Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

This is an AMP page - Open full page! for all features.

Sensible Heat Flow

Sponsored Links

Sensible Heat Flow - SI-Units

The sensible heat flow can be expressed in SI-units (metric) as

Qs = cp ρ q Δt / 3600                            (1)


Qs = sensible heat flow (kW)

cp = 1.005* - specific heat air (kJ/kg K)

ρ = 1.202* - air density at standard conditions (kg/m3)

q = air flow (m3/hr)

Δt = temperature (oC)

* Note that air properties changes with temperature. Interpolate values if necessary.

Sensible Heat Flow - English (Imperial) units

In English (imperial) units the sensible flow heat can be expressed as

Qs= 60 cp ρ q Δt = 1.075 q Δt                                    (2)


Qs = sensible heat flow (Btu/hr)

cp = 0.2388 - specific heat (Btu/lboF)

ρ = 0.075 - air density at standard conditions (lb/ft3)

q = air flow in (ft3/min)

Δt = temperature difference (oF)

Example - Sensible Heat Flow

10000 m3/h of air is transported through a building with the ventilation system. The temperature of the make up air is 0 oC. The temperature of the room air is 20 oC.

The sensible heat flow can be calculated as

Ql = (1.005 kJ/kg) (1.202 kg/m3) (10000 m3/h) ((20 oC) - (0 oC)) / 3600 

    = 67 kW

Sponsored Links

Related Topics

Air Psychrometrics

Moist and humid air calculations. Psychrometric charts and Mollier diagrams. Air-condition systems temperatures, absolute and relative humidities and moisture content in air.

Related Documents

Cooling and Heating Equations

Latent and sensible cooling and heating equations - imperial units.

Cooling Load - Latent and Sensible Heat

Latent and sensible cooling loads to consider when designing HVAC systems.

Great Sensible Heat Factor - GSHF

The Great Sensible Heat Factor is the ratio sensible to total heat in a cooling coil.

Latent Heat Flow

Latent heat is the heat when supplied to or removed from air results in a change in moisture content - the temperature of the air is not changed.

Room Sensible Heat Factor - RSHF

Room Sensible Heat Factor - RSHF - is defined as the sensible heat load divided by the total heat load in a room

Sensible Heat Ratio - SHR

The ratio Sensible Heat (or Cooling) Load to the Total Heat (or Cooling) Load.

Sponsored Links

Search Engineering ToolBox

  • the most efficient way to navigate the Engineering ToolBox!

SketchUp Extension - Online 3D modeling!

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!


We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.

Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.

Google use cookies for serving our ads and handling visitor statistics. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected.

AddThis use cookies for handling links to social media. Please read AddThis Privacy for more information.