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Carbon Hub / Measures / Variable-speed drives and motors
Engineering assessment

Variable-speed drives and motors

Match pump or fan speed to the required flow or pressure where the system duty varies.

Start with site dataOpen the assessment tools
01

What the measure changes

Match pump or fan speed to the required flow or pressure where the system duty varies.

02

Evidence required

System curve, static head, flow and pressure profile, motor and drive data, control method, harmonics and operating hours.

Inzonex removable modular insulation on industrial equipment
Equipment heat loss

Measure exposed hot surfaces

Use measured surface area, temperature and operating hours to calculate heat loss from boilers, kilns, heat exchangers, valves and pipework. Inzonex supplies removable modular insulation for equipment that requires maintenance access.

  • Design target: surface temperature at or below 45 °C, subject to the application and design review
  • Claimed heat-loss reduction: up to 96%, subject to the measured boundary and insulation specification
  • Removable construction for inspection and maintenance access
  • Calculation record available for the selected equipment and operating conditions

Do not add a calculated reduction to an emissions report until the reporting boundary, factor, implementation date and verification method have been approved.

03

Constraints and risks

Savings cannot be inferred from motor size. Constant-torque duties and high static head require separate assessment.

04

Possible applications

Sector membership does not establish feasibility. Confirm the actual process duty.

Technical source

US Department of Energy variable-speed pumping guide

No standard saving, cost or payback is assigned. Calculate the result from the site baseline and retain the source data and review status.

Review: retain the site evidence, source date, calculation method and approval status. Published by Inzonex Research. Report an error.
Source: Inzonex Carbon Hub — inzonex.co.uk/carbon · prices dated as shown on each figure · schedule per Regulation (EU) 2023/956 · indicative analytics, not compliance advice.