Thermal oil heater sizing calculator
Convert useful process duty, apply design margin and efficiency, and estimate preliminary gas or diesel input without pretending that capacity alone completes the selection.
Calculate preliminary heater dutySpecification before quotation
Industrial Boiler Engineering Tools for Process Plants
Calculators, comparison logic and project-input checklists
This is JIELI’s engineering decision center: convert duty, estimate preliminary heater size, compare thermal oil with steam, and prepare the technical data needed for a credible quotation.
Heat-duty basiskcal/h · kW · MW
System inputsTemperature · flow · pressure
Commercial clarityFuel · efficiency · supply scope
Decision center
Use the tool that matches the question you need to answer
These pages are intentionally separate from the JIELI THERMAL product catalogue. They help owners, consultants and procurement teams define the engineering basis before comparing manufacturers.
Thermal oil heater vs steam boiler
Compare phase change, system pressure, temperature range, water treatment, condensate, control response and typical process fit.
Choose the heating mediumThermal oil system selection inputs
Review heat duty, outlet and return temperature, process flow, thermal-fluid limits, fuel, emissions, controls and supply boundary.
Open the eight-input checklistSteam condensate loss analysis
See the sensible-heat value of unrecovered saturated condensate from 2 to 12 kg pressure and change fuel-price assumptions in US dollars.
Open condensate analysisHow to use the results
Turn a quick calculation into a defensible RFQ
A useful preliminary result should become a written selection basis, not an isolated headline capacity. Record the assumptions so every bidder prices the same operating duty and supply boundary.
- Define the process load.Normal, minimum, peak and startup duty.
- Define the operating medium.Thermal fluid supply/return temperatures or steam pressure and condition.
- Define site constraints.Fuel quality, emissions, water, layout and delivery limits.
- Define the package boundary.Combustion, pumps, tanks, water treatment, controls and heat recovery.
Engineering review
Send the calculation basis, not only the requested boiler name.
Share duty, temperature or pressure, fuel, process, operating hours, emissions requirements and project country.