ccp

name	ccp
description	Centrifugal compressor performance analysis with ccp (the ccp-performance Python package). Use when computing thermodynamic states with REFPROP or CoolProp (gas mixtures, equations of state), defining compressor operating points (suction/discharge, polytropic head and efficiency, Schultz, Huntington, Mallen-Saville, Sandberg-Colby methods), building impellers and performance maps (head/efficiency/power curves, Engauge digitized curves), converting curves to new suction conditions by similitude, checking ASME PTC 10 similarity limits (Mach, Reynolds, volume ratio), measuring flow with orifice plates (ISO 5167), or evaluating operational data against expected performance.
license	Apache-2.0

ccp Cookbook

Concise recipes for centrifugal compressor performance analysis with ccp. Each file is self-contained — read only the recipe you need.

Skill version: development (repo checkout)

Recipe	File	Key Methods
Thermodynamic states and fluids	states_and_fluids.md	State, fluid_list, plot_envelope
Performance points	points.md	Point, ccp.config.POLYTROPIC_METHOD
Impellers and performance maps	impellers.md	Impeller, point, curve, head_plot, save/load
Importing curves from charts (Engauge)	engauge_import.md	Impeller.load_from_engauge_csv
Converting to new suction conditions	conversion.md	Impeller.convert_from, Point.convert_from
Similarity and ASME PTC 10 limits	similarity.md	check_similarity, similarity_table, plot_similarity
Flow orifice metering	flow_orifice.md	FlowOrifice
Evaluating operational data	evaluation.md	Evaluation
Common gotchas	gotchas.md	—

All values are SI internally: pressure in Pa, temperature in K, head in J/kg, power in W, volumetric flow in m³/s, mass flow in kg/s, speed in rad/s. Convert with ccp.Q_(value, "unit"), e.g. ccp.Q_(7941, "RPM").to("rad/s").m.

If the recipes disagree with the installed ccp (missing methods, changed signatures), the skill may be stale — compare the version above with python -c "import ccp; print(ccp.__version__)" and re-run ccp-install-skill after upgrading.