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.

Great Sensible Heat Factor - GSHF

Sponsored Links

A cooling coil should have the capacity to handle the heat load generated in the room in addition the capacity to cool down the fresh make up air. The Great Sensible Factor is independent of the total air flow and can be expressed as

GSHF = [Qs + mf cp (tf - tr)] / [Qt + mf (hf - hr)]                                  (1)


GSHF = Great Sensible Heat Factor

Qs = sensible heat generated in the room (kW)

mf = fresh air mass flow (make up air) (kg/s)

cp = specific heat of air (kg/kg.oC)

tf = temperature in fresh air (oC)

tr = temperature in room air (oC)

Qt = total heat generated in the room (kW)

hf = specific enthalpy of fresh air (kJ/kgoC)

hr = specific enthalpy of air in the room (kJ/kgoC)

Example - Great Sensible Heat Factor - GSHF

The sensible heat generation in a room is 4 kW and the latent heat generated is 1.4 kW. The room is cooled with an air flow of 1000 kg/h.

The fresh (out door) air temperature is 28oC with a specific enthalpy of 60 kJ/kg and a humidity ratio of 12.7 g/kg.

The room temperature is 22oC with a specific enthalpy of 45 kJ/kg and a specific humidity of 9.1 g/kg.

The Great Sensible Heat Factor can be calculated like

GSHF = [(4000 W) + (1000 kg/h)(1/3600 s/h)(1000 J/kgoC)(28oC - 22oC)] / [(4000 W + 1400 W) + (1000 kg/h)(1/3600 s/h)(60000 J/kg - 45000 J/kg)]

= 0.59

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

Air - Humidity Ratio

The mass of water vapor present in moist air - to the mass of dry air.

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.

Humid Air - Heating

Enthalpy change and temperature rise when heating humid air without adding moisture.

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.

Metabolic Heat Gain from Persons

Human metabolic heat gain in air conditioned rooms.

Moist Air - Cooling and Dehumidifying

Cooling and dehumidifying processes of moist and humid air - sensible and latent cooling.

Moist Air - Enthalpy

Sensible and latent heat of moist air.

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 Flow

Sensible heat is dry heat causing change in temperature but not in moisture content

Sensible Heat Ratio - SHR

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

Water - Thermophysical Properties

Thermal properties of water at different temperatures like density, freezing temperature, boiling temperature, latent heat of melting, latent heat of evaporation, critical temperature and more.

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.