CENTRIFUGAL COMPRESSOR DESIGN EXCEL SHEET

Centrifugal compressor sizing normally means pulling together thermodynamic relations, aerodynamic sizing rules, and mechanical checks from several references before you get a usable result. The Centrifugal Compressor Design Excel Sheet from GrowMechanical puts that entire workflow into one spreadsheet: enter your inlet conditions and required discharge pressure, and it returns compression ratio, power consumption, impeller sizing, and mechanical design checks in one pass.

It is built for rotating equipment, process, and mechanical engineers working on compressor selection, proposal engineering, or design verification in oil & gas, power generation, petrochemical, and refrigeration applications.

What This Compressor Calculation Sheet Covers

Basic Operating Parameters

• Inlet conditions: pressure, temperature, and gas composition
• Required discharge pressure and flow rate
• Rotational speed (RPM)

Thermodynamic Calculations

• Polytropic and isentropic efficiency
• Compression ratio
• Polytropic head (work input)
• Power consumption in kW and HP

Aerodynamic Design

• Impeller diameter and blade angle
• Diffuser and volute sizing
• Mach number and flow coefficient

Mechanical Design Checks

• Shaft strength and critical speed analysis
• Bearing selection (radial and thrust)
• Vibration and stress screening

Why Use This Spreadsheet Instead of Manual Calculations

Centrifugal compressor design touches thermodynamics, fluid dynamics, and mechanical engineering at the same time, which makes manual calculation slow and error-prone. This spreadsheet consolidates the full calculation chain — from inlet gas properties through to shaft and bearing checks — into pre-built, cross-checked formulas, cutting typical sizing time from hours to minutes while keeping every intermediate value visible and auditable.

Key Features

• Fully editable Excel workbook with visible, auditable formulas
• Automatic polytropic and isentropic efficiency calculation
• Impeller, diffuser, and volute sizing outputs
• Shaft critical speed and bearing selection checks
• Performance curve data: pressure ratio vs. flow, efficiency map, surge and choke limits
• Editable output summary for proposals and design reports

Calculation Basis & Reference Standards

Typical Applications

• Oil & gas process and gas-lift compression
• Power plant compressed air and process gas systems
• Petrochemical and refinery compression trains
• Industrial refrigeration and HVAC compressor selection
• Vendor proposal review and third-party design verification

Who Should Use This Calculator

Rotating equipment engineers, process engineers, mechanical design engineers, EPC proposal teams, and consultants who need to size, check, or review centrifugal compressor performance without running a full CFD simulation for every case.

What You’ll Receive

• One fully editable Excel workbook covering thermodynamic, aerodynamic, and mechanical calculations
• Instant digital download after purchase
• Lifetime access to your downloaded file
• Free updates if the calculation sheet is revised

Compatibility

Compatible with Microsoft Excel 2010 and later, and Excel for Microsoft 365, on Windows and Mac.

How to Use This Compressor Design Sheet

1. Enter inlet gas conditions, composition, and required discharge pressure
2. Input flow rate and target rotational speed
3. Review calculated compression ratio, polytropic head, and power consumption
4. Check impeller, diffuser, and shaft sizing outputs
5. Export the summary sheet for your design report or vendor comparison

For upstream and downstream equipment on the same compression train, see our compressor design Excel sheet for reciprocating and general compressor sizing, our heat exchanger design Excel sheet for interstage cooling duty, and our centrifugal pump design and selection tool for associated liquid handling systems. Structural checks for adjacent vessels are covered in our vessel weight check calculator. For a complete process package, the Engineering Design & Calculation Master Excel Bundle includes compressor, pump, and heat exchanger sizing together, and you can browse our full library of process engineering Excel calculators for more tools.

Frequently Asked Questions

Does this spreadsheet follow API 617?

The calculation logic is structured around API 617 practice for centrifugal compressors, covering thermodynamic performance, aerodynamic sizing, and mechanical checks such as shaft critical speed and bearing selection.

Can I use this for both process gas and air compressors?

Yes. Enter your specific gas composition and inlet conditions, and the thermodynamic calculations adjust accordingly for process gas, natural gas, or air compression duty.

Do I need simulation software like Aspen HYSYS or ANSYS CFX to use this?

No. This spreadsheet is built for manual, auditable calculation and validation. Many engineers use it alongside simulation software to cross-check results, but no external software is required to use it.

What outputs does the spreadsheet provide?

You get compression ratio, polytropic and isentropic efficiency, power consumption, impeller and diffuser sizing, shaft critical speed, bearing selection guidance, and performance curve data including surge and choke limits.

How is the file delivered?

As an instant digital download immediately after purchase, so you can start your compressor sizing calculation the same day.

Get Your Centrifugal Compressor Design Sheet Today

Replace scattered thermodynamic and mechanical reference calculations with one auditable spreadsheet. Download the Centrifugal Compressor Design Excel Sheet and get compression, power, and mechanical sizing results in minutes.