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You searched on: Author: piotr domanski

Displaying records 111 to 120 of 136 records.
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111. ASHRAE/NIST Refrigerants Conference: Refrigerants for the 21st Century. Gaithersburg MD, October 6-7, 1997. Conference Report.
Published: 9/30/1998
Author: Piotr A Domanski
Abstract: The "Refrigerants for the 21st Century" conferece was the third refrigerants conference jointly organized by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) and the National Institute of Standards and Technology ...

112. Refrigerants for the 21st Century / ASHRAE/NIST Refrigerants Conference
Series: Journal of Research (NIST JRES)
Published: 9/1/1998
Author: Piotr A Domanski
Abstract: The goal of the 1997 ASHRAE/NIST Refrigerants Conference was to review available air-conditioning and refrigeration options in response to ozone depletion, global warming, and technology advances. The two-day program consisted of 16 invited comprehe ...

113. Potential Coefficient of Performance Improvements due to Glide Matching With R-407C
Published: 7/1/1998
Authors: M E Marques, Piotr A Domanski
Abstract: Potential improvements of the Coefficient of Performance (COP) were investigated for R-407C at cooling and heating conditions of a residential heat pump. The study used CYCLE-11, a semi-theoretical vapor-compression cycle model, which was upgraded t ...

114. A Study of a Water-to-Water Heat Pump Using Flammable Refrigerants
Published: 6/1/1998
Authors: William V Payne, Piotr A Domanski, J Muller
Abstract: This investigation compared the performance of R22 to the performance of R290 and that of flammable zeotropic mixtures, R32/290 and R32/152a. The tests were conducted in a test apparatus specially designed to simulate a residential water-to-water hea ...

115. Method for Estimating the Energy Efficiency Ratio of Mixed System Air Conditioners and Heat Pumps (NISTIR 6045)
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6045
Published: 9/1/1997
Authors: Piotr A Domanski, B. S. Kim
Abstract: In lieu of testing each split system air conditioner and heat pump combination, an empirically based calculation procedure may be used for estimating a unit's Energy Efficiency Ratio at the 35 deg C (95 deg F) rating condition, EER(95). The procedure ...

116. Ternary Zeotropic Mixture With CO2 Component for R-22 Heat Pump Application
Published: 8/30/1997
Authors: K Maczeck, J Muller, K Wojtas, Piotr A Domanski
Abstract: The objective of this research project was to demonstrate a successful operation of a high efficiency heat pump employing a zeotropic mixture with a zero ozone-depletion and a small greenhouse warming potential (ODP and GWP, respectively). The projec ...

117. 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 ...

118. 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 ...

119. 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 ...

120. 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 ...

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