U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

CYCLE_D-HX: NIST Vapor Compression Cycle Model Accounting for Refrigerant Thermodynamic and Transport Properties, Version 1.0; User's Guide

Published

Author(s)

Piotr A. Domanski, J S. Brown, Riccardo Brignoli

Abstract

The CYCLE_D-HX package simulates the performance of single-component refrigerants and refrigerant blends in subcritical vapor-compression refrigeration cycles. The basic system simulated by CYCLE_D-HX consists of a compressor, discharge line, condenser, expansion device, evaporator, compressor suction line, and an optional liquid-line/suction-line heat exchanger. The advanced cycles may contain a second compressor, one or two economizers, or an intercooler. In contrast to simplified vapor compression cycle models - such as CYCLE_D (Brown et al., 2017), which require refrigerant saturation temperatures in the evaporator and condenser as input - CYCLE_D-HX establishes saturation temperatures in the heat exchangers using the temperatures profiles of heat source and heat sink and the mean effective temperature differences (ΔThx) in the evaporator and condenser, respectively, which are specified as input to the program. This representation of heat exchangers facilitates the inclusion of both thermodynamic and transport properties in cycle simulations and makes CYCLE_D-HX suitable for comparative evaluations of different refrigerants, particularly those working in systems relying on refrigerant forced-convection heat transfer in the heat exchangers.
Citation
Technical Note (NIST TN) - 1974
Report Number
1974
NIST Pub Series
Technical Note (NIST TN)
Pub Type
NIST Pubs

Download Paper

DOI Link

Keywords

Air conditioning, Refrigeration, Simulation, Vapor Compression
Heating, ventilation and air conditioning equipment

Citation

Domanski, P. , Brown, J. and Brignoli, R. (2018), CYCLE_D-HX: NIST Vapor Compression Cycle Model Accounting for Refrigerant Thermodynamic and Transport Properties, Version 1.0; User's Guide, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.TN.1974 (Accessed April 24, 2024)

Created January 16, 2018, Updated November 10, 2018