Practical thermal resistance and ice requirement calculations for insulating packages
✍ Scribed by Gary Burgess
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 111 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0894-3214
No coin nor oath required. For personal study only.
✦ Synopsis
Several styles of insulating packages were studied, ranging in size from 0.5 to 5 cubic feet and varying in construction from the ordinary expanded polystyrene cooler to various liner-in-box arrangements with and without aluminium foil surfaces. Ice-melt tests were conducted to measure package insulating ability and the results were used to determine the thermal resistance (R-value). The R-value was then related to details connected with package construction including wall thickness, number of layers and number of foil surfaces through a simple equation so that it can be estimated for any construction. The system R-value can then be used to estimate refrigerant requirements and temperature holding times for known shipping environments. Examples are included.