Buildings of all sizes and dimensions are at the mercy of solar gains, temperature fluctuations and the effects of internal heat sources, such as humans and electrical equipment.
In structures with a low thermal mass, as for example in light weight constructions, temperature fluctuations are much higher than in massive constructions and are typically offset by the use of air conditioning or alternative heating or cooling systems which may result not only in higher operational costs but also higher CO2 emissions.
Room climate vs. thermal mass
DuPont™ Energain® phase change material as thermal mass provides a comfortable and well balanced indoor climate. When comparing Energain® with traditional thermal mass like concrete, it can store more energy than concrete with less of its mass.
The following example demonstrates a comparison between the probability simulation of temperature reach <=26°C for a standard lightweight modular building with no thermal mass and one with DuPont™ Energain® as thermal mass in conditions that reflect the moderate Western European climate zone. The building specification include: container size 2.3 x 2.3 x 6 m, building volume 31.74 m³, building surface 13.76 m², insulated by 100 mm mineral wool (0.038 W/mK), 4m² window surface, 2m² door surface, ventilation of 0.5/h, geographic location: Rennes, France.
Thermal mass impact on temperature throughout year, Source: DuPont
DuPont™ Energain® thermal mass panel, installed in the ceiling, enables the room temperature to be maintained at <= 26°C for 95% of year. Without thermal mass this temperature can only be maintained 80% of the year.