What are savENRG® CRT Packs?
savENRG® Controlled Room Temperature (CRT) Packs are manufactured using a paraffin-based phase change material (PCM). This material solidifies as the surrounding temperature drops from 20°C to 15°C (68°F to 59°F) releasing heat and then melts as the temperature rises from 15°C to 20°C (59°F to 68°F) absorbing heat.
Why are savENRG® CRT Packs better than regular gel packs?
savENRG® CRT Packs work best in the range of 15°C to 20°C (59°F to 68°F) while gel packs work best in the range of -5°C to +5°C (23°F to 41°F).
When a gel pack is used to keep a product from overcooling within a room temperature range of 25°C to 15°C (77°F to 59°F), its capacity to absorb cold from the ambient temperature is low – 4.186 J/gC (1g of gel cools down by 1°C while it absorbs 4.186 Joules of cold).
When a savENRG® CRT Pack is used for the same application within a temperature range of 20°C to 15°C (68°F to 59°F), its capacity to absorb cold from the ambient conditions is very high – 230.000 J/gC (1g of savENRG® CRT PCM absorbs 230 Joules of cold without changing temperature). Thus, a smaller quantity of savENRG® CRT PCM can safely keep a product from overcooling as compared to the quantity that will be needed for a gel pack.