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Author: Piotr Domanski

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1. Performance Improvement of a Roof Top Air-Conditioning Unit by Refrigerant Circuitry Optimization
Published: 1/26/2013
Authors: Sunil Lee, David A Yashar, Piotr A Domanski
Abstract: In this experiment-aided simulation study, we achieved the performance improvement of a Roof Top Unit (RTU) by optimizing an evaporator’s refrigerant circuitry using evolutionary algorithms. The system used in this study was a 2-stage 7.5 Ton RTU wit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912072

2. FDD CX: A Fault Detection and Diagnostic Commissioning Tool for Residential Air Conditioners and Heat Pumps
Series: Technical Note (NIST TN)
Report Number: 1774
Published: 11/21/2012
Authors: William V Payne, Jae Hyeok Heo, Piotr A Domanski
Abstract: FDD CX is a commissioning tool for unitary, air-source, single-speed, vapor compression air conditioner (AC) or heat pump (HP) systems. This software tool can be utilized to commission the operation of residential ACs or HPs to ensure proper ref ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912311

3. A Dual Mode Evolutionary Algorithm Approach for Designing Optimized Finned-Tube Heat Exchangers
Published: 9/27/2012
Authors: David A Yashar, Piotr A Domanski, Janusz Wojusiak, Kenneth Kaufman
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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907663

4. NIST Standard Reference Database 73 REFLEAK: NIST Leak/Recharge Simulation Model for Refrigerant Mixtures, Version 4.0
Published: 1/16/2012
Authors: David Didion, MinSoo Kim, Piotr A Domanski
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909788

5. Alternative Cooling Technology Options
Published: 8/21/2011
Authors: J S Brown, Piotr A Domanski
Abstract: This paper considers the alternative cooling technologies studied by Fisher et al. (1994) and assesses their current potential to compete with or to replace vapor compression refrigeration technology for space cooling and near-room temperature refrig ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907958

6. Practical Aspects of Applying Evolutionary Algorithms for Optimizing Refrigerant Circuitry in Heat Exchangers
Published: 8/21/2011
Authors: Piotr A Domanski, David A Yashar, Sunil Lee, Janusz Wojtusiak
Abstract: A public domain finned-tube heat exchanger simulation program, EVAP-COND ver. 3.0, has been equipped with an evolutionary algorithm-based module, called ISHED – Intelligent System for Heat Exchanger Design, which facilitates optimization of refrigera ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908309

7. IMPACT OF CLASSICAL ASSUMPTIONS IN MODELLING A MICROCHANNEL GAS COOLER
Published: 7/5/2011
Authors: Santiago Martinez-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 2D longitudinal heat conduction in the tube and the longitudinal heat conduction in the fin. These models, also do not ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907650

8. IEA HPP Annex 36: Quality Installation / Quality Maintenance Sensitivity Analysis
Published: 6/27/2011
Authors: Glenn Hourahan, Piotr A Domanski, Van Baxter
Abstract: The paper summarizes the goals and planned activities to be undertaken by the participants in Annex 36. Some background information and status of Annex work specific to each participant is provided as well.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908110

9. Characterization of Approach Air Distribution for a Finned-Tube Heat Exchanger
Published: 2/18/2011
Authors: David A Yashar, Piotr A Domanski, Hong H. Cho
Abstract: The distribution of air flow approaching a finned-tube heat exchanger is one of the predominant factors influencing the heat exchanger’s performance. This paper describes a method for measuring and predicting the inlet air flow distribution using Par ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903642

10. Residential Heat Pump Heating Performance with Single Faults Imposed
Published: 10/29/2010
Authors: William V Payne, Piotr A Domanski, Seok Ho Yoon
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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906002