η = 1 − exp(−wA/Q); design basis SCA 75.7 s/m
ESP sizing method
Resources · Open engineering
ESP engineering resources: the methods behind the specifications
Arrow Energy publishes its engineering openly: the Deutsch-Anderson and Matts-Öhnfeldt sizing methods behind every ESP proposal, the economizer arithmetic behind every retrofit claim, a 30-term glossary, and project references recorded in mg/Nm³ at stated O₂. A specification that survives scrutiny does not need to hide its method.
30 terms, defined with numbers
Glossary entries
9 fields, emissions in mg/Nm³ @ stated O₂
Reference record format
~20 °C stack reduction ≈ 1 pp
Economizer rule of thumb
01 — Why open
Specifications survive scrutiny; adjectives do not
The engineering behind every Arrow proposal is published here, worked examples included.
Most equipment suppliers publish brochures and keep the sizing method to themselves. Arrow Energy Co., Ltd. does the reverse. The Deutsch-Anderson relation that sizes every electrostatic precipitator, the Matts-Öhnfeldt correction used for real polydisperse dust, the economizer heat balance behind every boiler performance retrofit claim — all of it is on these pages with the worked design-basis numbers attached: SCA 75.7 s/m, 3,888 m² of collecting area, 24 mg/Nm³ at 6 % O₂ dry.
Why publish the calculation methods openly?
Because the methods are not the advantage — executing them is. Publishing η = 1 − exp(−wA/Q) with worked numbers lets a plant engineer check any supplier's ESP quotation, including Arrow's, in ten minutes. A quotation whose arithmetic cannot be reproduced from its own stated figures is the one to question. Specifications survive scrutiny; that is what they are for.
The same standard applies to evidence. Project outcomes are recorded in a fixed nine-field format with emissions in mg/Nm³ at stated O₂, and customers are named only with written permission — the policy is stated in full on the project references page.
02 — What lives where
Four resources, four jobs
Use the table to find the page that answers your question.
| Resource | Contains | Use it when |
|---|---|---|
| Engineering tools | Deutsch-Anderson / SCA efficiency, migration-velocity back-calculation, economizer savings, boiler indirect-method efficiency — formulas and worked examples | Sizing, sanity-checking a quotation, estimating retrofit payback |
| Glossary | 30 ESP, bag filter and boiler terms defined with numbers | Reading a specification or emission report precisely |
| References | 9-field project records, emissions @ stated O₂ | Verifying that the claimed physics has been built and measured |
| News | Project milestones, technical notes, exhibition presence | Tracking what Arrow is building and publishing |
03 — The resources
Open engineering, four sections
Everything below is reference material — no registration, no gated PDFs.
Calculators & methods
Engineering tools
The ESP efficiency and sizing formulas — η = 1 − exp(−wA/Q), SCA = A/Q, Matts-Öhnfeldt with k ≈ 0.5 — plus economizer savings and BS 845 indirect-method boiler efficiency, each with worked design-basis numbers.
ESP efficiency calculators and sizing methodsTerminology
Glossary
Thirty terms from back-corona to sneakage, each defined in one to three sentences with the governing numbers — resistivity limits in Ω·cm, SCA in s/m, emission bases in mg/Nm³.
ESP terminology glossaryEvidence
References
Project records in a fixed nine-field format — fuel, boiler capacity in t/h, gas flow in Nm³/h, inlet and outlet dust at stated O₂ — named only with written customer permission.
ESP project referencesUpdates
News
Project milestones, short technical notes and exhibition presence — written to the same no-adjectives standard as the rest of the site.
Arrow Energy newsFAQ
Engineering questions, answered
Why does Arrow Energy publish its calculation methods?
Because buyers should be able to check the arithmetic. The Deutsch-Anderson equation, the SCA figures and the economizer heat balance behind Arrow proposals are on the tools page with worked design-basis numbers — 75.7 s/m, 24 mg/Nm³ at 6 % O₂ dry. A supplier whose sizing cannot be reproduced is asking for trust it has not earned.
Can I use the published tools to check a competitor's ESP quotation?
Yes — that is an intended use. Back-calculate the effective migration velocity from the quoted collecting area, gas flow and promised outlet; if it needs more than the 4–15 cm/s range typical of biomass fly ash, the quote is optimistic. The method and the worked example are on the calculators page.
Are the reference figures on this site guaranteed performance?
No. Published figures are design-basis or measured values on a stated basis — mg/Nm³ at reference O₂, dry — and the basis is always given. Guaranteed figures are stated per project after the technical assessment. Reference records name customers only with written permission; otherwise they are anonymised by class and country.
Related engineering pages
Send us your plant data
Fuel, boiler capacity, gas flow, current emission and the limit you must meet. An Arrow engineer replies with a technical assessment basis — not a brochure.