Question

The two commonly used insulating materials used in the annular space of a cryotainer are

a. fiberglass and glass wool.
b. fiberglass and mylar film.
c. crushed glass perlite beads and glass wool.
d. crushed glass perlite beads and mylar film.

Answer 1

The insulating materials used in a cryotainer are crushed glass perlite beads and mylar film, which provide excellent insulation to maintain the low temperatures needed for cryogenic liquids.

Step-by-step explanation:

The two commonly used insulating materials used in the annular space of a cryotainer are crushed glass perlite beads and mylar film. These materials are chosen for their excellent insulation properties which are crucial in cryogenic storage devices. Cryogenic liquids, such as liquefied gases, require effective insulation to maintain their extremely low temperatures. For example, crushed glass perlite beads effectively minimize heat transfer due to their low thermal conductivity and mylar film provides a barrier to radiant heat transfer. Additionally, materials like fiberglass batt are used for insulation of walls and ceilings to prevent heat transfer between the inside of a building and the outside environment, as shown in Figure 1.23 and Figure 14.16.