Conventional wallboard with latent heat storage for passive solar applications

Conference · Mon Jan 01 04:00:00 EST 1990

DOI:https://doi.org/10.1109/IECEC.1990.716492· OSTI ID:6816636

Kedl, R J

Conventional wallboard impregnated with octadecane paraffin (Melting Point -- 73.5{degree}F) is being developed as a building material with latent heat storage for passive solar applications. Impregnation was accomplished simply by soaking the wallboard in molten paraffin. Concentrations of paraffin in the combined product as high as 35{percent} by weight were achieved. In support of this concept, a computer model was developed to describe thermal transport and storage by a phase change material (PCM) dispersed in a porous media. The computer model was confirmed by comparison with known analytical solutions where the PCM melts at a specific melting point. However, agreement between the model and an experimentally produced thermal transient involving impregnated wallboard was only good after the model was modified to allow the paraffin to melt over a temperature range. This was accomplished by replacing the heat of fusion with a triangular heat capacity relationship that mimics the triangular melt curve found through differential scanning calorimetry. When this change was made, agreement between the model and the experimental transient was very good. 4 refs., 8 figs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: DOE/CE
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6816636
• Report Number(s): CONF-900801-14; ON: DE90012136
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
142000 -- Solar Energy-- Heat Storage-- (1980-)
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320107* -- Energy Conservation
Consumption
& Utilization-- Building Systems-- (1987-)
ALKALINE EARTH METAL COMPOUNDS
ALKANES
BUILDING MATERIALS
CALCIUM COMPOUNDS
CALCIUM SULFATES
COMPUTER CODES
DATA
ENERGY STORAGE
ENERGY SYSTEMS
ENTHALPY
EQUIPMENT
EXPERIMENTAL DATA
FUSION HEAT
GYPSUM
HEAT STORAGE
HEATING SYSTEMS
HYDROCARBONS
IMPREGNATION
INFORMATION
LATENT HEAT STORAGE
MATERIALS
MINERALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PARAFFIN
PASSIVE SOLAR HEATING SYSTEMS
PHASE CHANGE MATERIALS
PHYSICAL PROPERTIES
SOLAR EQUIPMENT
SOLAR HEATING SYSTEMS
STORAGE
SULFATE MINERALS
SULFATES
SULFUR COMPOUNDS
THERMAL ANALYSIS
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION HEAT
W CODES
WAXES