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Author: piotr domanski

Displaying records 21 to 30 of 136 records.
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Published: 7/12/2010
Authors: Santiago M. Ballester, Jose M. Corberan, Jose Gonzalvez-Macia, Piotr A Domanski
Abstract: Most of the current air-to-refrigerant heat exchanger models use the classic ε-NTU approach. These models do not account for longitudinal conduction neither in the fin nor in the tube, transverse conduction in the tube, and for the heat conducti ...

22. Air Flow Distribution through an A-Shaped Evaporator under Dry and Wet Coil Conditions
Published: 7/11/2010
Authors: David A Yashar, Piotr A Domanski
Abstract: This paper presents a study of the air flow distribution through a residential air-conditioning heat exchanger. The test subject was a finned-tube, A-shaped coil outfitted with a condensation collection pan required for horizontal installation. We ...

23. Residential Heat Pump Heating Performance with Single Faults Imposed
Published: 7/11/2010
Authors: Seok Ho Yoon, William V Payne, Piotr A Domanski
Abstract: A heat pump equipped with a thermostatic expansion valve (TXV) was tested in environmental chambers during steady-state no-fault and imposed-fault operation. The studied system was an R410A split residential heat pump with an 8.8 kW nominal cooling ...

24. Evolutionary Computation Approach to Heat Exchanger Design
Published: 6/26/2010
Authors: David A Yashar, Janusz Wojusiak, Kenneth Kaufman, Piotr A Domanski
Abstract: The efficiency of a vapor compression system is strongly influenced by the performance of the finned-tube heat exchangers it employs. Heat exchanger performance is strongly influenced by the refrigerant circuitry, i.e., the connection sequence of th ...

25. Evaporator Optimization for Non-Uniform Air Distribution
Published: 6/13/2010
Authors: Piotr A Domanski, David A Yashar, Sunil Lee
Abstract: This study demonstrates the performance improvements that can be achieved by accounting for the in-situ air flow distribution during the design phase of a heat exchanger. The heat exchanger used in this study was a two-slab, A-shaped finned-tube eva ...

26. Development of the Reference Model for a Residential Heat Pump System for Cooling Mode Fault Detection and Diagnosis
Published: 4/2/2010
Authors: M Kim, Seok H. Yoon, Piotr A Domanski, William V Payne
Abstract: Development of a reference model to predict the value of system parameters during fault free operation is a basic step for fault detection and diagnosis (FDD). In order to develop an accurate and effective reference model of a heat pump system, expe ...

27. Measurement Science Roadmap for Net-Zero Energy Buildings
Series: Technical Note (NIST TN)
Report Number: 1660
Published: 3/18/2010
Authors: Joan Pellegrino, Arthur Hunter Fanney, Andrew Keith Persily, Piotr A Domanski, William M Healy, Steven T Bushby
Abstract: Buildings account for nearly a third of the world s energy use today, and this share is expected to rise along with population growth and levels of prosperity. In the United States, residential and commercial buildings consume about 40% of primary en ...

28. REFLEAK: NIST Leak/Recharge Simulation Program for Refrigerant Mixtures Version 3.2
Series: Natl Std. Ref. Data Series (NIST NSRDS)
Published: 10/16/2009
Authors: David Didion, Min S. Kim, Piotr A Domanski
Abstract: REFLEAK simulates leak and recharge processes for refrigerant zeotropic mixtures, and estimates composition changes for vapor and liquid under either isothermal or adiabatic leak conditions. Calculated vapor and liquid compositions are displayed in a ...

29. Particle Image Velocimetry Measurements and CFD-Based Predictions of Air Distribution at Evaporator Inlet and Outlet
Series: Technical Note (NIST TN)
Report Number: 1651
Published: 10/5/2009
Authors: David A Yashar, Piotr A Domanski
Abstract: We examined the air flow distribution through a residential indoor air conditioning heat exchanger. The test heat exchanger was a finned tube, A-shaped coil outfitted with a condensation collection pan required for a horizontal installation configura ...

30. Heating Mode Performance Measurements For A Residential Heat Pump With Single-Faults Imposed
Series: Technical Note (NIST TN)
Report Number: 1648
Published: 9/30/2009
Authors: William V Payne, Piotr A Domanski, Seok Ho Yoon
Abstract: The objective of this research was to acquire heating mode experimental data for a residential heat pump needed for the development of a FDD methodology. Within this project, a heat pump equipped with a thermostatic expansion valve (TXV) was tested ...

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