DOE/ORNL Fingertip Fluid Properties (fProps)

Welcome to the Fingertip Fluid Properties (fProps) on the web

This website provides free fluid properties, easily accessible using your iPhone or other mobile devices, i.e. fingertips, with an INTERNET connection. It includes properties of psychrometric (air), coolant (water and glycols), refrigerants, and capacity calculation functions. It aims to support technicians and engineers to have a quick check of these properties when they work in the field. for example, installing a HVAC equipment. The main driver is to accelerate transition from conventional refrigerants having high global warming potential (GWP) to new low GWP refrigerants, to support professionals using these new refrigerants.

The user can specify the inputs of each property calculation module. An example case is provided for each individual module.

The wizard will guide you through the use of the property modules. The wizard includes numerous property modules in multiple categories. You are more than welcome to work with us and create other new modules or categories for your interest. If you have suggestions or find any bugs related to this property calculation tool, please contact the author, Bo Shen, shenb@ornl.gov.

Below, you can either expand a category by clicking the triangle on the left, select an existing module and make your inputs (Customize Configuration).

Step-by-Step: Select a calculation module->Click "Customize Configuration"->Select major refrigerant type if refrigerant property is needed->Click "Next"->Edit inputs->Click "Next"->Click "Run"->See results.

Main Image
Category / Configuration Description
Refrigerant Properties
1.PtoDew Calculate dew point temperature at given pressure
2.PtoBubble Calculate bubble point temperature at given pressure
3.DewtoP Calculate pressure at given dew point temperature
4.BubbletoP Calculate pressure at given bubble point temperature
5.PTtoSuperheat Calculate superheat degree at given pressure and temperature
6.PTtoSubcool Calculate subcooling degree at given pressure and temperature
7.TSuptoP Calculate pressure at given temperature and superheat degree
8.TSubtoP Calculate pressure at given temperature and subcooling degree
9.PSuptoT Calculate temperature at given pressure and superheat degree
10.PSubtoT Calculate temperature at given pressure and subcooling degree
Psychrometric Properties
1.TdbTwb Calculate air properties at given dry bulb and wet bulb temperatures
2.TdbRH Calculate air properties at given dry bulb temperature and relative humidity
3.TdbTdew Calculate air properties at given dry bulb temperature and dew point temperature
4.TdbW Calculate air properties at given dry bulb temperature and specific humidity
5.TwbRH Calculate air properties at given wet bulb temperature and relative humidity
6.TdewRH Calculate air properties at given dew point temperature and relative humidity
7.TwbTdew Calculate air properties at given wet bulb temperature and dew point temperature
8.RHW Calculate air properties at given relative humidity and specific humidity
Coolant Properties
1.Water Calculate water properties at given temperature
2.pGlycol Calculate properties of propylene glycol-water at given temperature and salt weight concentration
3.eGlycol Calculate properties of ethylene glycol-water at given temperature and salt weight concentration
4.sCholoride Calculate properties of sodium chloride-water at given temperature and salt weight concentration
5.cCholoride Calculate properties of calcium chloride-water at given temperature and salt weight concentration
6.mAlcohol Calculate properties of methyl alcohol-water at given temperature and alcohol weight concentration
7.eAlcohol Calculate properties of ethyl alcohol-water at given temperature and alcohol weight concentration
Capacity calculation
1.AirCapacity Calculate air side capacity
2.CoolantCapacity Calculate coolant side capacity
3.RefrigerantCapacity Calculate refrigerant side capacity