 and an R410A Air Conditioner Operating at High Ambient Temperatures.

July 16, 2002

Author(s)

Piotr A. Domanski, W V. Payne

R22 and R410A split air-conditioning systems were tested and compared as outdoor temperature ranged form 27.8 oC (82.0 oF) to 54.4 oF (130 oF). The R410A system tests were extended t 68.3 oC (155.0 oF) ambient temperature with a customized compressor

Comparison of an R22 and an R410A Air Conditioner Operating at High Ambient Temperatures.

July 16, 2002

Author(s)

William V. Payne, Piotr A. Domanski

A Comparison of an R22 and an R410A Air Conditioner Operating at High Ambient Temperatures

July 1, 2002

Author(s)

William V. Payne, Piotr A. Domanski

R22 and R410A split air-conditioning systems were tested and compared as outdoor temperature ranged form 27.8 C (82.0 F) to 54.4 F (130 F). The R410A system tests were extended t 68.3 C (155.0 F) ambient temperature with a customized compressor. Capacity

Evaluation of Carbon Dioxide as R-22 Substitute for Residential Air-Conditioning

June 1, 2002

Author(s)

J S. Brown, Y Kim, Piotr A. Domanski

This paper compares performance of CO2 and R22 in residential air conditioning applications using semi-theoretical vapor compression and transcritical cycle models. The simulated R22 system had a conventional component configuration, while the CO2 system

Rating Water-Source Heat Pumps Using ARI Standard 320 and ISO Standard 13256-1.

March 25, 2002

Author(s)

William V. Payne, Piotr A. Domanski

Comparitive Analysis of an Automative Air Conditioning Systems Operating With CO2 and R134a.

January 1, 2002

Author(s)

Piotr A. Domanski, J S. Brown, S F. Yana-Motta

This paper evaluates performance merits of CO2 and R134a automotive air conditioning systems using semi-theoretical cycle models. The R134a system had a current-production configuration, which consisted of a compressor, condenser, expansion device, and

A Generalized Pressure Drop Correlation for Evaporation of Alternative Refrigerants in Micro-Fin and Smooth Tubes

October 1, 2001

Author(s)

J Y. Choi, Mark A. Kedzierski, Piotr A. Domanski

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 50/50

Generalized Pressure Drop Correlation for Evaporation and Condensation in Smooth and Micro-Fin Tubes

October 1, 2001

Author(s)

J Y. Choi, Mark A. Kedzierski, Piotr A. Domanski

A Comparison of Rating Water-Source Heat Pumps Using ARI Standard 320 and ISO Standard 13256-1

September 1, 2001

Author(s)

William V. Payne, Piotr A. Domanski

This investigation compares the ARI 320 (1998) and the ISO 13256-1 (1998) heating and cooling standards for water-source heat pumps to determine the difference in capacity and efficiency for a given heat pump tested with these standards. Multiple tests

Comparitive Analysis of an Automotive Air Conditioning Systems Operating with CO 2 and R134a

January 1, 2001

Author(s)

J S. Brown, S F. Yana Motta, Piotr A. Domanski

This paper evaluates performance merits of CO 2 and R134a automotive air conditioning systems using semi-theoretical cycle models. The R134a system had a current-production configuration which consisted of a compressor, condenser, expansion device, and

Impact of Elevated Ambient Temperatures on Capacity and Energy Input to a Vapor Compression System -- Literature Review

August 1, 2000

Author(s)

S F. Yana Motta, Piotr A. Domanski

Operation of a system at elevated ambient temperatures inherently results in a lower coefficient of performance (COP). This conclusion comes directly from examining the Carnot cycle. The COP relation, COP=T evap/(T cond-T evap) indicates that the COP

Performance of R-22 And Its Alternatives Working At High Outdoor Temperatures

July 1, 2000

Author(s)

S F. Yana Motta, Piotr A. Domanski

This paper examines the performance of R-22 and its possible replacements in an air-cooled air conditioner. The study focuses on the effect ofelevated outdoor temperatures on system capacity and Coefficient of Performance (COP). The refrigerants considered