Understanding Real Steam Demand Before Making Capital Decisions

Many facilities operate boilers without knowing their true steam demand. Load Studies and In-Service Efficiency (ISE) Studies help replace assumptions with measured operating data, allowing customers to make more informed equipment decisions.

Understanding the Difference

A Load Study focuses on understanding actual steam demand and determining whether existing boiler capacity is properly sized. It is not an efficiency study.

• Boiler may be over or undersized
• Load fluctuation concerns need investigation
• Evalute the need for an accumulator

An ISE Study builds upon the same data collection effort but adds detailed efficiency, fuel savings, emissions reductions, and ROI projections.

When Should They Be Used?

These studies are particularly valuable when:

• The customer suspects boilers are oversized or undersized.
• Steam demand varies significantly throughout the day.
• Accumulator sizing or justification is needed.
• A customer requests detailed savings projections.
• A replacement project requires defensible sizing recommendations.

Required Information

1. The process begins with completion of a Load Study Qualification Form containing:

• Facility information
• Operating schedules
• Boiler details
• Steam pressure information
• Process descriptions and operating conditions
  • Identify low load, high load, and standby conditions; these define the operating envelope used for boiler sizing.
  • Note whether an accumulator or similar equipment is in use or being considered; this directly affects the sizing recommendation.

2. Data is then collected using one or more methods:

• Meter studies — Flow meters on water, gas, and steam lines; direct measurement of inputs and outputs.
• Sensor studies — Temperature and pressure sensors + data logging; captures system behavior over time. Flow can be interpreted.
• Miura ZX11 data collection (for Miura boilers only)
• MOM/Miura Connect/BAS monitoring data where available

3. Consult Applications Engineering before the site visit. Confirm the correct study method and equipment before arriving on site.

Outputs

Load Study outputs include:

• Actual steam demand profile
• Peak, average, and minimum operating conditions
• Recommended boiler sizing
• Recommended boiler quantity
• Load fluctuation analysis

ISE Studies include everything above plus:

• In-service efficiency analysis
• Projected fuel savings
• Emissions reduction estimates
• ROI-supporting operating cost comparisons

Key Assumptions

• Measurement Window — Assumed steady-state operation during the measurement window — short or atypical measurement periods may not capture seasonal or process variation.
• Operating Conditions — Steam load data is collected from current equipment at current conditions — any planned process changes should be disclosed before the study begins.
• Instrument Accuracy — Meter or sensor accuracy directly affects output reliability — equipment calibration and placement are Engineering's responsibility.
• ISE Savings Basis — ISE savings projections assume Miura boilers replace existing equipment on a like-for-like basis in the same steam system configuration.
• Energy Rates — Fuel and utility rates used in savings calculations are provided by the customer or RSM — changes in energy costs will affect projected payback.

Always review the report with Applications Engineering before presenting to the customer; context around assumptions matters.

To request applications engineering assistance, reach out to us.applications@miuraz.com or submit a service request through our portal.