Separate power from energy
Record whether the source field is kW, an accumulated kWh value or a normalized energy such as kWh/kg or kWh/t. Never copy a power reading into an energy comparison without the measured time history and calculation record.
Bead-mill trial reports / Energy audit
Bead-mill specific energy is comparable only when power, time, material basis and endpoint match.
A kW reading is power at a stated moment or interval; kWh records energy accumulated over time; kWh/kg or kWh/t adds a material denominator. Before comparing two reports, identify where power was measured, what no-load value was removed, which time window was integrated, what material quantity was used and which product endpoint the record reached.
01 / QuantityPower, accumulated energy or specific energy
02 / BoundaryMeasurement point, no-load definition and time window
03 / ReleaseDeclared denominator and matched product endpoint
Prevent a false energy comparison
The unit alone does not reveal the test boundary.
This page owns the reporting basis for an energy figure. It does not select a grinding system, perform scale-up, define residence time, size cooling or promise that two configurations will reach the same result at the same reported specific energy.
Expose gross, no-load and net fields
Name the actual measurement point and the equipment included. Preserve the gross record, document the no-load condition and method, and show any subtraction used to create a net value instead of labeling every power number as net grinding power.
Attach the denominator and endpoint
State whether the divisor is total slurry mass, dry-solids mass, another declared mass basis or product volume. Compare figures only beside the same product identity, feed state, route, sample method and accepted endpoint—or disclose every difference.
Report-to-report audit
Put both energy records into one traceable comparison.
These rows organize the evidence needed to interpret reported kW, kWh/kg or kWh/t. They are not a calculator, efficiency rating or scale-up rule.
Swipe or scroll horizontally to review every evidence column.
| Audit row | Report A | Report B | Comparison record |
|---|---|---|---|
| Reported quantity and unit | Copy the original field, value, unit and instrument or control-system label without conversion. | Copy the second report on the same basis; keep kW, kWh, kWh/kg, kWh/t or a volume-normalized result distinct. | Classify each number as power, accumulated energy or normalized energy and retain the original source record. |
| Power measurement boundary | Identify whether the record comes from a nameplate, incoming electrical meter, drive or controller field, shaft or another stated location, plus included auxiliaries. | Identify the corresponding location and included equipment; do not assume an identically named field measures the same boundary. | Measurement point, sensor or calculation source, sampling rate, included equipment, calibration or verification status and unresolved differences. |
| No-load and net-power basis | State the exact empty or no-load condition, speed, temperature, mechanical state, time and value, then preserve the subtraction method. | Document the second no-load test independently; do not import a loss value from another mill, speed, seal state or configuration. | Gross-power trace, no-load trace, stated subtraction, resulting net-power trace and reviewer disposition of any mismatch. |
| Integration interval | Record start and stop rules, time stamps, transients, pauses, pass or recirculation history and the interval used to accumulate energy. | Use the same inclusion rules or show how its interval differs, including start-up, hold, sampling and shutdown periods. | Time-series record or controlled calculation showing how the stated power history became accumulated net energy. |
| Material denominator | State the measured amount and basis: total slurry mass, dry-solids mass, another declared mass basis or product volume, including sampling or recovery exclusions. | Declare the same fields for the second report; do not compare unlike kg, t or volume bases behind a shared specific-energy label. | Product identity, lot, composition or solids basis, measured quantity, unit conversion, included material path and denominator calculation. |
| Configuration and endpoint | Attach feed state, mill and grinding-system identity, media, separator, mode, flow or pass history, temperature record, sample identity and endpoint method. | Attach the same fields for the second report and disclose any geometry, media, route, thermal or analytical difference. | Matched endpoint and method, complete test configuration, deviations, candidate-supplier review and representative confirmation plan. |
Audit route
Move from one headline number to a reviewable energy record.
Preserve the original measurements first. Normalization comes only after the team can identify the physical boundary, time history, material denominator and product result behind each number.
01→
Freeze the original reports
Keep the unedited values, units, time stamps, instrument or controller labels, plots, batch record, calculation version and sample identities.
02→
Map the power boundary
Identify every included drive or auxiliary, the measurement location, no-load condition, gross and net fields and any conversion or subtraction.
03→
Rebuild time and quantity bases
Trace the integration start and stop rules and declare the exact mass or volume denominator, material state and included product path.
04
Compare beside the endpoint
Place the normalized record beside the same feed, configuration, operating history, sampling method and product result, then assign differences for supplier and technical review.
Specific-energy RFQ checklist
Make every kW and kWh-per-quantity field traceable.
This checklist does not recommend a target, efficiency, mill size or scale-up factor. Unknown fields remain open until the data owner and candidate supplier confirm them.
Open the process brief- 01Original energy record
Report file and revision, original values and units, plots or time series, data source, sampling rate, controller or instrument labels, test date and responsible data owner.
- 02Measurement boundary
Nameplate, incoming electrical, drive/controller, shaft or other stated point; included motor, pump, cooling or auxiliary loads; sensor, calculation and calibration or verification status.
- 03No-load subtraction
Exact empty or no-load condition, mill and grinding-system state, media or product state, shaft speed, temperature, seals, time, gross value, no-load value and subtraction method.
- 04Integration history
Start and stop rules, complete power-versus-time record, transient and pause treatment, passes or loop history, sampling points and calculation version.
- 05Material denominator
Product and lot, composition or solids basis, total slurry, dry-solids, other declared mass or volume basis, measured amount, included hold-up or recovery and unit conversions.
- 06Test configuration
Feed state, chamber and grinding-system identity, media and separator, operating mode, flow or pass history, temperature record, cooling boundary, samples and deviations.
- 07Endpoint and review
Target result, sample location and time, preparation, test method, instrument and analysis settings, acceptance decision, candidate-supplier review, exclusions and change triggers.
Draft source record / Pending technical review
Three first-party sources define energy-report questions—not JINPIONEER performance.
The current manufacturer materials were reviewed on 31 July 2026. NETZSCH supplies a directly accessible white-paper definition and no-load example, VMA-GETZMANN discusses mechanical-power-based comparison at a matched result, and Bühler keeps power density and required specific energy as separate terms. Their models, values, transfer methods and results are excluded.
Buyer decision FAQ
Audit the basis before using specific energy as a comparison field.
Is kW the same as kWh/kg or kWh/t?
No. kW is a power quantity. kWh is energy accumulated over a stated time interval, and kWh/kg or kWh/t divides that energy by a declared material quantity. The time history and denominator must be visible before the fields can be interpreted.
Can motor nameplate power be used as net grinding power?
Not without evidence that defines the measurement and calculation boundary. Keep nameplate rating, incoming electrical demand, controller or drive fields, shaft or mechanical power and net grinding-chamber power as separate labels, then document any no-load subtraction and conversion.
What should be subtracted as bead-mill no-load power?
Do not import a universal loss value. The NETZSCH white paper describes a completely empty grinding chamber and says the no-load curve depends on speed, machine and condition, but the responsible supplier and data reviewer must define and record the exact state, time and measurement point for the test being reviewed.
Should specific energy use total slurry mass or dry-solids mass?
The denominator must be declared rather than guessed. The NETZSCH white paper describes a mass-or-volume basis and its displayed equation uses product solid mass; a report should identify whether its own basis is total slurry, dry solids, another defined mass or volume, with composition and conversions attached.
Does the same kWh/kg prove that two bead mills are equivalent?
No. Mill and grinding-system geometry, media, separation, flow or pass history, residence-time distribution, thermal path, stress conditions, sampling and analytical method can differ. Compare the complete configuration and matched endpoint, then confirm the candidate route in a representative trial.
What belongs in a specific-energy comparison request?
Include the original data and units, measurement point and included equipment, no-load test and subtraction, full power-versus-time interval, material denominator, feed and configuration, temperature and operating history, sample identity, endpoint method, candidate-supplier review, exclusions and change triggers.