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Search Publications by: Piotr A. Domanski (Assoc)

Displaying 26 - 50 of 182

CYCLE_D: NIST Vapor Compression Cycle Design Program, Version 5.1.1; Users Guide

March 9, 2017

Author(s)

Piotr A. Domanski, J S. Brown, Eric W. Lemmon

The CYCLE_D package simulates vapor compression refrigeration cycles that use pure refrigerants or blends of refrigerants. The model can simulate a basic subcritical or transcritical refrigeration cycle, both with or without a liquid-line/suction-line heat

Limited options for low-global-warming-potential refrigerants

February 17, 2017

Author(s)

Mark O. McLinden, J S. Brown, Riccardo Brignoli, Andrei F. Kazakov, Piotr A. Domanski

Hydrofluorocarbons, currently used as refrigerants in air-conditioning systems, are potent greenhouse gases, and their contribution to climate change is projected to increase. Future use of the hydrofluorocarbons will be phased down and, thus, replacement

REFLEAK: NIST Leak/Recharge Simulation Model for Refrigerant Blends, Version 5.0

December 14, 2016

Author(s)

Piotr A. Domanski, J S. Brown

As alternatives to refrigerants with a high global warming potential, blends of two or more refrigerants are being utilized as working fluids in heat-pumping, air-conditioning, and refrigeration systems, and organic Rankine cycles. Generally, these blends

Optimized Air-to-Refrigerant Heat Exchanger With Low-GWP Refrigerants

August 20, 2016

Author(s)

Piotr A. Domanski, Hong Hyun Cho

This paper presents an analytical evaluation of the performance of low-GWP refrigerants in a finned-tube evaporator used for residential cooling applications. The study employed an evolutionary-computation optimization module to examine the effect of a

EVAP-COND, Version 4.0; Simulation Models for Finned-Tube Heat Exchangers with Circuitry Optimization

June 28, 2016

Author(s)

Piotr A. Domanski, David A. Yashar, Janusz Wojtusiak

EVAP-COND is a software package that contains NIST's simulation models for a finned-tube evaporator and condenser. The tube-by-tube modeling scheme allows for specifying complex refrigerant circuits, modeling refrigerant distribution between these

NIST Standard Reference Database 49 CYCLE_D: NIST Vapor Compression Cycle Design Program Version 5.1

June 23, 2016

Author(s)

Piotr A. Domanski, J S. Brown, Eric W. Lemmon

CYCLE_D simulates vapor compression refrigeration cycles that use single-compound refrigerants or refrigerant blends. The model can simulate a basic subcritical or transcritical refrigeration cycle, both with or without a liquid-line/suction-line heat

Transition to Low-GWP Refrigerants: Options and Tradeoffs

April 6, 2016

Author(s)

Piotr A. Domanski

Hydrofluorocarbons (HFCs), which are commonly used as refrigerants in air-conditioning equipment, are potent greenhouse gases and will need to be replaced. In search of suitable replacements, a recent study performed a comprehensive screening of a database

Effect of Common Faults on the Performance of Different Vapor Compression Systems

December 31, 2015

Author(s)

Zhimin Du, Piotr A. Domanski, William V. Payne

The effect of faults on cooling capacity, COP, sensible heat ratio, and superheat/subcooling temperatures in five split and rooftop systems, which use different types of expansion devices, compressors and refrigerants, are separately compared and analyzed

Self-Training of a Fault-Free Model for Residential Air Conditioner Fault Detection and Diagnostics

September 15, 2015

Author(s)

William V. Payne, Piotr A. Domanski, Jaehyeok Heo, Zhimin Du

This study is meant to be applied to residential, unitary, air-source, single-speed, vapor compression air-conditioning systems with nominal cooling capacities less than 19 kW (65,000 Btuh-1 or 5.4 tons). In this research, a method for self-training FDD

Hitting the bounds of chemistry: Limits and tradeoffs for low-GWP refrigerants.

August 19, 2015

Author(s)

Mark O. McLinden, J. Steven Brown, Andrei F. Kazakov, Piotr A. Domanski

We explore the possibilities for low-GWP refrigerants through two approaches. First, we explore the performance of hypothetical refrigerants to define the limits of what is allowed by thermodynamics. In the second approach, we apply property estimation

EFFECT OF INSTALLATION FAULTS ON THE PERFORMANCE OF A SPLIT AIR CONDITIONER

August 18, 2015

Author(s)

Piotr A. Domanski, Hugh Henderson, William V. Payne

The study analyzed the effect of common installation faults on the cooling performance of a residential, split air conditioner installed in a single-family, slab-on-grade house. We considered five climatic regions in the United States from hot/humid to

Effect of Heat Pump Commissioning Faults on Energy Use in a Slab-on-Grade Residential House

July 8, 2015

Author(s)

Piotr A. Domanski, Hugh Henderson, William V. Payne

This study seeks to develop an understanding of the effect of these common faults on the energy consumption of a heat pump installed in a single-family, slab-on-grade residential house. Through annual simulations of the house/heat pump system, the study

Rooftop Air-Conditioning Unit Performance Improvement using Refrigerant Circuitry Optimization

March 20, 2015

Author(s)

David A. Yashar, Sunil Lee, Piotr A. Domanski

This study demonstrates the performance improvement of an air-to-air 7.5 Ton (26.4 kW) rooftop unit (RTU) achieved by optimizing an evaporators refrigerant circuitry using evolutionary algorithms. We measured its cooling capacity and Coefficient of

Summary Article: IEA HPP Annex 36, Quality Installation/Quality Maintanace Sensitivity Studies

February 25, 2015

Author(s)

Glenn Hourahan, Piotr A. Domanski, Van Baxter

It is widely recognized that residential and commercial heat pump equipment experience significant "in-field" performance loss (i.e., capacity and efficiency) depending on how the components are sized, matched, installed, and subsequently field-maintained

An Experimental and Computational Study of Approach Air Distribution for Slanted and A-Shaped Finned-Tube Heat Exchangers

January 25, 2015

Author(s)

David A. Yashar, Piotr A. Domanski, Hong Hyun Cho

Effect of Installation Faults on Air-to-Air Heat Pump Performance

January 20, 2015

Author(s)

Piotr A. Domanski

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 equipment

Sensitivity Analysis of Installation Faults on Heat Pump Performance

October 8, 2014

Author(s)

Piotr A. Domanski, Hugh Henderson, William V. Payne

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 equipment

An Experimental and Computational Study of Approach Air Distribution for Slanted and A-Shaped Finned-Tube Heat Exchangers

July 1, 2014

Author(s)

David A. Yashar, Piotr A. Domanski, Hong Hyun Cho

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 style air

Normalized Performance Parameters for a Residential Heat Pump in the Cooling Mode with Single Faults Imposed

March 3, 2014

Author(s)

William V. Payne, Jin M. Cho, Piotr A. Domanski

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

A Thermodynamic Analysis of Refrigerants: Possibilities and Tradeoffs for Low-GWP Refrigerants

February 26, 2014

Author(s)

Mark O. McLinden, Andrei F. Kazakov, J S. Brown, Piotr A. Domanski

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, flammability

Thermodynamic Performance Limits of the Vapor Compression Cycle

January 19, 2014

Author(s)

Piotr A. Domanski, J S. Brown, Jae H. Heo, Mark O. McLinden

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 extended

Review of alternative cooling technologies

December 18, 2013

Author(s)

S J. Brown, Piotr A. Domanski

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 the main

A thermodynamic analysis of refrigerants: Possibilities and tradeoffs for Low-GWP refrigerants

October 26, 2013

Author(s)

Mark O. McLinden, Andrei F. Kazakov, J. Steven Brown, Piotr A. Domanski, Jae H. Heo

We explore the possibilities for refrigerants having low global warming potential (GWP) using two distinct, but complimentary, approaches. We evaluate the effect of a refrigerant's fundamental thermodynamic parameters on its performance in the simple vapor

A THERMODYNAMIC ANALYSIS OF REFRIGERANTS: PERFORMANCE LIMITS OF THE VAPOR COMPRESSION CYCLE

October 24, 2013

Author(s)

Piotr A. Domanski, J S. Brown, Janusz Wojtusiak, Mark O. McLinden

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 parameters used by

A Thermodynamic Analysis of Refrigerants. II. Possibilities and Tradeoffs for Low-GWP Refrigerants

June 17, 2013

Author(s)

Mark O. McLinden, Andrei F. Kazakov, J. Steven Brown, Piotr A. Domanski

We explore the possibilities for refrigerants having low global warming potential (GWP) by use of two distinct approaches. In a companion paper (Domanski et al., 2013) we evaluate the effect of a refrigerants fundamental thermodynamic parameters on its