Recent Blogs
Open-Top Electric Furnace: Ideal Aperture Radiation Calculator
Estimate ideal net radiation through an open furnace aperture from area, temperatures and effective emissivity. Compare this single term with entered bank power.
Oil-Burning Melting Furnace: Hiscox Item 701
Explore the casing, firebrick lining, oil burner and removable hopper in Hiscox item 701. Calculate clear section diameter from casing size and lining thickness.
Lantern Bellows Dry Gas Meter: Animation and Volume Calculator
See how paired bellows drive a dry gas meter’s valve and register spindle. Calculate volume flow from displacement per cycle and cycle rate.
Hot-water House Boiler: Heat-Rate Arithmetic and AFUE Limits | FIRGELLI
Compare heat-input and output scenarios with assumed constant efficiencies. Learn why AFUE is an annual measure and this calculator cannot determine boiler size or capacity.
Flame-Heated Incubator: Enclosure Heat-Loss Calculator | FIRGELLI
Explore a historical thermostat and damper arrangement and calculate enclosure heat transmission from area, resistance and temperature difference.
Gas Pressure Regulator: Droop Illustration | FIRGELLI
Explore a spring-loaded regulator and an assumed linear droop calculation. Compare gauge pressures while understanding the limits of the model.
Gas Furnace: Air Injector and Heat-Balance Calculator
See how an air jet draws fuel gas into a mixing tube and feeds a furnace. Compare useful heat, required fuel input and a heat-duty...
Gas Crucible Furnace: Heat-Input Calculator | FIRGELLI
Explore crucible-furnace heat flow and estimate average fuel input, propane use and charge throughput from stated thermal assumptions.
Garbage Furnace: Drying Hearth and Flow Calculator
Follow refuse over a curved drying hearth toward two grates. Compare nominal gas volume and the division of an entered undergrate air flow.
Fuel Gas Burner: Relative Orifice-flow Calculator | FIRGELLI
Compare gas-orifice diameter and pressure-drop ratios under equal gas conditions. Interpret relative firing rate, area and equivalent pressure without selecting burner settings.
Fire Extinguisher: Valve Animation and Charge-Mass Calculator
Explore the parts and valve action of a generic stored-pressure dry-chemical extinguisher. Calculate average mass rate and released or remaining mass from entered values.
Electric Thermostat: Bimetal Strip Animation and Deflection Calculator
Explore a bimetal thermostat contact and calculate free-strip deflection, end rotation and first-contact temperature rise from geometry and flexivity.
Electric Heater Mechanism Explained: Joule Heating, Parts, Uses, Formula and Worked Example
See a tubular immersion heater and estimate power for a fixed water batch from mass, temperature rise, heat-up time, delivery factor and average tank loss.
Electric Gas Lighter: Piezo Striker Animation and Pulse Calculator
Follow a push-button piezo lighter’s spring, latch and striker. Compare measured voltage, electrode gap and pulse energy without predicting ignition success.
Electric Furnace Mechanism Explained: How It Works, Parts, Diagram, and Power Sizing Calculator
Explore a resistance-heated crucible furnace and estimate pure-aluminum charge energy, melting heat and average power from mass, temperature rise, time and losses.
Dry Gas Meter Mechanism: How It Works, Diaphragm Parts, Tangent Linkage, and Uses Explained
See diaphragm chambers and changeover valves meter gas volume. Calculate raw volume, corrected reference volume and average flow from calibrated cycle counts.
Crude Petroleum Burners Mechanism: How Steam Atomizing Oil Burners Work, Parts and Uses
Explore a conceptual external-mix oil atomizer. Compare entered oil and steam speeds, their ratio and difference, and constant-speed travel over 10 ms.
Cowles Electric Furnace Mechanism Explained: Diagram, Parts, Operation and Carbothermic Smelting Uses
Explore the Cowles resistance furnace and calculate electrical power, equivalent bed resistance and average current density from voltage, current and round shank diameter.
Centre Valve for a Gas House: Mechanism, Diagram, Parts, Formula and Uses Explained
Follow a gas-house centre valve routing flow through three purifier vessels while isolating a fourth. Calculate connection-pipe velocity and convert pressure units.
Centre Guide Gas Holder Mechanism Explained: How It Works, Parts, Diagram and Uses
Explore a water-sealed bell sliding on a fixed central guide. Calculate ideal gauge pressure, travel for a volume change and equivalent water head under stated...
Automatic Gasoline and Mantle Lamp Mechanism: How It Works, Parts, Diagram and Uses Explained
Explore the fuel, vapor and air paths of a pressure mantle lamp. The interactive curves are illustrative and do not provide operating settings or product...
Acetylene Generator and Gas Holder: How It Works, Diagram, Parts, and Industrial Uses Explained
Explore how a water-sealed gas-holder bell responds to production and demand. Calculate net flow and ideal buffer time with consistent gas-volume assumptions.
Acetylene Gas Generator Mechanism: How It Works, Parts, Diagram, and Calcium Carbide Reaction Explained
Explore a carbide-to-water generator schematic and calculate charge-based acetylene yield and equivalent consumption time from purity and conversion assumptions.
Acetylene Burner Mechanism: How It Works, Parts, Flame Diagram, and Heat Output Explained
Explore an oxy-acetylene torch illustration and calculate chemical heat input from compatible fuel-flow and heating-value data, with clear limits on oxygen and thickness comparisons.
Yoke-bar Reciprocator From Disk Crank: How It Works, Diagram, Formula and Uses Explained
Watch a disk crank drive a guided yoke. Compare ideal position, stroke, velocity and acceleration from crank radius, angle and rotational speed.