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1. Rooftop Air-Conditioning Unit Performance Improvement using Refrigerant Circuitry Optimization
Published: 3/20/2015
Authors: David A Yashar, Sunil Lee, Piotr A Domanski
Abstract: This study demonstrates the performance improvement of an air-to-air 7.5 Ton (26.4 kW) rooftop unit (RTU) achieved by optimizing an evaporator‰s refrigerant circuitry using evolutionary algorithms. We measured its cooling capacity and Coefficient of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917578

2. Summary Article: IEA HPP Annex 36, Quality Installation/Quality Maintanace Sensitivity Studies
Published: 2/25/2015
Authors: Glenn Hourahan, Piotr A Domanski, Van Baxter
Abstract: It is widely recognized that residential and commercial heat pump equipment experience significant ,in-fieldŠ performance loss (i.e., capacity and efficiency) depending on how the components are sized, matched, installed, and subsequently field-m ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917843

3. Effect of Installation Faults on Air-to-Air Heat Pump Performance
Published: 1/20/2015
Author: Piotr A Domanski
Abstract: Numerous studies and surveys indicate that typically-installed HVAC equipment operate inefficiently and waste considerable energy due to different installation errors (faults) such as improper refrigerant charge, incorrect airflow, oversized equi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917726

4. Sensitivity Analysis of Installation Faults on Heat Pump Performance
Series: Technical Note (NIST TN)
Report Number: 1848
Published: 10/8/2014
Authors: Piotr A Domanski, Hugh Henderson, William V Payne
Abstract: Numerous studies and surveys indicated that typically-installed HVAC equipment operates inefficiently and wastes considerable energy due to different installation errors (faults), e.g., improper refrigerant charge, incorrect airflow, oversized eq ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916511

5. An Experimental and Computational Study of Approach Air Distribution for Slanted and A-Shaped Finned-Tube Heat Exchangers
Published: 7/1/2014
Authors: David A Yashar, Piotr A Domanski, Hong Hyun Cho
Abstract: One of the most influential factors of the performance of a finned tube heat exchanger is the distribution of the air passing through it; therefore it must be known in order to produce a highly efficient design. We examined two different common styl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913438

6. Normalized Performance Parameters for a Residential Heat Pump in the Cooling Mode with Single Faults Imposed
Published: 3/3/2014
Authors: William V Payne, Jin Min Cho, Piotr A Domanski
Abstract: The performance of a residential split heat pump in the cooling mode operating under nine faults was described using normalized performance parameters determined from a ratio of the faulty value to the no-fault value obtained from heat pump tests in ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910617

7. A Thermodynamic Analysis of Refrigerants: Possibilities and Tradeoffs for Low-GWP Refrigerants
Published: 2/26/2014
Authors: Mark O McLinden, Andrei F Kazakov, J S Brown, Piotr A Domanski
Abstract: We explore the possibilities for refrigerants having low global warming potential (GWP). A set of about 1200 candidate fluids is identified from more than 56 000 small molecules examaned by applying screening criteria to estimates for GWP, flammabili ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914052

8. Thermodynamic Performance Limits of the Vapor Compression Cycle
Published: 1/19/2014
Authors: Piotr A Domanski, J S Brown, Jae Hyeok Heo, Mark O McLinden
Abstract: This presentation discusses the thermodynamic performance limits of the vapor compression cycle. We have applied evolutionary algorithms to explore the performance of hypothetical refrigerants defined by the thermodynamic parameters used by the e ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915274

9. Review of alternative cooling technologies
Published: 12/18/2013
Authors: S J Brown, Piotr A Domanski
Abstract: This paper considers the alternative cooling technologies studied by Fisher et al. (1994) and assesses their current performance and market potential in reference to vapor compression technology. First, a taxonomy of cooling technologies based on th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911252

10. A THERMODYNAMIC ANALYSIS OF REFRIGERANTS: PERFORMANCE LIMITS OF THE VAPOR COMPRESSION CYCLE
Published: 10/24/2013
Authors: Piotr A Domanski, J S Brown, Janusz Wojtusiak, Mark O McLinden
Abstract: This paper explores the thermodynamic performance limits of the vapor compression cycle. In particular, we apply evolutionary algorithms to explore the performance of thousands of hypothetical refrigerants defined by their thermodynamic parameter ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913958



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