NIST Vapor Compression Cycle Design Program : CYCLE_D - SRD 49

Published by National Institute of Standards and Technology | National Institute of Standards and Technology | Metadata Last Checked: June 27, 2025 | Last Modified: 2018-09-01 00:00:00

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 exchanger. In addition, the model can simulate a subcritical two-stage economizer cycle, a subcritical three-stage economizer cycle, and a subcritical two-stage compression cycle with intercooling. CYCLE_D includes 75 single-compound refrigerants and 113 predefined blends. Single-compound fluids can be combined to form blends of up to ten components. Computationally, the program is fully compatible with the NIST Reference Fluid Thermodynamic and Transport Properties - REFPROP, Version 10.0.

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Complete Metadata

bureauCode	[ "006:55" ]
identifier	ECBCC1C130292ED9E04306570681B10747
issued	2019-08-12
landingPage	https://www.nist.gov/srd/nist-standard-reference-database-49
language	[ "en" ]
programCode	[ "006:052" ]
references	[ "https://www.nist.gov/srd/nist-standard-reference-database-49" ]
theme	[ "Buildings and Construction:Air conditioning and heating equipment", "Standards:Reference materials" ]