how to use phase changing materials (PCM)

GuidoM · December 10, 2012, 11:02

Hi there.
I'm about to install Autodesk Simulation CFD and I'd like to know if it is possible to calculate PCM (phase changing materials). If yes, how?

I'd like to use it in the false ceiling and use this product: http://www.micronal.de/portal/load/f...09_English.pdf

more info here: http://www.micronal.de/portal/basf/i...ursor=1_290814

basically it changes phase from solid to liquid when the temperature goes up to maintain the room temperature stable.

Any hint/tip/link/help is highly appreciated.
Thank you!
Guido

marktm250xc · January 11, 2013, 17:10

With some assumptions, you can approximate this by adjusting the specific heat Cp to vary in a piecewise linear fashion based on temperature. For example, water has a higher Cp for liquid state compared to solid ice state. At the transition point (0C) the Cp spikes above that of the solid Cp over a very narrow temp band. For temperatures outside this band, the Cp is set for the appropriate phase state.

ahvz · May 15, 2013, 06:42

how to define as a enthalpy-temperature relationships ? is it possible to apply enthalpy method for the PCM effect into Autodesk Simulation CFD?

regards,

jarrysimon123 · May 21, 2013, 07:38

A phase-change material (PCM) is a substance with a high heat of fusion which, melting and solidifying at a certain temperature, is capable of storing and releasing large amounts of energy.

OTB Consulting

rzyz · April 11, 2016, 16:02

Where can I find the viscosity value for PCMs produced by RUBITHERM company such as RT28HC and SP29Eu which is not available in their data sheet?

December 10, 2012, 11:02	how to use phase changing materials (PCM)	#1
GuidoM New Member Guido Join Date: Dec 2012 Posts: 1 Rep Power: 0	Hi there. I'm about to install Autodesk Simulation CFD and I'd like to know if it is possible to calculate PCM (phase changing materials). If yes, how? I'd like to use it in the false ceiling and use this product: http://www.micronal.de/portal/load/f...09_English.pdf more info here: http://www.micronal.de/portal/basf/i...ursor=1_290814 basically it changes phase from solid to liquid when the temperature goes up to maintain the room temperature stable. Any hint/tip/link/help is highly appreciated. Thank you! Guido jarrysimon123 likes this.

April 11, 2016, 16:02	PCM viscosity value?	#5
rzyz New Member Rami Join Date: Mar 2016 Posts: 4 Rep Power: 10	Where can I find the viscosity value for PCMs produced by RUBITHERM company such as RT28HC and SP29Eu which is not available in their data sheet?

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January 11, 2013, 17:10		#2
marktm250xc New Member Mark Decker Join Date: Jan 2013 Location: Central Virginia Posts: 21 Rep Power: 14	With some assumptions, you can approximate this by adjusting the specific heat Cp to vary in a piecewise linear fashion based on temperature. For example, water has a higher Cp for liquid state compared to solid ice state. At the transition point (0C) the Cp spikes above that of the solid Cp over a very narrow temp band. For temperatures outside this band, the Cp is set for the appropriate phase state.

May 15, 2013, 06:42		#3
ahvz Senior Member Moha Join Date: Mar 2013 Location: EU Posts: 103 Rep Power: 0	how to define as a enthalpy-temperature relationships ? is it possible to apply enthalpy method for the PCM effect into Autodesk Simulation CFD? regards,

May 21, 2013, 07:38		#4
jarrysimon123 New Member Jarry Simon Join Date: May 2013 Location: UK Posts: 2 Rep Power: 0	A phase-change material (PCM) is a substance with a high heat of fusion which, melting and solidifying at a certain temperature, is capable of storing and releasing large amounts of energy. OTB Consulting