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Search Publications by: Piotr A. Domanski (Assoc)

Displaying 276 - 300 of 361

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

Semi-Theoretical Simulation Model for a Transcritical Carbon Dioxide Mobile A/C System

March 1, 2000

Author(s)

J S. Brown, Piotr A. Domanski

This paper describes a semi-theoretical simulation model, CYCLE11_CO2, for a transcritical carbon dioxide vapor-compression refrigeration cycle. CYCLE_11CO2 is based on an earlier simulation model, CYCLE11-UA, developed at the National Institute of

A Water-to-Water Heat Pump Using Hydrocarbon and Hydrofluorocarbon Zeotropic Mixtures With and Without an Internal Heat Exchanger

January 1, 2000

Author(s)

William V. Payne, Piotr A. Domanski, E A. Silk

This investigation overviews the comprehensive results of the experimental study pertaining to flammable refrigerant alternatives in water-to-water heat pumps for building and home applications. In contrast to the comprehensive fluid survey of the initial