Visual flowsheets
Arrange streams, equipment, and unit operations directly on an Excel worksheet.
Process Simulation & Mass–Energy Balance Software
iBalance
Model steady-state processes for pulp and paper, power, water treatment, mining, biofuels, food and beverage, chemical processing, and HVAC in the familiar Microsoft Excel environment—enhanced by Copilot and ChatGPT integration.
Explore iBalance ↓Designed for practicing engineers
Process simulation,
without leaving Excel.
iBalance is Excel-based process simulation software for developing, solving, validating, and documenting steady-state mass and energy balances.
Engineers arrange connected streams and unit operations on a worksheet, enter operating data in familiar engineering units, and review calculated results and diagnostics in the same shareable workbook.
Engineering calculations
Solve steady-state material and energy balances using familiar engineering units and plant data.
Clear reporting
Review stream data, unit-operation results, constraints, and diagnostics inside the workbook.
Industry applications
Built for process-intensive plants
Explore the industries supported by the current unit-operation library. Connect industry-specific equipment with shared tanks, pumps, heat exchangers, and utilities to develop steady-state material and energy balances. Performance inputs such as conversion, recovery, and thermal duty depend on the selected model.
Pulp & paper
Pulp and paper process simulation
Develop balances for paper-machine stock and water systems, tanks, pumps, screens, filters, process heating, and mill utilities. Use a single flowsheet to trace how changes in flow, consistency, temperature, or equipment conditions affect connected operations.
- Paper-machine approach systems and silo loops
- Stock, water, and fiber mass balances
- Steam, condensate, and process-heat studies
Steam & power
Power plant and utility modeling
Build steady-state steam and power balances with boilers, heat exchangers, turbines, generators, process loads, and connecting streams. Review energy distribution and equipment results together in one auditable Excel model.
- Boiler and heat-exchanger energy balances
- Steam-turbine and generator calculations
- Plant utility and cogeneration studies
Water & wastewater
Industrial water treatment
Track treated water, reject streams, and sludge using specified recoveries, solids capture, and solute rejection.
- Clarifiers and dissolved-air flotation (DAF)
- Media filtration, ultrafiltration, reverse osmosis, and nanofiltration
- Sludge dewatering and process-water reuse balances
Minerals & mining
Mineral processing and recovery
Develop balances for wet classification, mineral concentration, and product or tailings dewatering using specified component recoveries.
- Hydrocyclones and mineral flotation
- Magnetic and gravity separators
- Mineral thickeners and filter presses
Biofuels & biogas
Renewable fuel process balances
Connect conversion, separation, gas cleanup, and residue handling with specified conversions and recoveries to track products, byproducts, and energy duties.
- Biomass hydrolysis, bioethanol fermentation, and biodiesel reactors
- Anaerobic digestion and biogas upgrading
- Biogas liquid knockout and digestate dewatering
Dairy
Milk and whey processing
Build component and energy balances around dairy separation and concentration, with connected tanks, pumps, and heat exchangers.
- Cream separation into cream and skim milk
- Milk and whey membrane concentration
- Fat, protein, water, and solute recovery balances
Sugar
Sugar extraction and recovery
Follow sugar, water, and fiber through extraction and product recovery using specified extraction performance, crystal yield, and component splits.
- Cane or beet juice extraction
- Sugar crystallization and mother-liquor separation
- Sugar centrifuges and wet-crystal recovery
Brewing
Brewhouse to packaged beer
Connect brewing operations to account for ingredients, fermentation products, process heat, and product losses.
- Mash and lauter, wort kettle, and whirlpool
- Fermentation, conditioning, and beer filtration
- Carbonation, pasteurization, and packaging yields
Chemical processing
Reaction and separation balances
Combine reactors, tanks, heat exchangers, and separation blocks for process-wide material and energy studies. Column blocks use specified component recoveries and heat duties.
- Reactors and continuous stirred tanks with heating coils
- Distillation, stripping, and absorption balances
- Filter presses and component separation
HVAC & building services
Air and hydronic energy balances
Represent connected air and water systems using specified thermal loads and pressure losses to account for heating, cooling, and distribution duties.
- Heating and cooling coils, air handling units, and VAV zones
- Chiller and heat-pump water-side duties
- Energy-recovery ventilation, duct segments, and hydronic distribution
How iBalance works
From flowsheet to engineering answer
- 1
Draw the process
Place unit operations on the Excel flowsheet and connect them with material or energy streams.
- 2
Enter known conditions
Add available flow, composition, consistency, pressure, temperature, duty, or equipment data.
- 3
Solve and review
Run the model, inspect calculated stream and equipment results, and use diagnostics to refine the balance.
- 4
Share the workbook
Keep the model, assumptions, results, and reporting together in the familiar Excel file.
Product tour
See iBalance in action
Frequently asked questions
About iBalance
What is iBalance?
iBalance is steady-state process simulation software for building, solving, validating, and documenting mass and energy balances in Microsoft Excel.
Which industries does iBalance support?
The unit-operation library covers pulp and paper, steam and power, industrial water and wastewater, minerals and mining, biofuels and biogas, dairy, sugar, brewing, chemical processing, and HVAC. Models support steady-state mass and energy studies; available performance calculations depend on the selected unit operation.
How is iBalance offered?
iBalance is offered as a freemium model, with a free version and a Professional version available by subscription or one-time purchase.
Does iBalance run inside Microsoft Excel?
Yes. The flowsheet, engineering data, results, and reports remain in an Excel workbook while the iBalance Excel add-in provides the calculation engine and process-modeling tools.