Thermal Engineering Simulators

2d Conduction Temperature Simulator

Heat Conduction

Explore a 2D steady conduction field, centerline temperature, and heat-flux direction from four boundary temperatures and conductivity.

Accelerated Life Arrhenius Model Simulator

Electronics Thermal Management

Convert Arrhenius accelerated-test life to use-condition life from stress temperature, use temperature, activation energy, and observed test life.

Ahu Heat Balance Simulator

HVAC & Psychrometrics

Estimate AHU outlet temperature and sensible load from airflow, inlet dry-bulb temperature, coil surface temperature, and bypass factor.

Atkinson Cycle Simulator

Thermodynamic Cycles

Atkinson Cycle Simulator: Visualise the ideal cycle of the over-expanded engine, where the expansion stroke is longer than the compression stroke. Change the…

Bell-Coleman Cycle Simulator

Thermodynamic Cycles

Bell-Coleman Cycle Simulator: Visualise the ideal "reverse Brayton" refrigeration cycle that uses air itself as the working fluid. Adjust the cold-space temp…

Biot Number Simulator — Lumped Capacitance Validity for Transient Heat

Heat Conduction

Biot number simulator: real-time Bi = hL/k, lumped capacitance regime, time constant tau and Fo from convection, conductivity, characteristic length and thermal diffusivity.

Black-Body Radiation Simulator

Thermal Radiation

Black-Body Radiation Simulator: visualize Planck's law. Adjust temperature to observe peak wavelength shift, Wien's displacement law, Stefan-Boltzmann law, and comparison with the classical ultraviolet catastrophe.

Blackbody Color Temperature Simulator

Thermal Radiation

Blackbody Color Temperature Simulator: Visualize spectrum shifts and radiated power changes across thermal wavelengths. Interactive tool for engineers studying thermal radiation and color temperature.

Boiling Correlations Detail Simulator

Convection & Boiling

Evaluate wall superheat, heat-transfer coefficient, and CHF margin from heat flux, pressure, diameter, and vapor quality.

Boiling Curve Simulator — Nukiyama Curve and Pool Boiling

Convection & Boiling

Simulate Nukiyama boiling curves and pool boiling heat flux vs superheat at 1 atm. Visualize CHF and burnout regimes for thermal engineering analysis.

Boiling Heat Transfer Calculator

Convection & Boiling

Plot boiling curves instantly. Identify convection, nucleate, transition, and film boiling regimes. Calculate critical heat flux and film boiling with key engineering correlations.

Brayton Cycle Simulator — Thermal Efficiency of a Gas Turbine

Thermodynamic Cycles

Brayton cycle simulator for gas turbines: analyze thermal efficiency with variable pressure ratio, temperature, and T-s diagrams. Interactive CAE tool.

Building Heat Loss Simulator

HVAC & Psychrometrics

Building Heat Loss Simulator compares how heat transfer, temperature difference, and cooling margin shifts as the main assumptions change.

Carnot Cycle Simulator — P-V & T-S Diagram, Thermal Efficiency

Thermodynamic Cycles

Carnot Cycle Simulator: Adjust hot and cold reservoir temperatures to calculate Carnot efficiency, and visualize P-V and T-S diagrams in real time. Understan…

Chilled Water Coil Performance Simulator

Heat Exchangers

Estimate chilled-water coil capacity, outlet air temperature, and approach from airflow, water flow, inlet air temperature, chilled-water temperature, and UA.

Newton's Law of Cooling — Coffee Simulator

Convection & Boiling

Vary initial temperature, room temperature, and cooling constant k to calculate how long until your coffee reaches drinking temperature.

Combined Cycle Power Plant Simulator

Thermodynamic Cycles

Combined Cycle Power Plant Simulator: Model a power plant that pairs a gas turbine (Brayton cycle) with a steam turbine (Rankine cycle). Adjust each turbine'…

Film Condensation on a Vertical Plate Simulator

Convection & Boiling

Film Condensation on a Vertical Plate Simulator: Solve "film condensation" — saturated vapour condensing on a cooler vertical wall, forming a thin liquid fil…

Forced Convection Heat Transfer Calculator — Nusselt Number & h

Convection & Boiling

Calculate forced convection heat transfer instantly. Enter fluid, velocity, and temperatures to get Re, Pr, Nu, and h. Compare fluids and use key equations.

Convective Drying Rate Calculator

Convection & Boiling

Calculate drying times for constant-rate and falling-rate periods. Visualize the drying curve and rate with this convective drying calculator.

Cooling Coil Load Simulator — Sensible, Latent & Total Heat

HVAC & Psychrometrics

Cooling Coil Load Simulator calculates sensible, latent, and total heat loads from air states. Instantly compute dehumidification rates and SHF for HVAC cooling coil design.

Cooling Tower Performance Simulator — Merkel / NTU Method

Heat Exchangers

Calculate performance of counter-flow and cross-flow cooling towers using the Merkel (NTU) method in real time.

Critical Radius of Insulation Simulator

Heat Conduction

Critical Radius of Insulation Simulator: Compute how heat loss changes when insulation is added to a pipe or wire. Around the critical radius r_cr = k/h, add…

Datacenter PUE Cooling Efficiency Simulator — hyperscale

HVAC & Psychrometrics

Datacenter PUE Cooling Efficiency Simulator — hyperscale: A tool that lets you pseudo-design hyperscale datacenters of the PUE 1.1 class achieved by Google a…

Dew Point and Relative Humidity Calculator — Magnus Approximation

HVAC & Psychrometrics

A Magnus-approximation calculator that computes dew point, wet-bulb temperature, vapor pressure and humidity ratio from dry-bulb temperature and relative humidity in real time.

Diesel Cycle Simulator

Thermodynamic Cycles

Diesel Cycle — Constant-Pressure Heat Addition & Cutoff Ratio: Visualise the ideal cycle of a Diesel engine — the air-standard Diesel cycle. Adjust the compr…

Disc Brake Thermal Simulator

Heat Conduction

A brake is a device that converts a vehicle's kinetic energy into frictional heat. Adjust the vehicle mass, the speed before braking, the number of discs and the materia…

Dual (Sabathé) Cycle Simulator

Thermodynamic Cycles

Visualise the dual (Sabathé) cycle, the ideal model of a modern diesel engine.

Outdoor & Return Air Enthalpy Mixing Simulator

HVAC & Psychrometrics

Online tool that mixes outdoor and return air by enthalpy conservation. Outdoor T, RH and OAF give mixed T, humidity ratio and enthalpy in real time on a psychrometric chart.

Ericsson Cycle Simulator

Thermodynamic Cycles

Ericsson Cycle Simulator: Visualize the ideal Ericsson cycle, built from two isothermal processes and two constant-pressure processes. Adjust the hot and col…

Free-Water-Surface Evaporation Rate — ASHRAE / Carrier

Heat Exchangers

Calculate free-water-surface evaporation rates for pools and cooling towers using temperature, humidity, wind speed. Real-time vapor pressure analysis.

Exergy Analysis Simulator

Thermodynamic Cycles

A tool that judges the quality of energy, not just its quantity.

Fin Array Simulator — Heat Sink Total Heat Transfer

Heat Exchangers

Simulate heat sink fin arrays to analyze total heat transfer and surface efficiency. Optimize fin geometry, conductivity, and convection for thermal design and CPU cooler engineering.

Fin Efficiency & Temperature Distribution Calculator

Heat Exchangers

Calculate fin efficiency, temperature distribution, and heat flux in real-time for rectangular, triangular, and parabolic fins with this engineering tool.

Fin Heat Transfer Simulator — Efficiency, Temperature Distribution & Optimal Design

Heat Exchangers

Master fin heat transfer: solve the governing equation, visualize temperature profiles, and calculate efficiency in real-time for CPU cooling design.

Finite Difference Heat Conduction Simulator — Explicit FDM & Stability

Heat Conduction

Simulate 1D heat conduction with explicit finite difference method. Learn the governing equation, stability criterion, and visualize temperature distribution.

Furnace / Boiler Efficiency Simulator

Thermodynamic Cycles

Furnace / Boiler Efficiency Simulator: Evaluate how effectively a boiler or industrial furnace turns fuel into useful heat, using the heat-loss method and th…

Real Gas Compressibility Factor Simulator

Gas & Thermodynamic Properties

Real Gas Compressibility Factor Simulator: The ideal-gas law PV = nRT is convenient, but real gases drift away from it at high pressure or low temperature. T…

Intercooled Gas Turbine Simulator

Thermodynamic Cycles

Intercooled Gas Turbine Simulator: Visualise an ideal Brayton cycle whose compression is split into two stages with an intercooler between them. Adjust the p…

Grashof Number Simulator — Natural Convection Characteristic Number

Convection & Boiling

Grashof number simulator: real-time Gr = gBdTL^3/nu^2 for natural convection. Rayleigh number, Churchill-Chu Nusselt, and laminar/turbulent regime for a vertical plate.

Agricultural Greenhouse Energy Balance Simulator

HVAC & Psychrometrics

A tool for assembling the heat balance of an agricultural greenhouse.

1D Transient Heat Conduction Simulator

Heat Conduction

Simulate 1D transient heat conduction with a finite difference model. Explore temperature profile evolution by changing initial and boundary conditions.

2D Heat Conduction FDM Simulator — Temperature Contour & Isotherms

Heat Conduction

Simulate 2D steady-state heat conduction with finite differences. Set boundaries, add a heat source, and visualize the temperature contour.

Transient Heat Conduction Heisler Chart Calculator — Plane Wall, Cylinder & Sphere

Heat Conduction

Analyze transient heat conduction in solids using Heisler chart methods. Real-time calculator for plane walls, cylinders, and spheres with 1-term approximation.

2D Transient Heat Conduction Simulator

Heat Conduction

Transient Heat Conduction Simulator (FDM): Solve ∂T/∂t = α∇²T using finite difference method in real time. Freely set boundary conditions, internal heat sour…

Heat Diffusion Equation Simulator

Heat Conduction

Experience real-time 2D heat diffusion. Click to place sources, adjust materials, boundaries, and speed to visualize the Fourier equation and temperature evolution.

2D Transient Heat Equation Simulator

Heat Conduction

Simulate 2D heat diffusion in real-time. Visualize with animation, add custom heat sources, and explore the finite difference method.

Heat Exchanger Design Calculator (NTU-ε & LMTD)

Heat Exchangers

Calculate heat exchanger outlet temperatures, effectiveness (ε), NTU, and LMTD instantly with this free online calculator. Input flow rates, specific heats, and temperatures.

Double-Pipe Heat Exchanger Design Calculator (LMTD & NTU Method) — Parallel/Counter Flow

Heat Exchangers

Calculate double-pipe heat exchanger parameters: outlet temps, heat duty, LMTD, effectiveness, and tube length for parallel and counter flow designs.

Heat Exchanger Design Calculator (NTU-Effectiveness / LMTD Method)

Heat Exchangers

Interactive ε-NTU heat exchanger simulator. Enter C_h, C_c, UA and inlet ΔT to get NTU and effectiveness ε for counter-flow, parallel-flow and unmixed cross-flow with ε-NTU curves.

Shell & Tube Heat Exchanger Designer

Heat Exchangers

Design shell-and-tube heat exchangers. Calculate Q, LMTD, F-factor, required area, NTU, and effectiveness with temperature profiles.

Building Heat Loss Simulator — U-Value, R-Value & Heating Load Calculator

HVAC & Psychrometrics

Simulate building heat loss in real time. Adjust insulation for walls, roof, windows, and doors to visualize U-values and calculate annual heating energy needs.

Heat Pipe Performance Calculator — Capillary Limit & Effective Conductance

Convection & Boiling

Calculate heat pipe performance: input fluid, wick type, temperature, and dimensions to get capillary limit, conductance, and max heat flux.

Heat Pump & Refrigeration COP Calculator — Carnot Cycle Efficiency

Thermodynamic Cycles

Calculate heat pump and refrigeration efficiency instantly. Adjust temperatures and Carnot factor to see COP, heat transfer, and annual energy costs.

Heat Pump Cycle Simulator

Thermodynamic Cycles

Simulate and plot a vapor-compression refrigeration cycle on a p-h diagram in real time. Compute COP for refrigerants like R134a, R410A, and R290.

Heat Pump & Refrigeration Cycle Calculator

Thermodynamic Cycles

Heat Pump & Refrigeration Cycle Calculator focuses on heat transfer, temperature difference, and cooling margin, giving a compact read on the current case and the trend …

Blackbody Radiation Simulator — Planck Distribution & Stefan-Boltzmann Law

Thermal Radiation

Adjust temperature and emissivity to visualize Planck's radiation spectrum in real time. Compare curves for the Sun, incandescent bulb, and human body.

Energy Recovery Ventilator (ERV) Simulator

HVAC & Psychrometrics

An energy recovery ventilator reuses the heat and moisture in the indoor air thrown away by ventilation, transferring it to the incoming outdoor air.

HRSG (Heat Recovery Steam Generator) Simulator

Thermodynamic Cycles

A gas turbine throws away exhaust at 600°C. A combined-cycle plant (CCGT) catches that heat in an HRSG, raises steam and spins a second turbine.

Heat Sink Design Calculator (Electronics Cooling / Junction Temperature)

Heat Exchangers

Calculate junction temperature with our free online heat sink calculator. Switch between natural/forced convection and visualize thermal resistance.

Finned Heat Sink Design Calculator

Electronics Thermal Management

Optimize fin geometry for natural or forced convection. Calculate fin efficiency, thermal resistance, and junction temperature rise with this CAE heat sink design tool.

Heat Sink Thermal Resistance Calculator

Electronics Thermal Management

Calculate heat sink thermal resistance, fin efficiency, and junction temperature instantly for forced or natural convection cooling systems.

Heat Transfer Fins Efficiency & Optimal Design Calculator

Heat Conduction

Optimize heat transfer fin design with real-time efficiency calculator. Adjust materials, dimensions, and visualize thermal performance instantly.

Thermal Radiation Heat Transfer Calculator — Stefan-Boltzmann Law

Thermal Radiation

Calculate thermal radiation heat transfer instantly. Use our calculator for real-time Q = εσA(T₁⁴−T₂⁴) results, heat flux visualization, and radiation analysis.

Heating Curve Simulator

Gas & Thermodynamic Properties

Visualize temperature changes in real time as a substance is heated. Compare latent heat plateaus for water, ethanol, iron, liquid nitrogen, aluminum, and copper.

Heisler Chart Simulator — Transient Conduction

Heat Conduction

Compute transient conduction in a body that is initially at a uniform temperature and is suddenly exposed to convection, using the one-term approximation behind the Heis…

HVAC Thermal Load Calculator

HVAC & Psychrometrics

Calculate real-time HVAC thermal loads: envelope, solar gain, occupancy & ventilation. Get SHR, latent load formulas, and annual energy estimates.

Ideal Gas Simulator (PVT Surface)

Gas & Thermodynamic Properties

Ideal gas simulator. Visualize PV=nRT with real-time molecular animation and a 3D PVT surface; vary T and moles to see pressure, density and energy respond.

Jet Engine Performance Calculator — Brayton Cycle T-s Diagram

Thermodynamic Cycles

Analyze turbojet & turbofan Brayton cycles. Set pressure ratio, TIT, bypass ratio & efficiencies to compute thermal efficiency, specific thrust & SFC.

Jet Impingement Cooling Simulator — Heat Transfer on the Plate

Convection & Boiling

Jet impingement cooling simulator for analyzing stagnation-point heat transfer and nozzle performance on flat plates. Explore jet velocity, diameter, standoff ratio effects.

Joule-Thomson Effect Simulator — Throttle Expansion and Temperature Change

Gas & Thermodynamic Properties

Joule-Thomson Effect Simulator: Calculate temperature changes during throttle expansion using van der Waals gas model, Joule-Thomson coefficient, and inversion temperature.

LED Design & Thermal Calculator

Electronics Thermal Management

Optimize LED performance with real-time thermal calculations for efficiency, junction temperature, luminous flux, and bin selection. Find the ideal operating point.

LED Junction Temperature & Thermal Design Simulator

Electronics Thermal Management

LED Junction Temperature & Thermal Design Simulator: Compute the junction temperature T_j of a high-power LED from its forward current, forward voltage and t…

LMTD Simulator — Log Mean Temperature Difference for Counter and Parallel Flow

Heat Exchangers

LMTD simulator: real-time log mean temperature difference for counter-flow and parallel-flow heat exchangers, with temperature profiles and a ΔT_2/ΔT_1 LMTD function curve.

Lumped Capacitance Method

Heat Conduction

Visualize transient heat conduction and verify Biot number validity in real time. Compare cooling/heating curves for steel, aluminum, and more materials.

Maxwell-Boltzmann Speed Distribution Simulator

Gas & Thermodynamic Properties

Maxwell-Boltzmann speed distribution simulator. Compute f(v) of an ideal gas from temperature and molar mass in real time, with most-probable, mean and RMS speeds.

Mean Free Path Simulator — Kinetic Theory of Gases

Gas & Thermodynamic Properties

Mean free path simulator: real-time hard-sphere lambda, mean speed, collision frequency and number density from temperature, pressure, molecular diameter and molar mass.

Multi-Layer Wall Thermal Resistance & U-Value Calculator

Heat Conduction

Calculate thermal resistance, U-value, and interface temperatures for multi-layer walls (up to 5 layers) with this real-time visualization tool.

Natural Convection Heat Transfer Coefficient Calculator

Convection & Boiling

Calculate natural convection heat transfer coefficients instantly with our free online tool. Accurate, easy-to-use, and no registration required.

Otto Cycle Simulator — Thermal Efficiency of a Spark-Ignition Engine

Thermodynamic Cycles

Compute Otto-cycle thermal efficiency and 4-state temperatures from compression ratio, specific heat ratio, intake temperature and heat input. Higher r raises efficiency.

Overall Heat Transfer Coefficient Simulator

Heat Exchangers

Overall Heat Transfer Coefficient Simulator: Compute the overall heat transfer coefficient U for a wall separating two fluids in a heat exchanger, pipe or bu…

Passive House Air Tightness n50 Blower Door Simulator

HVAC & Psychrometrics

Real-time Passivhaus design tool that converts the Blower Door Q50 (50 Pa leakage flow) into n50, equivalent leakage area (ELA), infiltration heat loss and annual heatin…

PCB Thermal Analysis · Junction Temperature Calculator

Electronics Thermal Management

Calculate PCB junction temperature with thermal resistance models. Supports BGA, QFP, TO-220, MOSFET packages. Includes heatsink and thermal via analysis.

Phase Change Material (PCM) Thermal Analysis Tool

Convection & Boiling

Simulate 1D melting of ice, paraffin, and molten salt using the enthalpy method. Visualize phase change behavior with this finite difference analysis tool.

Piston Engine Thermodynamics Simulator — Otto & Diesel Cycle P-V Diagram

Thermodynamic Cycles

Simulate Otto and Diesel engine cycles in real-time. Adjust parameters like compression ratio to analyze thermal efficiency and work output with interactive P-V and T-s diagrams.

Polytropic Process Simulator

Gas & Thermodynamic Properties

Visualise a polytropic process — a gas changing state along the law P·Vⁿ = constant.

Psychrometric Chart Calculator — Dry-Bulb, Humidity Ratio & Enthalpy

HVAC & Psychrometrics

Plot air properties on a live psychrometric chart. Adjust temperature and humidity to instantly calculate dew point, enthalpy, and humidity ratio.

Radial Conduction Through a Sphere Simulator

Heat Conduction

Radial Conduction Through a Sphere Simulator: Visualise steady-state heat conduction flowing radially through a spherical shell — for example the insulation …

Radiant Cooling Load Simulator

HVAC & Psychrometrics

Radiant Cooling Load Simulator: Design a radiant cooling system that puts cold panels on the ceiling (chilled-ceiling cooling). Adjust the room temperature, …

Radiation Network Simulator — Surface & Space Resistances

Thermal Radiation

Radiation Network Simulator for gray surface heat transfer analysis. Visualize radiative resistance networks and thermal behavior with adjustable emissivity and temperature parameters.

Radiation View Factor Calculator

Thermal Radiation

Calculate radiation view factor F₁₂ in real time for parallel rectangles, perpendicular plates, and coaxial disks. Verify the reciprocity relation and visualize parametric curves.

Rankine & Refrigeration Cycle Simulator

Thermodynamic Cycles

Visualize Rankine and refrigeration cycles on T-s and P-h diagrams. Calculate efficiency, COP, and more with this real-time cycle simulator.

Refrigerant Selection & Environmental Properties Comparison Tool

Thermodynamic Cycles

Compare 20 refrigerants by GWP, ODP, safety, and COP. Check F-Gas & SNAP compliance. Find replacements for R-22 and R-134a with efficiency analysis.

Vapor Compression Refrigeration Cycle Calculator — P-h Diagram & COP

Thermodynamic Cycles

Calculate refrigeration cycle performance instantly. Adjust temperatures, refrigerant, and compressor efficiency to visualize the P-h diagram and compute COP in real time.

Vapor Compression Refrigeration Cycle Designer — COP, Capacity & P-h Diagram

Thermodynamic Cycles

Design and analyze vapor compression cycles. Input temperatures, superheat, subcooling, and compressor efficiency to instantly compute COP, capacity, and compressor work.

Regenerator Effectiveness Simulator

Heat Exchangers

Evaluate a regenerator that recovers heat by passing the hot gas and the cold gas alternately through a thermal-storage matrix.

Sensible Heat Factor (SHF) Calculator — HVAC Load Balance

HVAC & Psychrometrics

Sensible Heat Factor calculator for HVAC load balance. Compute SHF ratio from sensible and latent loads, visualize on psychrometric chart for cooling coil design.

Window Solar Heat Gain (SHGC) Simulator

HVAC & Psychrometrics

Window Solar Heat Gain (SHGC) Simulator: A tool for calculating the heat that enters a room through a window. Change the glass type, window area, solar irrad…

Specific Heat & Calorimetry Simulator

Gas & Thermodynamic Properties

Specific Heat & Calorimetry Simulator: Calculate and graph Q = mcΔT in real time. Compare heat capacities between materials and visualize equilibrium tempera…

Stack Effect (Chimney Draft) Simulator

HVAC & Psychrometrics

Stack Effect (Chimney Draft) Simulator: Visualise the "stack effect" that arises because warm air is light and cold air is heavy. Adjust the chimney height, …

Steam Properties Calculator — Mollier Diagram & Steam Tables

Gas & Thermodynamic Properties

Calculate steam properties instantly with our tool. Input temperature and pressure to get thermodynamic data and visualize Mollier, P-v, and T-s diagrams.

Steam Rankine Cycle Calculator

Thermodynamic Cycles

Calculate thermal efficiency and T-s diagrams for Steam Rankine cycles in real time. Adjust pressure, efficiency, and toggle reheat.

Steam Tables Simulator — Water/Steam Thermodynamic Properties

Gas & Thermodynamic Properties

Specify temperature or pressure to calculate specific volume, enthalpy, and entropy for saturated water, saturated steam, and superheated steam in real time.

Stefan-Boltzmann Radiation Calculator

Thermal Radiation

Calculate radiative heat transfer instantly with our blackbody calculator. Visualize Planck spectrum, emissive power, and peak wavelength using key radiation laws.

Stirling Engine Cycle Simulator

Thermodynamic Cycles

Animate the Stirling cycle (isothermal expansion, isochoric cooling, isothermal compression, isochoric heating) on a P-V diagram. Compare thermal efficiency to Carnot.

Swimming Pool Heat Loss & Evaporation Simulator

Convection & Boiling

Swimming Pool Heat Loss & Evaporation Simulator: Real-time evaporative, convective and radiative heat loss for indoor and outdoor swimming pools using the AS…

Thermal Bridge 2D Heat Conduction Simulator

Heat Conduction

Simulate 2D steady-state heat conduction in walls. Visualize temperature contours and isotherms using the finite difference method.

Thermal Camera Simulator

Thermal Radiation

Simulate 2D heat flow in real-time. Paint heat sources, cold sinks, and insulators. The thermal camera solves physics with Jacobi iteration for realistic rendering.

Thermal Barrier Coating (TBC) Calculator — Multilayer Heat Resistance

Thermal Radiation

Visualize TBC insulation effects using a multi-layer thermal resistance model.

Thermal Comfort PMV/PPD Simulator (ISO 7730)

HVAC & Psychrometrics

A tool for Fanger's thermal-comfort model (ISO 7730), which turns "hot" and "cold" into numbers.

Thermal Contact Resistance Simulator

Heat Conduction

Thermal Contact Resistance Simulator: Evaluate the "thermal contact resistance" at a joint where two solids are pressed together. Adjust the contact pressure…

Thermal Expansion & Thermal Stress Calculator

Gas & Thermodynamic Properties

Calculate thermal expansion for any material. Input dimensions and temperature change to get linear, area, and volumetric results, plus stress and strain.

Thermocouple Transient Response Simulator — First-Order Lag

Electronics Thermal Management

Model thermocouple transient response with first-order lag simulation. Analyze sensor time constant, measurement lag, and temperature dynamics for thermal instrumentation.

Thermocouple Seebeck EMF Simulator

Electronics Thermal Management

Thermocouple Seebeck EMF Simulator: Calculate how much electromotive force a thermocouple of two dissimilar metal wires produces through the Seebeck effect. …

Thermodynamic Cycle Calculator (Carnot, Otto, Diesel, Brayton)

Thermodynamic Cycles

Visualize Carnot, Otto, Diesel, and Brayton cycles on P-V and T-s diagrams in real time. Instantly compute thermal efficiency, net work, and heat exchange quantities.

Thermosiphon Loop Simulator

Convection & Boiling

Design a thermosiphon — a loop in which fluid keeps circulating without a pump.

Transient Conduction in a Semi-Infinite Solid Simulator

Heat Conduction

Use this page to relate representative assumptions to heat transfer, temperature difference, and cooling margin before moving into the adjacent engineering checks.

Transient Semi-Infinite Solid Simulator

Heat Conduction

Calculate how the temperature of a "very thick body" soaks inward with time after its surface temperature is suddenly changed.

Vaccine Cold Chain Thermal Mass Holdover Simulator

HVAC & Psychrometrics

Vaccine Cold Chain Thermal Mass Holdover Simulator: Calculate how many hours a vaccine shipping cooler can stay cold from the insulation, phase-change coolan…

Van der Waals Gas Simulator — Real Gas Compressibility Factor

Gas & Thermodynamic Properties

Van der Waals gas simulator computing real gas compressibility factor Z, molar volume, and critical points from pressure and temperature constants.

CO₂-Based Ventilation Rate Simulator

HVAC & Psychrometrics

CO₂-Based Ventilation Rate Simulator: Use the CO₂ that people exhale as an indicator to size the ventilation a room needs. Change the occupancy, room volume …

WBGT (Wet Bulb Globe Temperature) Heat Index Simulator

HVAC & Psychrometrics

Compute WBGT heat index in real-time from temperature, humidity, and radiation. Check heat stress risk categories per JIS Z 8504 and MHLW guidelines.

Wien Displacement Law Simulator — Peak Wavelength of Black-Body Radiation

Thermal Radiation

Wien displacement simulator: real-time peak wavelength from lambda_max*T=b and Stefan-Boltzmann q=eps*sigma*T^4, plus total radiated power and irradiance at distance R.