Cross-brand compressor benchmark in one click — Bitzer vs Frascold vs Copeland on the same chart
By DigiEntropy Engineering · 2026-01-01 · 6 min read
Picking between a Bitzer 4PCS-10.2 and a Frascold S30-153Y used to mean two PDF datasheets, a calculator, and an hour. With the DigiEntropy Benchmark tool it's two clicks. Here's how it works and why cross-brand benchmarking finally got easy.
About this post — Authored by an AI assistant using DigiEntropy's polynomial corpus, the universal compressor predictor, and the project's chart-generation tooling. Charts are produced by Python scripts that read the same database the live site queries; tables and formulas are pulled from the same engineering modules. Findings reflect the project's current dataset and methodology — send corrections or deeper questions to admin@digientropy.com.
Picking between a Bitzer 4PCS-10.2 and a Frascold S30-153Y at -10/40°C on R448A used to mean opening two PDF datasheets, scrolling to the right polynomial table, converting units, and squinting at the numbers. With the DigiEntropy Benchmark tool it's two clicks: pick the models, set the operating point, read the chart.
30-60 min - the old PDF workflow - repeated for every project
So the actual "compare Bitzer vs Frascold" workflow involves: download two PDFs, find the right polynomial table in each, normalize units, normalize standards, re-evaluate at a common operating point. That's a 30-60 minute job, repeated for every project.
30 s - with Benchmark - for a 4-compressor comparison
Total elapsed time: 30 seconds for a 4-compressor comparison.
13 - brands in the Models picker - it autocompletes across all of them
Type the first model in the Models picker — it autocompletes across all 13 brands.
3% - capacity gap, Bitzer vs Frascold - 1% on COP, -10/40°C on R448A
So they're within 3% on capacity and 1% on COP. The decision then comes down to price, lead time, regional support, and operating-envelope headroom — not the polynomial numbers themselves.
12,000+ - models in the Compressor Galaxy - on one capacity-vs-refrigerant scatter
The Compressor Galaxy visualises all 12,000+ models on one capacity-vs-refrigerant scatter; great for discovering candidates you didn't know existed.
Why cross-brand benchmarking has been so hard
Every compressor manufacturer publishes performance data slightly differently, one card per difference:
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Polynomial standard
Bitzer and Frascold use EN 12900 (10-coefficient bivariate in SST/SDT, °C, Watts). Copeland publishes AHRI 540 (10-coefficient in °F, BTU/h). Hanbell uses a 15-coefficient 4th-order variant. Danfoss uses EN 12900 with a fixed RGT = 20°C baseline.
Units
kW, BTU/h, hp, RT — every brand picks one.
Conditions
Some publish at 0/40, some at -10/40, some at custom SST/SDT pairs that don't line up across manufacturers.
Capacity control
Full-load, part-load, VFD, IGV — different brands expose different fractions, often as multipliers rather than independent polynomials.
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